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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
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')
-rw-r--r--builtin/add.c2
-rw-r--r--builtin/am.c6
-rw-r--r--builtin/checkout-index.c2
-rw-r--r--builtin/checkout.c4
-rw-r--r--builtin/clone.c2
-rw-r--r--builtin/commit.c8
-rw-r--r--builtin/merge.c6
-rw-r--r--builtin/mv.c2
-rw-r--r--builtin/read-tree.c2
-rw-r--r--builtin/reset.c2
-rw-r--r--builtin/rm.c2
-rw-r--r--builtin/update-index.c1
12 files changed, 20 insertions, 19 deletions
diff --git a/builtin/add.c b/builtin/add.c
index e8fb80b..9f53f02 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -361,7 +361,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
add_new_files = !take_worktree_changes && !refresh_only;
require_pathspec = !(take_worktree_changes || (0 < addremove_explicit));
- hold_locked_index(&lock_file, 1);
+ hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
(show_only ? ADD_CACHE_PRETEND : 0) |
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;
diff --git a/builtin/checkout-index.c b/builtin/checkout-index.c
index 30a49d9..07631d0 100644
--- a/builtin/checkout-index.c
+++ b/builtin/checkout-index.c
@@ -205,7 +205,7 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
if (index_opt && !state.base_dir_len && !to_tempfile) {
state.refresh_cache = 1;
state.istate = &the_index;
- newfd = hold_locked_index(&lock_file, 1);
+ newfd = hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
}
/* Check out named files first */
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 512492a..bfe685c 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -274,7 +274,7 @@ static int checkout_paths(const struct checkout_opts *opts,
lock_file = xcalloc(1, sizeof(struct lock_file));
- hold_locked_index(lock_file, 1);
+ hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
if (read_cache_preload(&opts->pathspec) < 0)
return error(_("index file corrupt"));
@@ -467,7 +467,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
int ret;
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);
if (read_cache_preload(NULL) < 0)
return error(_("index file corrupt"));
diff --git a/builtin/clone.c b/builtin/clone.c
index 6c76a6e..892bdbf 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -711,7 +711,7 @@ static int checkout(int submodule_progress)
setup_work_tree();
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.update = 1;
diff --git a/builtin/commit.c b/builtin/commit.c
index 8976c3d..b910e76 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -351,7 +351,7 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
if (interactive) {
char *old_index_env = NULL;
- hold_locked_index(&index_lock, 1);
+ hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
refresh_cache_or_die(refresh_flags);
@@ -396,7 +396,7 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
* (B) on failure, rollback the real index.
*/
if (all || (also && pathspec.nr)) {
- hold_locked_index(&index_lock, 1);
+ hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
add_files_to_cache(also ? prefix : NULL, &pathspec, 0);
refresh_cache_or_die(refresh_flags);
update_main_cache_tree(WRITE_TREE_SILENT);
@@ -416,7 +416,7 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
* We still need to refresh the index here.
*/
if (!only && !pathspec.nr) {
- hold_locked_index(&index_lock, 1);
+ hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
refresh_cache_or_die(refresh_flags);
if (active_cache_changed
|| !cache_tree_fully_valid(active_cache_tree))
@@ -468,7 +468,7 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
if (read_cache() < 0)
die(_("cannot read the index"));
- hold_locked_index(&index_lock, 1);
+ hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
add_remove_files(&partial);
refresh_cache(REFRESH_QUIET);
update_main_cache_tree(WRITE_TREE_SILENT);
diff --git a/builtin/merge.c b/builtin/merge.c
index b65eeaa..0070bf2 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -634,7 +634,7 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
{
static struct lock_file lock;
- hold_locked_index(&lock, 1);
+ hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
refresh_cache(REFRESH_QUIET);
if (active_cache_changed &&
write_locked_index(&the_index, &lock, COMMIT_LOCK))
@@ -671,7 +671,7 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
for (j = common; j; j = j->next)
commit_list_insert(j->item, &reversed);
- hold_locked_index(&lock, 1);
+ hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
clean = merge_recursive(&o, head,
remoteheads->item, reversed, &result);
if (clean < 0)
@@ -781,7 +781,7 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
struct commit_list *parents, **pptr = &parents;
static struct lock_file lock;
- hold_locked_index(&lock, 1);
+ hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
refresh_cache(REFRESH_QUIET);
if (active_cache_changed &&
write_locked_index(&the_index, &lock, COMMIT_LOCK))
diff --git a/builtin/mv.c b/builtin/mv.c
index 2f43877..43adf92 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -126,7 +126,7 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
if (--argc < 1)
usage_with_options(builtin_mv_usage, builtin_mv_options);
- hold_locked_index(&lock_file, 1);
+ hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
if (read_cache() < 0)
die(_("index file corrupt"));
diff --git a/builtin/read-tree.c b/builtin/read-tree.c
index 9bd1fd7..fa6edb3 100644
--- a/builtin/read-tree.c
+++ b/builtin/read-tree.c
@@ -150,7 +150,7 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
argc = parse_options(argc, argv, unused_prefix, read_tree_options,
read_tree_usage, 0);
- hold_locked_index(&lock_file, 1);
+ hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
prefix_set = opts.prefix ? 1 : 0;
if (1 < opts.merge + opts.reset + prefix_set)
diff --git a/builtin/reset.c b/builtin/reset.c
index c04ac07..8ab915b 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -354,7 +354,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
if (reset_type != SOFT) {
struct lock_file *lock = xcalloc(1, sizeof(*lock));
- hold_locked_index(lock, 1);
+ hold_locked_index(lock, LOCK_DIE_ON_ERROR);
if (reset_type == MIXED) {
int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN;
if (read_from_tree(&pathspec, &oid, intent_to_add))
diff --git a/builtin/rm.c b/builtin/rm.c
index 3f3e24e..7f15a3d 100644
--- a/builtin/rm.c
+++ b/builtin/rm.c
@@ -292,7 +292,7 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
if (!index_only)
setup_work_tree();
- hold_locked_index(&lock_file, 1);
+ hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
if (read_cache() < 0)
die(_("index file corrupt"));
diff --git a/builtin/update-index.c b/builtin/update-index.c
index f3f07e7..d530e89 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -1012,6 +1012,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
/* We can't free this memory, it becomes part of a linked list parsed atexit() */
lock_file = xcalloc(1, sizeof(struct lock_file));
+ /* we will diagnose later if it turns out that we need to update it */
newfd = hold_locked_index(lock_file, 0);
if (newfd < 0)
lock_error = errno;