docs: virtual machines running on kubevirt

docs: hosts
Merge pull request #110 from ryan4yin/migrate-services-to-aarch
2026-05-28 18:39:31 +02:00 · 2024-03-31 17:08:24 +08:00 · 2024-03-31 17:01:47 +08:00 · 2024-03-31 16:53:11 +08:00 · 2024-03-31 16:50:17 +08:00 · 2024-03-31 15:35:08 +08:00
821 changed files with 67938 additions and 3578 deletions
@@ -0,0 +1,3 @@
+# https://github.com/github-linguist/linguist/blob/master/docs/overrides.md
+
+home/linux/desktop/i3/conf/polybar/** linguist-vendored
@@ -1,2 +1,2 @@
 patreon: ryan4yin
-custom:  ['https://buymeacoffee.com/ryan4yin', 'https://afdian.net/a/ryan4yin']
+custom: ["https://buymeacoffee.com/ryan4yin", "https://afdian.net/a/ryan4yin"]
@@ -1,24 +0,0 @@
-name: Nix Flake Check
-
-on: [push, pull_request, workflow_dispatch]
-
-jobs:
-  checks:
-    name: Check expressions
-    runs-on: ubuntu-latest
-
-    steps:
-      # - name: Checkout repository
-      #   uses: actions/checkout@v4
-      # - name: Install nix
-      #   uses: cachix/install-nix-action@v24
-      #   with:
-      #     install_url: https://nixos.org/nix/install
-      #     extra_nix_config: |
-      #       access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      #       experimental-features = nix-command flakes
-
-      - name: Run Nix Flake Check
-        run: |
-          echo 'TODO: nix flake check'
-          # nix flake check
@@ -0,0 +1,42 @@
+name: Nix Flake Eval Tests
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - "scripts/**"
+      - "**.md"
+      - "**.nu"
+      - "Justfile"
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - "scripts/**"
+      - "**.md"
+      - "**.nu"
+      - "Justfile"
+
+jobs:
+  checks:
+    name: Check expressions
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install nix
+        uses: cachix/install-nix-action@v24
+        with:
+          install_url: https://nixos.org/nix/install
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+            experimental-features = nix-command flakes
+
+      - name: Run Nix Flake Eval Tests
+        run: |
+          echo 'Flake Eval Tests'
+          # stack overflow...
+          # nix eval .#checks --show-trace --print-build-logs --verbose
+          nix eval .#evalTests --show-trace --print-build-logs --verbose
@@ -1,7 +1,11 @@
 name: Mirror this repo to Gitee
 on:
-  workflow_dispatch: {}
-  push: {}
+  push:
+    branches:
+      - main
+    tags:
+      - "*"
+
 jobs:
  mirror:
    runs-on: ubuntu-latest
@@ -26,4 +30,3 @@ jobs:
          export GIT_SSH_COMMAND="ssh -v -i ~/.ssh/id_rsa -o StrictHostKeyChecking=no"
          git remote add mirror "$INPUT_TARGET_REPO_URL"
          git push --tags --force --prune mirror "refs/remotes/origin/*:refs/heads/*"
-
@@ -0,0 +1,8 @@
+LICENSE.md
+dist
+pnpm-lock.yaml
+flake.lock
+vercel.json
+cache
+temp
+.temp
@@ -0,0 +1,6 @@
+# https://prettier.io/docs/en/options
+semi: false
+singleQuote: false
+printWidth: 100
+proseWrap: always # always change wrapping in markdown text
+trailingComma: es5
@@ -0,0 +1,12 @@
+[files]
+ignore-dot = true
+ignore-files = true
+extend-exclude = ["themes/", "data/", "static-surprises/", "resources/"]
+
+[default]
+binary = false
+# ignore some special identifiers(sha256, mac address, crypto keys, etc)
+extend-ignore-re = [
+  "iterm2",
+  "iHgEIBYKACAWIQSizQe9ljFEyyclWmtVhZllwnQrSwUCZZ1T9wIdAAAKCRBVhZll", # crypto keys
+]
@@ -11,23 +11,27 @@ set shell := ["nu", "-c"]

 i3 mode="default":
  use utils.nu *; \
-  nixos-switch ai_i3 {{mode}}
+  nixos-switch ai-i3 {{mode}}

 hypr mode="default":
  use utils.nu *; \
-  nixos-switch ai_hyprland {{mode}}
+  nixos-switch ai-hyprland {{mode}}


 s-i3 mode="default":
  use utils.nu *; \
-  nixos-switch shoukei_i3 {{mode}}
+  nixos-switch shoukei-i3 {{mode}}


 s-hypr mode="default":
  use utils.nu *; \
-  nixos-switch shoukei_hyprland {{mode}}
+  nixos-switch shoukei-hyprland {{mode}}

+# Run eval tests
+test:
+  nix eval .#evalTests --show-trace --print-build-logs --verbose

+# update all the flake inputs
 up:
  nix flake update

@@ -36,21 +40,29 @@ up:
 upp input:
  nix flake lock --update-input {{input}}

+# List all generations of the system profile
 history:
  nix profile history --profile /nix/var/nix/profiles/system

+# Open a nix shell with the flake
 repl:
  nix repl -f flake:nixpkgs

+# remove all generations older than 7 days
 clean:
-  # remove all generations older than 7 days
  sudo nix profile wipe-history --profile /nix/var/nix/profiles/system  --older-than 7d

+# Garbage collect all unused nix store entries
 gc:
  # garbage collect all unused nix store entries
  sudo nix store gc --debug
  sudo nix-collect-garbage --delete-old

+# Remove all reflog entries and prune unreachable objects
+gitgc:
+  git reflog expire --expire-unreachable=now --all
+  git gc --prune=now
+
 ############################################################################
 #
 #  Darwin related commands, harmonica is my macbook pro's hostname
@@ -65,52 +77,78 @@ darwin-rollback:
  use utils.nu *; \
  darwin-rollback

+# Deploy to harmonica(macOS host)
 ha mode="default":
  use utils.nu *; \
  darwin-build "harmonica" {{mode}}; \
  darwin-switch "harmonica" {{mode}}

+# Depoly to fern(macOS host)
 fe mode="default": darwin-set-proxy
  use utils.nu *; \
  darwin-build "fern" {{mode}}; \
  darwin-switch "fern" {{mode}}

+# Reload yabai and skhd(macOS)
+yabai-reload:
+  launchctl kickstart -k "gui/502/org.nixos.yabai";
+  launchctl kickstart -k "gui/502/org.nixos.skhd"; 
+
 ############################################################################
 #
-#  Idols, Commands related to my remote distributed building cluster
+#  Homelab - Virtual Machines running on Kubevirt
 #
 ############################################################################

-idols-ssh-key:
-  ssh-add ~/.ssh/ai-idols
+# Remote deployment via colmena
+col tag:
+  colmena apply --on '@{{tag}}' --verbose --show-trace

-idols: idols-ssh-key
-  colmena apply --on '@dist-build'
+# Build and upload a vm image
+upload-vm name mode="default":
+  use utils.nu *; \
+  upload-vm {{name}} {{mode}}
+
+# Deploy all the KubeVirt nodes(Physical machines running KubeVirt)
+lab:
+  colmena apply --on '@virt-*' --verbose --show-trace
+
+# Deploy all the VMs running on KubeVirt
+vm:
+  colmena apply --on '@homelab-*' --verbose --show-trace

 aqua:
-  colmena apply --on '@aqua'
+  colmena apply --on '@aqua' --verbose --show-trace
+  # some config changes require a restart of the dae service
+  ssh root@aquamarine "sudo systemctl stop dae; sleep 1; sudo systemctl start dae"

 ruby:
-  colmena apply --on '@ruby'
+  colmena apply --on '@ruby' --verbose --show-trace
+
+ruby-local mode="default":
+  use utils.nu *; \
+  nixos-switch ruby {{mode}}

 kana:
-  colmena apply --on '@kana'
+  colmena apply --on '@kana' --verbose --show-trace

-idols-debug: idols-ssh-key
-  colmena apply --on '@dist-build' --verbose --show-trace
+############################################################################
+#
+# Kubernetes related commands
+#
+############################################################################

-# only used once to setup the virtual machines
-idols-image:
-  # take image for idols, and upload the image to proxmox nodes.
-  nom build .#aquamarine
-  scp result root@gtr5:/var/lib/vz/dump/vzdump-qemu-aquamarine.vma.zst
+k3s:
+  colmena apply --on '@k3s-*' --verbose --show-trace

-  nom build .#ruby
-  scp result root@s500plus:/var/lib/vz/dump/vzdump-qemu-ruby.vma.zst
+master:
+  colmena apply --on '@k3s-prod-1-master-*' --verbose --show-trace

-  nom build .#kana
-  scp result root@um560:/var/lib/vz/dump/vzdump-qemu-kana.vma.zst
+worker:
+  colmena apply --on '@k3s-prod-1-worker-*' --verbose --show-trace

+k3s-test:
+  colmena apply --on '@k3s-test-*' --verbose --show-trace

 ############################################################################
 #
@@ -118,17 +156,14 @@ idols-image:
 #
 ############################################################################

-roll: idols-ssh-key
-  colmena apply --on '@riscv'
-
-roll-debug: idols-ssh-key
-  colmena apply --on '@dist-build' --verbose --show-trace
+riscv:
+  colmena apply --on '@riscv' --verbose --show-trace

 nozomi:
-  colmena apply --on '@nozomi'
+  colmena apply --on '@nozomi' --verbose --show-trace

 yukina:
-  colmena apply --on '@yukina'
+  colmena apply --on '@yukina' --verbose --show-trace

 ############################################################################
 #
@@ -137,13 +172,21 @@ yukina:
 ############################################################################

 aarch:
-  colmena apply --on '@aarch'
+  colmena apply --on '@aarch' --build-on-target --verbose --show-trace

 suzu:
-  colmena apply --on '@suzu'
+  colmena apply --on '@suzu' --build-on-target --verbose --show-trace

-suzu-debug:
-  colmena apply --on '@suzu' --verbose --show-trace
+suzu-local mode="default":
+  use utils.nu *; \
+  nixos-switch suzu {{mode}}
+
+rakushun:
+  colmena apply --on '@rakushun' --build-on-target --verbose --show-trace
+
+rakushun-local mode="default":
+  use utils.nu *; \
+  nixos-switch rakushun {{mode}}

 ############################################################################
 #
@@ -155,6 +198,9 @@ fmt:
  # format the nix files in this repo
  nix fmt

+path:
+   $env.PATH | split row ":"
+
 nvim-test:
  rm -rf $"($env.HOME)/.config/astronvim/lua/user"
  rsync -avz --copy-links --chmod=D2755,F744 home/base/desktop/editors/neovim/astronvim_user/ $"($env.HOME)/.config/astronvim/lua/user"
@@ -197,3 +243,14 @@ emacs-purge:
 emacs-reload:
  doom sync
  {{reload-emacs-cmd}}
+
+
+# =================================================
+#
+# Kubernetes related commands
+#
+# =================================================
+
+
+del-failed:
+   kubectl delete pod --all-namespaces --field-selector="status.phase==Failed"
@@ -8,62 +8,84 @@
 	<a href="https://github.com/ryan4yin/nix-config/stargazers">
 		<img alt="Stargazers" src="https://img.shields.io/github/stars/ryan4yin/nix-config?style=for-the-badge&logo=starship&color=C9CBFF&logoColor=D9E0EE&labelColor=302D41"></a>
    <a href="https://nixos.org/">
-        <img src="https://img.shields.io/badge/NixOS-23.05-informational.svg?style=for-the-badge&logo=nixos&color=F2CDCD&logoColor=D9E0EE&labelColor=302D41"></a>
+        <img src="https://img.shields.io/badge/NixOS-23.11-informational.svg?style=for-the-badge&logo=nixos&color=F2CDCD&logoColor=D9E0EE&labelColor=302D41"></a>
    <a href="https://github.com/ryan4yin/nixos-and-flakes-book">
        <img src="https://img.shields.io/static/v1?label=Nix Flakes&message=learning&style=for-the-badge&logo=nixos&color=DDB6F2&logoColor=D9E0EE&labelColor=302D41"></a>
  </a>
 </p>

-This repository is home to the nix code that builds my systems.
+> My configuration is becoming more and more complex, and it may be difficult for beginners to read
+> it. If you are new to NixOS and want to know how I use NixOS, I would recommend you to take a look
+> at the [ryan4yin/nix-config/releases](https://github.com/ryan4yin/nix-config/releases) first,
+> **checkout to some simpler older versions**, which will be much easier to understand.
+
+This repository is home to the nix code that builds my systems:
+
+1. NixOS Desktops: NixOS with home-manager, i3, hyprland, agenix, etc.
+2. macOS Desktops: nix-darwin with home-manager, share the same home-manager configuration with
+   NixOS Desktops.
+3. NixOS Servers: virtual machines running on Proxmox, with various services, such as kubernetes,
+   homepage, prometheus, grafana, etc.
+
+See [./hosts](./hosts) for details of each host.

 ## Why NixOS & Flakes?

-Nix allows for easy-to-manage, collaborative, reproducible deployments. This means that once something is setup and configured once, it works (almost) forever. If someone else shares their configuration, anyone else can just use it (if you really understand what you're copying/refering now).
+Nix allows for easy-to-manage, collaborative, reproducible deployments. This means that once
+something is setup and configured once, it works (almost) forever. If someone else shares their
+configuration, anyone else can just use it (if you really understand what you're copying/refering
+now).

-As for Flakes, refer to [Introduction to Flakes - NixOS & Nix Flakes Book](https://nixos-and-flakes.thiscute.world/nixos-with-flakes/introduction-to-flakes)
+As for Flakes, refer to
+[Introduction to Flakes - NixOS & Nix Flakes Book](https://nixos-and-flakes.thiscute.world/nixos-with-flakes/introduction-to-flakes)

-**Want to know NixOS & Flaks in detail? Looking for a beginner-friendly tutorial or best practices? You don't have to go through the pain I've experienced again! Check out my [NixOS & Nix Flakes Book - 🛠️ ❤️ An unofficial & opinionated :book: for beginners](https://github.com/ryan4yin/nixos-and-flakes-book)!**
+**Want to know NixOS & Flaks in detail? Looking for a beginner-friendly tutorial or best practices?
+You don't have to go through the pain I've experienced again! Check out my
+[NixOS & Nix Flakes Book - 🛠️ ❤️ An unofficial & opinionated :book: for beginners](https://github.com/ryan4yin/nixos-and-flakes-book)!**

-> If you're using macOS, check out [ryan4yin/nix-darwin-kickstarter](https://github.com/ryan4yin/nix-darwin-kickstarter) for a quick start.
+> If you're using macOS, check out
+> [ryan4yin/nix-darwin-kickstarter](https://github.com/ryan4yin/nix-darwin-kickstarter) for a quick
+> start.

 ## Components

-|                             | NixOS(Wayland)                                                                                                    | NixOS(Xorg)                                                                                                       |
-| --------------------------- | :---------------------------------------------------------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------- |
-| **Window Manager**          | [Hyprland][Hyprland]                                                                                              | [i3][i3]                                                                                                          |
-| **Terminal Emulator**       | [Zellij][Zellij] + [Kitty][Kitty]                                                                                 | [Zellij][Zellij] + [Kitty][Kitty]                                                                                 |
-| **Bar**                     | [Waybar][Waybar]                                                                                                  | [polybar][polybar]                                                                                                |
-| **Application Launcher**    | [anyrun][anyrun]                                                                                                  | [rofi][rofi]                                                                                                      |
-| **Notification Daemon**     | [Mako][Mako]                                                                                                      | [Dunst][Dunst]                                                                                                    |
-| **Display Manager**         | [GDM][GDM]                                                                                                        | [GDM][GDM]                                                                                                        |
-| **Color Scheme**            | [Catppuccin][Catppuccin]                                                                                          | [Catppuccin][Catppuccin]                                                                                          |
-| **network management tool** | [NetworkManager][NetworkManager]                                                                                  | [NetworkManager][NetworkManager]                                                                                  |
-| **Input method framework**  | [Fcitx5][Fcitx5]                                                                                                  | [Fcitx5][Fcitx5]                                                                                                  |
-| **System resource monitor** | [Btop][Btop]                                                                                                      | [Btop][Btop]                                                                                                      |
-| **File Manager**            | [Yazi][Yazi] + [thunar][thunar]                                                                                   | [Yazi][Yazi] + [thunar][thunar]                                                                                   |
-| **Shell**                   | [Nushell][Nushell] + [Starship][Starship]                                                                         | [Nushell][Nushell] + [Starship][Starship]                                                                         |
-| **Music Player**            | [mpd][mpd], [ncmpcpp][ncmpcpp], [mpc][mpc], [Netease-cloud-music-gtk][netease-cloud-music-gtk]                    | [Netease-cloud-music-gtk][netease-cloud-music-gtk]                                                                |
-| **Media Player**            | [mpv][mpv]                                                                                                        | [mpv][mpv]                                                                                                        |
-| **Text Editor**             | [Neovim][Neovim] + [DoomEmacs][DoomEmacs]                                                                         | [Neovim][Neovim] + [DoomEmacs][DoomEmacs]                                                                         |
-| **Fonts**                   | [Nerd fonts][Nerd fonts]                                                                                          | [Nerd fonts][Nerd fonts]                                                                                          |
-| **Image Viewer**            | [imv][imv]                                                                                                        | [imv][imv]                                                                                                        |
-| **Screenshot Software**     | [grim][grim]                                                                                                      | [flameshot](https://github.com/flameshot-org/flameshot)                                                           |
-| **Screen Recording**        | [OBS][OBS]                                                                                                        | [OBS][OBS]                                                                                                        |
-| **Filesystem & Encryption** | tmpfs on `/`, [Btrfs][Btrfs] subvolumes on a [LUKS][LUKS] crypted partition for persistent, unlock via passphrase | tmpfs on `/`, [Btrfs][Btrfs] subvolumes on a [LUKS][LUKS] crypted partition for persistent, unlock via passphrase |
-| **Secure Boot**             | [lanzaboote][lanzaboote]                                                                                          | [lanzaboote][lanzaboote]                                                                                          |
+|                             | NixOS(Wayland)                                                                                                      | NixOS(Xorg)                                                                                                         |
+| --------------------------- | :------------------------------------------------------------------------------------------------------------------ | :------------------------------------------------------------------------------------------------------------------ |
+| **Window Manager**          | [Hyprland][Hyprland]                                                                                                | [i3][i3]                                                                                                            |
+| **Terminal Emulator**       | [Zellij][Zellij] + [Kitty][Kitty]                                                                                   | [Zellij][Zellij] + [Kitty][Kitty]                                                                                   |
+| **Bar**                     | [Waybar][Waybar]                                                                                                    | [polybar][polybar]                                                                                                  |
+| **Application Launcher**    | [anyrun][anyrun]                                                                                                    | [rofi][rofi]                                                                                                        |
+| **Notification Daemon**     | [Mako][Mako]                                                                                                        | [Dunst][Dunst]                                                                                                      |
+| **Display Manager**         | [GDM][GDM]                                                                                                          | [GDM][GDM]                                                                                                          |
+| **Color Scheme**            | [Catppuccin][Catppuccin]                                                                                            | [Catppuccin][Catppuccin]                                                                                            |
+| **network management tool** | [NetworkManager][NetworkManager]                                                                                    | [NetworkManager][NetworkManager]                                                                                    |
+| **Input method framework**  | [Fcitx5][Fcitx5]                                                                                                    | [Fcitx5][Fcitx5]                                                                                                    |
+| **System resource monitor** | [Btop][Btop]                                                                                                        | [Btop][Btop]                                                                                                        |
+| **File Manager**            | [Yazi][Yazi] + [thunar][thunar]                                                                                     | [Yazi][Yazi] + [thunar][thunar]                                                                                     |
+| **Shell**                   | [Nushell][Nushell] + [Starship][Starship]                                                                           | [Nushell][Nushell] + [Starship][Starship]                                                                           |
+| **Music Player**            | [mpd][mpd], [ncmpcpp][ncmpcpp], [mpc][mpc], [Netease-cloud-music-gtk][netease-cloud-music-gtk]                      | [Netease-cloud-music-gtk][netease-cloud-music-gtk]                                                                  |
+| **Media Player**            | [mpv][mpv]                                                                                                          | [mpv][mpv]                                                                                                          |
+| **Text Editor**             | [Neovim][Neovim] + [DoomEmacs][DoomEmacs]                                                                           | [Neovim][Neovim] + [DoomEmacs][DoomEmacs]                                                                           |
+| **Fonts**                   | [Nerd fonts][Nerd fonts]                                                                                            | [Nerd fonts][Nerd fonts]                                                                                            |
+| **Image Viewer**            | [imv][imv]                                                                                                          | [imv][imv]                                                                                                          |
+| **Screenshot Software**     | [flameshot][flameshot] + [grim][grim]                                                                               | [flameshot][flameshot]                                                                                              |
+| **Screen Recording**        | [OBS][OBS]                                                                                                          | [OBS][OBS]                                                                                                          |
+| **Filesystem & Encryption** | tmpfs on `/`, [Btrfs][Btrfs] subvolumes on a [LUKS][LUKS] encrypted partition for persistent, unlock via passphrase | tmpfs on `/`, [Btrfs][Btrfs] subvolumes on a [LUKS][LUKS] encrypted partition for persistent, unlock via passphrase |
+| **Secure Boot**             | [lanzaboote][lanzaboote]                                                                                            | [lanzaboote][lanzaboote]                                                                                            |

 Wallpapers: https://github.com/ryan4yin/wallpapers

-## Hyprland + AstroNvim
+## Hyprland + AstroNvim + DoomEmacs

 ![](./_img/hyprland_2023-07-29_1.webp)

 ![](./_img/hyprland_2023-07-29_2.webp)

+![](./_img/emacs-2024-01-07.webp)
+
 ## I3 + AstroNvim

-![](./_img/i3_2023-07-29_1.webp)
-![](./_img/i3_2023-07-29_2.webp)
+![](./_img/i3_2023-07-29_1.webp) ![](./_img/i3_2023-07-29_2.webp)

 ## Neovim

@@ -73,42 +95,53 @@ See [./home/base/desktop/editors/neovim/](./home/base/desktop/editors/neovim/) f

 See [./home/base/desktop/editors/emacs/](./home/base/desktop/editors/emacs/) for details.

-## Hosts
-
-See [./hosts](./hosts) for details.
-
 ## Secrets Management

 See [./secrets](./secrets) for details.

