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authorJunio C Hamano <gitster@pobox.com>2016-12-07 18:33:54 (GMT)
committerJunio C Hamano <gitster@pobox.com>2016-12-07 19:31:59 (GMT)
commitb3e83cc752e905e063d0930c682a06de5034074f (patch)
treef822b30cc3737c6c6cf621667d43141deecc83be /builtin/am.c
parent89d38fb26664038a85eb5a0da8fa4d23228e450d (diff)
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hold_locked_index(): align error handling with hold_lockfile_for_update()
Callers of the hold_locked_index() function pass 0 when they want to prepare to write a new version of the index file without wishing to die or emit an error message when the request fails (e.g. somebody else already held the lock), and pass 1 when they want the call to die upon failure. This option is called LOCK_DIE_ON_ERROR by the underlying lockfile API, and the hold_locked_index() function translates the paramter to LOCK_DIE_ON_ERROR when calling the hold_lock_file_for_update(). Replace these hardcoded '1' with LOCK_DIE_ON_ERROR and stop translating. Callers other than the ones that are replaced with this change pass '0' to the function; no behaviour change is intended with this patch. Signed-off-by: Junio C Hamano <gitster@pobox.com> --- Among the callers of hold_locked_index() that passes 0: - diff.c::refresh_index_quietly() at the end of "git diff" is an opportunistic update; it leaks the lockfile structure but it is just before the program exits and nobody should care. - builtin/describe.c::cmd_describe(), builtin/commit.c::cmd_status(), sequencer.c::read_and_refresh_cache() are all opportunistic updates and they are OK. - builtin/update-index.c::cmd_update_index() takes a lock upfront but we may end up not needing to update the index (i.e. the entries may be fully up-to-date), in which case we do not need to issue an error upon failure to acquire the lock. We do diagnose and die if we indeed need to update, so it is OK. - wt-status.c::require_clean_work_tree() IS BUGGY. It asks silence, does not check the returned value. Compare with callsites like cmd_describe() and cmd_status() to notice that it is wrong to call update_index_if_able() unconditionally.
Diffstat (limited to 'builtin/am.c')
-rw-r--r--builtin/am.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/builtin/am.c b/builtin/am.c
index 6981f42..bb5da42 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1119,7 +1119,7 @@ static void refresh_and_write_cache(void)
{
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
- hold_locked_index(lock_file, 1);
+ hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
refresh_cache(REFRESH_QUIET);
if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
die(_("unable to write index file"));
@@ -1976,7 +1976,7 @@ static int fast_forward_to(struct tree *head, struct tree *remote, int reset)
return -1;
lock_file = xcalloc(1, sizeof(struct lock_file));
- hold_locked_index(lock_file, 1);
+ hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
refresh_cache(REFRESH_QUIET);
@@ -2016,7 +2016,7 @@ static int merge_tree(struct tree *tree)
return -1;
lock_file = xcalloc(1, sizeof(struct lock_file));
- hold_locked_index(lock_file, 1);
+ hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
memset(&opts, 0, sizeof(opts));
opts.head_idx = 1;