feat: display git sha and is dirty in oma --version

Author: eatradish

Cargo.lock

@@ -75,6 +75,10 @@ rust-embed = "8.5.0"
 unic-langid = "0.9.5"
 sys-locale = "0.3"
 
+[build-dependencies]
+vergen-git2 = { version = "1.0.7", features = ["cargo"] }
+vergen = "9.0.1"
+
 [features]
 aosc = ["dep:oma-topics", "oma-refresh/aosc", "oma-pm/aosc", "oma-contents/aosc", "dep:oma-mirror", "reqwest/blocking", "dep:oma-tum"]
 mirror = []

Cargo.toml

@@ -0,0 +1,21 @@
+use std::error::Error;
+
+use vergen::{CargoBuilder, Emitter};
+use vergen_git2::Git2Builder;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let git = Git2Builder::default()
+        .sha(true)
+        .dirty(true)
+        .describe(true, false, None)
+        .build()?;
+
+    let cargo = CargoBuilder::default().features(true).debug(true).build()?;
+
+    Emitter::default()
+        .add_instructions(&git)?
+        .add_instructions(&cargo)?
+        .emit()?;
+
+    Ok(())
+}

build.rs

@@ -74,6 +74,7 @@ pub fn dangerous_color(msg: impl Display) -> String {
 #[derive(Parser, Debug)]
 #[command(
     version,
+    long_version = long_version(),
     about = fl!("clap-about"),
     long_about = None,
     disable_version_flag = true,
@@ -234,6 +235,40 @@ pub enum SubCmd {
     Why(Why),
 }
 
+fn long_version() -> String {
+    let mut ver = String::from(crate_version!());
+
+    if env!("VERGEN_GIT_DESCRIBE").is_empty() && env!("VERGEN_GIT_SHA").is_empty() {
+        ver.push_str("-unknown");
+    }
+
+    if env!("VERGEN_GIT_DESCRIBE")
+        .strip_prefix('v')
+        .is_none_or(|describe_suffix| describe_suffix != ver)
+    {
+        ver.push('-');
+        if env!("VERGEN_GIT_SHA").is_empty() {
+            ver.push_str("unknown");
+        } else {
+            ver.push_str(env!("VERGEN_GIT_SHA"));
+        }
+    }
+
+    if env!("VERGEN_GIT_DIRTY") == "true" {
+        ver.push_str("-dirty");
+    }
+
+    if env!("VERGEN_CARGO_DEBUG") == "true" {
+        ver.push_str("-debug");
+    }
+
+    let features = env!("VERGEN_CARGO_FEATURES");
+    ver.push_str(" with features: ");
+    ver.push_str(features);
+
+    ver
+}
+
 #[derive(Debug, Args)]
 pub struct Version;