1 files changed, 80 insertions, 0 deletions
diff --git a/mingling_core/src/builds/comp.rs b/mingling_core/src/builds/comp.rs
new file mode 100644
index 0000000..694af0c
--- /dev/null
+++ b/mingling_core/src/builds/comp.rs
@@ -0,0 +1,80 @@
+use just_template::tmpl_param;
+
+use crate::ShellFlag;
+
+const TMPL_COMP_BASH: &str = include_str!("../../tmpls/comps/bash.sh");
+const TMPL_COMP_ZSH: &str = include_str!("../../tmpls/comps/zsh.zsh");
+const TMPL_COMP_FISH: &str = include_str!("../../tmpls/comps/fish.fish");
+const TMPL_COMP_PWSL: &str = include_str!("../../tmpls/comps/pwsl.ps1");
+
+/// Generate shell completion scripts for the current binary.
+/// On Windows, generates PowerShell completion.
+/// On Linux, generates Zsh, Bash, and Fish completions.
+/// Scripts are written to the `OUT_DIR` (or `target/` if `OUT_DIR` is not set).
+///
+/// # Example
+/// ```
+/// // Typically called from a build script (`build.rs`):
+/// build_comp_scripts().unwrap();
+/// // Or, to specify a custom binary name:
+/// build_comp_scripts_with_bin_name("myapp").unwrap();
+/// ```
+pub fn build_comp_scripts() -> Result<(), std::io::Error> {
+    let bin_name = env!("CARGO_PKG_NAME");
+    build_comp_scripts_with_bin_name(bin_name)
+}
+
+/// Generate shell completion scripts for a given binary name.
+/// On Windows, generates PowerShell completion.
+/// On Linux, generates Zsh, Bash, and Fish completions.
+/// Scripts are written to the `OUT_DIR` (or `target/` if `OUT_DIR` is not set).
+///
+/// # Example
+/// ```
+/// // Generate completion scripts for "myapp"
+/// build_comp_scripts_with_bin_name("myapp").unwrap();
+/// ```
+pub fn build_comp_scripts_with_bin_name(name: &str) -> Result<(), std::io::Error> {
+    #[cfg(target_os = "windows")]
+    {
+        build_comp_script(&ShellFlag::Powershell, name)?;
+        Ok(())
+    }
+
+    #[cfg(target_os = "linux")]
+    {
+        build_comp_script(&ShellFlag::Zsh, name)?;
+        build_comp_script(&ShellFlag::Bash, name)?;
+        build_comp_script(&ShellFlag::Fish, name)?;
+        Ok(())
+    }
+
+    #[cfg(target_os = "macos")]
+    {
+        build_comp_script(&ShellFlag::Zsh, name)?;
+        build_comp_script(&ShellFlag::Bash, name)?;
+        build_comp_script(&ShellFlag::Fish, name)?;
+        Ok(())
+    }
+}
+
+fn build_comp_script(shell_flag: &ShellFlag, bin_name: &str) -> Result<(), std::io::Error> {
+    let (tmpl_str, ext) = get_tmpl(shell_flag);
+    let mut tmpl = just_template::Template::from(tmpl_str);
+    tmpl_param!(tmpl, bin_name = bin_name);
+    let out_dir = std::path::PathBuf::from(std::env::var("OUT_DIR").unwrap());
+    let target_dir = out_dir.join("../../../").to_path_buf();
+    let output_path = target_dir.join(format!("{}_comp{}", bin_name, ext));
+    std::fs::create_dir_all(&target_dir)?;
+    std::fs::write(&output_path, tmpl.to_string())
+}
+
+fn get_tmpl(shell_flag: &ShellFlag) -> (&'static str, &'static str) {
+    match shell_flag {
+        ShellFlag::Bash => (TMPL_COMP_BASH, ".sh"),
+        ShellFlag::Zsh => (TMPL_COMP_ZSH, ".zsh"),
+        ShellFlag::Fish => (TMPL_COMP_FISH, ".fish"),
+        ShellFlag::Powershell => (TMPL_COMP_PWSL, ".ps1"),
+        ShellFlag::Other(_) => (TMPL_COMP_BASH, ".sh"),
+    }
+}