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maintenance: delete stale lock files, fix loose-objects task #468

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merged 2 commits into from
Nov 16, 2021
Merged

maintenance: delete stale lock files, fix loose-objects task #468

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bbceaa8
maintenance: delete stale lock files
derrickstolee Nov 16, 2021
70c619f
fixup! maintenance: care about gvfs.sharedCache config
derrickstolee Nov 16, 2021
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28 changes: 26 additions & 2 deletions builtin/gc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1274,6 +1274,8 @@ static int maintenance_run_tasks(struct maintenance_run_opts *opts)
char *lock_path = xstrfmt("%s/maintenance", r->objects->odb->path);

if (hold_lock_file_for_update(&lk, lock_path, LOCK_NO_DEREF) < 0) {
struct stat st;
struct strbuf lock_dot_lock = STRBUF_INIT;
/*
* Another maintenance command is running.
*
Expand All @@ -1284,6 +1286,25 @@ static int maintenance_run_tasks(struct maintenance_run_opts *opts)
if (!opts->auto_flag && !opts->quiet)
warning(_("lock file '%s' exists, skipping maintenance"),
lock_path);

/*
* Check timestamp on .lock file to see if we should
* delete it to recover from a fail state.
*/
strbuf_addstr(&lock_dot_lock, lock_path);
strbuf_addstr(&lock_dot_lock, ".lock");
if (lstat(lock_dot_lock.buf, &st))
warning_errno(_("unable to stat '%s'"), lock_dot_lock.buf);
else {
if (st.st_mtime < time(NULL) - (6 * 60 * 60)) {
if (unlink(lock_dot_lock.buf))
warning_errno(_("unable to delete stale lock file"));
else
warning(_("deleted stale lock file"));
}
}

strbuf_release(&lock_dot_lock);
free(lock_path);
return 0;
}
Expand Down Expand Up @@ -1412,6 +1433,7 @@ static int maintenance_run(int argc, const char **argv, const char *prefix)
{
int i;
struct maintenance_run_opts opts;
const char *tmp_obj_dir = NULL;
struct option builtin_maintenance_run_options[] = {
OPT_BOOL(0, "auto", &opts.auto_flag,
N_("run tasks based on the state of the repository")),
Expand Down Expand Up @@ -1451,9 +1473,11 @@ static int maintenance_run(int argc, const char **argv, const char *prefix)
* the gvfs.sharedcache config option to redirect the
* maintenance to that location.
*/
if (!git_config_get_value("gvfs.sharedcache", &object_dir) &&
object_dir)
if (!git_config_get_value("gvfs.sharedcache", &tmp_obj_dir) &&
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yeah, i the the problem here is that git_config_get_value is returning a pointer inside of the buffer used to parse/load the config data (such that the next call to this routine might overwrite the buffer) and we're holding it too long here.

tmp_obj_dir) {
object_dir = xstrdup(tmp_obj_dir);
setenv(DB_ENVIRONMENT, object_dir, 1);
}

return maintenance_run_tasks(&opts);
}
Expand Down
17 changes: 17 additions & 0 deletions t/t7900-maintenance.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,23 @@ test_expect_success 'run [--auto|--quiet]' '
test_subcommand git gc --no-quiet <run-no-quiet.txt
'

test_expect_success 'lock file behavior' '
test_when_finished git config --unset maintenance.commit-graph.schedule &&
git config maintenance.commit-graph.schedule hourly &&

touch .git/objects/maintenance.lock &&
git maintenance run --schedule=hourly --no-quiet 2>err &&
grep "lock file .* exists, skipping maintenance" err &&

test-tool chmtime =-22000 .git/objects/maintenance.lock &&
git maintenance run --schedule=hourly --no-quiet 2>err &&
grep "deleted stale lock file" err &&
test_path_is_missing .git/objects/maintenance.lock &&

git maintenance run --schedule=hourly 2>err &&
test_must_be_empty err
'

test_expect_success 'maintenance.auto config option' '
GIT_TRACE2_EVENT="$(pwd)/default" git commit --quiet --allow-empty -m 1 &&
test_subcommand git maintenance run --auto --quiet <default &&
Expand Down