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-rw-r--r--builtin/add.c7
-rw-r--r--builtin/commit.c10
-rw-r--r--builtin/merge.c15
-rw-r--r--builtin/mv.c4
-rw-r--r--builtin/rm.c7
-rw-r--r--cache.h4
-rw-r--r--merge-recursive.c5
-rw-r--r--read-cache.c6
-rw-r--r--rerere.c8
-rw-r--r--sequencer.c11
10 files changed, 37 insertions, 40 deletions
diff --git a/builtin/add.c b/builtin/add.c
index ac7c1c3..9ef7fb0 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -534,10 +534,9 @@ int cmd_add(int argc, const char **argv, const char *prefix)
unplug_bulk_checkin();
finish:
- if (active_cache_changed) {
- if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
- die(_("Unable to write new index file"));
- }
+ if (write_locked_index(&the_index, &lock_file,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
+ die(_("Unable to write new index file"));
UNLEAK(pathspec);
UNLEAK(dir);
diff --git a/builtin/commit.c b/builtin/commit.c
index 092077c..37fcb55 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -389,13 +389,9 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
if (active_cache_changed
|| !cache_tree_fully_valid(active_cache_tree))
update_main_cache_tree(WRITE_TREE_SILENT);
- if (active_cache_changed) {
- if (write_locked_index(&the_index, &index_lock,
- COMMIT_LOCK))
- die(_("unable to write new_index file"));
- } else {
- rollback_lock_file(&index_lock);
- }
+ if (write_locked_index(&the_index, &index_lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
+ die(_("unable to write new_index file"));
commit_style = COMMIT_AS_IS;
ret = get_index_file();
goto out;
diff --git a/builtin/merge.c b/builtin/merge.c
index e8d9d43..ee050a4 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -652,10 +652,9 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
refresh_cache(REFRESH_QUIET);
- if (active_cache_changed &&
- write_locked_index(&the_index, &lock, COMMIT_LOCK))
+ if (write_locked_index(&the_index, &lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
return error(_("Unable to write index."));
- rollback_lock_file(&lock);
if (!strcmp(strategy, "recursive") || !strcmp(strategy, "subtree")) {
int clean, x;
@@ -692,10 +691,9 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
remoteheads->item, reversed, &result);
if (clean < 0)
exit(128);
- if (active_cache_changed &&
- write_locked_index(&the_index, &lock, COMMIT_LOCK))
+ if (write_locked_index(&the_index, &lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
die (_("unable to write %s"), get_index_file());
- rollback_lock_file(&lock);
return clean ? 0 : 1;
} else {
return try_merge_command(strategy, xopts_nr, xopts,
@@ -811,10 +809,9 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
hold_locked_index(&lock, LOCK_DIE_ON_ERROR);
refresh_cache(REFRESH_QUIET);
- if (active_cache_changed &&
- write_locked_index(&the_index, &lock, COMMIT_LOCK))
+ if (write_locked_index(&the_index, &lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
return error(_("Unable to write index."));
- rollback_lock_file(&lock);
write_tree_trivial(&result_tree);
printf(_("Wonderful.\n"));
diff --git a/builtin/mv.c b/builtin/mv.c
index 8eceb31..6d141f7 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -293,8 +293,8 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
if (gitmodules_modified)
stage_updated_gitmodules(&the_index);
- if (active_cache_changed &&
- write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
+ if (write_locked_index(&the_index, &lock_file,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
die(_("Unable to write new index file"));
return 0;
diff --git a/builtin/rm.c b/builtin/rm.c
index a818efe..4447bb4 100644
--- a/builtin/rm.c
+++ b/builtin/rm.c
@@ -385,10 +385,9 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
stage_updated_gitmodules(&the_index);
}
- if (active_cache_changed) {
- if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
- die(_("Unable to write new index file"));
- }
+ if (write_locked_index(&the_index, &lock_file,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
+ die(_("Unable to write new index file"));
return 0;
}
diff --git a/cache.h b/cache.h
index d06932e..a61b2d3 100644
--- a/cache.h
+++ b/cache.h
@@ -599,6 +599,7 @@ extern int read_index_unmerged(struct index_state *);
/* For use with `write_locked_index()`. */
#define COMMIT_LOCK (1 << 0)
+#define SKIP_IF_UNCHANGED (1 << 1)
/*
* Write the index while holding an already-taken lock. Close the lock,
@@ -615,6 +616,9 @@ extern int read_index_unmerged(struct index_state *);
* With `COMMIT_LOCK`, the lock is always committed or rolled back.
* Without it, the lock is closed, but neither committed nor rolled
* back.
+ *
+ * If `SKIP_IF_UNCHANGED` is given and the index is unchanged, nothing
+ * is written (and the lock is rolled back if `COMMIT_LOCK` is given).
*/
extern int write_locked_index(struct index_state *, struct lock_file *lock, unsigned flags);
diff --git a/merge-recursive.c b/merge-recursive.c
index 1295779..2f232ad 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -2223,10 +2223,9 @@ int merge_recursive_generic(struct merge_options *o,
return clean;
}
- if (active_cache_changed &&
- write_locked_index(&the_index, &lock, COMMIT_LOCK))
+ if (write_locked_index(&the_index, &lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
return err(o, _("Unable to write index."));
- rollback_lock_file(&lock);
return clean ? 0 : 1;
}
diff --git a/read-cache.c b/read-cache.c
index 977921d..d05eb72 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -2538,6 +2538,12 @@ int write_locked_index(struct index_state *istate, struct lock_file *lock,
int new_shared_index, ret;
struct split_index *si = istate->split_index;
+ if ((flags & SKIP_IF_UNCHANGED) && !istate->cache_changed) {
+ if (flags & COMMIT_LOCK)
+ rollback_lock_file(lock);
+ return 0;
+ }
+
if (istate->fsmonitor_last_update)
fill_fsmonitor_bitmap(istate);
diff --git a/rerere.c b/rerere.c
index 79203c6..ea24d4c 100644
--- a/rerere.c
+++ b/rerere.c
@@ -719,11 +719,9 @@ static void update_paths(struct string_list *update)
item->string);
}
- if (active_cache_changed) {
- if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK))
- die("Unable to write new index file");
- } else
- rollback_lock_file(&index_lock);
+ if (write_locked_index(&the_index, &index_lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
+ die("Unable to write new index file");
}
static void remove_variant(struct rerere_id *id)
diff --git a/sequencer.c b/sequencer.c
index 091bd6b..f9d1001 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -517,15 +517,14 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
return clean;
}
- if (active_cache_changed &&
- write_locked_index(&the_index, &index_lock, COMMIT_LOCK))
+ if (write_locked_index(&the_index, &index_lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED))
/*
* TRANSLATORS: %s will be "revert", "cherry-pick" or
* "rebase -i".
*/
return error(_("%s: Unable to write new index file"),
_(action_name(opts)));
- rollback_lock_file(&index_lock);
if (!clean)
append_conflicts_hint(msgbuf);
@@ -1713,13 +1712,13 @@ static int read_and_refresh_cache(struct replay_opts *opts)
_(action_name(opts)));
}
refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL);
- if (the_index.cache_changed && index_fd >= 0) {
- if (write_locked_index(&the_index, &index_lock, COMMIT_LOCK)) {
+ if (index_fd >= 0) {
+ if (write_locked_index(&the_index, &index_lock,
+ COMMIT_LOCK | SKIP_IF_UNCHANGED)) {
return error(_("git %s: failed to refresh the index"),
_(action_name(opts)));
}
}
- rollback_lock_file(&index_lock);
return 0;
}