 ## How to Deploy this Flake?

-> :red_circle: **IMPORTANT**: **You should NOT deploy this flake directly on your machine:exclamation: It will not succeed.** this flake contains my hardware configuration(such as [hardware-configuration.nix](hosts/idols/ai/hardware-configuration.nix), [cifs-mount.nix](https://github.com/ryan4yin/nix-config/blob/v0.1.1/hosts/idols/ai/cifs-mount.nix), [Nvidia Support](https://github.com/ryan4yin/nix-config/blob/v0.1.1/hosts/idols/ai/default.nix#L77-L91), etc.) which is not suitable for your hardware, and my private secrets repository [ryan4yin/nix-secrets](https://github.com/ryan4yin/nix-config/tree/main/secrets) that only I have access to. You may use this repo as a reference to build your own configuration.
+> :red_circle: **IMPORTANT**: **You should NOT deploy this flake directly on your machine
+> :exclamation: It will not succeed.** This flake contains my hardware configuration(such as
+> [hardware-configuration.nix](hosts/idols-ai/hardware-configuration.nix),
+> [cifs-mount.nix](https://github.com/ryan4yin/nix-config/blob/v0.1.1/hosts/idols_ai/cifs-mount.nix),
+> [Nvidia Support](https://github.com/ryan4yin/nix-config/blob/v0.1.1/hosts/idols-ai/default.nix#L77-L91),
+> etc.) which is not suitable for your hardwares, and requires my private secrets repository
+> [ryan4yin/nix-secrets](https://github.com/ryan4yin/nix-config/tree/main/secrets) to deploy. You
+> may use this repo as a reference to build your own configuration.

 For NixOS:

-> To deploy this flake from NixOS's official ISO image(purest installation method), please refer to [./nixos-installer/](./nixos-installer/)
+> To deploy this flake from NixOS's official ISO image(purest installation method), please refer to
+> [./nixos-installer/](./nixos-installer/)

 > Need to restart the machine when switching between `wayland` and `xorg`.

 ```bash
 # deploy one of the configuration based on the hostname
-sudo nixos-rebuild switch --flake .#ai_i3
-# sudo nixos-rebuild switch --flake .#ai_hyprland
+# sudo nixos-rebuild switch --flake .#ai_i3
+sudo nixos-rebuild switch --flake .#ai-hyprland

 # deploy via `just`(a command runner with similar syntax to make) & Justfile
-just i3    # deploy my pc with i3 window manager
-# just hypr  # deploy my pc with hyprland compositor
+# just i3    # deploy my pc with i3 window manager
+just hypr  # deploy my pc with hyprland compositor

 # or we can deploy with details
-just i3 debug
-# just hypr-debug
+# just i3 debug
+just hypr-debug
 ```

 For macOS:

 ```bash
-# deploy harmonicia's configuration(macOS Intel)
+# If you are deploying for the first time,
+# 1. install nix & homebrew manually.
+# 2. prepare the deployment environment with essential packages available
+nix-shell -p just nushell
+# 3. comment home-manager's code in lib/macosSystem.nix to speed up the first deplyment.
+# 4. comment out the proxy settings in scripts/darwin_set_proxy.py if the proxy is not ready yet.
+
+# 4. deploy harmonica's configuration(macOS Intel)
 just ha

 # deploy fern's configuration(Apple Silicon)
@@ -119,35 +152,8 @@ just ha debug
 # just fe debug
 ```

-> [What y'all will need when Nix drives you to drink.](https://www.youtube.com/watch?v=Eni9PPPPBpg) (copy from hlissner's dotfiles, it really matches my feelings when I first started using NixOS...)
-
-## How to create & managage VM from this flake?
-
-use `aquamarine` as an example, we can create a virtual machine with the following command:
-
-```shell
-# 1. generate a proxmox vma image file
-nom build .#aquamarine  # `nom`(nix-output-monitor) can be replaced by the standard command `nix`
-
-# 2. upload the genereated image to proxmox server's backup directory `/var/lib/vz/dump`
-#    please replace the vma file name with the one you generated in step 1.
-scp result/vzdump-qemu-aquamarine-nixos-23.11.20230603.dd49825.vma.zst root@192.168.5.174:/var/lib/vz/dump
-
-# 3. the image we uploaded will be listed in proxmox web ui's this page: [storage 'local'] -> [backups], we can restore a vm from it via the web ui now.
-```
-
-Once the virtual machine `aquamarine` is created, we can deploy updates to it with the following commands:
-
-```shell
-# 1. add the ssh key to ssh-agent
-ssh-add ~/.ssh/ai-idols
-
-# 2. deploy the configuration to all the remote host with tag `@dist-build`
-# using the ssh key we added in step 1
-colmena apply --on '@dist-build' --show-trace
-```
-
-If you're not familiar with remote deployment, please read this tutorial first: [Remote Deployment - NixOS & Flakes Book](https://nixos-and-flakes.thiscute.world/best-practices/remote-deployment)
+> [What y'all will need when Nix drives you to drink.](https://www.youtube.com/watch?v=Eni9PPPPBpg)
+> (copy from hlissner's dotfiles, it really matches my feelings when I first started using NixOS...)

 ## References

@@ -162,16 +168,22 @@ Other dotfiles that inspired me:
  - [davidtwco/veritas](https://github.com/davidtwco/veritas)
  - [gvolpe/nix-config](https://github.com/gvolpe/nix-config)
  - [Ruixi-rebirth/flakes](https://github.com/Ruixi-rebirth/flakes)
-  - [fufexan/dotfiles](https://github.com/fufexan/dotfiles): gtk theme, xdg, git, media, anyrun, etc.
+  - [fufexan/dotfiles](https://github.com/fufexan/dotfiles): gtk theme, xdg, git, media, anyrun,
+    etc.
+  - [nix-community/srvos](https://github.com/nix-community/srvos): a collection of opinionated and
+    sharable NixOS configurations for servers
 - Modularized NixOS Configuration
  - [hlissner/dotfiles](https://github.com/hlissner/dotfiles)
  - [viperML/dotfiles](https://github.com/viperML/dotfiles)
 - Hyprland(wayland)
-  - [notwidow/hyprland](https://github.com/notwidow/hyprland): This is where I start my hyprland journey.
-  - [HeinzDev/Hyprland-dotfiles](https://github.com/HeinzDev/Hyprland-dotfiles): Refer to the waybar configuration here.
+  - [notwidow/hyprland](https://github.com/notwidow/hyprland): This is where I start my hyprland
+    journey.
+  - [HeinzDev/Hyprland-dotfiles](https://github.com/HeinzDev/Hyprland-dotfiles): Refer to the waybar
+    configuration here.
  - [linuxmobile/kaku](https://github.com/linuxmobile/kaku)
 - I3 Window Manager
-  - [endeavouros-i3wm-setup](https://github.com/endeavouros-team/endeavouros-i3wm-setup): I started using i3 here, and my i3 configuration is also based on it, but made a lot of changes.
+  - [endeavouros-i3wm-setup](https://github.com/endeavouros-team/endeavouros-i3wm-setup): I started
+    using i3 here, and my i3 configuration is also based on it, but made a lot of changes.
  - [denisse-dev/dotfiles](https://github.com/denisse-dev/dotfiles)
 - Neovim/AstroNvim
  - [maxbrunet/dotfiles](https://github.com/maxbrunet/dotfiles): astronvim with nix flakes.
@@ -197,6 +209,7 @@ Other dotfiles that inspired me:
 [DoomEmacs]: https://github.com/doomemacs/doomemacs
 [flameshot]: https://github.com/flameshot-org/flameshot
 [grim]: https://github.com/emersion/grim
+[flameshot]: https://github.com/flameshot-org/flameshot
 [imv]: https://sr.ht/~exec64/imv/
 [OBS]: https://obsproject.com
 [Mako]: https://github.com/emersion/mako
@@ -0,0 +1,20 @@
+## How to create & managage KubeVirt's Virtual Machine from this flake?
+
+Use `aquamarine` as an example, we can create a virtual machine with the following command:
+
+```shell
+just upload-vm aquamarine
+```
+
+Then create the virtual machine by creating a yaml file at
+[ryan4yin/k8s-gitops](https://github.com/ryan4yin/k8s-gitops/tree/main/vms)
+
+Once the virtual machine `aquamarine` is created, we can deploy updates to it with the following
+commands:
+
+```shell
+just col aquamarine
+```
+
+If you're not familiar with remote deployment, please read this tutorial first:
+[Remote Deployment - NixOS & Flakes Book](https://nixos-and-flakes.thiscute.world/best-practices/remote-deployment)
@@ -1,17 +0,0 @@
-rec {
-  # user information
-  username = "ryan";
-  userfullname = "Ryan Yin";
-  useremail = "xiaoyin_c@qq.com";
-
-  allSystemAttrs = {
-    # linux systems
-    x64_system = "x86_64-linux";
-    riscv64_system = "riscv64-linux";
-    aarch64_system = "aarch64-linux";
-    #darwin systems
-    x64_darwin = "x86_64-darwin";
-    aarch64_darwin = "aarch64-darwin";
-  };
-  allSystems = builtins.attrValues allSystemAttrs;
-}
@@ -1,5 +1,5 @@
 {
-  description = "NixOS & macOS configuration of Ryan Yin";
+  description = "Ryan Yin's nix configuration for both NixOS & macOS";

  ##################################################################################################################
  #
@@ -8,64 +8,7 @@
  #
  ##################################################################################################################

-  # The `outputs` function will return all the build results of the flake.
-  # A flake can have many use cases and different types of outputs,
-  # parameters in `outputs` are defined in `inputs` and can be referenced by their names.
-  # However, `self` is an exception, this special parameter points to the `outputs` itself (self-reference)
-  # The `@` syntax here is used to alias the attribute set of the inputs's parameter, making it convenient to use inside the function.
-  outputs = inputs @ {
-    self,
-    nixpkgs,
-    pre-commit-hooks,
-    ...
-  }: let
-    constants = import ./constants.nix;
-
-    # `lib.genAttrs [ "foo" "bar" ] (name: "x_" + name)` => `{ foo = "x_foo"; bar = "x_bar"; }`
-    forEachSystem = func: (nixpkgs.lib.genAttrs constants.allSystems func);
-
-    allSystemConfigurations = import ./systems {inherit self inputs constants;};
-  in
-    allSystemConfigurations
-    // {
-      # format the nix code in this flake
-      # alejandra is a nix formatter with a beautiful output
-      formatter = forEachSystem (
-        system: nixpkgs.legacyPackages.${system}.alejandra
-      );
-
-      # pre-commit hooks for nix code
-      checks = forEachSystem (
-        system: {
-          pre-commit-check = pre-commit-hooks.lib.${system}.run {
-            src = ./.;
-            hooks = {
-              alejandra.enable = true; # formatter
-              # deadnix.enable = true; # detect unused variable bindings in `*.nix`
-              statix.enable = true; # lints and suggestions for Nix code(auto suggestions)
-              prettier = {
-                enable = true;
-                excludes = [".js" ".md" ".ts"];
-              };
-            };
-          };
-        }
-      );
-      devShells = forEachSystem (
-        system: {
-          default = nixpkgs.legacyPackages.${system}.mkShell {
-            packages = [
-              # fix https://discourse.nixos.org/t/non-interactive-bash-errors-from-flake-nix-mkshell/33310
-              nixpkgs.legacyPackages.${system}.bashInteractive
-            ];
-            name = "dots";
-            shellHook = ''
-              ${self.checks.${system}.pre-commit-check.shellHook}
-            '';
-          };
-        }
-      );
-    };
+  outputs = inputs: import ./outputs inputs;

  # the nixConfig here only affects the flake itself, not the system configuration!
  # for more information, see:
@@ -75,11 +18,13 @@
    extra-substituters = [
      "https://anyrun.cachix.org"
      "https://hyprland.cachix.org"
+      "https://nix-gaming.cachix.org"
      # "https://nixpkgs-wayland.cachix.org"
    ];
    extra-trusted-public-keys = [
      "anyrun.cachix.org-1:pqBobmOjI7nKlsUMV25u9QHa9btJK65/C8vnO3p346s="
      "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
+      "nix-gaming.cachix.org-1:nbjlureqMbRAxR1gJ/f3hxemL9svXaZF/Ees8vCUUs4="
      # "nixpkgs-wayland.cachix.org-1:3lwxaILxMRkVhehr5StQprHdEo4IrE8sRho9R9HOLYA="
    ];
  };
@@ -90,10 +35,10 @@
    # There are many ways to reference flake inputs. The most widely used is github:owner/name/reference,
    # which represents the GitHub repository URL + branch/commit-id/tag.

-    # Official NixOS package source, using nixos's stable branch by default
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11";
-    # nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    # Official NixOS package source, using nixos's unstable branch by default
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-23.11";

    # for macos
    nixpkgs-darwin.url = "github:nixos/nixpkgs/nixpkgs-23.11-darwin";
@@ -105,8 +50,8 @@

    # home-manager, used for managing user configuration
    home-manager = {
-      url = "github:nix-community/home-manager/release-23.11";
-      # url = "github:nix-community/home-manager/master";
+      # url = "github:nix-community/home-manager/release-23.11";
+      url = "github:nix-community/home-manager/master";

      # The `follows` keyword in inputs is used for inheritance.
      # Here, `inputs.nixpkgs` of home-manager is kept consistent with the `inputs.nixpkgs` of the current flake,
@@ -141,10 +86,17 @@
    };
    # secrets management
    agenix = {
-      # lock with git commit at 0.14.0
-      url = "github:ryantm/agenix/54693c91d923fecb4cf04c4535e3d84f8dec7919";
+      # lock with git commit at 0.15.0
+      # url = "github:ryantm/agenix/564595d0ad4be7277e07fa63b5a991b3c645655d";
      # replaced with a type-safe reimplementation to get a better error message and less bugs.
-      # url = "github:ryan4yin/ragenix";
+      url = "github:ryan4yin/ragenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    nix-gaming.url = "github:fufexan/nix-gaming";
+
+    disko = {
+      url = "github:nix-community/disko";
      inputs.nixpkgs.follows = "nixpkgs";
    };

@@ -156,11 +108,26 @@

    nuenv.url = "github:DeterminateSystems/nuenv";

+    daeuniverse.url = "github:daeuniverse/flake.nix";
+    # daeuniverse.url = "github:daeuniverse/flake.nix/exp";
+
+    attic.url = "github:zhaofengli/attic";
+
+    haumea = {
+      url = "github:nix-community/haumea/v0.2.2";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    microvm = {
+      url = "github:astro/microvm.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
    ########################  Some non-flake repositories  #########################################

    # AstroNvim is an aesthetic and feature-rich neovim config.
    astronvim = {
-      url = "github:AstroNvim/AstroNvim/v3.40.3";
+      url = "github:AstroNvim/AstroNvim/v3.41.2";
      flake = false;
    };
    # doom-emacs is a configuration framework for GNU Emacs.
@@ -3,4 +3,3 @@
 1. `base`: The base module that is suitable for both Linux and macOS.
 2. `linux`: Linux-specific configuration.
 3. `darwin`: macOS-specific configuration.
-
@@ -2,5 +2,4 @@

 1. `server`: Configuration which is suitable for both servers and desktops.
 1. `desktop`: Configuration for desktop environments, such as Hyprland, I3, etc.
-1. `base.nix`: Common configuration for both servers and desktops.
-
+1. `core.nix`: Minimal home-manager's config
@@ -1,17 +1,32 @@
 {
  pkgs,
+  pkgs-unstable,
  nur-ryan4yin,
  ...
 }: {
  home.packages = with pkgs; [
+    skopeo
+    docker-compose
+    dive # explore docker layers
+    lazydocker # Docker terminal UI.
+
    kubectl
+    istioctl
+    kubevirt # virtctl
    kubernetes-helm
+    fluxcd
+    argocd
  ];

  programs = {
    k9s = {
      enable = true;
-      skin = let
+      # https://k9scli.io/topics/aliases/
+      # aliases = {};
+      settings = {
+        skin = "catppuccino-mocha";
+      };
+      skins.catppuccin-mocha = let
        skin_file = "${nur-ryan4yin.packages.${pkgs.system}.catppuccin-k9s}/dist/mocha.yml"; # theme - catppuccin mocha
        skin_attr = builtins.fromJSON (
          builtins.readFile
@@ -0,0 +1,142 @@
+{
+  pkgs,
+  attic,
+  nur-ryan4yin,
+  ...
+}: {
+  home.packages = with pkgs; [
+    # Misc
+    tldr
+    cowsay
+    gnupg
+    gnumake
+
+    # Morden cli tools, replacement of grep/sed/...
+
+    # Interactively filter its input using fuzzy searching, not limit to filenames.
+    fzf
+    # search for files by name, faster than find
+    fd
+    # search for files by its content, replacement of grep
+    (ripgrep.override {withPCRE2 = true;})
+
+    # A fast and polyglot tool for code searching, linting, rewriting at large scale
+    # supported languages: only some mainstream languages currently(do not support nix/nginx/yaml/toml/...)
+    ast-grep
+
+    sad # CLI search and replace, just like sed, but with diff preview.
+    yq-go # yaml processer https://github.com/mikefarah/yq
+    just # a command runner like make, but simpler
+    delta # A viewer for git and diff output
+    lazygit # Git terminal UI.
+    hyperfine # command-line benchmarking tool
+    gping # ping, but with a graph(TUI)
+    doggo # DNS client for humans
+    duf # Disk Usage/Free Utility - a better 'df' alternative
+    du-dust # A more intuitive version of `du` in rust
+    gdu # disk usage analyzer(replacement of `du`)
+
+    # nix related
+    #
+    # it provides the command `nom` works just like `nix
+    # with more details log output
+    nix-output-monitor
+    hydra-check # check hydra(nix's build farm) for the build status of a package
+    nix-index # A small utility to index nix store paths
+    nix-init # generate nix derivation from url
+    # https://github.com/nix-community/nix-melt
+    nix-melt # A TUI flake.lock viewer
+    # https://github.com/utdemir/nix-tree
+    nix-tree # A TUI to visualize the dependency graph of a nix derivation
+
+    # productivity
+    caddy # A webserver with automatic HTTPS via Let's Encrypt(replacement of nginx)
+    croc # File transfer between computers securely and easily
+    # self-hosted nix cache server
+    attic.packages.${pkgs.system}.attic-client
+    ncdu # analyzer your disk usage Interactively, via TUI(replacement of `du`)
+  ];
+
+  programs = {
+    # A modern replacement for ‘ls’
+    # useful in bash/zsh prompt, not in nushell.
+    eza = {
+      enable = true;
+      enableAliases = false; # do not enable aliases in nushell!
+      git = true;
+      icons = true;
+    };
+
+    # a cat(1) clone with syntax highlighting and Git integration.
+    bat = {
+      enable = true;
+      config = {
+        pager = "less -FR";
+        theme = "catppuccin-mocha";
+      };
+      themes = {
+        # https://raw.githubusercontent.com/catppuccin/bat/main/Catppuccin-mocha.tmTheme
+        catppuccin-mocha = {
+          src = nur-ryan4yin.packages.${pkgs.system}.catppuccin-bat;
+          file = "Catppuccin-mocha.tmTheme";
+        };
+      };
+    };
+
+    # A command-line fuzzy finder
+    fzf = {
+      enable = true;
+      # https://github.com/catppuccin/fzf
+      # catppuccin-mocha
+      colors = {
+        "bg+" = "#313244";
+        "bg" = "#1e1e2e";
+        "spinner" = "#f5e0dc";
+        "hl" = "#f38ba8";
+        "fg" = "#cdd6f4";
+        "header" = "#f38ba8";
+        "info" = "#cba6f7";
+        "pointer" = "#f5e0dc";
+        "marker" = "#f5e0dc";
+        "fg+" = "#cdd6f4";
+        "prompt" = "#cba6f7";
+        "hl+" = "#f38ba8";
+      };
+    };
+
+    # zoxide is a smarter cd command, inspired by z and autojump.
+    # It remembers which directories you use most frequently,
+    # so you can "jump" to them in just a few keystrokes.
+    # zoxide works on all major shells.
+    #
+    #   z foo              # cd into highest ranked directory matching foo
+    #   z foo bar          # cd into highest ranked directory matching foo and bar
+    #   z foo /            # cd into a subdirectory starting with foo
+    #
+    #   z ~/foo            # z also works like a regular cd command
+    #   z foo/             # cd into relative path
+    #   z ..               # cd one level up
+    #   z -                # cd into previous directory
+    #
+    #   zi foo             # cd with interactive selection (using fzf)
+    #
+    #   z foo<SPACE><TAB>  # show interactive completions (zoxide v0.8.0+, bash 4.4+/fish/zsh only)
+    zoxide = {
+      enable = true;
+      enableBashIntegration = true;
+      enableZshIntegration = true;
+      enableNushellIntegration = true;
+    };
+
+    # Atuin replaces your existing shell history with a SQLite database,
+    # and records additional context for your commands.
+    # Additionally, it provides optional and fully encrypted
+    # synchronisation of your history between machines, via an Atuin server.
+    atuin = {
+      enable = true;
+      enableBashIntegration = true;
+      enableZshIntegration = true;
+      enableNushellIntegration = true;
+    };
+  };
+}
@@ -1,4 +1,3 @@
 # Editors

 See [desktop/editors/](../../desktop/editors/) for more details.
-
@@ -2,8 +2,7 @@
  config,
  lib,
  pkgs,
-  userfullname,
-  useremail,
+  myvars,
  ...
 }: {
  # `programs.git` will generate the config file: ~/.config/git/config
@@ -21,8 +20,8 @@
    enable = true;
    lfs.enable = true;

