From 110c4dd51567674522a3e1d7d968bdc4de030b10 Mon Sep 17 00:00:00 2001
From: Daniel Scherzer <daniel.e.scherzer@gmail.com>
Date: Sat, 7 Mar 2026 08:31:50 -0800
Subject: [PATCH] mailmap_from_repo(): make `.mailmap` file optional

If not present, treat the same as an empty file
---
 src/main.rs | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 95ea0cac..1dffc349 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -438,13 +438,16 @@ fn build_author_map_(
 }
 
 fn mailmap_from_repo(repo: &git2::Repository) -> Result<Mailmap, Box<dyn std::error::Error>> {
+    let tree = repo.revparse_single("HEAD")?
+        .peel_to_commit()?
+        .tree()?;
+    let file = tree.get_name(".mailmap");
+    let file = match file {
+        None => return Mailmap::from_string("".to_string()),
+        Some(f) => f
+    };
     let file = String::from_utf8(
-        repo.revparse_single("HEAD")?
-            .peel_to_commit()?
-            .tree()?
-            .get_name(".mailmap")
-            .unwrap()
-            .to_object(&repo)?
+        file.to_object(&repo)?
             .peel_to_blob()?
             .content()
             .into(),