From fe50c75cf627a6b0bf4706d44ef5b7ad84de7dc7 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Sat, 13 Jul 2019 10:20:36 +0200
Subject: Include git stderr in error message

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
---
 src/git.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/git.rs b/src/git.rs
index 0f59c69..35b3dbf 100644
--- a/src/git.rs
+++ b/src/git.rs
@@ -19,9 +19,12 @@ pub fn crawl_git_tree<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
         .output()?;
 
     if !output.status.success() {
+        let errstr = String::from_utf8(output.stderr)
+            .unwrap_or_else(|_| String::from("<could not format git error output as UTF8>"));
+
         return Err(io::Error::new(
             io::ErrorKind::Other,
-            "git ls-tree did not run successfully",
+            format!("git ls-tree did not run successfully: {}", errstr),
         ));
     }
 
-- 
cgit v1.2.3