-    userName = userfullname;
-    userEmail = useremail;
+    userName = myvars.userfullname;
+    userEmail = myvars.useremail;

    includes = [
      {
@@ -0,0 +1,13 @@
+_: {
+  # use mirror for pip install
+  xdg.configFile."pip/pip.conf".text = ''
+    [global]
+    index-url = https://mirrors.ustc.edu.cn/pypi/web/simple
+    format = columns
+  '';
+
+  # xdg.configFile."pip/pip.conf".text = ''
+  #   [global]
+  #   index-url = https://mirrors.bfsu.edu.cn/pypi/web/simple
+  # '';
+}
@@ -12,7 +12,7 @@ in {
  programs.nushell = {
    enable = true;
    configFile.source = ./config.nu;
-    shellAliases = shellAliases;
+    inherit shellAliases;
  };

  programs.bash = {
@@ -1,28 +0,0 @@
-{pkgs, ...}: {
-  home.packages = with pkgs;
-    [
-      # general tools
-      pulumi
-      pulumictl
-      packer # machine image builder
-
-      # aws
-      awscli2
-      ssm-session-manager-plugin # Amazon SSM Session Manager Plugin
-      aws-iam-authenticator
-      eksctl
-      istioctl
-
-      # aliyun
-      aliyun-cli
-    ]
-    ++ (
-      if pkgs.stdenv.isLinux
-      then [
-        # cloud tools that nix do not have cache for.
-        terraform
-        terraformer # generate terraform configs from existing cloud resources
-      ]
-      else []
-    );
-}
@@ -1,14 +0,0 @@
-{
-  pkgs,
-  pkgs-unstable,
-  ...
-}: {
-  home.packages = with pkgs; [
-    skopeo
-    docker-compose
-    dive # explore docker layers
-  ];
-
-  programs = {
-  };
-}
@@ -1,71 +0,0 @@
-{
-  pkgs,
-  pkgs-unstable,
-  ...
-}: {
-  #############################################################
-  #
-  #  Basic settings for development environment
-  #
-  #  Please avoid to install language specific packages here(globally),
-  #  instead, install them:
-  #     1. per IDE, such as `programs.neovim.extraPackages`
-  #     2. per-project, using https://github.com/the-nix-way/dev-templates
-  #
-  #############################################################
-
-  home.packages = with pkgs;
-    [
-      # db related
-      dbeaver
-      mycli
-      pgcli
-      mongosh
-      sqlite
-
-      # embedded development
-      minicom
-
-      # ai related
-      python311Packages.huggingface-hub # huggingface-cli
-
-      # misc
-      pkgs-unstable.devbox
-      glow # markdown previewer
-      fzf
-      gdu # disk usage analyzer, required by AstroNvim
-      bfg-repo-cleaner # remove large files from git history
-      k6 # load testing tool
-      protobuf # protocol buffer compiler
-      nix-init # generate nix package from url
-    ]
-    ++ (
-      if pkgs.stdenv.isLinux
-      then [
-        # Automatically trims your branches whose tracking remote refs are merged or gone
-        # It's really useful when you work on a project for a long time.
-        git-trim
-
-        # need to run `conda-install` before using it
-        # need to run `conda-shell` before using command `conda`
-        # conda is not available for MacOS
-        conda
-
-        mitmproxy # http/https proxy tool
-        insomnia # REST client
-        wireshark # network analyzer
-      ]
-      else []
-    );
-
-  programs = {
-    direnv = {
-      enable = true;
-      nix-direnv.enable = true;
-
-      enableZshIntegration = true;
-      enableBashIntegration = true;
-      enableNushellIntegration = true;
-    };
-  };
-}
@@ -1,150 +0,0 @@
-# Editors
-
-My editors:
-
-1. Neovim
-2. Emacs
-3. Helix
-
-And `Zellij` for a smooth and stable terminal experience.
-
-## Tutorial
-
-Type `:tutor`(`:Tutor` in Neovim) to learn the basics usage of vim/neovim.
-
-## VIM's Cheetsheet
-
-> Here only record my commonly used keyboard keys, to see **a more comprehensive cheetsheet**: <https://github.com/rtorr/vim-cheat-sheet>
-
-Both Emacs-Evil & Neovim are compatible with vim, sothe key-bindings described here are common in both Emacs-Evil, Neovim & vim.
-
-### Terminal Related
-
-I mainly use Zellij for terminal related operations, here is its terminal shortcuts I use frequently now:
-
-| Action                    | Zellij's Shortcut |
-| ------------------------- | ----------------- |
-| Floating Terminal         | `Ctrl + p + w`    |
-| Horizontal Split Terminal | `Ctrl + p + d`    |
-| Vertical Split Terminal   | `Ctrl + p + n`    |
-
-### File Management
-
-| Action                            |                                              |
-| --------------------------------- | -------------------------------------------- |
-| Save selected text to a file      | `:w filename` (Will show `:'<,'>w filename`) |
-| Save and close the current buffer | `:wq`                                        |
-| Save all buffers                  | `:wa`                                        |
-| Save and close all buffers        | `:wqa`                                       |
-
-### Text Manipulation
-
-Basics:
-
-| Action                                              |                                |
-| --------------------------------------------------- | ------------------------------ |
-| Move to the start/end of the buffer                 | `gg`/`G`                       |
-| Move the line number 5                              | `5gg` / `5G`                   |
-| Move left/down/up/right                             | h/j/k/l or `5h`/`5j`/`5k`/`5l` |
-| Move to the matchpairs, default to `()`, `{}`, `[]` | `%`                            |
-| Delete the current character                        | `x`                            |
-| Delete the selection                                | `d`                            |
-| Undo the last change                                | `u`                            |
-| Redo the last change                                | `Ctrl + r`                     |
-
-Convert Text Cases:
-
-| Toggle text's case | `~` |
-| Convert to uppercase | `U` |
-| Convert to lowercase | `u` |
-
-Misc:
-
-| Action                        | Shortcut                                 |
-| ----------------------------- | ---------------------------------------- |
-| Toggle visual mode            | `v` (lower case v)                       |
-| Select the current line       | `V` (upper case v)                       |
-| Toggle visual block mode      | `<Ctrl> + v` (select a block vertically) |
-| Fold the current code block   | `zc`                                     |
-| Unfold the current code block | `zo`                                     |
-| Jump to Definition            | `gd`                                     |
-| Jump to References            | `gD`                                     |
-| (Un)Comment the current line  | `gcc`                                    |
-
-| Action                                                                    |                |
-| ------------------------------------------------------------------------- | -------------- |
-| Join Selection of Lines With Space                                        | `:join` or `J` |
-| Join without spaces                                                       | `:join!`       |
-| Move to the start/end of the line                                         | `0` / `$`      |
-| Enter Insert mode at the start/end of the line                            | `I` / `A`      |
-| Delete from the cursor to the end of the line                             | `D`            |
-| Delete from the cursor to the end of the line, and then enter insert mode | `C`            |
-
-Advance Techs:
-
- Add at the end of multiple lines: `:normal A<text>`
-
-  - Execublock: `:A<text>`
-  - visual block mode(ctrl + v)
-  - Append text at the end of each line in the selected block
-  - If position exceeds line end, neovim adds spaces automatically
-
- Delete the last char of multivle lines: `:normal $x`
-
-  - Execute `$x` on each line
-  - visual mode(v)
-  - `$` moves cursor to the end of line
-  - `x` deletes the character under the cursor
-
- Delete the last word of multiple lines: `:normal $bD`
-  - Execute `$bD` on each line
-  - visual mode(v)
-  - `$` moves cursor to the end of line
-  - `b` moves cursor to the beginning of the last word
-
-### Search
-
-| Action                                                | Command   |
-| ----------------------------------------------------- | --------- |
-| Search forward/backword for a pattern                 | `/` / `?` |
-| Repeat the last search in the same/opposite direction | `n` / `N` |
-
-### Find and Replace
-
-| Action                   | Command                             |
-| ------------------------ | ----------------------------------- |
-| Replace in selected area | `:s/old/new/g`                      |
-| Replace in current line  | Same as above                       |
-| Replace in whole file    | `:% s/old/new/g`                    |
-| Replace with regex       | `:% s@\vhttp://(\w+)@https://\1@gc` |
-
-1. `\v` means means that in the regex pattern after it can be used without backslash escaping(similar to python's raw string).
-2. `\1` means the first matched group in the pattern.
-
-### Replace in the specific lines
-
-| Action                                    | Command                                |
-| ----------------------------------------- | -------------------------------------- |
-| From the 10th line to the end of the file | `:10,$ s/old/new/g` or `:10,$ s@^@#@g` |
-| From the 10th line to the 20th line       | `:10,20 s/old/new/g`                   |
-
-The postfix(flags) in the above commands:
-
-1. `g` means replace all the matched strings in the current line/file.
-2. `c` means ask for confirmation before replacing.
-3. `i` means ignore case.
-
-### Buffers, Windows and Tabs
-
- A buffer is the in-memory text of a file.
- A window is a viewport on a buffer.
- A tab page is a collection of windows.
-
-| Action                              | Command                             |
-| ----------------------------------- | ----------------------------------- |
-| Show all buffers                    | `:ls`                               |
-| show next/previous buffer           | `]b`/`[b` or `:bn[ext]` / `bp[rev]` |
-| Split the window horizontally       | `:sp[lit]`                               |
-| Split the window horizontally       | `:vs[plit]`                              |
-| New Tab(New Workspace in DoomEmacs) | `:tabnew`                           |
-| Next/Previews Tab                   | `gt`/`gT`                           |
@@ -1,24 +0,0 @@
-# Structured Editing
-
-## S-expression data(Lisp)
-
- paredit/[lispy](https://github.com/doomemacs/doomemacs/tree/master/modules/editor/lispy): too complex.
- [evil-cleverparens](https://github.com/emacs-evil/evil-cleverparens): simple and useful.
- [parinfer(par-in-fer)](https://shaunlebron.github.io/parinfer/): morden, simple, elegant and useful, but works not well with some other completion plugins...
-    - to make parinfer works, you should disable sexp & smartparens in any lisp mode.
-
-Some plugins:
-
- Emacs
-    - [parinfer-rust-mode](https://github.com/justinbarclay/parinfer-rust-mode)
- Neovim
-    - [parinfer-rust](https://github.com/eraserhd/parinfer-rust)
-    - <https://github.com/Olical/conjure>
- Helix
-    - [parinfer #4090 - Helix](https://github.com/helix-editor/helix/discussions/4090)
-
-## Other Languages
-
-1. treesitter
-1. ...
-
@@ -1,10 +0,0 @@
-{
-  "name": "nil",
-  "languageId": "nix",
-  "command": ["nil"],
-  "settings": {
-    "nil": {
-      "formatting": { "command": ["alejandra"] }
-    }
-  }
-}
@@ -1,29 +0,0 @@
-# Helix Editor
-
-Neovim is really powerful, and have a very active community. I use it as my main editor, and I'm very happy with it. I use it for everything, from writing code to writing this document.
-
-But its configuration is a bit complex, and finding the right plugins, writing configurations, and keeping everything up to date is not easy.
-
-That's why I'm interested in Helix, Helix is similar to Neovim, but it's more opinionated, and it's batteries included.
-Whether I'll switch my main editor to Helix or not, it gives me a lot of ideas on how to improve my Neovim workflow.
-
-## Differences between Neovim and Helixer
-
-1. Neovim have a very activate plugin ecosystem, and it's easy to find plugins for almost everything.
-    1. Helix is still new, and it even do have a stable plugin system yet. A PR to add a plugin system is still envolving: <https://github.com/helix-editor/helix/pull/8675>
-2. Neovim has intergrated terminal, and it's very powerful. It's quite similar to VSCode's intergrated terminal. I use it a lot.
-    1. Helix doesn't have a intergrated terminal yet, as it's complicated to implement. Users are recommended to use tmux/Zellij or Wezterm/Kitty to implement this feature instead.
-    1. <https://github.com/helix-editor/helix/issues/1976#issuecomment-1091074719>
-    1. <https://github.com/helix-editor/helix/pull/4649>
-    1. **My Neovim often gets stuck when I switch to [toggleterm.nvim](https://github.com/akinsho/toggleterm.nvim), this Helix issue made me consider to switch from this Neovim plugin to Zellij**.
-1. Helix do not have a tree-view panel, it's recommended to use Yazi/ranger/Broot instead, and open Helix in them.
-    1. a tree-view plugin may be added after the plugin system is stable, but no one knows when it will be.
-    2. and some Helix users stated that they don't need a tree-view plugin, Helix's file picker is useful and good enough.
-1. It seems Helix lacks a substitution command, you should run it in another window(via wm or Zellij).
-    1. Neovim's substitution command allow you to preview the changes before you apply it, and it's very useful. if I switch to Helix, I'll need to find some other tools with similar feature(such as https://github.com/ms-jpq/sad).
-    2. The downside of Neovim's substitution command is that it's unable to save the command we just typed. If I made some things wrong, I have to type the whole substitution command again.
-
-I think Use Helix/Neovim within a terminal file manager(Yazi/ranger/Broot) and Zellij is a good idea. 
-It's quite different from the workflow I migrated from VSCode/JetBrains before, I'm very interested in it.
-
-In Neovim I can make the workflow similar to VSCode/JetBrains by using some plugins, but Helix forces me to get out of my comfort zone, and try something new.
@@ -1,130 +0,0 @@
-{pkgs, ...}: {
-  home.packages = with pkgs;
-    [
-      #-- c/c++
-      cmake
-      cmake-language-server
-      gnumake
-      checkmake
-      llvmPackages.clang-unwrapped # c/c++ tools with clang-tools such as clanvimPlugins.nvim-treesitter-parsers.vuegd
-      lldb
-      # c/c++ compiler, required by nvim-treesitter!
-      # gcc has to be installed after clang, so that `cc` will be gcc instead of clang(on macOS)
-      gcc
-
-      #-- python
-      nodePackages.pyright # python language server
-      (python310.withPackages (
-        ps:
-          with ps; [
-            ruff-lsp
-            black # python formatter
-
-            ipython
-            pandas
-            requests
-            pyquery
-            pyyaml
-
-            ## emacs's lsp-bridge dependenciesge
-            epc
-            orjson
-            sexpdata
-            six
-            setuptools
-            paramiko
-            rapidfuzz
-          ]
-      ))
-
-      #-- rust
-      rust-analyzer
-      cargo # rust package manager
-      rustfmt
-
-      #-- zig
-      zls
-
-      #-- nix
-      nil
-      rnix-lsp
-      # nixd
-      statix # Lints and suggestions for the nix programming language
-      deadnix # Find and remove unused code in .nix source files
-      alejandra # Nix Code Formatter
-
-      #-- golang
-      go
-      gomodifytags
-      iferr # generate error handling code for go
-      impl # generate function implementation for go
-      gotools # contains tools like: godoc, goimports, etc.
-      gopls # go language server
-      delve # go debugger
-
-      # -- java
-      jdk17
-      gradle
-      maven
-      spring-boot-cli
-
-      #-- lua
-      stylua
-      lua-language-server
-
-      #-- bash
-      nodePackages.bash-language-server
-      shellcheck
-      shfmt
-
-      #-- javascript/typescript --#
-      nodePackages.nodejs
-      nodePackages.typescript
-      nodePackages.typescript-language-server
-      # HTML/CSS/JSON/ESLint language servers extracted from vscode
-      nodePackages.vscode-langservers-extracted
-      nodePackages."@tailwindcss/language-server"
-      emmet-ls
-
-      #-- CloudNative
-      nodePackages.dockerfile-language-server-nodejs
-      # terraform  # install via brew on macOS
-      terraform-ls
-      jsonnet
-      jsonnet-language-server
-      hadolint # Dockerfile linter
-
-      # -- Lisp like Languages
-      guile
-      racket-minimal
-      fnlfmt # fennel
-
-      #-- Others
-      taplo # TOML language server / formatter / validator
-      nodePackages.yaml-language-server
-      sqlfluff # SQL linter
-      actionlint # GitHub Actions linter
-      buf # protoc plugin for linting and formatting
-      proselint # English prose linter
-
-      #-- Misc
-      tree-sitter # common language parser/highlighter
-      nodePackages.prettier # common code formatter
-      marksman # language server for markdown
-      glow # markdown previewer
-      fzf
-
-      #-- Optional Requirements:
-      gdu # disk usage analyzer, required by AstroNvim
-      (ripgrep.override {withPCRE2 = true;}) # recursively searches directories for a regex pattern
-    ]
-    ++ (
-      if pkgs.stdenv.isDarwin
-      then []
-      else [
-        #-- verilog / systemverilog
-        verible
-        gdb
-      ]
-    );
-}
@@ -1,73 +0,0 @@
-# Termianl Emulators
-
-I used to spend a lot of time on terminal emulators, to make them match my taste, 
-but now I found that it's not worth it, **Zellij can provide a user-friendly and unified user experience for all terminal emulators! without any pain**!
-
-Currently, I only use the most basic features of terminal emulators, such as true color, graphics protocol, etc.
-Other features such as tabs, scrollback buffer, select/search/copy, etc, are all provided by zellij!
-
-My current terminal emulators are:
-
-1. kitty: My main terminal emulator.
-    1. to select/copy a large mount of text, We should do some tricks via kitty's `scrollback_pager` with neovim, it's really painful: <https://github.com/kovidgoyal/kitty/issues/719>
-2. wezterm: My secondary terminal emulator.
-    1. its search ability is very basic, and it's not easy to use.
-    1. its scrollback buffer's copy mode is very like vim, which is nice, but zellij's even better, it can use neovim as its default scrollback buffer's editor without any pain!
-3. foot: a fast, lightweight and minimalistic Wayland terminal emulator.
-    1. foot only do the things a terminal emulator should do, no more, no less.
-    1. It's really suitable for tiling window manager or zellij users!
-
-## 'xterm-kitty': unknown terminal type when `ssh` into a remote host or `sudo xxx`
-
-> https://sw.kovidgoyal.net/kitty/faq/#i-get-errors-about-the-terminal-being-unknown-or-opening-the-terminal-failing-or-functional-keys-like-arrow-keys-don-t-work
-
-> https://wezfurlong.org/wezterm/config/lua/config/term.html
-
-kitty set `TERM` to `xterm-kitty` by default, and TUI apps like `viu`, `yazi`, `curses` will try to search in the host's [terminfo(terminal capability data base)](https://linux.die.net/man/5/terminfo) for value of `TERM` to determine the capabilities of the terminal.
-
-But when you `ssh` into a remote host, the remote host is very likely to not have `xterm-kitty` in its terminfo, so you will get this error:
-
-```
-'xterm-kitty': unknown terminal type
-```
-
-Or when you `sudo xxx`, `sudo` won't preserve the `TERM` variable, it will be reset to root's default `TERM` value, which is `xterm` or `xterm-256color` in most linux distributions, so you will get this error:
-
-```
-'xterm-256color': unknown terminal type
-```
-
-or 
-
-```
-Error opening terminal: xterm-kitty.
-```
-
-NixOS preserve the `TERMINFO` and `TERMINFO_DIRS` environment variables, for `root` and the `wheel` group: [nixpkgs/nixos/modules/config/terminfo.nix](https://github.com/NixOS/nixpkgs/blob/nixos-23.11/nixos/modules/config/terminfo.nix#L18)
-
-For nix-darwin, take a look at <https://github.com/LnL7/nix-darwin/wiki/Terminfo-issues>
-
-### Solutions
-
-Simplest solution, it will automatically copy over the terminfo files and also magically enable shell integration on the remote machine: 
-
-```
-kitten ssh user@host
-```
-
-Or if you do not care about kitty's features(such as true color & graphics protocol), you can simply set `TERM` to `xterm-256color`, which is built-in in most linux distributions:
-
-```
-export TERM=xterm-256color
-```
-
-If you need kitty's features, but do not like the magic of `kitten`, you can manually install kitty's terminfo on the remote host:
-
-```bash
-# install on ubuntu / debian
-sudo apt-get install kitty-terminfo
-
-# or copy from local machine
-infocmp -a xterm-kitty | ssh myserver tic -x -o \~/.terminfo /dev/stdin
-```
-
@@ -1,110 +0,0 @@
-{pkgs, ...}:
-###########################################################
-#
-# Wezterm Configuration
-#
-# Useful Hot Keys for Linux(replace `ctrl + shift` with `cmd` on macOS)):
-#   1. Increase Font Size: `ctrl + shift + =` | `ctrl + shift + +`
-#   2. Decrease Font Size: `ctrl + shift + -` | `ctrl + shift + _`
-#   3. And Other common shortcuts such as Copy, Paste, Cursor Move, etc.
-#
-# Default Keybindings: https://wezfurlong.org/wezterm/config/default-keys.html
-#
-###########################################################
-{
-  # wezterm has catppuccin theme built-in,
-  # it's not necessary to install it separately.
-
-  # we can add wezterm as a flake input once this PR is merged:
-  #    https://github.com/wez/wezterm/pull/3547
-
-  programs.wezterm =
-    {
-      enable = false; # disable
-
-      # TODO: Fix: https://github.com/wez/wezterm/issues/4483
-      # package = pkgs.wezterm.override { };
-
-      extraConfig = let
-        fontsize =
-          if pkgs.stdenv.isDarwin
-          then "14.0"
-          else "13.0";
-      in ''
-        -- Pull in the wezterm API
-        local wezterm = require 'wezterm'
-
-        -- This table will hold the configuration.
-        local config = {}
-
-        -- In newer versions of wezterm, use the config_builder which will
-        -- help provide clearer error messages
-        if wezterm.config_builder then
-          config = wezterm.config_builder()
-        end
-
-        wezterm.on('toggle-opacity', function(window, pane)
-          local overrides = window:get_config_overrides() or {}
-          if not overrides.window_background_opacity then
-            overrides.window_background_opacity = 0.93
-          else
-            overrides.window_background_opacity = nil
-          end
-          window:set_config_overrides(overrides)
-        end)
-
-        wezterm.on('toggle-maximize', function(window, pane)
-          window:maximize()
-        end)
-
-        -- This is where you actually apply your config choices
-        config.color_scheme = "Catppuccin Mocha"
-        config.font = wezterm.font_with_fallback {
-          "JetBrainsMono Nerd Font",
-          "FiraCode Nerd Font",
-
-          -- To avoid 'Chinese characters displayed as variant (Japanese) glyphs'
-          "Source Han Sans SC",
-          "Source Han Sans TC"
-        }
-
-        config.hide_tab_bar_if_only_one_tab = true
-        config.scrollback_lines = 10000
-        config.enable_scroll_bar = true
-        config.term = 'wezterm'
-
-        config.keys = {
-          -- toggle opacity(CTRL + SHIFT + B)
-          {
-            key = 'B',
-            mods = 'CTRL',
-            action = wezterm.action.EmitEvent 'toggle-opacity',
-          },
-          {
-            key = 'M',
-            mods = 'CTRL',
-            action = wezterm.action.EmitEvent 'toggle-maximize',
-          },
-        }
-        config.font_size = ${fontsize}
-
-        -- To resolve issues:
-        --   1. https://github.com/ryan4yin/nix-config/issues/26
-        --   2. https://github.com/ryan4yin/nix-config/issues/8
-        -- Spawn a nushell in login mode via `bash`
-        config.default_prog = { '${pkgs.bash}/bin/bash', '--login', '-c', 'nu --login --interactive' }
-
-        return config
-      '';
-    }
-    // (
-      if pkgs.stdenv.isDarwin
-      then {
-        # install wezterm via homebrew on macOS to avoid compilation, dummy package here.
-        # package = pkgs.hello;
-        enableBashIntegration = false;
-        enableZshIntegration = false;
-      }
-      else {}
-    );
-}
@@ -1,39 +0,0 @@
-# Zellij - A workspace lives in your terminal
-
-Zellij is a terminal workspace with batteries included.
-At its core, it is a terminal multiplexer (similar to tmux and screen), but this is merely its infrastructure layer.
-
-Zellij is very user-friendly and easy to use, with a step-by-step hint system that will help you get to know the keybindings, which is very like the Neovim or helix.
-
-> By contrast, tmux's key design is counterintuitive, there is no prompt system, and the plug-in performance is rubbish. It's really a pain to use.
-> tmux's inital release was in 2007, it's too old, I would recommend any users that do not have a experience with multiplexer to use zellij instead of tmux.
-
-## Why use zellij as the detault terminal environment?
-
-By auto start zellij on shell login, and exit the shell session on zellij exit, we can use zellij as the default terminal environment.
-
-By this way, We will only use the most basic features of the terminal emulator(kitty/alacritty/wezterm/...),
-while most of the functions of terminal are provided by zellij.
-Thus we can easily switch to any terminal emulator without losing any key functions,
-and do not need to take care of the differences between different terminal emulators.
-
-And Zellij can be used not only locally, but also on any remote server, which is very convenient. Learn once and use everywhere!
-
-> Yeah, you didn't misread it, zellij is very suitable for not only remotely, but also locally!
-
-Some features such as search/copy/scrollback in different terminal emulators are implemented in different ways, and has different user experience.
-For example, Wezterm's default search function is very basic, and it's not easy to use. Kitty's scrollback search/copy is really tricky to use.
-As for some Editor such as Neovim, its intergrated terminal is really useful, but zellij is more powerful and useful than it, and more stable!
-Zellij overcomes these problems, and provides a unified user experience for all terminal emulators!
-
-Teminal emulators should only be responsible for displaying characters.
-
-## Passthrough mode(Lock Mode)
-
-`Ctrl + g` lock the outer zellij interface, and all keys will be sent to the focused pane.
-
-It's extremely useful when you want to:
-
-1. Use zellij locally for daily work, and use a remote zellij via ssh to do some work on the remote server.
-1. To avoid the key conflicts between zellij and the program running in the terminal, such as vim, tmux, etc.
-
@@ -0,0 +1,14 @@
+{
+  pkgs,
+  ...
+}: {
+  home.packages = with pkgs; [
+    # db related
+    dbeaver
+
+    mitmproxy # http/https proxy tool
+    insomnia # REST client
+    wireshark # network analyzer
+    ventoy # create bootable usb
+  ];
+}
@@ -0,0 +1,86 @@
+# Terminal Emulators
+
+I used to spend a lot of time on terminal emulators, to make them match my taste, but now I found
+that it's not worth it, **Zellij can provide a user-friendly and unified user experience for all
+terminal emulators! without any pain**!
+
+Currently, I only use the most basic features of terminal emulators, such as true color, graphics
+protocol, etc. Other features such as tabs, scrollback buffer, select/search/copy, etc, are all
+provided by zellij!
+
+My current terminal emulators are:
+
+1. kitty: My main terminal emulator.
+   1. to select/copy a large mount of text, We should do some tricks via kitty's `scrollback_pager`
+      with neovim, it's really painful: <https://github.com/kovidgoyal/kitty/issues/719>
+2. wezterm: My secondary terminal emulator.
+   1. its search ability is very basic, and it's not easy to use.
+   1. its scrollback buffer's copy mode is very like vim, which is nice, but zellij's even better,
+      it can use neovim as its default scrollback buffer's editor without any pain!
+3. foot: a fast, lightweight and minimalistic Wayland terminal emulator.
+   1. foot only do the things a terminal emulator should do, no more, no less.
+   1. It's really suitable for tiling window manager or zellij users!
+
+## 'xterm-kitty': unknown terminal type when `ssh` into a remote host or `sudo xxx`
+
+> https://sw.kovidgoyal.net/kitty/faq/#i-get-errors-about-the-terminal-being-unknown-or-opening-the-terminal-failing-or-functional-keys-like-arrow-keys-don-t-work
+
+> https://wezfurlong.org/wezterm/config/lua/config/term.html
+
+kitty set `TERM` to `xterm-kitty` by default, and TUI apps like `viu`, `yazi`, `curses` will try to
+search in the host's [terminfo(terminal capability data base)](https://linux.die.net/man/5/terminfo)
+for value of `TERM` to determine the capabilities of the terminal.
+
+But when you `ssh` into a remote host, the remote host is very likely to not have `xterm-kitty` in
+its terminfo, so you will get this error:
+
+```
+'xterm-kitty': unknown terminal type
+```
+
+Or when you `sudo xxx`, `sudo` won't preserve the `TERM` variable, it will be reset to root's
+default `TERM` value, which is `xterm` or `xterm-256color` in most linux distributions, so you will
+get this error:
+
+```
+'xterm-256color': unknown terminal type
+```
+
+or
+
+```
+Error opening terminal: xterm-kitty.
+```
+
+NixOS preserve the `TERMINFO` and `TERMINFO_DIRS` environment variables, for `root` and the `wheel`
+group:
+[nixpkgs/nixos/modules/config/terminfo.nix](https://github.com/NixOS/nixpkgs/blob/nixos-23.11/nixos/modules/config/terminfo.nix#L18)
+
+For nix-darwin, take a look at <https://github.com/LnL7/nix-darwin/wiki/Terminfo-issues>
+
+### Solutions
+
+Simplest solution, it will automatically copy over the terminfo files and also magically enable
+shell integration on the remote machine:
+
+```
+kitten ssh user@host
+```
+
+Or if you do not care about kitty's features(such as true color & graphics protocol), you can simply
+set `TERM` to `xterm-256color`, which is built-in in most linux distributions:
+
+```
+export TERM=xterm-256color
+```
+
+If you need kitty's features, but do not like the magic of `kitten`, you can manually install
+kitty's terminfo on the remote host:
+
+```bash
+# install on ubuntu / debian
+sudo apt-get install kitty-terminfo
+
+# or copy from local machine
+infocmp -a xterm-kitty | ssh myserver tic -x -o \~/.terminfo /dev/stdin
+```
@@ -0,0 +1,105 @@
+{pkgs, ...}:
+###########################################################
+#
+# Wezterm Configuration
+#
+# Useful Hot Keys for Linux(replace `ctrl + shift` with `cmd` on macOS)):
+#   1. Increase Font Size: `ctrl + shift + =` | `ctrl + shift + +`
+#   2. Decrease Font Size: `ctrl + shift + -` | `ctrl + shift + _`
+#   3. And Other common shortcuts such as Copy, Paste, Cursor Move, etc.
+#
+# Default Keybindings: https://wezfurlong.org/wezterm/config/default-keys.html
+#
+###########################################################
+{
+  # wezterm has catppuccin theme built-in,
+  # it's not necessary to install it separately.
+
+  # we can add wezterm as a flake input once this PR is merged:
+  #    https://github.com/wez/wezterm/pull/3547
+
+  programs.wezterm = {
+    enable = true; # disable
+
+    # install wezterm via homebrew on macOS to avoid compilation, dummy package here.
+    package =
+      if pkgs.stdenv.isLinux
+      then pkgs.wezterm
+      else pkgs.hello;
+
+    enableBashIntegration = pkgs.stdenv.isLinux;
+    enableZshIntegration = pkgs.stdenv.isLinux;
+
+    extraConfig = let
+      fontsize =
+        if pkgs.stdenv.isLinux
+        then "13.0"
+        else "14.0";
+    in ''
+      -- Pull in the wezterm API
+      local wezterm = require 'wezterm'
+
+      -- This table will hold the configuration.
+      local config = {}
+
+      -- In newer versions of wezterm, use the config_builder which will
+      -- help provide clearer error messages
+      if wezterm.config_builder then
+        config = wezterm.config_builder()
+      end
+
+      wezterm.on('toggle-opacity', function(window, pane)
+        local overrides = window:get_config_overrides() or {}
+        if not overrides.window_background_opacity then
+          overrides.window_background_opacity = 0.93
+        else
+          overrides.window_background_opacity = nil
+        end
+        window:set_config_overrides(overrides)
+      end)
+
+      wezterm.on('toggle-maximize', function(window, pane)
+        window:maximize()
+      end)
+
+      -- This is where you actually apply your config choices
+      config.color_scheme = "Catppuccin Mocha"
+      config.font = wezterm.font_with_fallback {
+        "JetBrainsMono Nerd Font",
+        "FiraCode Nerd Font",
+
+        -- To avoid 'Chinese characters displayed as variant (Japanese) glyphs'
+        "Source Han Sans SC",
+        "Source Han Sans TC"
+      }
+
+      config.hide_tab_bar_if_only_one_tab = true
+      config.scrollback_lines = 10000
+      config.enable_scroll_bar = true
+      config.term = 'wezterm'
+
+      config.keys = {
+        -- toggle opacity(CTRL + SHIFT + B)
+        {
+          key = 'B',
+          mods = 'CTRL',
+          action = wezterm.action.EmitEvent 'toggle-opacity',
+        },
+        {
+          key = 'M',
+          mods = 'CTRL',
+          action = wezterm.action.EmitEvent 'toggle-maximize',
+        },
+      }
+      config.font_size = ${fontsize}
+
+      -- To resolve issues:
+      --   1. https://github.com/ryan4yin/nix-config/issues/26
+      --   2. https://github.com/ryan4yin/nix-config/issues/8
+      -- Spawn a nushell in login mode via `bash`
+      config.default_prog = { '${pkgs.bash}/bin/bash', '--login', '-c', 'nu --login --interactive' }
+
+      return config
+    '';
+  };
+}
@@ -1,8 +1,8 @@
-{username, ...}: {
+{myvars, ...}: {
  # Home Manager needs a bit of information about you and the
  # paths it should manage.
  home = {
-    inherit username;
+    inherit (myvars) username;

