[PATCH 2/2] dim: log git --version in rerere cache commits

[Jani Nikula]

Make it easier to debug potential issues in rerere cache
handling. Adding the commit message using a temp file also makes it
easier to add more breadcrumbs in the future.
---
 dim | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/dim b/dim
index 4b65eb26f1a1..8dd2e62279cc 100755
--- a/dim
+++ b/dim
@@ -617,11 +617,21 @@ function commit_rerere_cache
 	done
 	find rr-cache/ -mtime -1 -type f -not -name "thisimage*" -print0 | xargs -0 git add > /dev/null || true
 	git rm rr-cache/rr-cache &> /dev/null || true
-	if git commit -m "$time: $integration_branch rerere cache update" >& /dev/null; then
+
+	commit_message=$(mktemp)
+	cat > $commit_message <<-EOF
+		$time: $integration_branch rerere cache update
+
+		$(git --version)
+		EOF
+
+	if git commit -F $commit_message >& /dev/null; then
 		echo -n "New commit. "
 	else
 		echo -n "Nothing changed. "
 	fi
+	rm $commit_message
+
 	echo -n "Pushing rerere cache... "
 	git push $DRY_RUN $remote HEAD >& /dev/null && echo "Done."
 }
-- 
2.11.0