Add format argument to git revdate ffi (#179)

dmsrc/git.dm

@@ -2,7 +2,8 @@
 #define rustg_git_revparse(rev) RUSTG_CALL(RUST_G, "rg_git_revparse")(rev)
 
 /**
- * Returns the date of the given revision in the format YYYY-MM-DD.
- * Returns null if the revision is invalid.
+ * Returns the date of the given revision using the provided format.
+ * Defaults to returning %F which is YYYY-MM-DD.
  */
-#define rustg_git_commit_date(rev) RUSTG_CALL(RUST_G, "rg_git_commit_date")(rev)
+/proc/rustg_git_commit_date(rev, format = "%F")
+	return RUSTG_CALL(RUST_G, "rg_git_commit_date")(rev, format)

src/git.rs

@@ -13,14 +13,14 @@ byond_fn!(fn rg_git_revparse(rev) {
     })
 });
 
-byond_fn!(fn rg_git_commit_date(rev) {
+byond_fn!(fn rg_git_commit_date(rev, format) {
     REPOSITORY.with(|repo| -> Option<String> {
         let repo = repo.as_ref().ok()?;
         let rev = repo.rev_parse_single(rev).ok()?;
         let object = rev.object().ok()?;
         let commit = object.try_into_commit().ok()?;
         let commit_time = commit.committer().ok()?.time;
         let datetime = Utc.timestamp_opt(commit_time.seconds, 0).latest()?;
-        Some(datetime.format("%F").to_string())
+        Some(datetime.format(format).to_string())
     })
 });