    # This value determines the Home Manager release that your
    # configuration is compatible with. This helps avoid breakage
@@ -1,21 +0,0 @@
-{
-  pkgs,
-  nur-ryan4yin,
-  ...
-}: {
-  # a cat(1) clone with syntax highlighting and Git integration.
-  programs.bat = {
-    enable = true;
-    config = {
-      pager = "less -FR";
-      theme = "catppuccin-mocha";
-    };
-    themes = {
-      # https://raw.githubusercontent.com/catppuccin/bat/main/Catppuccin-mocha.tmTheme
-      catppuccin-mocha = {
-        src = nur-ryan4yin.packages.${pkgs.system}.catppuccin-bat;
-        file = "Catppuccin-mocha.tmTheme";
-      };
-    };
-  };
-}
@@ -1,98 +0,0 @@
-{pkgs, ...}: {
-  home.packages = with pkgs; [
-    neofetch
-
-    # archives
-    zip
-    xz
-    unzip
-    p7zip
-
-    # networking tools
-    mtr # A network diagnostic tool
-    iperf3
-    dnsutils # `dig` + `nslookup`
-    ldns # replacement of `dig`, it provide the command `drill`
-    aria2 # A lightweight multi-protocol & multi-source command-line download utility
-    socat # replacement of openbsd-netcat
-    nmap # A utility for network discovery and security auditing
-    ipcalc # it is a calculator for the IPv4/v6 addresses
-
-    # Text Processing
-    # Docs: https://github.com/learnbyexample/Command-line-text-processing
-    gnugrep # GNU grep, provides `grep`/`egrep`/`fgrep`
-    gnused # GNU sed, very powerful(mainly for replacing text in files)
-    gnumake
-    just # a command runner like make, but simpler
-    gawk # GNU awk, a pattern scanning and processing language
-    sad # CLI search and replace, with diff preview, really useful!!!
-    delta # A viewer for git and diff output
-    # A fast and polyglot tool for code searching, linting, rewriting at large scale
-    # supported languages: only some mainstream languages currently(do not support nix/nginx/yaml/toml/...)
-    ast-grep
-    jq # A lightweight and flexible command-line JSON processor
-    yq-go # yaml processer https://github.com/mikefarah/yq
-
-    # misc
-    tldr
-    cowsay
-    file
-    which
-    tree
-    gnutar
-    zstd
-    caddy
-    gnupg
-    rsync
-
-    # nix related
-    #
-    # it provides the command `nom` works just like `nix
-    # with more details log output
-    nix-output-monitor
-    nodePackages.node2nix
-
-    # productivity
-    hugo # static site generator
-    glow # markdown previewer in terminal
-  ];
-
-  programs = {
-    # A modern replacement for ‘ls’
-    # useful in bash/zsh prompt, not in nushell.
-    eza = {
-      enable = true;
-      enableAliases = false; # do not enable aliases in nushell!
-      git = true;
-      icons = true;
-    };
-
-    # A command-line fuzzy finder
-    fzf = {
-      enable = true;
-      # https://github.com/catppuccin/fzf
-      # catppuccin-mocha
-      colors = {
-        "bg+" = "#313244";
-        "bg" = "#1e1e2e";
-        "spinner" = "#f5e0dc";
-        "hl" = "#f38ba8";
-        "fg" = "#cdd6f4";
-        "header" = "#f38ba8";
-        "info" = "#cba6f7";
-        "pointer" = "#f5e0dc";
-        "marker" = "#f5e0dc";
-        "fg+" = "#cdd6f4";
-        "prompt" = "#cba6f7";
-        "hl+" = "#f38ba8";
-      };
-    };
-
-    # skim provides a single executable: sk.
-    # Basically anywhere you would want to use grep, try sk instead.
-    skim = {
-      enable = true;
-      enableBashIntegration = true;
-    };
-  };
-}
@@ -0,0 +1,32 @@
+{
+  lib,
+  pkgs,
+  ...
+}: {
+  home.packages = with pkgs; [
+    # infrastructure as code
+    # pulumi
+    # pulumictl
+    # tf2pulumi
+    # crd2pulumi
+    # pulumiPackages.pulumi-random
+    # pulumiPackages.pulumi-command
+    # pulumiPackages.pulumi-aws-native
+    # pulumiPackages.pulumi-language-go
+    # pulumiPackages.pulumi-language-python
+    # pulumiPackages.pulumi-language-nodejs
+
+    # aws
+    awscli2
+    ssm-session-manager-plugin # Amazon SSM Session Manager Plugin
+    aws-iam-authenticator
+    eksctl
+
+    # aliyun
+    aliyun-cli
+    # cloud tools that nix do not have cache for.
+    terraform
+    terraformer # generate terraform configs from existing cloud resources
+    packer # machine image builder
+  ];
+}
@@ -0,0 +1,61 @@
+{
+  pkgs,
+  pkgs-unstable,
+  ...
+}: {
+  #############################################################
+  #
+  #  Basic settings for development environment
+  #
+  #  Please avoid to install language specific packages here(globally),
+  #  instead, install them:
+  #     1. per IDE, such as `programs.neovim.extraPackages`
+  #     2. per-project, using https://github.com/the-nix-way/dev-templates
+  #
+  #############################################################
+
+  home.packages = with pkgs; [
+    colmena # nixos's remote deployment tool
+
+    # db related
+    mycli
+    pgcli
+    mongosh
+    sqlite
+
+    # embedded development
+    minicom
+
+    # ai related
+    python311Packages.huggingface-hub # huggingface-cli
+
+    # misc
+    pkgs-unstable.devbox
+    bfg-repo-cleaner # remove large files from git history
+    k6 # load testing tool
+    protobuf # protocol buffer compiler
+
+    # solve coding extercises - learn by doing
+    exercism
+
+    # Automatically trims your branches whose tracking remote refs are merged or gone
+    # It's really useful when you work on a project for a long time.
+    git-trim
+
+    # need to run `conda-install` before using it
+    # need to run `conda-shell` before using command `conda`
+    # conda is not available for MacOS
+    conda
+  ];
+
+  programs = {
+    direnv = {
+      enable = true;
+      nix-direnv.enable = true;
+
+      enableZshIntegration = true;
+      enableBashIntegration = true;
+      enableNushellIntegration = true;
+    };
+  };
+}
@@ -6,18 +6,22 @@

 > https://langserver.org/

-The Language Server Protocol (LSP) is an open, JSON-RPC-based protocol for use between source code editors or integrated development environments (IDEs) and servers that provide programming language-specific features like:
+The Language Server Protocol (LSP) is an open, JSON-RPC-based protocol for use between source code
+editors or integrated development environments (IDEs) and servers that provide programming
+language-specific features like:

+- motions such as go-to-definition, find-references, hover.
 - **code completion**
 - **marking of warnings and errors**
 - **refactoring routines**
 - syntax highlighting (use Tree-sitter instead)
 - code formatting (use a dedicated formatter instead)

-The goal of the protocol is to allow programming language support to be implemented and distributed independently of any given editor or IDE.
+The goal of the protocol is to allow programming language support to be implemented and distributed
+independently of any given editor or IDE.

-LSP was originally developed for Microsoft Visual Studio Code and is now an open standard.
-In the early 2020s LSP quickly became a "norm" for language intelligence tools providers.
+LSP was originally developed for Microsoft Visual Studio Code and is now an open standard. In the
+early 2020s LSP quickly became a "norm" for language intelligence tools providers.

 ### Tree-sitter

@@ -25,7 +29,9 @@ In the early 2020s LSP quickly became a "norm" for language intelligence tools p

 > https://www.reddit.com/r/neovim/comments/1109wgr/treesitter_vs_lsp_differences_ans_overlap/

-Tree-sitter is a parser generator tool and an **incremental parsing** library. It can build a concrete syntax tree for a source file and efficiently update the syntax tree as the source file is edited.
+Tree-sitter is a parser generator tool and an **incremental parsing** library. It can build a
+concrete syntax tree for a source file and efficiently update the syntax tree as the source file is
+edited.

 It is used by many editors and IDEs to provide:

@@ -37,17 +43,22 @@ It is used by many editors and IDEs to provide:
  - such as join/split lines, structural editing, cursor motion, etc.

 **Treesitter process each file independently**, and it is not aware of the semantics of your code.
-For example, it does not know does a function/variable really exist, or what is the type/return-type of a variable. This is where LSP comes in.
+For example, it does not know does a function/variable really exist, or what is the type/return-type
+of a variable. This is where LSP comes in.

-The LSP server parses the code much more deeply and it **not only parses a single file but your whole project**.
-So, the LSP server will know whether a function/variable does exist with the same type/return-type. If it does not, it will mark it as an error.
+The LSP server parses the code much more deeply and it **not only parses a single file but your
+whole project**. So, the LSP server will know whether a function/variable does exist with the same
+type/return-type. If it does not, it will mark it as an error.

 **LSP does understand the code semantically, while Treesitter only cares about correct syntax**.

 #### LSP vs Tree-sitter

- Tree-sitter: lightweight, fast, but limited knowledge of your code. mainly used for **syntax highlighting, indentation, and folding/refactoring in a single file**.
- LSP: heavy and slow on large projects, but it has a deep understanding of your code. mainly used for **code completion, refactoring in the projects, errors/warnings, and other semantic-aware features**.
+- Tree-sitter: lightweight, fast, but limited knowledge of your code. mainly used for **syntax
+  highlighting, indentation, and folding/refactoring in a single file**.
+- LSP: heavy and slow on large projects, but it has a deep understanding of your code. mainly used
+  for **code completion, refactoring in the projects, errors/warnings, and other semantic-aware
+  features**.

 ### Formatter vs Linter

@@ -55,7 +66,10 @@ Linting is distinct from Formatting because:

 1. **formatting** only restructures how code appears.
   1. `prettier` is a popular formatter.
-1. **linting** analyzes how the code runs and detects errors, it may also suggest improvements such as replace `var` with `let` or `const`.
+1. **linting** analyzes how the code runs and detects errors, it may also suggest improvements such
+   as replace `var` with `let` or `const`.

