4 files changed, 103 insertions, 0 deletions
diff --git a/mingling_core/src/builds/comp.rs b/mingling_core/src/builds/comp.rs
index 228ef81..ad70cd2 100644
--- a/mingling_core/src/builds/comp.rs
+++ b/mingling_core/src/builds/comp.rs
@@ -1,3 +1,5 @@
+use std::path::PathBuf;
+
 use just_template::tmpl_param;
 
 use crate::ShellFlag;
@@ -84,6 +86,27 @@ pub fn build_comp_script_to(
     std::fs::write(&output_path, tmpl.to_string())
 }
 
+/// Generate a shell completion script and write it to a specified file path.
+///
+/// This function takes a shell flag, a binary name, and an output file path,
+/// selects the appropriate template, substitutes the binary name into the template,
+/// and writes the resulting completion script directly to the specified file path.
+///
+/// # Example
+/// ```
+/// build_comp_script_to_file(&ShellFlag::Bash, "myapp", "target/completions/myapp_comp.sh").unwrap();
+/// ```
+pub fn build_comp_script_to_file(
+    shell_flag: &ShellFlag,
+    bin_name: &str,
+    output_path: impl Into<PathBuf>,
+) -> 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);
+    std::fs::write(output_path.into(), tmpl.to_string())
+}
+
 fn get_tmpl(shell_flag: &ShellFlag) -> (&'static str, &'static str) {
     match shell_flag {
         ShellFlag::Bash => (TMPL_COMP_BASH, ".sh"),
diff --git a/mingling_core/src/comp.rs b/mingling_core/src/comp.rs
index 4fb17c7..fd26e1b 100644
--- a/mingling_core/src/comp.rs
+++ b/mingling_core/src/comp.rs
@@ -2,11 +2,17 @@ mod flags;
 mod shell_ctx;
 mod suggest;
 
+#[cfg(feature = "builds")]
+mod installation;
+
 use std::collections::BTreeSet;
 use std::fmt::Display;
 
 #[doc(hidden)]
 pub use flags::*;
+#[cfg(feature = "builds")]
+#[doc(hidden)]
+pub use installation::*;
 #[doc(hidden)]
 pub use shell_ctx::*;
 #[doc(hidden)]
diff --git a/mingling_core/src/comp/installation.rs b/mingling_core/src/comp/installation.rs
new file mode 100644
index 0000000..d3d31d6
--- /dev/null
+++ b/mingling_core/src/comp/installation.rs
@@ -0,0 +1,72 @@
+use crate::{build::build_comp_script_to_file, ShellFlag};
+
+pub fn install_comp_script(
+    flag: ShellFlag,
+    bin_name: impl AsRef<str>,
+) -> Result<(), std::io::Error> {
+    match flag {
+        // ~/.local/share/bash-completion/completions/
+        ShellFlag::Bash => {
+            let Some(data_dir) = dirs::data_dir() else {
+                return Err(std::io::Error::new(
+                    std::io::ErrorKind::Unsupported,
+                    "Data directory not found!",
+                ));
+            };
+
+            let bin_name = bin_name.as_ref();
+
+            let comp_script_path = data_dir
+                .join("bash-completion")
+                .join("completions")
+                .join(format!("{}.sh", bin_name));
+
+            build_comp_script_to_file(&ShellFlag::Bash, bin_name, comp_script_path)?;
+            Ok(())
+        }
+
+        // ~/.zsh/completions/
+        ShellFlag::Zsh => {
+            let Some(home_dir) = dirs::home_dir() else {
+                return Err(std::io::Error::new(
+                    std::io::ErrorKind::Unsupported,
+                    "Home directory not found!",
+                ));
+            };
+
+            let bin_name = bin_name.as_ref();
+
+            let comp_script_path = home_dir
+                .join(".zsh")
+                .join("completions")
+                .join(format!("{}.zsh", bin_name));
+
+            build_comp_script_to_file(&ShellFlag::Zsh, bin_name, comp_script_path)?;
+            Ok(())
+        }
+
+        // ~/.config/fish/completions/
+        ShellFlag::Fish => {
+            let Some(config_dir) = dirs::config_dir() else {
+                return Err(std::io::Error::new(
+                    std::io::ErrorKind::Unsupported,
+                    "Config directory not found!",
+                ));
+            };
+
+            let bin_name = bin_name.as_ref();
+
+            let comp_script_path = config_dir
+                .join("fish")
+                .join("completions")
+                .join(format!("{}.fish", bin_name));
+
+            build_comp_script_to_file(&ShellFlag::Fish, bin_name, comp_script_path)?;
+            Ok(())
+        }
+        _ => Err(std::io::Error::new(
+            std::io::ErrorKind::Unsupported,
+            "unsupported shell flag",
+        )),
+    }
+}
diff --git a/mingling_core/src/lib.rs b/mingling_core/src/lib.rs
index 83edda8..e1c188f 100644
--- a/mingling_core/src/lib.rs
+++ b/mingling_core/src/lib.rs
@@ -51,10 +51,12 @@ pub mod setup {
     pub use crate::program::setup::*;
 }
 
+#[cfg(feature = "builds")]
 #[doc(hidden)]
 pub mod builds;
 
 /// Provides build scripts for users
+#[cfg(feature = "builds")]
 pub mod build {
     #[cfg(feature = "comp")]
     pub use crate::builds::comp::*;