feat: refactor codes

feat: custom rime - disable full_shape punctuations
feat: remap capslock key

home/linux/desktop/default.nix

@@ -4,7 +4,10 @@
     ./alacritty
   
     ./creative.nix
+    ./immutable-file.nix
     ./media.nix
+    ./ssh.nix
+    ./xdg.nix
   ];
 
   home.packages = with pkgs; [

home/linux/desktop/immutable-file.nix

@@ -0,0 +1,64 @@
+{ config
+, lib
+, pkgs
+, ...
+}:
+
+##############################################################################################
+#
+#  Provide a option `home.immutable-file`, it works like `home.file` but make the generated file immutable.
+#
+#  Copy from https://github.com/iosmanthus/nixos-config/blob/349917b/modules/immutable-file.nix
+#
+#  this module use the `chattr +i` to make the file immutable, `i` indicates `immutable`, 
+#  it's a i-node flags only works on Linux.
+# 
+#  TODO not used yet, need to test it.
+# 
+##############################################################################################
+
+with lib;
+let
+  cfg = config.home.immutable-file;
+  immutableFileOpts = { ... }: {
+    options = {
+      src = mkOption {
+        type = types.path;
+      };
+      dst = mkOption {
+        type = types.path;
+      };
+    };
+  };
+  mkImmutableFile = pkgs.writeScript "make_immutable_file" ''
+    # $1: dst
+    # $2: src
+    if [ ! -d "$(dirname $1)" ]; then
+      mkdir -p $1
+    fi
+
+    if [ -f $1 ]; then
+        sudo chattr -i $1
+    fi
+
+    sudo cp $2 $1
+    sudo chattr +i $1
+  '';
+in
+{
+  options.home.immutable-file = mkOption {
+    type = with types; attrsOf (submodule immutableFileOpts);
+    default = { };
+  };
+
+  config = mkIf (cfg != { }) {
+    home.activation = mapAttrs'
+      (name: { src, dst }:
+        nameValuePair
+          "make-immutable-${name}"
+          (lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+            ${mkImmutableFile} ${dst} ${src}
+          ''))
+      cfg;
+  };
+}

home/linux/desktop/ssh.nix

@@ -0,0 +1,50 @@
+{ pkgs
+, ...
+}: {
+  programs.ssh = {
+    enable = true;
+
+    # all my ssh private key are generated by `ssh-keygen -t ed25519 -C "ryan@nickname"`
+    # the config's 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:
+    #   https://www.ssh.com/academy/ssh/config
+    extraConfig = ''
+      Host 192.168.*
+        # allow to securely use local SSH agent to authenticate on the remote machine.
+        # It has the same effect as adding cli option `ssh -A user@host`
+        ForwardAgent yes
+        # romantic holds my homelab~
+        IdentityFile ~/.ssh/romantic
+        # Specifies that ssh should only use the identity file explicitly configured above
+        # required to prevent sending default identity files first.
+        IdentitiesOnly yes
+
+      Host github.com
+          # github is controlled by gluttony~
+          IdentityFile ~/.ssh/gluttony
+          # Specifies that ssh should only use the identity file explicitly configured above
+          # required to prevent sending default identity files first.
+          IdentitiesOnly yes
+
+      Host gtr5
+        HostName 192.168.5.172
+        Port 22
+      
+      Host um560
+        HostName 192.168.5.173
+        Port 22
+
+      Host s500plus
+        HostName 192.168.5.174
+        Port 22
+    '';
+
+    # use ssh-agent so we only need to input passphrase once
+    # run `ssh-add /path/to/key` for every identity file
+    # check imported keys by `ssh-add -l`
+    # TODO `ssh-add` can only add keys temporary, use gnome-keyring to unlock all keys after login.
+  };
+}

home/linux/desktop/xdg.nix

@@ -0,0 +1,90 @@
+# XDG stands for "Cross-Desktop Group", with X used to mean "cross". 
+# It's a bunch of specifications from freedesktop.org intended to standardize desktops and 
+# other GUI applications on various systems (primarily Unix-like) to be interoperable: 
+#   https://www.freedesktop.org/wiki/Specifications/
+{ config, pkgs, ... }:
+{
+  home.packages = with pkgs; [
+    xdg-utils # provides cli tools such as `xdg-mime` `xdg-open`
+    xdg-user-dirs
+  ];
+
+  xdg = {
+    enable = true;
+    cacheHome = config.home.homeDirectory + "/.local/cache";
+
+    # manage $XDG_CONFIG_HOME/mimeapps.list
+    # xdg search all desktop entries from $XDG_DATA_DIRS, check it by command:
+    #  echo $XDG_DATA_DIRS 
+    # the system-level desktop entries can be list by command:
+    #   ls -l /run/current-system/sw/share/applications/
+    # the user-level desktop entries can be list by command(user ryan):
+    #  ls /etc/profiles/per-user/ryan/share/applications/
+    mimeApps = {
+      enable = true;
+      defaultApplications =
+        let
+          browser = [ "firefox.desktop" ];
+        in
+        {
+          "application/json" = browser;
+          "application/pdf" = browser; # TODO: pdf viewer
+
+          "text/html" = browser;
+          "text/xml" = browser;
+          "application/xml" = browser;
+          "application/xhtml+xml" = browser;
+          "application/xhtml_xml" = browser;
+          "application/rdf+xml" = browser;
+          "application/rss+xml" = browser;
+          "application/x-extension-htm" = browser;
+          "application/x-extension-html" = browser;
+          "application/x-extension-shtml" = browser;
+          "application/x-extension-xht" = browser;
+          "application/x-extension-xhtml" = browser;
+
+          "x-scheme-handler/about" = browser;
+          "x-scheme-handler/ftp" = browser;
+          "x-scheme-handler/http" = browser;
+          "x-scheme-handler/https" = browser;
+          "x-scheme-handler/unknown" = browser;
+
+          "x-scheme-handler/discord" = [ "discord.desktop" ];
+          "x-scheme-handler/tg" = [ "telegramdesktop.desktop" ];
+
+          "audio/*" = [ "mpv.desktop" ];
+          "video/*" = [ "mpv.dekstop" ];
+          "image/*" = [ "imv.desktop" ];
+        };
+
+      associations.removed =
+        let
+          browser = [ "google-chrome.desktop" ];
+        in
+        {
+          "text/html" = browser;
+          "text/xml" = browser;
+          "application/xml" = browser;
+          "application/xhtml+xml" = browser;
+          "application/xhtml_xml" = browser;
+          "application/rdf+xml" = browser;
+          "application/rss+xml" = browser;
+          "image/gif" = browser;
+          "image/jpeg" = browser;
+          "image/png" = browser;
+          "image/webp" = browser;
+          "x-scheme-handler/http" = browser;
+          "x-scheme-handler/https" = browser;
+          "application/pdf" = browser;
+        };
+    };
+
+    userDirs = {
+      enable = true;
+      createDirectories = true;
+      extraConfig = {
+        XDG_SCREENSHOTS_DIR = "${config.xdg.userDirs.pictures}/Screenshots";
+      };
+    };
+  };
+}