-Formatters and Linters process each file independently, they do not need to know about other files in the project.
-  * [ ]
+Formatters and Linters process each file independently, they do not need to know about other files
+in the project.
+
+- [ ]
@@ -0,0 +1,215 @@
+# Editors
+
+My editors:
+
+1. Neovim
+2. Emacs
+3. Helix
+
+And `Zellij` for a smooth and stable terminal experience.
+
+## Tips
+
+1. Many useful keys are already provided by vim, check vim/neovim's docs before you install a new
+   plugin / reinvent the wheel.
+1. After using Emacs/Neovim more skillfully, I strongly recommend that you read the official
+   documentation of Neovim/vim:
+   1. <https://vimhelp.org/>: The official vim documentation.
+   1. <https://neovim.io/doc/user/>: Neovim's official user documentation.
+1. Use Zellij for terminal related operations, and use Neovim/Helix for editing.
+1. As for Emacs, Use its GUI version & terminal emulator `vterm` for terminal related operations.
+1. Two powerful file search & jump tools:
+1. Tree-view plugins are beginner-friendly and intuitive, but they're not very efficient.
+1. **Search by the file path**: Useful when you're familiar with the project structure, especially
+   on a large project.
+1. **Search by the content**: Useful when you're familiar with the code.
+
+## Tutorial
+
+Type `:tutor`(`:Tutor` in Neovim) to learn the basics usage of vim/neovim.
+
+## VIM's Cheetsheet
+
+> Here only record my commonly used keys, to see **a more comprehensive cheetsheet**:
+> <https://vimhelp.org/quickref.txt.html>
+
+Both Emacs-Evil & Neovim are compatible with vim, sothe key-bindings described here are common in
+both Emacs-Evil, Neovim & vim.
+
+### Terminal Related
+
+I mainly use Zellij for terminal related operations, here is its terminal shortcuts I use frequently
+now:
+
+| Action                    | Zellij's Shortcut |
+| ------------------------- | ----------------- |
+| Floating Terminal         | `Ctrl + p + w`    |
+| Horizontal Split Terminal | `Ctrl + p + d`    |
+| Vertical Split Terminal   | `Ctrl + p + n`    |
+| Execute a command         | `!xxx`            |
+
+### File Management
+
+> <https://neovim.io/doc/user/usr_22.html>
+
+> <https://vimhelp.org/editing.txt.html>
+
+| Action                              |                                                  |
+| ----------------------------------- | ------------------------------------------------ |
+| Save selected text to a file        | `:w filename` (Will show `:'<,'>w filename`)     |
+| Save and close the current buffer   | `:wq`                                            |
+| Save all buffers                    | `:wa`                                            |
+| Save and close all buffers          | `:wqa`                                           |
+| Edit a file                         | `:e filename`(or `:e <TAB>` to show a file list) |
+| Browse the file list                | `:Ex` or `:e .`                                  |
+| Discard changes and reread the file | `:e!`                                            |
+
+### Motion
+
+> https://vimhelp.org/motion.txt.html
+
+| Action                                              | Command                                            |
+| --------------------------------------------------- | -------------------------------------------------- |
+| Move to the start/end of the buffer                 | `gg`/`G`                                           |
+| Move the line number 5                              | `5gg` / `5G`                                       |
+| Move left/down/up/right                             | h/j/k/l or `5h`/`5j`/`5k`/`5l` or `Ctr-n`/`Ctrl-p` |
+| Move to the matchpairs, default to `()`, `{}`, `[]` | `%`                                                |
+| Move to the start/end of the line                   | `0` / `$`                                          |
+| Move a sentence forward/backward                    | `(` / `)`                                          |
+| Move a paragraph forward/backward                   | `{` / `}`                                          |
+| Move a section forward/backward                     | `[[` / `]]`                                        |
+| Jump to various positions                           | `'` + some other keys(neovim has prompt)           |
+
+Text Objects:
+
+- **sentence**: text ending at a '.', '!' or '?' followed by either the end of a line, or by a space
+  or tab.
+- **paragraph**: text ending at a blank line.
+- **section**: text starting with a section header and ending at the start of the next section
+  header (or at the end of the file). - The "`]]`" and "`[[`" commands stop at the '`{`' in the
+  first column. This is useful to find the start of a function in a C/Go/Java/... program.
+
+### Text Manipulation
+
+Basics:
+
+| Action                                  |                            |
+| --------------------------------------- | -------------------------- |
+| Delete the current character            | `x`                        |
+| Paste the copied text                   | `p`                        |
+| Delete the selection                    | `d`                        |
+| Undo the last word                      | `CTRL-w`(in insert mode)   |
+| Undo the last line                      | `CTRL-u`(in insert mode)   |
+| Undo the last change                    | `u`                        |
+| Redo the last change                    | `Ctrl + r`                 |
+| Inserts the text of the previous insert | `Ctrl + a`                 |
+| Repeat the last command                 | `.`                        |
+| Toggle text's case                      | `~`                        |
+| Convert to uppercase                    | `U` (visual mode)          |
+| Convert to lowercase                    | `u` (visual mode)          |
+| Align the selected content              | `:center`/`:left`/`:right` |
+
+Misc:
+
+| Action                        | Shortcut                                 |
+| ----------------------------- | ---------------------------------------- |
+| Toggle visual mode            | `v` (lower case v)                       |
+| Select the current line       | `V` (upper case v)                       |
+| Toggle visual block mode      | `<Ctrl> + v` (select a block vertically) |
+| Fold the current code block   | `zc`                                     |
+| Unfold the current code block | `zo`                                     |
+| Jump to Definition            | `gd`                                     |
+| Jump to References            | `gD`                                     |
+| (Un)Comment the current line  | `gcc`                                    |
+
+| Action                                                                    |                |
+| ------------------------------------------------------------------------- | -------------- |
+| Sort the selected lines                                                   | `:sort`        |
+| Join Selection of Lines With Space                                        | `:join` or `J` |
+| Join without spaces                                                       | `:join!`       |
+| Enter Insert mode at the start/end of the line                            | `I` / `A`      |
+| Delete from the cursor to the end of the line                             | `D`            |
+| Delete from the cursor to the end of the line, and then enter insert mode | `C`            |
+
+Advance Techs:
+
+- Add at the end of multiple lines: `:normal A<text>`
+
+  - Execublock: `:A<text>`
+  - visual block mode(ctrl + v)
+  - Append text at the end of each line in the selected block
+  - If position exceeds line end, neovim adds spaces automatically
+
+- Delete the last char of multivle lines: `:normal $x`
+
+  - Execute `$x` on each line
+  - visual mode(v)
+  - `$` moves cursor to the end of line
+  - `x` deletes the character under the cursor
+
+- Delete the last word of multiple lines: `:normal $bD`
+  - Execute `$bD` on each line
+  - visual mode(v)
+  - `$` moves cursor to the end of line
+  - `b` moves cursor to the beginning of the last word
+
+### Search
+
+| Action                                                | Command   |
+| ----------------------------------------------------- | --------- |
+| Search forward/backword for a pattern                 | `/` / `?` |
+| Repeat the last search in the same/opposite direction | `n` / `N` |
+
+### Find and Replace
+
+| Action                           | Command                             |
+| -------------------------------- | ----------------------------------- |
+| Replace in selected area         | `:s/old/new/g`                      |
+| Replace in current line          | Same as above                       |
+| Replace all the lines            | `:% s/old/new/g`                    |
+| Replace all the lines with regex | `:% s@\vhttp://(\w+)@https://\1@gc` |
+
+1. `\v` means means that in the regex pattern after it can be used without backslash
+   escaping(similar to python's raw string).
+2. `\1` means the first matched group in the pattern.
+
+### Replace in the specific lines
+
+| Action                                    | Command                                |
+| ----------------------------------------- | -------------------------------------- |
+| From the 10th line to the end of the file | `:10,$ s/old/new/g` or `:10,$ s@^@#@g` |
+| From the 10th line to the 20th line       | `:10,20 s/old/new/g`                   |
+| Remove the trailing spaces                | `:% s/\s\+$//g`                        |
+
+The postfix(flags) in the above commands:
+
+1. `g` means replace all the matched strings in the current line/file.
+2. `c` means ask for confirmation before replacing.
+3. `i` means ignore case.
+
+### Buffers, Windows and Tabs
+
+> <https://neovim.io/doc/user/usr_08.html>
+
+> <https://vimhelp.org/windows.txt.html>
+
+- A buffer is the in-memory text of a file.
+- A window is a viewport on a buffer.
+- A tab page is a collection of windows.
+
+| Action                              | Command                             |
+| ----------------------------------- | ----------------------------------- |
+| Split the window horizontally       | `:sp[lit]` or `:sp filename`        |
+| Split the window horizontally       | `:vs[plit]` or `:vs filename`       |
+| Switch to the next/previous window  | `Ctrl-w + w` or `Ctrl-w + h/j/k/l`  |
+| Show all buffers                    | `:ls`                               |
+| show next/previous buffer           | `]b`/`[b` or `:bn[ext]` / `bp[rev]` |
+| New Tab(New Workspace in DoomEmacs) | `:tabnew`                           |
+| Next/Previews Tab                   | `gt`/`gT`                           |
+
+### History
+
+| Action                   | Command |
+| ------------------------ | ------- |
+| Show the command history | `q:`    |
+| Show the search history  | `q/`    |
@@ -0,0 +1,25 @@
+# Structured Editing
+
+## S-expression data(Lisp)
+
+- paredit/[lispy](https://github.com/doomemacs/doomemacs/tree/master/modules/editor/lispy): too
+  complex.
+- [evil-cleverparens](https://github.com/emacs-evil/evil-cleverparens): simple and useful.
+- [parinfer(par-in-fer)](https://shaunlebron.github.io/parinfer/): morden, simple, elegant and
+  useful, but works not well with some other completion plugins...
+  - to make parinfer works, you should disable sexp & smartparens in any lisp mode.
+
+Some plugins:
+
+- Emacs
+  - [parinfer-rusT-mode](https://github.com/justinbarclay/parinfer-rust-mode)
+- Neovim
+  - [parinfer-rust](https://github.com/eraserhd/parinfer-rust)
+  - <https://github.com/Olical/conjure>
+- Helix
+  - [parinfer #4090 - Helix](https://github.com/helix-editor/helix/discussions/4090)
+
+## Other Languages
+
+1. treesitter
+1. ...
@@ -1,23 +1,33 @@
 # Emacs Editor

- Framework: <https://github.com/doomemacs/doomemacs>
-  - key bindings:
-    - source code: <https://github.com/doomemacs/doomemacs/blob/master/modules/config/default/%2Bevil-bindings.el>
-    - docs: <https://github.com/doomemacs/doomemacs/blob/master/modules/editor/evil/README.org>
-  - module index: <https://github.com/doomemacs/doomemacs/blob/master/docs/modules.org>
- Chinese(rime) support: <https://github.com/DogLooksGood/emacs-rime>
- modal editing:
-  - <https://github.com/emacs-evil/evil>: evil mode, enabled by default in doom-emacs.
-  - <https://github.com/meow-edit/meow>
- LSP Client: <https://github.com/manateelazycat/lsp-bridge>
- Emacs Wiki: <https://www.emacswiki.org/emacs/SiteMap>
- Awesome Emacs: <https://github.com/emacs-tw/awesome-emacs#lsp-client>
-
 ## Why emacs?

 1. Explore the unknown, just for fun!
 2. Org Mode
 3. Lisp Coding
+4. A top-level tutorial for Emacs(Chinese): <https://nyk.ma/tags/emacs/>
+5. A Beginner's Guide to Emacs(Chinese):
+   <https://github.com/emacs-tw/emacs-101-beginner-survival-guide>
+
+## Screenshot
+
+![](/_img/emacs-2024-01-07.webp)
+
+## Useful Links
+
+- Framework: <https://github.com/doomemacs/doomemacs>
+  - key bindings:
+    - source code:
+      <https://github.com/doomemacs/doomemacs/blob/master/modules/config/default/%2Bevil-bindings.el>
+    - docs: <https://github.com/doomemacs/doomemacs/blob/master/modules/editor/evil/README.org>
+  - module index: <https://github.com/doomemacs/doomemacs/blob/master/docs/modules.org>
+- LSP Client: <https://github.com/manateelazycat/lsp-bridge>
+- Emacs Wiki: <https://www.emacswiki.org/emacs/SiteMap>
+- Awesome Emacs: <https://github.com/emacs-tw/awesome-emacs#lsp-client>
+- Chinese(rime) support: <https://github.com/DogLooksGood/emacs-rime>
+- modal editing:
+  - <https://github.com/emacs-evil/evil>: evil mode, enabled by default in doom-emacs.
+  - <https://github.com/meow-edit/meow>

 ## Install or Update

@@ -36,29 +46,45 @@ when in doubt, run `doom sync`!
 ```bash
 # testing
 just emacs-test
-jsut emacs-purge
+just emacs-purge
 just emacs-reload

 # clear test data
-just emacs-clear
+just emacs-clean
 ```

+## Limits
+
+- It's too slow to start up and install(compile/build) packages.
+  - I have to use emacs in daemon/client mode to avoid this issue.
+- It's too large in size, not suitable for servers.
+  - So vim/neovim is still the best choice for servers.
+- Emacs's markdown-mode works not well with tables, see:
+  - https://github.com/jrblevin/markdown-mode/issues/380
+- I use git command frequently, but doomemacs only autoupdates status of git diff / treemacs when
+  using magit.
+  - I have to learn magit to avoid this issue...
+- GitHub's orgmode support is not well, Markdown is better for GitHub.
+  - Use markdown for repo's README.md, and use orgmode for my personal notes and docs only.
+
 ## Cheetsheet

-Here is the cheetsheet related to my DoomEmacs configs. Please read vim's common cheetsheet at [../README.md](../README.md) before reading the following.
+Here is the cheetsheet related to my DoomEmacs configs. Please read vim's common cheetsheet at
+[../README.md](../README.md) before reading the following.

 ### Basics

 > Terminal(vterm) is useful in GUI mode, I use Zellij instead in terminal mode.

-> We can run any emacs command via `M-x`(Alt + x).
-
-| Action                 | Shortcut      |
-| ---------------------- | ------------- |
-| Popup Terminal(vterm)  | `SPC + o + t` |
-| Open Terminal          | `SPC + o + T` |
-| Open file tree sidebar | `SPC + o + p` |
-| Exit                   | `M-x C-c`     |
+| Action                 | Shortcut                                          |
+| ---------------------- | ------------------------------------------------- |
+| Popup Terminal(vterm)  | `SPC + o + t`                                     |
+| Open Terminal          | `SPC + o + T`                                     |
+| Open file tree sidebar | `SPC + o + p`                                     |
+| Frame fullscreen       | `SPC + t + F`                                     |
+| Exit                   | `M-x C-c`                                         |
+| Execute Command        | `M-x`(hold on `Alt`/`option`, and then press `x`) |
+| Eval Lisp Code         | `M-:`(hold on `Alt`/`option`, and then press `:`) |

 ### Window Navigation

@@ -76,7 +102,8 @@ Here is the cheetsheet related to my DoomEmacs configs. Please read vim's common
 ### File Tree

 - treemacs: <https://github.com/Alexander-Miller/treemacs/blob/master/src/elisp/treemacs-mode.el>
- treemacs-evil: <https://github.com/Alexander-Miller/treemacs/blob/master/src/extra/treemacs-evil.el>
+- treemacs-evil:
+  <https://github.com/Alexander-Miller/treemacs/blob/master/src/extra/treemacs-evil.el>

 | Action                                | Shortcut  |
 | ------------------------------------- | --------- |
@@ -145,7 +172,7 @@ SPC s p foo C-; E C-c C-p :%s/foo/bar/g RET Z Z

 > easily switch between projects without exit emacs!

-| Action                     |               |
+| Action                     | Shortcut      |
 | -------------------------- | ------------- |
 | Switch between projects    | `SPC + p + p` |
 | Browse the current project | `SPC + p + .` |
@@ -155,10 +182,49 @@ SPC s p foo C-; E C-c C-p :%s/foo/bar/g RET Z Z

 > Very useful when run emacs in daemon/client modes

-| Action                      |                             |
+| Action                      | Shortcut                    |
 | --------------------------- | --------------------------- |
 | Switch between workspaces   | `M-1/2/3/...`(Alt-1/2/3/..) |
 | New Workspace               | `SPC + TAB + n`             |
 | New Named Workspace         | `SPC + TAB + N`             |
 | Delete Workspace            | `SPC + TAB + d`             |
 | Display Workspaces bar blow | `SPC + TAB + TAB`           |
+
+### Magit
+
+> https://github.com/magit/magit
+
+Magit is a powerful tool that make git operations easy and intuitive.
+
+| Action                   | Shortcut                 |
+| ------------------------ | ------------------------ |
+| Open Magit               | `C-x g` or `SPC + g + g` |
+| Switch branch            | `SPC + g + b`            |
+| Show buffer's commit log | `SPC + g + L`            |
+
+Shortcuts in magit's pane:
+
+> When run `git commit` / `git add` / `git push` /... via magit, multiple Arguments can be set. Set
+> arguments won't trigger a git command immediately. Magit will try to run a git command only after
+> an Action key is pressed.
+
+| Action                                             | Shortcut                                      |
+| -------------------------------------------------- | --------------------------------------------- |
+| Quit the current Magit pane                        | `q`                                           |
+| Show log                                           | `l`                                           |
+| Show current branch's log                          | `l + l`                                       |
+| Show current reflog                                | `l + r`                                       |
+| Commit                                             | `c`                                           |
+| Stage                                              | `s`                                           |
+| Unstage                                            | `u`                                           |
+| Push                                               | `p`                                           |
+| Pull                                               | `f`                                           |
+| Rebase                                             | `r`                                           |
+| Rebase Interactively                               | `r + i`, select on a commit, then `C-c + C-c` |
+| Stash                                              | `z`                                           |
+| Merge                                              | `m`                                           |
+| Fold/Unfold                                        | `TAB`                                         |
+| Show details of the current unit(commit/stage/...) | `<ENTER>`                                     |
+
+KeyBinding full list:
+<https://github.com/emacs-evil/evil-collection/tree/master/modes/magit#key-bindings>
@@ -24,6 +24,9 @@ with lib; let
  };
  librime-dir = "${config.xdg.dataHome}/emacs/librime";
  parinfer-rust-lib-dir = "${config.xdg.dataHome}/emacs/parinfer-rust";
+  myEmacsPackagesFor = emacs: ((pkgs.emacsPackagesFor emacs).emacsWithPackages (epkgs: [
+    epkgs.vterm
+  ]));
 in {
  options.modules.editors.emacs = {
    enable = mkEnableOption "Emacs Editor";
@@ -40,10 +43,11 @@ in {
        ## Optional dependencies
        fd # faster projectile indexing
        imagemagick # for image-dired
+        fd # faster projectile indexing
        zstd # for undo-fu-session/undo-tree compression

        # go-mode
-        gocode
+        # gocode # project archived, use gopls instead

        ## Module dependencies
        # :checkers spell
@@ -53,7 +57,7 @@ in {
        # :tools lookup & :lang org +roam
        sqlite
        # :lang latex & :lang org (latex previews)
-        texlive.combined.scheme-medium
+        # texlive.combined.scheme-medium
      ];

      programs.bash.bashrcExtra = envExtra;
@@ -61,19 +65,11 @@ in {
      home.shellAliases = shellAliases;
      programs.nushell.shellAliases = shellAliases;

-      # allow fontconfig to discover fonts and configurations installed through `home.packages`
-      fonts.fontconfig.enable = true;
-
      xdg.configFile."doom" = {
        source = ./doom;
        force = true;
      };

-      xdg.configFile."emacs/lsp-bridge-user-langserver" = {
-        source = ./lsp-bridge-user-langserver;
-        force = true;
-      };
-
      home.activation.installDoomEmacs = lib.hm.dag.entryAfter ["writeBoundary"] ''
        ${pkgs.rsync}/bin/rsync -avz --chmod=D2755,F744 ${doomemacs}/ ${config.xdg.configHome}/emacs/

@@ -92,7 +88,7 @@ in {
        # Do not use emacs-nox here, which makes the mouse wheel work abnormally in terminal mode.
        # pgtk (pure gtk) build add native support for wayland.
        # https://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html#Releases
-        emacsPkg = (pkgs.emacsPackagesFor pkgs.emacs29-pgtk).emacsWithPackages (epkgs: [epkgs.vterm]);
+        emacsPkg = myEmacsPackagesFor pkgs.emacs29-pgtk;
      in {
        home.packages = [emacsPkg];
        services.emacs = {
@@ -111,7 +107,7 @@ in {
      let
        # macport adds some native features based on GNU Emacs 29
        # https://bitbucket.org/mituharu/emacs-mac/src/master/README-mac
-        emacsPkg = (pkgs.emacsPackagesFor pkgs.emacs29-macport).emacsWithPackages (epkgs: [epkgs.vterm]);
+        emacsPkg = myEmacsPackagesFor pkgs.emacs29;
      in {
        home.packages = [emacsPkg];
        launchd.enable = true;
@@ -21,7 +21,7 @@
 ;; See 'C-h v doom-font' for documentation and more examples of what they
 ;; accept. For example:
 ;;
-(setq doom-font (font-spec :family "JetBrainsMono Nerd Font" :size 18 :weight 'normal)
+(setq doom-font (font-spec :family "JetBrainsMono Nerd Font" :size 18)
      doom-variable-pitch-font (font-spec :family "DejaVu Sans")
      doom-symbol-font (font-spec :family "Symbols Nerd Font Mono")
      doom-big-font (font-spec :family "JetBrainsMono Nerd Font" :size 28))
@@ -46,9 +46,17 @@
 ;; other doom's official themes:
 ;;   https://github.com/doomemacs/themes
 (setq doom-theme 'doom-dracula) ;; doom-one doom-dracula doom-nord
-;; Transparent Background
-(set-frame-parameter nil 'alpha-background 93) ; For current frame
-(add-to-list 'default-frame-alist '(alpha-background . 93)); For all new frames henceforth
+(if (eq system-type 'darwin)
+    ;; Transparent Backgroud - for macOS
+    ;;(set-frame-parameter (selected-frame) 'alpha '(<active> . <inactive>))
+    ;;(set-frame-parameter (selected-frame) 'alpha <both>)
+    (progn
+      (set-frame-parameter (selected-frame) 'alpha '(85 . 70))
+      (add-to-list 'default-frame-alist '(alpha . (85 . 70))))
+  ;; Transparent Background - for Linux Xorg/Wayland
+  (set-frame-parameter nil 'alpha-background 93) ; For current frame
+  (add-to-list 'default-frame-alist '(alpha-background . 93))); For all new frames henceforth
+
 ;; This determines the style of line numbers in effect. If set to `nil', line
 ;; numbers are disabled. For relative line numbers, set this to `relative'.
 (setq display-line-numbers-type t)
@@ -88,36 +96,21 @@
 ;; You can also try 'gd' (or 'C-c c d') to jump to their definition and see how
 ;; they are implemented.

