From 315666bfea2d2e76d63d2931304d0d123be4134c Mon Sep 17 00:00:00 2001
From: tjh <x@tjh.dev>
Date: Sat, 14 Jun 2025 20:15:40 +0100
Subject: [PATCH] fix: correctly handle repositories with only one commit

Signed-off-by: tjh <x@tjh.dev>
Change-Id: I6a6a69649d9e92d08262bf8f19babba0661e05b9
---
 src/main.rs | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 4ed0c8f..dd6efcb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,6 +3,7 @@ use gix::Commit;
 use gix::ObjectId;
 use gix::Repository;
 use gix::bstr::BStr;
+use gix::bstr::ByteSlice;
 use gix::date::Time;
 use gix::object::tree::EntryRef;
 use gix::objs::decode::Error as DecodeError;
@@ -42,6 +43,14 @@ fn main() -> anyhow::Result<()> {
         rev_walk = rev_walk.with_boundary([stop_commit.id]);
     }
 
+    let output = |filename: &BStr, commit: &Commit| -> anyhow::Result<()> {
+        let id = commit.id;
+        let ts = format_ts(&commit.time()?, arguments.utc)?;
+        let message = commit.message()?.summary();
+        println!("{filename:<name_pad$}\t{id}\t{ts}\t{message}",);
+        Ok(())
+    };
+
     for revision in rev_walk.all()? {
         if interested.is_empty() {
             break;
@@ -49,6 +58,11 @@ fn main() -> anyhow::Result<()> {
 
         let revision = revision?;
         let Some(&parent_id) = revision.parent_ids.first() else {
+            // The revision has no parents. Assume any remaining entries belong
+            // to this commit.
+            for entry in interested.drain() {
+                output(entry.as_bstr(), &current_commit)?;
+            }
             break;
         };
 
@@ -62,13 +76,7 @@ fn main() -> anyhow::Result<()> {
         let mut scanner = EntryScanner::new(current_tree.iter(), parent_tree.iter())?;
         while let Some(change) = scanner.next_change()? {
             if interested.remove(change.filename()) {
-                let id = revision.id;
-                println!(
-                    "{:<name_pad$}\t{id}\t{}\t{}",
-                    change.filename().to_string(),
-                    format_ts(&current_commit.time()?, arguments.utc)?,
-                    current_commit.message()?.summary(),
-                );
+                output(change.filename(), &current_commit)?;
             }
         }
 
-- 
2.51.2