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.

3 files changed, 20 insertions, 10 deletions

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 {