-(use-package! lsp-bridge
-  :config
-  (setq lsp-bridge-enable-log nil)  ;; disabled for performance
-  ;; for user's custom langserver file
-  (setq lsp-bridge-user-langserver-dir "~/.config/emacs/lsp-bridge-user-langserver")
-  (setq lsp-bridge-enable-auto-format-code 1)
-  (global-lsp-bridge-mode))
-
-(use-package! wakatime-mode :ensure t)
-;; fully enable tree-sitter highlighting
-(after! tree-sitter
-  (setq +tree-sitter-hl-enabled-modes t))
-;; fix: https://github.com/jrblevin/markdown-mode/issues/380
-;; even add this one, editing a large markdown table is still very slow.
-;; so avoid editing large markdown file in emacs, use neovim instead...
-(after! markdown-mode
-  (global-font-lock-mode 0))
-
 ;; use alejandra to format nix files
-;; (use-package! lsp-nix
-;;   :ensure lsp-mode
-;;   :after
-;;   (lsp-mode)
-;;   :demand t
-;;   :custom
-;;   (lsp-nix-nil-formatter
-;;    ["alejandra"]))
+(use-package! lsp-nix
+  :ensure lsp-mode
+  :after
+  (lsp-mode)
+  :demand t
+  :custom
+  (lsp-nix-nil-formatter
+   ["alejandra"]))
+
 (use-package! nushell-mode
  :config
  (setq nushell-enable-auto-indent 1))
+(after! vterm
+  (setq vterm-shell "nu")) ; use nushell by defualt

 ;; emacs-rime
 (use-package! rime
@@ -155,3 +148,28 @@
 (add-hook 'fennel-mode-hook         #'turn-off-smartparens-mode)
 (add-hook 'hy-mode-hook             #'turn-off-smartparens-mode)

+;; auto-save
+(use-package super-save
+  :ensure t
+  :config
+  (super-save-mode +1)
+  (setq super-save-auto-save-when-idle t)
+  (setq auto-save-default nil))
+
+;; save on find-file
+(add-to-list 'super-save-hook-triggers 'find-file-hook)
+
+(use-package! copilot
+  :hook
+  (prog-mode . copilot-mode)
+  :bind
+  (:map copilot-completion-map
+        ("<tab>" . 'copilot-accept-completion)
+        ("TAB" . 'copilot-accept-completion)
+        ("C-TAB" . 'copilot-accept-completion-by-word)
+        ("C-<tab>" . 'copilot-accept-completion-by-word))
+  :config
+  (copilot-mode +1))
+
+(use-package! wakatime-mode :ensure t)
+
@@ -34,7 +34,7 @@
       doom                             ; what makes DOOM look the way it does
       doom-dashboard                   ; a nifty splash screen for Emacs
       ;;doom-quit         ; DOOM quit-message prompts when you quit Emacs
-       (emoji +unicode)
+       ;; (emoji +unicode) ; Emacs 29 provides native support for inserting Unicode emojis.
                                        ; 🙂
       hl-todo            ; highlight TODO/FIXME/NOTE/DEPRECATED/HACK/REVIEW
       indent-guides      ; highlighted indent columns
@@ -61,7 +61,7 @@
       (format +onsave)
                                        ; automated prettiness
       ;; multiple-cursors  ; editing in many places at once
-       ;; objed             ; text object editing for the innocent
+       ;; objed             ; text object editing for the innocent, conflict with parinfer
       parinfer          ; turn lisp into python, sort of, conflict with copilot/objed/smartparens
       ;;rotate-text       ; cycle region at point between text candidates
       snippets   ; my elves. They type so I don't have to
@@ -98,7 +98,7 @@
       (eval +overlay)
                                        ; run code, run (also, repls)
       lookup                   ; navigate your code and its documentation
-       ;; lsp    ; lsp-mode, conflict with lsp-bridge
+       lsp    ; lsp-mode, conflict with lsp-bridge
       magit                    ; a git porcelain for Emacs
       ;;make              ; run make tasks from Emacs
       ;;pass              ; password manager for nerds
@@ -117,7 +117,7 @@
       :lang
       ;;agda              ; types of types of types of types...
       ;;beancount         ; mind the GAAP
-       (cc +tree-sitter)
+       (cc +lsp +tree-sitter)
                                        ; C > C++ == 1
       ;;clojure           ; java with a lisp
       ;;common-lisp       ; if you've seen one lisp, you've seen them all
@@ -138,17 +138,17 @@
       ;;fsharp            ; ML stands for Microsoft's Language
       ;;fstar             ; (dependent) types and (monadic) effects and Z3
       ;;gdscript          ; the language you waited for
-       (go +tree-sitter)  ;; disable go-mode, use lsp-bridge instead
+       (go +lsp +tree-sitter)  ;; disable go-mode, use lsp-bridge instead
                                        ; the hipster dialect
       ;;(graphql)    ; Give queries a REST
       ;;(haskell)    ; a language that's lazier than I am
       ;;hy                ; readability of scheme w/ speed of python
       ;;idris             ; a language you can depend on
-       (json +tree-sitter)
+       (json +lsp +tree-sitter)
                                        ; At least it ain't XML
-       (java +tree-sitter)
+       (java +lsp +tree-sitter)
                                        ; the poster child for carpal tunnel syndrome
-       (javascript +tree-sitter)
+       (javascript +lsp +tree-sitter)
                                        ; all(hope(abandon(ye(who(enter(here))))))
       ;;julia             ; a better, faster MATLAB
       ;;kotlin            ; a better, slicker Java(Script)
@@ -156,19 +156,19 @@
                                        ; writing papers in Emacs has never been so fun
       ;;lean              ; for folks with too much to prove
       ;;ledger            ; be audit you can be
-       (lua +tree-sitter)
+       (lua +lsp +tree-sitter)
                                        ; one-based indices? one-based indices
       (markdown +grip)
                                        ; writing docs for people to ignore
       ;;nim               ; python + lisp at the speed of c
-       (nix +tree-sitter)
+       (nix +lsp +tree-sitter)
                                        ; I hereby declare "nix geht mehr!"
       ;;ocaml             ; an objective camel
-       org              ; organize your plain life in plain text
+       (org +pandoc +hugo +jupyter)  ; organize your plain life in plain text
       ;;php               ; perl's insecure younger brother
       ;;plantuml          ; diagrams for confusing people more
       ;;purescript        ; javascript, but functional
-       (python +tree-sitter +pyright)
+       (python +lsp +tree-sitter +pyright)
                                        ; beautiful is better than ugly
       ;;qt                ; the 'cutest' gui framework ever
       racket           ; a DSL for DSLs
@@ -176,20 +176,20 @@
       ;;rest              ; Emacs as a REST client
       ;;rst               ; ReST in peace
       ;;(ruby +rails)     ; 1.step {|i| p "Ruby is #{i.even? ? 'love' : 'life'}"}
-       (rust +tree-sitter)
+       (rust +lsp +tree-sitter)
                                        ; Fe2O3.unwrap().unwrap().unwrap().unwrap()
       ;;scala             ; java, but good
       (scheme +guile)
                                        ; a fully conniving family of lisps
-       (sh +tree-sitter)
+       (sh +lsp +tree-sitter)
                                        ; she sells {ba,z,fi}sh shells on the C xor
       ;;sml
       ;;solidity          ; do you need a blockchain? No.
       ;;swift             ; who asked for emoji variables?
       ;;terra             ; Earth and Moon in alignment for performance.
-       (web +tree-sitter)
+       (web +lsp +tree-sitter)
                                        ; support for various web languages, including HTML5, CSS, SASS/SCSS, Pug/Jade/Slim, and more
-       (yaml +tree-sitter)
+       (yaml +lsp +tree-sitter)
                                        ; JSON, but readable
       ;;zig               ; C, but simpler

@@ -5,7 +5,7 @@
 ;; on the command line, then restart Emacs for the changes to take effect -- or
 ;; use 'M-x doom/reload'.

-(package! nerd-icons)
+(package! super-save)
 (package! rime)
 (package! wakatime-mode
  :recipe
@@ -15,15 +15,10 @@
 (package! nushell-mode :recipe
  (:host github :repo "mrkkrp/nushell-mode"))

-(when (package! lsp-bridge
-        :recipe (:host github
-                 :repo "manateelazycat/lsp-bridge"
-                 :branch "master"
-                 :files ("*.el" "*.py" "acm" "core" "langserver" "multiserver" "resources")
-                 ;; do not perform byte compilation or native compilation for lsp-bridge
-                 :build (:not compile)))
-  (package! markdown-mode)
-  (package! yasnippet))
+(package! copilot
+  :recipe
+  (:host github :repo "copilot-emacs/copilot.el" :files
+         ("*.el" "dist")))

 ;; To install SOME-PACKAGE from MELPA, ELPA or emacsmirror:
 ;; (package! some-package)
@@ -0,0 +1,64 @@
+# Helix Editor
+
+Neovim is really powerful, and have a very active community. I use it as my main editor, and I'm
+very happy with it. I use it for everything, from writing code to writing this document.
+
+But its configuration is a bit complex, and finding the right plugins, writing configurations, and
+keeping everything up to date is not easy.
+
+That's why I'm interested in Helix, Helix is similar to Neovim, but it's more opinionated, and it's
+batteries included. Whether I'll switch my main editor to Helix or not, it gives me a lot of ideas
+on how to improve my Neovim workflow.
+
+## Tutorial
+
+Use `:tutor` in helix to start the tutorial.
+
+## Differences between Neovim and Helixer
+
+1. Selecting first, then action.
+   1. Helix: delete 2 word: `2w` then `x`. You can always see what you're selecting before you apply
+      the action.
+   2. Neovim: delete 2 word: `d`. then `2w`. No visual feedback before you apply the action.
+1. Helix - Morden builtin features: LSP, tree-sitter, fuzzy finder, multi cursors, surround and
+   more.
+   1. They're all available in Neovim too, but you need to find and use the right plugins manually,
+      which takes time and effort.
+1. Helix is built in Rust from scratch. The result is a much smaller codebase and a modern set of
+   defaults. No VimScript. No Lua.
+   1. Neovim contains a lot of VimScript, and lua is too dynamic, it's hard to debug.
+   1. Personally I'm glad to take a look at a Rust codebase, but not a VimScript/Lua codebase.
+1. Neovim have a very activate plugin ecosystem, and it's easy to find plugins for almost
+   everything.
+   1. Helix is still new, and it even do have a stable plugin system yet. A PR to add a plugin
+      system is still envolving: <https://github.com/helix-editor/helix/pull/8675>
+1. Neovim has integrated terminal, and it's very powerful. It's quite similar to VSCode's integrated
+   terminal. I use it a lot.
+   1. Helix doesn't have a integrated terminal yet, as it's complicated to implement. Users are
+      recommended to use tmux/Zellij or Wezterm/Kitty to implement this feature instead.
+   1. <https://github.com/helix-editor/helix/issues/1976#issuecomment-1091074719>
+   1. <https://github.com/helix-editor/helix/pull/4649>
+   1. **My Neovim often gets stuck when I switch to
+      [toggleterm.nvim](https://github.com/akinsho/toggleterm.nvim), this Helix issue made me
+      consider to switch from this Neovim plugin to Zellij**.
+1. Helix do not have a tree-view panel, it's recommended to use Yazi/ranger/Broot instead, and open
+   Helix in them.
+   1. a tree-view plugin may be added after the plugin system is stable, but no one knows when it
+      will be.
+   2. and some Helix users stated that they don't need a tree-view plugin, Helix's file picker is
+      useful and good enough.
+1. It seems Helix lacks a global substitution command, you should run it in another window(via wm or
+   Zellij).
+   1. <https://github.com/helix-editor/helix/issues/196>
+   1. Neovim's substitution command allow you to preview the changes before you apply it, and it's
+      very useful. if I switch to Helix, I'll need to find some other tools with similar
+      feature(such as https://github.com/ms-jpq/sad).
+1. Complexity and Maintenance Costs vs Batteries Included:
+   <https://github.com/helix-editor/helix/discussions/6356>
+
+I think Use Helix/Neovim within a terminal file manager(Yazi/ranger/Broot) and Zellij is a good
+idea. It's quite different from the workflow I migrated from VSCode/JetBrains before, I'm very
+interested in it.
+
+In Neovim I can make the workflow similar to VSCode/JetBrains by using some plugins, but Helix
+forces me to get out of my comfort zone, and try something new.
@@ -1,14 +1,14 @@
 # Neovim Editor

-My Neovim config based on [AstroNvim](https://github.com/AstroNvim/AstroNvim).
-For more details, visit the [AstroNvim website](https://astronvim.com/).
+My Neovim config based on [AstroNvim](https://github.com/AstroNvim/AstroNvim). For more details,
+visit the [AstroNvim website](https://astronvim.com/).

-This document outlines neovim's configuration structure and various shortcuts/commands for efficient usage.
+This document outlines neovim's configuration structure and various shortcuts/commands for efficient
+usage.

 ## Screenshots

-![](/_img/astronvim_2023-07-13_00-39.webp)
-![](/_img/hyprland_2023-07-29_2.webp)
+![](/_img/astronvim_2023-07-13_00-39.webp) ![](/_img/hyprland_2023-07-29_2.webp)

 ## Configuration Structure

@@ -47,7 +47,8 @@ just nvim-clear

 ## Cheetsheet

-Here is the cheetsheet related to my Neovim configs. Please read vim's common cheetsheet at [../README.md](../README.md) before reading the following.
+Here is the cheetsheet related to my Neovim configs. Please read vim's common cheetsheet at
+[../README.md](../README.md) before reading the following.

 ### Incremental Selection

@@ -62,15 +63,16 @@ Provided by nvim-treesitter.

 ### Search and Jump

-Provided by [flash.nvim](https://github.com/folke/flash.nvim), it's a intelligent search and jump plugin.
+Provided by [flash.nvim](https://github.com/folke/flash.nvim), it's a intelligent search and jump
+plugin.

-1. It enhaces the default search and jump behavior of neovim.(search with prefix `/`)
+1. It enhances the default search and jump behavior of neovim.(search with prefix `/`)

-| Action            | Shortcut                                                                                                      |
-| ----------------- | ------------------------------------------------------------------------------------------------------------- |
-| Search            | `/`(normal search), `s`(disable all code highlight, only highlight matches)                                   |
-| Treesitter Search | `yR`,`dR`, `cR`, `vR`, `ctrl+v+R`(arround your matches, all the surrounding Treesitter nodes will be labeled) |
-| Remote Flash      | `yr`, `dr`, `cr`, (arround your matches, all the surrounding Treesitter nodes will be labeled)                |
+| Action            | Shortcut                                                                                                     |
+| ----------------- | ------------------------------------------------------------------------------------------------------------ |
+| Search            | `/`(normal search), `s`(disable all code highlight, only highlight matches)                                  |
+| Treesitter Search | `yR`,`dR`, `cR`, `vR`, `ctrl+v+R`(around your matches, all the surrounding Treesitter nodes will be labeled) |
+| Remote Flash      | `yr`, `dr`, `cr`, (around your matches, all the surrounding Treesitter nodes will be labeled)                |

 ### Commands & Shortcuts

@@ -92,12 +94,8 @@ Provided by [flash.nvim](https://github.com/folke/flash.nvim), it's a intelligen

 ### Splitting and Buffers

-|
-| Action | Shortcut |
-| --------------------- | ------------- |
-| Horizontal Split | `\` |
-| Vertical Split | `\|` |
-| Close Buffer | `<Space> + c` |
+| | Action | Shortcut | | --------------------- | ------------- | | Horizontal Split | `\` | |
+Vertical Split | `\|` | | Close Buffer | `<Space> + c` |

 ### Editing and Formatting

@@ -129,10 +127,15 @@ Press `<Space> + D` to view available bindings and options.

 ### Search and Replace Globally

-| Description                                                  | Shortcut                                                         |
-| ------------------------------------------------------------ | ---------------------------------------------------------------- |
-| Open spectre.nvim search and replace panel                   | `<Space> + ss`                                                   |
-| Search and replace in command line(need install `sad` first) | `find -name "*.nix" \| sad '<pattern>' '<replacement>' \| delta` |
+| Description                                | Shortcut       |
+| ------------------------------------------ | -------------- |
+| Open spectre.nvim search and replace panel | `<Space> + ss` |
+
+Search and replace via cli(fd + sad + delta):
+
+```bash
+fd "\\.nix$" . | sad '<pattern>' '<replacement>' | delta
+```

 ### Surrounding Characters

@@ -32,12 +32,6 @@ in {
  home.shellAliases = shellAliases;
  programs.nushell.shellAliases = shellAliases;

