Added Git Commit Hash to Version Command (#340)

* Added git commit hash to version command

* Fixed clippy warning

---------

Co-authored-by: Boppy <no-reply@boppygames.gg>
Co-authored-by: Tyler Cloutier <cloutiertyler@aol.com>

crates/cli/build.rs

@@ -0,0 +1,8 @@
+use std::process::Command;
+
+// https://stackoverflow.com/questions/43753491/include-git-commit-hash-as-string-into-rust-program
+fn main() {
+    let output = Command::new("git").args(["rev-parse", "HEAD"]).output().unwrap();
+    let git_hash = String::from_utf8(output.stdout).unwrap();
+    println!("cargo:rustc-env=GIT_HASH={}", git_hash);
+}

crates/cli/src/subcommands/version.rs

@@ -24,6 +24,7 @@ pub async fn exec(_config: Config, args: &ArgMatches) -> Result<(), anyhow::Erro
     }
 
     println!("Path: {}", std::env::current_exe()?.display());
+    println!("Commit: {}", env!("GIT_HASH"));
     println!(
         "spacetimedb tool version {}; spacetimedb-lib version {};",
         CLI_VERSION,