rename_ref: replace empty message in HEAD's log

When the current branch is renamed, the deletion of the old ref is recorded in HEAD's log with an empty message. Now that delete_ref() accepts a reflog message, provide a more descriptive message by passing along the log message that is given to rename_ref(). The next step will be to extend HEAD's log to also include the second part of the rename, the creation of the new branch. Helped-by: Jeff King <peff@peff.net> Signed-off-by: Kyle Meyer <kyle@kyleam.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Kyle Meyer committed Feb 20, 2017 at 20:10 UTC 893dbf5ba16c47c7284209bc6c527195f368ee35
2 files changed +6 -1
refs/files-backend.c
+1 -1
@@ -2616,7 +2616,7 @@ static int files_rename_ref(struct ref_store *ref_store,
2616 return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s",
2617 oldrefname, strerror(errno));
2618
2619 - if (delete_ref(NULL, oldrefname, orig_sha1, REF_NODEREF)) {
2619 + if (delete_ref(logmsg, oldrefname, orig_sha1, REF_NODEREF)) {
2620 error("unable to delete old %s", oldrefname);
2621 goto rollback;
2622 }
t/t3200-branch.sh
+5
@@ -139,6 +139,11 @@ test_expect_success 'git branch -M baz bam should succeed when baz is checked ou
139 test $(git rev-parse --abbrev-ref HEAD) = bam
140 '
141
142 +test_expect_success 'git branch -M baz bam should add entry to .git/logs/HEAD' '
143 + msg="Branch: renamed refs/heads/baz to refs/heads/bam" &&
144 + grep " 0\{40\}.*$msg$" .git/logs/HEAD
145 +'
146 +
147 test_expect_success 'git branch -M baz bam should succeed when baz is checked out as linked working tree' '
148 git checkout master &&
149 git worktree add -b baz bazdir &&