-  nixpkgs.config = {
-    programs.npm.npmrc = ''
-      prefix = ''${HOME}/.npm-global
-    '';
-  };
-
  programs = {
    neovim = {
      enable = true;
@@ -0,0 +1,133 @@
+{pkgs, ...}: {
+  nixpkgs.config = {
+    programs.npm.npmrc = ''
+      prefix = ''${HOME}/.npm-global
+    '';
+  };
+
+  home.packages = with pkgs; [
+    #-- c/c++
+    cmake
+    cmake-language-server
+    gnumake
+    checkmake
+    # c/c++ compiler, required by nvim-treesitter!
+    gcc
+    # c/c++ tools with clang-tools, the unwrapped version won't
+    # add alias like `cc` and `c++`, so that it won't conflict with gcc
+    llvmPackages.clang-unwrapped
+    lldb
+
+    #-- python
+    nodePackages.pyright # python language server
+    (python311.withPackages (
+      ps:
+        with ps; [
+          ruff-lsp
+          black # python formatter
+
+          jupyter
+          ipython
+          pandas
+          requests
+          pyquery
+          pyyaml
+
+          ## emacs's lsp-bridge dependenciesge
+          epc
+          orjson
+          sexpdata
+          six
+          setuptools
+          paramiko
+          rapidfuzz
+        ]
+    ))
+
+    #-- rust
+    rust-analyzer
+    cargo # rust package manager
+    rustfmt
+
+    #-- nix
+    nil
+    rnix-lsp
+    # nixd
+    statix # Lints and suggestions for the nix programming language
+    deadnix # Find and remove unused code in .nix source files
+    alejandra # Nix Code Formatter
+
+    #-- golang
+    go
+    gomodifytags
+    iferr # generate error handling code for go
+    impl # generate function implementation for go
+    gotools # contains tools like: godoc, goimports, etc.
+    gopls # go language server
+    delve # go debugger
+
+    # -- java
+    jdk17
+    gradle
+    maven
+    spring-boot-cli
+
+    #-- lua
+    stylua
+    lua-language-server
+
+    #-- bash
+    nodePackages.bash-language-server
+    shellcheck
+    shfmt
+
+    #-- javascript/typescript --#
+    nodePackages.nodejs
+    nodePackages.typescript
+    nodePackages.typescript-language-server
+    # HTML/CSS/JSON/ESLint language servers extracted from vscode
+    nodePackages.vscode-langservers-extracted
+    nodePackages."@tailwindcss/language-server"
+    emmet-ls
+
+    # -- Lisp like Languages
+    guile
+    racket-minimal
+    fnlfmt # fennel
+
+    #-- Others
+    taplo # TOML language server / formatter / validator
+    nodePackages.yaml-language-server
+    sqlfluff # SQL linter
+    actionlint # GitHub Actions linter
+    buf # protoc plugin for linting and formatting
+    proselint # English prose linter
+
+    #-- Misc
+    tree-sitter # common language parser/highlighter
+    nodePackages.prettier # common code formatter
+    marksman # language server for markdown
+    glow # markdown previewer
+    fzf
+    pandoc # document converter
+    hugo # static site generator
+
+    #-- Optional Requirements:
+    gdu # disk usage analyzer, required by AstroNvim
+    (ripgrep.override {withPCRE2 = true;}) # recursively searches directories for a regex pattern
+
+    #-- CloudNative
+    nodePackages.dockerfile-language-server-nodejs
+    # terraform  # install via brew on macOS
+    terraform-ls
+    jsonnet
+    jsonnet-language-server
+    hadolint # Dockerfile linter
+
+    #-- zig
+    zls
+    #-- verilog / systemverilog
+    verible
+    gdb
+  ];
+}
@@ -0,0 +1,31 @@
+# Encryption
+
+We have GnuPG & password-store installed by default, mainly for password management, authentication
+& communication encryption.
+
+We also have LUKS2 for disk encryption on Linux, and [rclone](https://rclone.org/crypt/) for
+cross-platform data encryption & syncing.
+
+[age](https://github.com/FiloSottile/age) may be more general for file encryption.
+
+[Sops](https://github.com/getsops/sops/tree/main) can be used for file encryption too, if you prefer
+using a Cloud provider for key management.
+
+## Asymmetric Encryption
+
+Both age, Sops & GnuPG provide asymmetric encryption, which is useful for encrypting files for a
+specific user.
+
+For morden use, age is recommended, as it use [AEAD encryption function -
+ChaCha20-Poly1305][age Format v1], If you do not want to manage the keys by yourself, Sops is
+recommended, as it use KMS for key management.
+
+## Symmetric Encryption
+
+Both age & GnuPG provide symmetric encryption, which is useful for encrypting files for a specific
+user.
+
+As described in [age Format v1][age Format v1], age use scrypt to encrypt and decrypt the file key
+with a provided passphrase, which is more secure than GnuPG's symmetric encryption.
+
+[age Format v1]: https://age-encryption.org/v1
@@ -0,0 +1,7 @@
+{pkgs, ...}: {
+  home.packages = with pkgs; [
+    age
+    sops
+    rclone
+  ];
+}
@@ -0,0 +1,716 @@
+# GNU Privacy Guard(GnuPG)
+
+> Official Website: https://www.gnupg.org/
+
+The GNU Privacy Guard is a complete and free implementation of the OpenPGP standard as defined by
+RFC4880 (also known as **PGP**). GnuPG allows to encrypt and sign your data and communication,
+features a versatile key management system as well as access modules for all kind of public key
+directories.
+
+> In the following content, we will use GPG to refer to GnuPG tool, and PGP to refer to various
+> concepts defined in the OepnPGP standard(e.g. PGP key, PGP key server).
+
+Key functions of GnuPG:
+
+1. Keypair(keyring) management
+2. Sign and Verify your data
+3. Encrypt and Decrypt your data
+
+Main usage scenarios of GnuPG:
+
+1. Sign or encrypt your email
+   1. Verify or decrypt the email you received
+2. Sign your git commit
+3. Manage your ssh key
+4. Encrypt your data and store it somewhere.
+
+GnuPG/OpenPGP is complex, so while using it, I have been looking forward to finding an encryption
+tool that is simple enough, functional enough, and widely adopted.
+
+Currently I use both age & GnuPG:
+
+1. Age for secrets encryption(ssh key & other secret files), it's simple and easy to use.
+2. GnuPG for password-store and email encryption.
+
+> At present, the safe and efficient use of GPG is probably combined with hardware keys such as
+> yubikey. but I don't have one, so I won't talk about it here.
+
+## Practical Cryptography for Developers
+
+To use GnuGP without seamlessly, Some Practical Cryptography knowledge is required, here is dome
+tutorials:
+
+- English version: <https://github.com/nakov/Practical-Cryptography-for-Developers-Book>
+- Chinese version: <https://thiscute.world/tags/cryptography/>
+
+## Overview of GnuPG
+
+> GnuPG's Official User Guides: <https://www.gnupg.org/documentation/guides.html>
+
+> ArchWiki's GnuPG page: <https://wiki.archlinux.org/title/GnuPG>
+
+### 0. How GnuGP generate & protect your keypair?
+
+Related Docs:
+
+- [2021年，用更现代的方法使用PGP（上）][2021年，用更现代的方法使用PGP（上）]
+- [Predictable, Passphrase-Derived PGP Keys][Predictable, Passphrase-Derived PGP Keys]
+- [OpenPGP - The almost perfect key pair][OpenPGP - The almost perfect key pair]
+
+GnuPG generate every secret key separately, and encrypt them with a symmetric key derived from your
+passphrase. OpenPGP standard defines
+[String-to-Key (S2K)](https://datatracker.ietf.org/doc/html/rfc4880#section-3.7) algorithm to derive
+a symmetric key from your passphrase.
+
+GnuPG's
+[OpenPGP protocol specific options](https://gnupg.org/documentation/manuals/gnupg/OpenPGP-Options.html#OpenPGP-Options)
+shows that:
+
+```
+--s2k-cipher-algo name
+
+    Use name as the cipher algorithm for symmetric encryption with a passphrase if --personal-cipher-preferences and --cipher-algo are not given. The default is AES-128.
+--s2k-digest-algo name
+
+    Use name as the digest algorithm used to mangle the passphrases for symmetric encryption. The default is SHA-1.
+--s2k-mode n
+
+    Selects how passphrases for symmetric encryption are mangled. If n is 0 a plain passphrase (which is in general not recommended) will be used, a 1 adds a salt (which should not be used) to the passphrase and a 3 (the default) iterates the whole process a number of times (see --s2k-count).
+--s2k-count n
+
+    Specify how many times the passphrases mangling for symmetric encryption is repeated. This value may range between 1024 and 65011712 inclusive. The default is inquired from gpg-agent. Note that not all values in the 1024-65011712 range are legal and if an illegal value is selected, GnuPG will round up to the nearest legal value. This option is only meaningful if --s2k-mode is set to the default of 3.
+```
+
+The strongest options should be:
+
+```
+gpg --s2k-mode 3 --s2k-count 65011712 --s2k-digest-algo SHA512 --s2k-cipher-algo AES256 ...
+```
+
+To use the strongest options globally, you can specify these options in your `~/.gnupg/gpg.conf`.
+I've added them to my Home Manager's `programs.gpg.settings` option.
+
+### 1. PGP Key(Primary Key) generation
+
+Key management is the core of OpenPGP standard / GnuPG.
+
+GnuPG uses public-key cryptography so that users may communicate securely. In a public-key system,
+each user has a pair of keys consisting of a private key and a public key. **A user's private key is
+kept secret; it need **never be revealed. The public key may be given to anyone with whom the user
+wants to communicate\*\*. GnuPG uses a somewhat more sophisticated scheme in which a user has a
+primary keypair and then zero or more additional subordinate keypairs. The primary and subordinate
+keypairs are bundled to facilitate key management and the bundle can often be considered simply as
+one keypair, or a keyring/keychain(which contains multiple sub key-pairs).
+
+Let's generate a keypair interactively:
+
+> Now in 2024, GnuPG 2.4.1 defaults to ECC algorithm (9) and Curve 25519 for ECC, which is morden
+> and safe, I would recommend to use these defaults directly.
+
+```bash
+gpg --full-gen-key
+```
+
+This command will ask you for some algorithm related settings(ECC & Curve 25519), your personal
+info, and a strong passphrase to protect your PGP key. e.g.
+
+```bash
+› gpg --full-gen-key
+gpg (GnuPG) 2.4.1; Copyright (C) 2023 g10 Code GmbH
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+gpg: directory '/Users/ryan/.gnupg' created
+Please select what kind of key you want:
+   (1) RSA and RSA
+   (2) DSA and Elgamal
+   (3) DSA (sign only)
+   (4) RSA (sign only)
+   (9) ECC (sign and encrypt) *default*
+  (10) ECC (sign only)
+  (14) Existing key from card
+Your selection? 9
+Please select which elliptic curve you want:
+   (1) Curve 25519 *default*
+   (4) NIST P-384
+   (6) Brainpool P-256
+Your selection? 1
+Please specify how long the key should be valid.
+         0 = key does not expire
+      <n>  = key expires in n days
+      <n>w = key expires in n weeks
+      <n>m = key expires in n months
+      <n>y = key expires in n years
+Key is valid for? (0) 10y
+Key expires at 一  1/ 4 13:50:31 2044 CST
+Is this correct? (y/N) y
+
+GnuPG needs to construct a user ID to identify your key.
+
+Real name:
+Email address:
+Comment:
+You selected this USER-ID:
+    "Ryan Yin (For pass For Work ssh only) <ryan4yin@linux.com>"
+
+Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? O
+We need to generate a lot of random bytes. It is a good idea to perform
+some other action (type on the keyboard, move the mouse, utilize the
+disks) during the prime generation; this gives the random number
+generator a better chance to gain enough entropy.
+We need to generate a lot of random bytes. It is a good idea to perform
+some other action (type on the keyboard, move the mouse, utilize the
+disks) during the prime generation; this gives the random number
+generator a better chance to gain enough entropy.
+gpg: /Users/ryan/.gnupg/trustdb.gpg: trustdb created
+gpg: directory '/Users/ryan/.gnupg/openpgp-revocs.d' created
+gpg: revocation certificate stored as '/Users/ryan/.gnupg/openpgp-revocs.d/C8D84EBC5F82494F432ACEF042E49B284C30A0DA.rev'
+public and secret key created and signed.
+
+pub   ed25519 2024-01-09 [SC] [expires: 2034-01-04]
+      C8D84EBC5F82494F432ACEF042E49B284C30A0DA
+uid                      Ryan Yin (For pass For Work ssh only) <ryan4yin@linux.com>
+sub   cv25519 2024-01-09 [E] [expires: 2034-01-04]
+```
+
+### 2. Configuration Files
+
+> https://www.gnupg.org/documentation/manuals/gnupg/GPG-Configuration.html
+
+The generated keys are stored in `~/.gnupg` by default, the functions of each file are as follows:
+
+```bash
+› tree ~/.gnupg/
+/Users/ryan/.gnupg/
+|-- S.gpg-agent           # socket file
+|-- S.gpg-agent.browser   # socket file
+|-- S.gpg-agent.extra     # socket file
+|-- S.gpg-agent.ssh       # socket file
+|-- S.keyboxd             # socket file
+|-- common.conf              # config file
+|-- openpgp-revocs.d         # Revocation certificates
+|   `-- F680C6D7215674ADEA421CC5E22EC419FF93EA98.rev
+|-- private-keys-v1.d        # private keys with user info & protect by passphrase
+|   |-- 2083133619AB24DC32DA68F9FE83C58D375284E3.key
+|   `-- 9350704F120643C504491E92CA97255223778C8A.key
+|-- public-keys.d            # public keys
+|   |-- pubring.db
+|   `-- pubring.db.lock
+`-- trustdb.gpg              # a trust database
+
+4 directories, 12 files
+```
+
+The functions of most files are quite clear at a glance, but the `trustdb.gpg` in them is a bit
+difficult to understand. Here are the details: <https://www.gnupg.org/gph/en/manual/x334.html>
+
+Home Manager will manage all the things in `~/.gnupg/` EXCEPT `~/.gnupg/openpgp-revocs.d/` and
+`~/.gnupg/private-keys-v1.d/`, which is expected.
+
+### 3. Sub Key Generation & Best Practice
+
+In PGP, every keys has a **usage flag** to indicate its usage:
+
+- `C` means this key can be used to **Certify** other keys, which means this key can be used to
+  **create/delete/revoke/modify** other keys.
+- `S` means this key can be used to **Sign** data.
+- `E` means this key can be used to **Encrypt** data.
+- `A` means this key can be used to **Authenticate** data with various non-GnuPG programs. The key
+  can be used as e.g. an **SSH key**.
+
+The **best practice** is:
+
+1. Generate a primary key with strong cryptography arguments(such as ECC + Curve 25519).
+2. Then generate 3 sub keys with `E`, `S` and `A` usage flag respectively.
+3. **The Primary Key is extremely important**, Backup the primary key to somewhere absolutely
+   safe(such as two encryptd USB drivers, keep them in different places), and then **delete it from
+   your computer immediately**.
+4. The sub key is also important, but you can generate a new one and replace it easily. You can
+   backup it to somewhere else, and import it to another machine to use your keypair.
+5. Backup your Primary key's revocation certificate to somewhere safe, it's the last way to rescure
+   your safety if your primary key is compromised!
+6. It's a big problem if your revocation certificate is compromised, but not the bigest one. because
+   it's only used to revoke your keypair, your data is still safe. But you should generate a new
+   keypair and revoke the old one immediately.
+7. It will be a big problem if your primary key is compromised, and you don't have a revocation
+   certificate to revoke it. But since OpenPGP do not have a good way to distribute revocation
+   certificate, even you have a revocation certificate, it's still hard to distribute it to
+   others...
+
+To keep your keypair safe, you should backup your keypair according to the following steps.
+
+Now let's add the sub keys to the keypair we generated above:
+
+> `E` sub key is already generated by default, so we only need to generate `S` and `A` sub keys.
+
+> GnuPG will ask you to input your passphrase to unlock your primary key.
+
+```bash
+› gpg --expert --edit-key ryan4yin@linux.com
+gpg (GnuPG) 2.4.1; Copyright (C) 2023 g10 Code GmbH
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+Secret key is available.
+
+sec  ed25519/42E49B284C30A0DA
+     created: 2024-01-09  expires: 2034-01-04  usage: SC
+     trust: ultimate      validity: ultimate
+ssb  cv25519/6CB4A81FFB3C99B6
+     created: 2024-01-09  expires: 2034-01-04  usage: E
+[ultimate] (1). Ryan Yin (For pass For Work ssh only) <ryan4yin@linux.com>
+
+gpg> addkey
+Please select what kind of key you want:
+   (3) DSA (sign only)
+   (4) RSA (sign only)
+   (5) Elgamal (encrypt only)
+   (6) RSA (encrypt only)
+   (7) DSA (set your own capabilities)
+   (8) RSA (set your own capabilities)
+  (10) ECC (sign only)
+  (11) ECC (set your own capabilities)
+  (12) ECC (encrypt only)
+  (13) Existing key
+  (14) Existing key from card
+Your selection? 10
+Please select which elliptic curve you want:
+   (1) Curve 25519 *default*
+   (2) Curve 448
+   (3) NIST P-256
+   (4) NIST P-384
+   (5) NIST P-521
+   (6) Brainpool P-256
+   (7) Brainpool P-384
+   (8) Brainpool P-512
+   (9) secp256k1
+Your selection? 1
+Please specify how long the key should be valid.
+         0 = key does not expire
+      <n>  = key expires in n days
+      <n>w = key expires in n weeks
+      <n>m = key expires in n months
+      <n>y = key expires in n years
+Key is valid for? (0) 10y
+Key expires at Mon Jan  4 17:47:24 2044 CST
+Is this correct? (y/N) y
+Really create? (y/N) y
+We need to generate a lot of random bytes. It is a good idea to perform
+some other action (type on the keyboard, move the mouse, utilize the
+disks) during the prime generation; this gives the random number
+generator a better chance to gain enough entropy.
+
+sec  ed25519/42E49B284C30A0DA
+     created: 2024-01-09  expires: 2034-01-04  usage: SC
+     trust: ultimate      validity: ultimate
+ssb  cv25519/6CB4A81FFB3C99B6
+     created: 2024-01-09  expires: 2034-01-04  usage: E
+ssb  ed25519/A42813E03A10F504
+     created: 2024-01-09  expires: 2034-01-04  usage: S
+[ultimate] (1). Ryan Yin (For pass For Work ssh only) <ryan4yin@linux.com>
+
+gpg> addkey
+Please select what kind of key you want:
+   (3) DSA (sign only)
+   (4) RSA (sign only)
+   (5) Elgamal (encrypt only)
+   (6) RSA (encrypt only)
+   (7) DSA (set your own capabilities)
+   (8) RSA (set your own capabilities)
+  (10) ECC (sign only)
+  (11) ECC (set your own capabilities)
+  (12) ECC (encrypt only)
+  (13) Existing key
+  (14) Existing key from card
+Your selection? 11
+
+Possible actions for this ECC key: Sign Authenticate
+Current allowed actions: Sign
+
+   (S) Toggle the sign capability
+   (A) Toggle the authenticate capability
+   (Q) Finished
+
+Your selection? S
+
+Possible actions for this ECC key: Sign Authenticate
+Current allowed actions:
+
+   (S) Toggle the sign capability
+   (A) Toggle the authenticate capability
+   (Q) Finished
+
+Your selection? A
+
+Possible actions for this ECC key: Sign Authenticate
+Current allowed actions: Authenticate
+
+   (S) Toggle the sign capability
+   (A) Toggle the authenticate capability
+   (Q) Finished
+
+Your selection? Q
+Please select which elliptic curve you want:
+   (1) Curve 25519 *default*
+   (2) Curve 448
+   (3) NIST P-256
+   (4) NIST P-384
+   (5) NIST P-521
+   (6) Brainpool P-256
+   (7) Brainpool P-384
+   (8) Brainpool P-512
+   (9) secp256k1
+Your selection? 1
+Please specify how long the key should be valid.
+         0 = key does not expire
+      <n>  = key expires in n days
+      <n>w = key expires in n weeks
+      <n>m = key expires in n months
+      <n>y = key expires in n years
+Key is valid for? (0) 10y
+Key expires at Mon Jan  4 17:48:27 2044 CST
+Is this correct? (y/N) y
+Really create? (y/N) y
+We need to generate a lot of random bytes. It is a good idea to perform
+some other action (type on the keyboard, move the mouse, utilize the
+disks) during the prime generation; this gives the random number
+generator a better chance to gain enough entropy.
+
+sec  ed25519/42E49B284C30A0DA
+     created: 2024-01-09  expires: 2034-01-04  usage: SC
+     trust: ultimate      validity: ultimate
+ssb  cv25519/6CB4A81FFB3C99B6
+     created: 2024-01-09  expires: 2034-01-04  usage: E
+ssb  ed25519/A42813E03A10F504
+     created: 2024-01-09  expires: 2034-01-04  usage: S
+ssb  ed25519/5469C4FACC81B60F
+     created: 2024-01-09  expires: 2034-01-04  usage: A
+[ultimate] (1). Ryan Yin (For pass For Work ssh only) <ryan4yin@linux.com>
+
+gpg> save
+```
+
+Check the secret keys and public keys we generated:
+
+```bash
+› gpg --list-secret-keys --with-subkey-fingerprint
+[keyboxd]
+---------
+sec   ed25519 2024-01-09 [SC] [expires: 2034-01-04]
+      C8D84EBC5F82494F432ACEF042E49B284C30A0DA
+uid           [ultimate] Ryan Yin (For pass For Work ssh only) <ryan4yin@linux.com>
+ssb   cv25519 2024-01-09 [E] [expires: 2034-01-04]
+      1146D48B93C2177C92D186026CB4A81FFB3C99B6
+ssb   ed25519 2024-01-09 [S] [expires: 2034-01-04]
+      DF64002A822948B17783BBB1A42813E03A10F504
+ssb   ed25519 2024-01-09 [A] [expires: 2034-01-04]
+      65E2C6C1C3559362ABB7047C5469C4FACC81B60F
+
+› gpg --list-public-keys
+...
+```
+
+### 4. Backup & Restore
+
+Export Public Keys(Both Primary Key & Sub Keys):
+
+```bash
+gpg --armor --export ryan4yin@linux.com > ryan4yin-gpg-keys.pub
+# check what we have exported, we should see 4 public keys
+nix run nixpkgs#pgpdump ryan4yin-gpg-keys.pub
+```
+
+Export Primary Key(The exported key is still encrypted by your passphrase):
+
+> the `!` at the end of the key ID is to force GnuPG to export only the specified key, not the
+> subkeys.
+
+> GnuPG will ask you to input your passphrase to unlock your keypair, because GnuPG need to convert
+> the secret key's format from its internal protection format to the one specified by the OpenPGP
+> protocol.
+
+```bash
+# replace the key ID with your own sec key's ID
+gpg --armor --export-secret-keys C8D84EBC5F82494F432ACEF042E49B284C30A0DA! > ryan4yin-primary-key.priv
+
+# Check the exported primary key's detail info,
+nix run nixpkgs#pgpdump ryan4yin-primary-key.priv
+...
+Old: Secret Key Packet(tag 5)(134 bytes)
+        Ver 4 - new
+        Public key creation time - Sat Jan 27 14:13:13 CST 2024
+        Pub alg - EdDSA Edwards-curve Digital Signature Algorithm(pub 22)
+        Elliptic Curve - Ed25519 (0x2B 06 01 04 01 DA 47 0F 01)
+        EdDSA Q(263 bits) - ...
+        Sym alg - AES with 128-bit key(sym 7)
+        Iterated and salted string-to-key(s2k 3):
+                Hash alg - SHA1(hash 2)
+                Salt - 8c 78 58 c0 87 83 8c 2c
+                Count - 65011712(coded count 255)
+        IV - xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx
+        Encrypted EdDSA x
+        Encrypted SHA1 hash
+...
+```
+
+As [Predictable, Passphrase-Derived PGP Keys][Predictable, Passphrase-Derived PGP Keys] says, we'll
+find that gpg ignored the `--s2k-count` option we specified when generating the keypair, and the
+`--s2k` related options we specified in `~/.gnupg/gpg.conf`, the exported primary key is protectd by
+`SHA1` and `AES128`, which is not secure enough!
+
+So to increase the security of the exported primary key, we need to encrypt it again with a stronger
+algorithm, I choose `age` here(which use `scrypt` to encrypt the file key with a provided
+passphrase):
+
+```bash
+# for simplicity, use the same passphrase as your gpg keypair here
+age --passphrase -o ryan4yin-primary-key.priv.age ryan4yin-primary-key.priv
+rm ryan4yin-primary-key.priv
+```
+
+Export Sub Keys one by one(The exported keys is still encrypted by your passphrase):
+
+```bash
+gpg --armor --export-secret-subkeys > ryan4yin-gpg-subkeys.priv
+
+# Check the exported primary key's detail info,
+nix run nixpkgs#pgpdump ryan4yin-gpg-subkeys.priv
+
+# encrypt it again with age(scrypt)
+age --passphrase  -o ryan4yin-gpg-subkeys.priv.age ryan4yin-gpg-subkeys.priv
+rm ryan4yin-gpg-subkeys.priv
+```
+
+Your can import the exported Private Key via `gpg --import <keyfile>` to restore it, but you need to
+decrypt it via age first.
+
+As for Public Keys, please import your publicKeys via Home Manager's `programs.gpg.publicKeys`
+option, DO NOT import it manually(via `gpg --import <keyfile>`).
+
+To ensure security, delete the master key and revoke the certificate immediately after the backup is
+completed:
+
+```bash
+# delete the primary key and all its sub keys
+gpg --delete-secret-keys ryan4yin@linux.com
+
+# delete the revocation certificate
+rm ~/.gnupg/openpgp-revocs.d/C8D84EBC5F82494F432ACEF042E49B284C30A0DA.rev
+
+# import our subkeys back
+age --decrypt -o ryan4yin-primary-key.priv ryan4yin-primary-key.priv.age
+gpg --import ryan4yin-gpg-subkeys.priv
+```
+
+Now check the secret keys and public keys again:
+
+> A `#` at the end of the key ID means that the key is not available, because we have deleted it.
+
+```bash
+› gpg --list-secret-keys --keyid-format=long
+/home/ryan/.gnupg/pubring.kbx
+-----------------------------
+sec#  ed25519/D1C5FFA3118A41FC 2024-01-09 [SC] [expires: 2034-01-04]
+      Key fingerprint = E267 943C 33AD C5AF 3D76  4D96 D1C5 FFA3 118A 41FC
+uid                 [ unknown] Ryan Yin (Personal) <ryan4yin@linux.com>
+ssb   cv25519/62526A4A0CF43E33 2024-01-09 [E] [expires: 2034-01-04]
+ssb   ed25519/433A66D63805BD1A 2024-01-09 [S] [expires: 2034-01-04]
+ssb   ed25519/441E3D8FBD313BF2 2024-01-09 [A] [expires: 2034-01-04]
+
+
+› gpg --list-public-keys --keyid-format=long
+/home/ryan/.gnupg/pubring.kbx
+-----------------------------
+pub   ed25519/D1C5FFA3118A41FC 2024-01-09 [SC] [expires: 2034-01-04]
+      Key fingerprint = E267 943C 33AD C5AF 3D76  4D96 D1C5 FFA3 118A 41FC
+uid                 [ unknown] Ryan Yin (Personal) <ryan4yin@linux.com>
+sub   cv25519/62526A4A0CF43E33 2024-01-09 [E] [expires: 2034-01-04]
+sub   ed25519/433A66D63805BD1A 2024-01-09 [S] [expires: 2034-01-04]
+sub   ed25519/441E3D8FBD313BF2 2024-01-09 [A] [expires: 2034-01-04]
+```
+
+### 5. Signing & Verification
+
+```bash
+#  Make a cleartext signature.
+gpg --clearsign <file>
+
+# Make a detached signature, with text output.
+gpg --armor --detach-sign <file>
+
+# verify the file contains a valid signature.
+gpg --verify <file>
+
+# verify the file with a detached signature.
+gpg --verify <file> <signature-file>
+```
+
+### 6. Encryption & Decryption
+
+```bash
+# Encrypt a file via recipient's public key, sign it via your private key for signing, and output cleartext.
+# so that the reciiptent can decrypt it via his/her private key.
+gpg --armor --sign --encrypt --recipient ryan4yin@linux.com <file>
+# or use this short version
+gpg -aser ryan4yin@linux.com <file>
+
+# Descrypt a file via your private key, and verify the signature via the sender's public key.
+gpg --decrypt <file>
+# or
+gpg -d <file>
+```
+
+If you just want to encrypt/decrypt a file quickly, you can use `age` with a passphrase, `gpg` can
+also do this, but it's not recommended(as age(scrypt)'s more secure):
+
+```bash
+# Encrypt a file via symmetric encryption(AES256), and output cleartext.
+gpg --armor --symmetric --cipher-algo AES256 <file>
+# or
+gpg -ac <file>
+
+# Decrypt a file via symmetric encryption.
+gpg --decrypt <file>
+# or
+gpg -d <file>
+```
+
+### 7. Public Key Exchange & Revocation
+
+In the case of many users, it is very difficult to exchange public keys securely and reliably with
+each other. In the Web world, There is a **Chain of Trust\*\*** to resolve this problem:
+
+- A Certificate Authority(CA) is responsible to verify & sign all the certificate signing request.
+- Web Server can safely transmit its Web Certificate to the client via TLS protocol.
+- Client can verify the received Web Certificate via the CA's root certificate(which is built in
+  Browser/OS).
+
+But in OpenPGP:
+
+- There is key servers to distribute(exchange) public keys, but it **do not verify the identity of
+  the key owner**, and any uploaded data is **not allowed to be deleted**. Which make it **insecure
+  and dangerous**.
+  - Why key server is dangerous?
+    - Many PGP novices follow various tutorials to upload various key with personal privacy (such as
+      real names) to the public key server, and then find that they can't delete them, which is very
+      embarrassing.
+    - Anyone can upload a key to the key server, and claim that it is the key of a certain
+      person(such as Linus), which is very insecure.
+  - **key server** is not recommend to use.
+- GnuPG will generate revocation certificate when generating
+  keypair(`~/.gnupg/private-keys-v1.d/<Key-ID.rev>`), anyone can import this certificate to revoke
+  the keypair. But OpenPGP standard **DO NOT provide a way to distribute this certificate to
+  others**.
+  - Not to mention some key status query protocol like OCSP in Web PKI.
+  - Users has to pulish their revocation certificate to their blog, github profile or somewhere
+    else, and others has to check it and run `gpg --import <revocation-certificate>` to revoke the
+    keypair manually.
+
+In summary, **there is no good way to distribute public keys and revoke them in OpenPGP**, which is
+a big problem.
+
+Currently, You have to distribute your public key or revocation certificate via your blog, github
+profile, or somewhere else, and others has to check it and run `gpg --import` to import your public
+key or revocation certificate manually.
+
+Anyway, let's try to revoke a keypair:
+
+```bash
+› gpg --list-keys
+gpg: checking the trustdb
+gpg: marginals needed: 3  completes needed: 1  trust model: pgp
+gpg: depth: 0  valid:   1  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 1u
+/home/ryan/.gnupg/pubring.kbx
+-----------------------------
+pub   ed25519/0x55859965C2742B4B 2024-01-09 [SC]
+      Key fingerprint = A2CD 07BD 9631 44CB 2725  5A6B 5585 9965 C274 2B4B
+uid                   [ultimate] test <test@test.t>
+sub   cv25519/0x9E78E897B6490D6B 2024-01-09 [E]
+
+# encrypt some file before revoke the keypair
+› gpg -aer test@test.t README.md > README.md.asc
+
+# try to decrypt the file, it should works
+› gpg -d README.md.asc
+gpg: encrypted with cv25519 key, ID 0x9E78E897B6490D6B, created 2024-01-09
+      "test <test@test.t>"
+# ......
+
+# take a look at the revocation certificate
+› cat gpg-test-revoke.rev
+This is a revocation certificate for the OpenPGP key:
+
+pub   ed25519/0x55859965C2742B4B 2024-01-09 [S]
+      Key fingerprint = A2CD 07BD 9631 44CB 2725  5A6B 5585 9965 C274 2B4B
+uid                            test <test@test.t>
+
+A revocation certificate is a kind of "kill switch" to publicly
+declare that a key shall not anymore be used.  It is not possible
+to retract such a revocation certificate once it has been published.
+
+Use it to revoke this key in case of a compromise or loss of
+the secret key.  However, if the secret key is still accessible,
+it is better to generate a new revocation certificate and give
+a reason for the revocation.  For details see the description of
+of the gpg command "--generate-revocation" in the GnuPG manual.
+
+To avoid an accidental use of this file, a colon has been inserted
+before the 5 dashes below.  Remove this colon with a text editor
+before importing and publishing this revocation certificate.
+
+:-----BEGIN PGP PUBLIC KEY BLOCK-----
+Comment: This is a revocation certificate
+
+iHgEIBYKACAWIQSizQe9ljFEyyclWmtVhZllwnQrSwUCZZ1T9wIdAAAKCRBVhZll
+wnQrS2LVAQCegRF1qPqY/OCS5QCz8G0ra0XgPYlQYo9pSOjHgfY39AD+Psin2/6t
+STuJCp+gru6OtbTCu8Y2LugQeDh7UicM7Ak=
+=Xfs6
+-----END PGP PUBLIC KEY BLOCK-----
+```
+
+As the revocation certificate says, we need to remove the first colon(`:`) before the 5
+dashes(`-----BEGIN PGP PUBLIC KEY BLOCK-----`), then import it:
+
+```bash
+› gpg --import gpg-test-revoke.rev
+gpg: key 0x55859965C2742B4B: "test <test@test.t>" revocation certificate imported
+gpg: Total number processed: 1
+gpg:    new key revocations: 1
+gpg: no ultimately trusted keys found
+
+› gpg --list-secret-keys --keyid-format=long
+/home/ryan/.gnupg/pubring.kbx
+-----------------------------
+sec   ed25519/55859965C2742B4B 2024-01-09 [SC] [revoked: 2024-01-09]
+      Key fingerprint = A2CD 07BD 9631 44CB 2725  5A6B 5585 9965 C274 2B4B
+uid                 [ revoked] test <test@test.t>
+
+
+# try to decrypt the file, it still works, but will indicate that the key is revoked.
+› gpg -d README.md.asc
+gpg: encrypted with cv25519 key, ID 0x9E78E897B6490D6B, created 2024-01-09
+      "test <test@test.t>"
+gpg: Note: key has been revoked
+gpg: reason for revocation: No reason specified
+# ......
+
+# try to encrypt some file via the revoked key, it will fail.
+› gpg -aer 9E78E897B6490D6B README.md
+gpg: 9E78E897B6490D6B: skipped: Unusable public key
+gpg: README.md: encryption failed: Unusable public key
+```
+
+But if you delete the `trustdb.gpg` and `pubring.kbx`, then import the revoked public key again, it
+will be valid and usable again... which is very dangerous.
+
+## References
+
+- [2021年，用更现代的方法使用PGP（上）][2021年，用更现代的方法使用PGP（上）]
+- [Predictable, Passphrase-Derived PGP Keys][Predictable, Passphrase-Derived PGP Keys]
+- [OpenPGP - The almost perfect key pair][OpenPGP - The almost perfect key pair]
+
+[2021年，用更现代的方法使用PGP（上）]:
+  https://ulyc.github.io/2021/01/13/2021%E5%B9%B4-%E7%94%A8%E6%9B%B4%E7%8E%B0%E4%BB%A3%E7%9A%84%E6%96%B9%E6%B3%95%E4%BD%BF%E7%94%A8PGP-%E4%B8%8A/
+[Predictable, Passphrase-Derived PGP Keys]: https://nullprogram.com/blog/2019/07/10/
+[OpenPGP - The almost perfect key pair]:
+  https://blog.eleven-labs.com/en/openpgp-almost-perfect-key-pair-part-1/
@@ -0,0 +1,83 @@
+{
+  config,
+  mysecrets,
+  ...
+}: {
+  programs.gpg = {
+    enable = true;
+    homedir = "${config.home.homeDirectory}/.gnupg";
+    #  $GNUPGHOME/trustdb.gpg stores all the trust level you specified in `programs.gpg.publicKeys` option.
+    #
+    # If set `mutableTrust` to false, the path $GNUPGHOME/trustdb.gpg will be overwritten on each activation.
+    # Thus we can only update trsutedb.gpg via home-manager.
+    mutableTrust = false;
+
+    # $GNUPGHOME/pubring.kbx stores all the public keys you specified in `programs.gpg.publicKeys` option.
+    #
+    # If set `mutableKeys` to false, the path $GNUPGHOME/pubring.kbx will become an immutable link to the Nix store, denying modifications.
+    # Thus we can only update pubring.kbx via home-manager
+    mutableKeys = false;
+    publicKeys = [
+      # https://www.gnupg.org/gph/en/manual/x334.html
+      {
+        source = "${mysecrets}/public/ryan4yin-gpg-keys-2014-01-27.pub";
+        trust = 5;
+      } # ultimate trust, my own keys.
+    ];
+
+    # This configuration is based on the tutorial below, it allows for a robust setup
+    # https://blog.eleven-labs.com/en/openpgp-almost-perfect-key-pair-part-1
+    # ~/.gnupg/gpg.conf
+    settings = {
+      # Get rid of the copyright notice
+      no-greeting = true;
+
+      # Disable inclusion of the version string in ASCII armored output
+      no-emit-version = true;
+      # Do not write comment packets
+      no-comments = false;
+      # Export the smallest key possible
+      # This removes all signatures except the most recent self-signature on each user ID
+      export-options = "export-minimal";
+
+      # Display long key IDs
+      keyid-format = "0xlong";
+      # List all keys (or the specified ones) along with their fingerprints
+      with-fingerprint = true;
+
+      # Display the calculated validity of user IDs during key listings
+      list-options = "show-uid-validity";
+      verify-options = "show-uid-validity show-keyserver-urls";
+
+      # Select the strongest cipher
+      personal-cipher-preferences = "AES256";
+      # Select the strongest digest
+      personal-digest-preferences = "SHA512";
+      # This preference list is used for new keys and becomes the default for "setpref" in the edit menu
+      default-preference-list = "SHA512 SHA384 SHA256 RIPEMD160 AES256 TWOFISH BLOWFISH ZLIB BZIP2 ZIP Uncompressed";
+
+      # Use the strongest cipher algorithm
+      cipher-algo = "AES256";
+      # Use the strongest digest algorithm
+      digest-algo = "SHA512";
+      # Message digest algorithm used when signing a key
+      cert-digest-algo = "SHA512";
+      # Use RFC-1950 ZLIB compression
+      compress-algo = "ZLIB";
+
+      # Disable weak algorithm
+      disable-cipher-algo = "3DES";
+      # Treat the specified digest algorithm as weak
+      weak-digest = "SHA1";
+
+      # The cipher algorithm for symmetric encryption for symmetric encryption with a passphrase
+      s2k-cipher-algo = "AES256";
+      # The digest algorithm used to mangle the passphrases for symmetric encryption
+      s2k-digest-algo = "SHA512";
+      # Selects how passphrases for symmetric encryption are mangled
+      s2k-mode = "3";
+      # Specify how many times the passphrases mangling for symmetric encryption is repeated
+      s2k-count = "65011712";
+    };
+  };
+}
@@ -0,0 +1,46 @@
+# Password Manager
+
+- https://www.passwordstore.org/
+- [awesome-password-store](https://github.com/tijn/awesome-password-store)
+- <https://github.com/gopasspw/gopass>: reimplement in go, with more features.
+- Clients
+  - Android: <https://github.com/android-password-store/Android-Password-Store>
+  - Brosers(Chrome/Firefox): <https://github.com/browserpass/browserpass-extension>
+
+## How to change the gpg key of the pass password store?
+
+To ensure security, we should change the GPG key every two or three years. Here is how to do this.
+
+1. Create a new GPG key pair and backup it to a safe place.
+2. Ensure you can access both the old and new GPG keys.
+3. Update `./default.nix` to use the new GPG sub keys.
+4. Check which Key `pass` currently uses:
+
+   ```bash
+   cd ~/.local/share/password-store/
+   # check which key is used by pass
+   cat .gpg-id
+   # check which key is really used to encrypt the password
+   gpg --list-packets path/to/any/password.gpg
+   ```
+
+5. Change the key used by `pass`:
+   ```bash
+   # change the key used by pass, see `man pass` for more details
+   # you will be asked to enter the password of both the new and old keys
+   # then pass will re-encrypt all the passwords with the new key
+   pass init <new-key-id>
+   ```
+6. Check if the key is changed:
+   ```bash
+   # check which key is used by pass
+   cat .gpg-id
+   # check which key is really used to encrypt the password
+   gpg --list-packets path/to/any/password.gpg
+   ```
+7. Delete the old GPG key pair:
+   ```bash
+   # delete the old key pair
+   gpg --delete-secret-keys <old-key-id>
+   gpg --delete-keys <old-key-id>
+   ```
@@ -0,0 +1,52 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}: let
+  passwordStoreDir = "${config.xdg.dataHome}/password-store";
+in {
+  programs.password-store = {
+    enable = true;
+    package = pkgs.pass.withExtensions (exts: [
+      # support for one-time-password (OTP) tokens
+      # NOTE: Saving the password and OTP together runs counter to the purpose of secondary verification!
+      # exts.pass-otp
+
+      exts.pass-import # a generic importer tool from other password managers
+      exts.pass-update # an easy flow for updating passwords
+    ]);
+    # See the “Environment variables” section of pass(1) and the extension man pages for more information about the available keys.
+    settings = {
+      PASSWORD_STORE_DIR = passwordStoreDir;
+      # Overrides the default gpg key identification set by init.
+      # Hexadecimal key signature is recommended.
+      # Multiple keys may be specified separated by spaces.
+      PASSWORD_STORE_KEY = lib.strings.concatStringsSep " " [
+        "EF824EB73CFD6CC7" # E - Ryan Yin (For pass & ssh only) <ryan4yin@linux.com>
+      ];
+      # all .gpg-id files and non-system extension files must be signed using a detached signature using the GPG key specified by
+      #   the full 40 character upper-case fingerprint in this variable.
+      # If multiple fingerprints are specified, each separated by a whitespace character, then signatures must match at least one.
+      # The init command will keep signatures of .gpg-id files up to date.
+      PASSWORD_STORE_SIGNING_KEY = lib.strings.concatStringsSep " " [
+        "C2A313F98166C942" # S - Ryan Yin (For pass & ssh only) <ryan4yin@linux.com>
+      ];
+      PASSWORD_STORE_CLIP_TIME = "60";
+      PASSWORD_STORE_GENERATED_LENGTH = "15";
+      PASSWORD_STORE_ENABLE_EXTENSIONS = "true";
+    };
+  };
+
+  # password-store extensions for browsers
+  # you need to install the browser extension for this to work
+  # https://github.com/browserpass/browserpass-extension
+  programs.browserpass = {
+    enable = true;
+    browsers = [
+      "chrome"
+      "chromium"
+      "firefox"
+    ];
+  };
+}
@@ -1,5 +1,5 @@
 {pkgs-unstable, ...}: let
-  nu_scripts = pkgs-unstable.nu_scripts;
+  inherit (pkgs-unstable) nu_scripts;
 in {
  programs.bash = {
    # load the alias file for work
@@ -4,12 +4,12 @@
  programs.ssh = {
    enable = true;

