include commit-hash in version (#185)

build.rs

@@ -1,4 +1,18 @@
+use std::process::Command;
+
 fn main() {
+    // commit hash
+    let git_describe = Command::new("git")
+        .arg("describe")
+        .arg("--always")
+        .arg("--dirty")
+        .arg("--tags")
+        .output()
+        .unwrap();
+
+    let git_describe = String::from_utf8(git_describe.stdout).unwrap();
+    println!("cargo::rustc-env=GIT_DESCRIBE={git_describe}");
+
     // composite_templates
     #[cfg(feature = "gtk")]
     glib_build_tools::compile_resources(

flake.nix

@@ -53,7 +53,7 @@
           libadwaita
           librsvg
           xorg.libXtst
-        ] ++ lib.optionals stdenv.isDarwin 
+        ] ++ lib.optionals stdenv.isDarwin
         (with darwin.apple_sdk_11_0.frameworks; [
           CoreGraphics
           ApplicationServices

nix/default.nix

@@ -12,6 +12,7 @@ rustPlatform.buildRustPackage {
   version = version;
 
   nativeBuildInputs = with pkgs; [
+    git
     pkg-config
     cmake
     makeWrapper

src/config.rs

@@ -50,7 +50,7 @@ impl ConfigToml {
 }
 
 #[derive(Parser, Debug)]
-#[command(author, version, about, long_about = None)]
+#[command(author, version=env!("GIT_DESCRIBE"), about, long_about = None)]
 struct CliArgs {
     /// the listen port for lan-mouse
     #[arg(short, long)]