ci(goreleaser): automate releases on tag push

This commit adapts a basic GoReleaser configuration to work for Rust
projects, allowing us to automatically create releases on GitHub via
GitHub Actions whenever a semantic version tag (vX.Y.Z) is pushed, with
custom changelogs generated by kokai, and zipped binaries attached to
the release.

Those zipped binaries are then used to create a Scoop release in a
custom bucket.

Due to the way that Scoop uses shims, when running the 'komorebic start'
command, there needs to be an explicit check to try and determine if
komorebi has been installed via Scoop. This is done by checking for a
komorebi.ps1 shim in the Path.

Scoop shims cannot be used with the Start-Process PS command, so
instead, we replicate in code what the komorebi.ps1 script is doing
(finding the path to the current version of the executable), and then
passing the entire path to the Start-Process command that gets called to
start komorebi.

The README has been updated to reflect the availability of prebuilt
binaries and how to get started with them.

komorebic/src/main.rs

@@ -3,6 +3,8 @@ use std::io::BufRead;
 use std::io::BufReader;
 use std::io::ErrorKind;
 use std::io::Write;
+use std::path::PathBuf;
+use std::process::Command;
 
 use clap::AppSettings;
 use clap::ArgEnum;
@@ -85,7 +87,7 @@ gen_target_subcommand_args! {
     FocusWorkspace
 }
 
-// Thanks to @danielhenrymantilla for showing me how to use cfr_attr with an optional argument like
+// Thanks to @danielhenrymantilla for showing me how to use cfg_attr with an optional argument like
 // this on the Rust Programming Language Community Discord Server
 macro_rules! gen_workspace_subcommand_args {
     // Workspace Property: #[enum] Value Enum (if the value is an Enum)
@@ -341,12 +343,40 @@ fn main() -> Result<()> {
             )?;
         }
         SubCommand::Start => {
-            match powershell_script::run("Start-Process komorebi -WindowStyle hidden", true) {
+            let mut buf: PathBuf;
+
+            // The komorebi.ps1 shim will only exist in the Path if installed by Scoop
+            let exec = if let Ok(output) = Command::new("where.exe").arg("komorebi.ps1").output() {
+                let stdout = String::from_utf8(output.stdout)?;
+                match stdout.trim() {
+                    stdout if stdout.is_empty() => None,
+                    stdout => {
+                        buf = PathBuf::from(stdout);
+                        buf.pop(); // %USERPROFILE%\scoop\shims
+                        buf.pop(); // %USERPROFILE%\scoop
+                        buf.push("apps\\komorebi\\current\\komorebi.exe"); //%USERPROFILE%\scoop\komorebi\current\komorebi.exe
+                        Option::from(
+                            buf.to_str()
+                                .context("cannot create a string from the scoop komorebi path")?,
+                        )
+                    }
+                }
+            } else {
+                None
+            };
+
+            let script = if let Some(exec) = exec {
+                format!("Start-Process '{}' -WindowStyle hidden", exec)
+            } else {
+                String::from("Start-Process komorebi -WindowStyle hidden")
+            };
+
+            match powershell_script::run(&script, true) {
                 Ok(output) => {
                     println!("{}", output);
                 }
-                Err(e) => {
-                    println!("Error: {}", e);
+                Err(error) => {
+                    println!("Error: {}", error);
                 }
             }
         }