From d5f5d0a9443c3892cdf9665ed8e0f9004706ed65 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 6 Jul 2010 21:53:11 -0700
Subject: [PATCH] do not write out index when status does not have to
Some codepaths, such as "git status" and "git commit --dry-run",
tried to opportunisticly refresh the index and write the result
out. But they did so without checking if there was actually any
change that needs to be written out.
Noticed by Jeff King and Daniel at Rutgers.edu
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
builtin/commit.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/builtin/commit.c b/builtin/commit.c
index 80c621dc061..da18287ca9f 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -334,9 +334,13 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
if (!pathspec || !*pathspec) {
fd = hold_locked_index(&index_lock, 1);
refresh_cache_or_die(refresh_flags);
- if (write_cache(fd, active_cache, active_nr) ||
- commit_locked_index(&index_lock))
- die("unable to write new_index file");
+ if (active_cache_changed) {
+ if (write_cache(fd, active_cache, active_nr) ||
+ commit_locked_index(&index_lock))
+ die("unable to write new_index file");
+ } else {
+ rollback_lock_file(&index_lock);
+ }
commit_style = COMMIT_AS_IS;
return get_index_file();
}
@@ -1067,9 +1071,11 @@ int cmd_status(int argc, const char **argv, const char *prefix)
fd = hold_locked_index(&index_lock, 0);
if (0 <= fd) {
- if (!write_cache(fd, active_cache, active_nr))
+ if (active_cache_changed &&
+ !write_cache(fd, active_cache, active_nr))
commit_locked_index(&index_lock);
- rollback_lock_file(&index_lock);
+ else
+ rollback_lock_file(&index_lock);
}
s.is_initial = get_sha1(s.reference, sha1) ? 1 : 0;