Change the behavior of git-commit back to what it was back in
d4bb43ee27 ("Invoke "git gc --auto" from commit, merge, am and
rebase.", 2007-09-05) when it was git-commit.sh.
Shortly afterwards in f5bbc3225c ("Port git commit to C.", 2007-11-08)
when it was ported to C, the "git gc --auto" invocation went away.
Before this, git gc --auto only ran for
git-{am,merge,fetch,receive-pack}. Therefore it was possible to write
a script that would "git commit" a lot of data locally, and gc would
never run.
One such repository that was locally committing generated zone file
changes had grown to a size of ~60GB before a daily cronjob was added
to "git gc", bringing it down to less than 1GB. This will make such
cases work without intervention.
I think fixing such pathological cases where the repository will grow
forever is a worthwhile trade-off for spending a couple of
milliseconds calling "git gc --auto" (in the common cases where it
doesn't do anything).
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
On Wed, Feb 28 2018, Junio C. Hamano jotted:
> Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> writes:
>
>> Change the behavior of git-commit back to what it was back in
>> d4bb43ee27 ("Invoke "git gc --auto" from commit, merge, am and
>> rebase.", 2007-09-05) when it was git-commit.sh.
>
> ... which was to run it just before post-commit. Do I retitle this
> patch before queuing?
Do'h. Of course I screw up something simple like that, sorry. This v2
fixes it, and I also rephrased the commit message a bit (more commas &
full-stops).
> So this is a decade late regression fix? As they say, better late
> than never, probably.
Yup.
I wonder if it would also be a good idea to run git gc --auto on "git
push". It itself won't create any objects, but it would be a nice
proxy in many cases for picking up anything else we missed due to
various object writing commands that won't run --auto.
builtin/commit.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/builtin/commit.c b/builtin/commit.c
index e8e8d13be4..a16a056f6a 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1402,6 +1402,7 @@ int run_commit_hook(int editor_is_used, const char *index_file, const char *name
int cmd_commit(int argc, const char **argv, const char *prefix)
{
+ const char *argv_gc_auto[] = {"gc", "--auto", NULL};
static struct wt_status s;
static struct option builtin_commit_options[] = {
OPT__QUIET(&quiet, N_("suppress summary after successful commit")),
@@ -1607,6 +1608,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
"not exceeded, and then \"git reset HEAD\" to recover."));
rerere(0);
+ run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
run_commit_hook(use_editor, get_index_file(), "post-commit", NULL);
if (amend && !no_post_rewrite) {
commit_post_rewrite(current_head, &oid);
--
2.15.1.424.g9478a66081