-    # all my ssh private key are generated by `ssh-keygen -t ed25519 -C "ryan@nickname"`
-    # the config's format:
+    # All my ssh private key are generated by `ssh-keygen -t ed25519 -a 256 -C "xxx@xxx"`
+    # Config format:
    #   Host —  given the pattern used to match against the host name given on the command line.
    #   HostName — specify nickname or abbreviation for host
    #   IdentityFile — the location of your SSH key authentication file for the account.
-    # format in details:
+    # Format in details:
    #   https://www.ssh.com/academy/ssh/config
    extraConfig = ''
      # a private key that is used during authentication will be added to ssh-agent if it is running
@@ -36,18 +36,6 @@
      Host s500plus
        HostName 192.168.5.174
        Port 22
-
-      Host k8s-main
-        HostName 192.168.5.181
-        ForwardAgent yes
-
-      Host k8s-data1
-        HostName 192.168.5.182
-        ForwardAgent yes
-
-      Host k8s-data2
-        HostName 192.168.5.183
-        ForwardAgent yes
    '';
  };
 }
@@ -0,0 +1,47 @@
+# Zellij - A workspace lives in your terminal
+
+Zellij is a terminal workspace with batteries included. At its core, it is a terminal multiplexer
+(similar to tmux and screen), but this is merely its infrastructure layer.
+
+Zellij is very user-friendly and easy to use, with a step-by-step hint system that will help you get
+to know the keybindings, which is very like the Neovim or helix.
+
+> By contrast, tmux's key design is counterintuitive, there is no prompt system, and the plug-in
+> performance is rubbish. It's really a pain to use. tmux's initial release was in 2007, it's too
+> old, I would recommend any users that do not have a experience with multiplexer to use zellij
+> instead of tmux.
+
+## Why use zellij as the default terminal environment?
+
+By auto start zellij on shell login, and exit the shell session on zellij exit, we can use zellij as
+the default terminal environment.
+
+By this way, We will only use the most basic features of the terminal
+emulator(kitty/alacritty/wezterm/...), while most of the functions of terminal are provided by
+zellij. Thus we can easily switch to any terminal emulator without losing any key functions, and do
+not need to take care of the differences between different terminal emulators.
+
+And Zellij can be used not only locally, but also on any remote server, which is very convenient.
+Learn once and use everywhere!
+
+> Yeah, you didn't misread it, zellij is very suitable for not only remotely, but also locally!
+
+Some features such as search/copy/scrollback in different terminal emulators are implemented in
+different ways, and has different user experience. For example, Wezterm's default search function is
+very basic, and it's not easy to use. Kitty's scrollback search/copy is really tricky to use. As for
+some Editor such as Neovim, its integrated terminal is really useful, but zellij is more powerful
+and useful than it, and more stable! Zellij overcomes these problems, and provides a unified user
+experience for all terminal emulators!
+
+Terminal emulators should only be responsible for displaying characters.
+
+## Passthrough mode(Lock Mode)
+
+`Ctrl + g` lock the outer zellij interface, and all keys will be sent to the focused pane.
+
+It's extremely useful when you want to:
+
+1. Use zellij locally for daily work, and use a remote zellij via ssh to do some work on the remote
+   server.
+1. To avoid the key conflicts between zellij and the program running in the terminal, such as vim,
+   tmux, etc.
@@ -9,7 +9,8 @@ in {
  # auto start zellij in nushell
  programs.nushell.extraConfig = ''
    # auto start zellij
-    if not "ZELLIJ" in $env {
+    # except when in emacs or zellij itself
+    if (not ("ZELLIJ" in $env)) and (not ("INSIDE_EMACS" in $env)) {
      if "ZELLIJ_AUTO_ATTACH" in $env and $env.ZELLIJ_AUTO_ATTACH == "true" {
        ^zellij attach -c
      } else {
@@ -1,6 +1,6 @@
 # Home Manager's Darwin Submodules

 1. `core.nix`: some basic configuration.
+2. `shell.nix`: shell related.
 3. `rime-squirrel.nix`: [rime-squirrel](https://github.com/rime/squirrel)'s configuration.
 4. `default.nix`: the entrypoint of darwin's configuration, it import all the submodules above.
-
@@ -1,3 +1,3 @@
-{username, ...}: {
-  home.homeDirectory = "/Users/${username}";
+{myvars, ...}: {
+  home.homeDirectory = "/Users/${myvars.username}";
 }
@@ -2,8 +2,9 @@
  imports =
    (mylib.scanPaths ./.)
    ++ [
-      ../base/server
-      ../base/desktop
-      ../base/core.nix
+      ../base/core
+      ../base/tui
+      ../base/gui
+      ../base/home.nix
    ];
 }
@@ -1,6 +1,24 @@
 let
  envExtra = ''
-    export PATH="/opt/homebrew/bin:/usr/local/bin:$PATH"
+    export PATH="$PATH:/opt/homebrew/bin:/usr/local/bin"
+  '';
+  # copied from the content generated by `conda init bash`
+  initExtra = ''
+    arch=$(uname -m)
+
+    if [ "aarch64" = "$arch" ] ||  [ "arm64" = "$arch" ]; then
+      # >>> (miniforge)conda initialize >>>
+      # !! Contents within this block are managed by 'conda init' !!
+      if [ -f "/opt/homebrew/Caskroom/miniforge/base/etc/profile.d/conda.sh" ]; then
+          . "/opt/homebrew/Caskroom/miniforge/base/etc/profile.d/conda.sh"
+      else
+          export PATH="/opt/homebrew/Caskroom/miniforge/base/bin:$PATH"
+      fi
+      # <<< conda initialize <<<
+    elif [[ "x86_64" = "$arch" ]]; then
+      # do nothing
+      true
+    fi
  '';
 in {
  # Homebrew's default install location:
@@ -10,10 +28,10 @@ in {
  # in /opt/homebrew for Apple Silicon and /usr/local for Rosetta 2 to coexist and use bottles.
  programs.bash = {
    enable = true;
-    bashrcExtra = envExtra;
+    bashrcExtra = envExtra + initExtra;
  };
  programs.zsh = {
    enable = true;
-    envExtra = envExtra;
+    inherit envExtra initExtra;
  };
 }
@@ -0,0 +1,3 @@
+{myvars, ...}: {
+  programs.ssh.extraConfig = myvars.networking.ssh.extraConfig;
+}
@@ -2,7 +2,9 @@

 1. `base`: The base module that is suitable for any NixOS environment.
 2. `desktop`: Configuration for desktop environments, such as Hyprland, I3, etc.
-6. `server.nix`: Configuration which is suitable for both servers and desktops. It import only `base` as its submodule.
-    1. used by all my nixos servers.
-7. `desktop.nix`: the entrypoint of desktop's configuration, it import both `base` and `desktop` as its submodules.
-    1. used by all my nixos desktops.
+3. `server.nix`: Configuration which is suitable for both servers and desktops. It import only
+   `base` as its submodule.
+   1. used by all my nixos servers.
+4. `desktop.nix`: the entrypoint of desktop's configuration, it import both `base` and `desktop` as
+   its submodules.
+   1. used by all my nixos desktops.
@@ -1,13 +1,13 @@
 {
  config,
-  username,
+  myvars,
  ...
 }: let
  d = config.xdg.dataHome;
  c = config.xdg.configHome;
  cache = config.xdg.cacheHome;
 in rec {
-  home.homeDirectory = "/home/${username}";
+  home.homeDirectory = "/home/${myvars.username}";

  # environment variables that always set at login
  home.sessionVariables = {
@@ -1,37 +1,14 @@
 {pkgs, ...}: {
  # Linux Only Packages, not available on Darwin
  home.packages = with pkgs; [
-    nmon
-    iotop
-    iftop
-
    # misc
    libnotify
    wireguard-tools # manage wireguard vpn manually, via wg-quick
-
-    # system call monitoring
-    strace # system call monitoring
-    ltrace # library call monitoring
-    bpftrace # powerful tracing tool
-    tcpdump # network sniffer
-    lsof # list open files
-
-    # system tools
-    sysstat
-    lm_sensors # for `sensors` command
-    ethtool
-    pciutils # lspci
-    usbutils # lsusb
-    hdparm # for disk performance, command
-    dmidecode # a tool that reads information about your system's hardware from the BIOS according to the SMBIOS/DMI standard
  ];

  # auto mount usb drives
  services = {
    udiskie.enable = true;
-  };
-
-  services = {
    # syncthing.enable = true;
  };
 }
@@ -0,0 +1,8 @@
+{
+  imports = [
+    ../base/core
+    ../base/home.nix
+
+    ./base
+  ];
+}
@@ -1,10 +0,0 @@
-{
-  imports = [
-    ../base/server
-    ../base/desktop
-    ../base/core.nix
-
-    ./base
-    ./desktop
-  ];
-}
--- a/Show More
+++ b/Show More