feat: add build script for version info and shell completions

Introduce a build.rs that generates a version.txt file with the
package version, git commit hash, and date. Also generate shell
completion scripts using mingling's build utilities.

Migrate the `-v/--version` flag to read from the generated
version.txt and replace BasicProgramSetup with HelpFlagSetup.

6 files changed, 93 insertions, 11 deletions

diff --git a/rola-cli/.gitignore b/rola-cli/.gitignore
new file mode 100644
index 0000000..b0b27d9
--- /dev/null
+++ b/rola-cli/.gitignore
@@ -0,0 +1,2 @@
+src/bin/debug.rs
+version.txt
diff --git a/rola-cli/Cargo.toml b/rola-cli/Cargo.toml
index a04a403..6b45c5a 100644
--- a/rola-cli/Cargo.toml
+++ b/rola-cli/Cargo.toml
@@ -23,5 +23,17 @@ rev = "002f3fd390f64b1d7632f8530a0db81d45edf6c2"
 features = [
     "parser",
     "extra_macros",
-    "dispatch_tree"
+    "dispatch_tree",
+    "comp"
 ]
+
+[build-dependencies.mingling]
+git = "https://github.com/mingling-rs/mingling.git"
+rev = "002f3fd390f64b1d7632f8530a0db81d45edf6c2"
+features = [
+    "builds",
+    "comp"
+]
+
+[build-dependencies]
+chrono = "0.4.45"
diff --git a/rola-cli/build.rs b/rola-cli/build.rs
new file mode 100644
index 0000000..a409a17
--- /dev/null
+++ b/rola-cli/build.rs
@@ -0,0 +1,58 @@
+use std::path::Path;
+use std::process::Command;
+
+use mingling::build::build_comp_scripts;
+
+fn main() {
+    build_version_info();
+    build_completion();
+}
+
+fn build_version_info() {
+    // Read version from CARGO_PKG_VERSION (inherited from workspace Cargo.toml)
+    let version = env!("CARGO_PKG_VERSION");
+
+    // Get git commit hash (first 9 characters)
+    let commit_hash = Command::new("git")
+        .args(["rev-parse", "--short=9", "HEAD"])
+        .output()
+        .ok()
+        .and_then(|output| {
+            if output.status.success() {
+                String::from_utf8(output.stdout).ok()
+            } else {
+                None
+            }
+        })
+        .map(|s| s.trim().to_string())
+        .unwrap_or_else(|| "unknown".to_string());
+
+    // Get date from git commit, fallback to current date
+    let date = Command::new("git")
+        .args(["log", "-1", "--format=%ad", "--date=format:%Y-%m-%d"])
+        .output()
+        .ok()
+        .and_then(|output| {
+            if output.status.success() {
+                String::from_utf8(output.stdout).ok()
+            } else {
+                None
+            }
+        })
+        .map(|s| s.trim().to_string())
+        .unwrap_or_else(|| chrono::Local::now().format("%Y-%m-%d").to_string());
+
+    let version_string = format!("rola {version} ({commit_hash} {date})");
+
+    let out_dir = Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap()).join("version.txt");
+
+    std::fs::write(&out_dir, version_string).expect("failed to write version.txt");
+
+    println!("cargo::rerun-if-changed=../Cargo.toml");
+    println!("cargo::rerun-if-changed=../Cargo.lock");
+    println!("cargo::rerun-if-changed=.git/HEAD");
+}
+
+fn build_completion() {
+    build_comp_scripts("rola").unwrap();
+}
diff --git a/rola-cli/src/bin/.gitignore b/rola-cli/src/bin/.gitignore
deleted file mode 100644
index 6754721..0000000
--- a/rola-cli/src/bin/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-debug.rs
diff --git a/rola-cli/src/bin/rola.rs b/rola-cli/src/bin/rola.rs
index 1ebc3ae..0cfe675 100644
--- a/rola-cli/src/bin/rola.rs
+++ b/rola-cli/src/bin/rola.rs
@@ -3,19 +3,13 @@ use std::{env::current_dir, process::exit};
 use mingling::{
     Program,
     macros::program_setup,
-    setup::{BasicProgramSetup, ExitCodeSetup, QuietFlagSetup},
+    setup::{ExitCodeSetup, HelpFlagSetup, QuietFlagSetup},
 };
 use rola_cli::{ThisProgram, locale, res::current_dir::ResCurrentDir};
 
 fn main() {
     let mut program = ThisProgram::new();
 
-    program.global_flag(["-v", "--version"], |_| {
-        let help = locale::helps::Basic::help().trim();
-        eprintln!("{}", help);
-        exit(0)
-    });
-
     // Language
     locale::set_lang(
         program
@@ -23,14 +17,20 @@ fn main() {
             .unwrap_or(locale::current_locales()),
     );
 
+    // Version
+    program.global_flag(["-v", "--version"], |_| {
+        eprintln!("{}", include_str!("../../version.txt"));
+        exit(0)
+    });
+
     // Resources
     program.with_resource(ResCurrentDir {
         cwd: current_dir().unwrap(),
     });
 
     // Setup
+    program.with_setup(HelpFlagSetup::new(["-h", "--help"]));
     program.with_setup(StandardOutputSetup);
-    program.with_setup(BasicProgramSetup);
     program.with_setup(ExitCodeSetup::default());
 
     // Execute
diff --git a/rola-cli/src/lib.rs b/rola-cli/src/lib.rs
index f81c34e..54ff09a 100644
--- a/rola-cli/src/lib.rs
+++ b/rola-cli/src/lib.rs
@@ -1,4 +1,6 @@
-use mingling::macros::gen_program;
+use std::process::exit;
+
+use mingling::macros::{gen_program, help};
 
 pub mod res;
 pub mod tokio_wrapper;
@@ -9,6 +11,15 @@ use bucket_mgr::*;
 mod error;
 use error::*;
 
+#[help]
+fn handle_error_dispatch_not_found(_err: ErrorDispatcherNotFound) {
+    let help = locale::helps::Basic::help().trim();
+
+    // Print directly to stderr and exit with code 0
+    eprintln!("{}", help);
+    exit(0)
+}
+
 gen_program!();
 
 pub mod locale {