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Diffstat (limited to 'builtin/merge.c')
-rw-r--r--builtin/merge.c130
1 files changed, 85 insertions, 45 deletions
diff --git a/builtin/merge.c b/builtin/merge.c
index 74e53cf20a..5900b81729 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -313,8 +313,16 @@ static int save_state(struct object_id *stash)
int len;
struct child_process cp = CHILD_PROCESS_INIT;
struct strbuf buffer = STRBUF_INIT;
+ struct lock_file lock_file = LOCK_INIT;
+ int fd;
int rc = -1;
+ fd = repo_hold_locked_index(the_repository, &lock_file, 0);
+ refresh_cache(REFRESH_QUIET);
+ if (0 <= fd)
+ repo_update_index_if_able(the_repository, &lock_file);
+ rollback_lock_file(&lock_file);
+
strvec_pushl(&cp.args, "stash", "create", NULL);
cp.out = -1;
cp.git_cmd = 1;
@@ -375,24 +383,26 @@ static void reset_hard(const struct object_id *oid, int verbose)
static void restore_state(const struct object_id *head,
const struct object_id *stash)
{
- struct strbuf sb = STRBUF_INIT;
- const char *args[] = { "stash", "apply", NULL, NULL };
-
- if (is_null_oid(stash))
- return;
+ struct strvec args = STRVEC_INIT;
reset_hard(head, 1);
- args[2] = oid_to_hex(stash);
+ if (is_null_oid(stash))
+ goto refresh_cache;
+
+ strvec_pushl(&args, "stash", "apply", "--index", "--quiet", NULL);
+ strvec_push(&args, oid_to_hex(stash));
/*
* It is OK to ignore error here, for example when there was
* nothing to restore.
*/
- run_command_v_opt(args, RUN_GIT_CMD);
+ run_command_v_opt(args.v, RUN_GIT_CMD);
+ strvec_clear(&args);
- strbuf_release(&sb);
- refresh_cache(REFRESH_QUIET);
+refresh_cache:
+ if (discard_cache() < 0 || read_cache() < 0)
+ die(_("could not read index"));
}
/* This is called when no merge was necessary. */
@@ -443,6 +453,7 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
}
write_file_buf(git_path_squash_msg(the_repository), out.buf, out.len);
strbuf_release(&out);
+ release_revisions(&rev);
}
static void finish(struct commit *head_commit,
@@ -490,9 +501,10 @@ static void finish(struct commit *head_commit,
}
/* Run a post-merge hook */
- run_hook_le(NULL, "post-merge", squash ? "1" : "0", NULL);
+ run_hooks_l("post-merge", squash ? "1" : "0", NULL);
- apply_autostash(git_path_merge_autostash(the_repository));
+ if (new_head)
+ apply_autostash(git_path_merge_autostash(the_repository));
strbuf_release(&reflog_message);
}
@@ -501,7 +513,6 @@ static void merge_name(const char *remote, struct strbuf *msg)
{
struct commit *remote_head;
struct object_id branch_head;
- struct strbuf buf = STRBUF_INIT;
struct strbuf bname = STRBUF_INIT;
struct merge_remote_desc *desc;
const char *ptr;
@@ -589,7 +600,6 @@ static void merge_name(const char *remote, struct strbuf *msg)
oid_to_hex(&remote_head->object.oid), remote);
cleanup:
free(found_ref);
- strbuf_release(&buf);
strbuf_release(&bname);
}
@@ -757,8 +767,10 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
else
clean = merge_recursive(&o, head, remoteheads->item,
reversed, &result);
- if (clean < 0)
- exit(128);
+ if (clean < 0) {
+ rollback_lock_file(&lock);
+ return 2;
+ }
if (write_locked_index(&the_index, &lock,
COMMIT_LOCK | SKIP_IF_UNCHANGED))
die(_("unable to write %s"), get_index_file());
@@ -845,15 +857,20 @@ static void prepare_to_commit(struct commit_list *remoteheads)
struct strbuf msg = STRBUF_INIT;
const char *index_file = get_index_file();
- if (!no_verify && run_commit_hook(0 < option_edit, index_file, "pre-merge-commit", NULL))
- abort_commit(remoteheads, NULL);
- /*
- * Re-read the index as pre-merge-commit hook could have updated it,
- * and write it out as a tree. We must do this before we invoke
- * the editor and after we invoke run_status above.
- */
- if (hook_exists("pre-merge-commit"))
- discard_cache();
+ if (!no_verify) {
+ int invoked_hook;
+
+ if (run_commit_hook(0 < option_edit, index_file, &invoked_hook,
+ "pre-merge-commit", NULL))
+ abort_commit(remoteheads, NULL);
+ /*
+ * Re-read the index as pre-merge-commit hook could have updated it,
+ * and write it out as a tree. We must do this before we invoke
+ * the editor and after we invoke run_status above.
+ */
+ if (invoked_hook)
+ discard_cache();
+ }
read_cache_from(index_file);
strbuf_addbuf(&msg, &merge_msg);
if (squash)
@@ -875,7 +892,8 @@ static void prepare_to_commit(struct commit_list *remoteheads)
append_signoff(&msg, ignore_non_trailer(msg.buf, msg.len), 0);
write_merge_heads(remoteheads);
write_file_buf(git_path_merge_msg(the_repository), msg.buf, msg.len);
- if (run_commit_hook(0 < option_edit, get_index_file(), "prepare-commit-msg",
+ if (run_commit_hook(0 < option_edit, get_index_file(), NULL,
+ "prepare-commit-msg",
git_path_merge_msg(the_repository), "merge", NULL))
abort_commit(remoteheads, NULL);
if (0 < option_edit) {
@@ -884,7 +902,7 @@ static void prepare_to_commit(struct commit_list *remoteheads)
}
if (!no_verify && run_commit_hook(0 < option_edit, get_index_file(),
- "commit-msg",
+ NULL, "commit-msg",
git_path_merge_msg(the_repository), NULL))
abort_commit(remoteheads, NULL);
@@ -992,6 +1010,7 @@ static int evaluate_result(void)
*/
cnt += count_unmerged_entries();
+ release_revisions(&rev);
return cnt;
}
@@ -1273,7 +1292,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
struct commit_list *common = NULL;
const char *best_strategy = NULL, *wt_strategy = NULL;
- struct commit_list *remoteheads, *p;
+ struct commit_list *remoteheads = NULL, *p;
void *branch_to_free;
int orig_argc = argc;
@@ -1568,8 +1587,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (autostash)
create_autostash(the_repository,
- git_path_merge_autostash(the_repository),
- "merge");
+ git_path_merge_autostash(the_repository));
if (checkout_fast_forward(the_repository,
&head_commit->object.oid,
&commit->object.oid,
@@ -1596,6 +1614,21 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
*/
refresh_cache(REFRESH_QUIET);
if (allow_trivial && fast_forward != FF_ONLY) {
+ /*
+ * Must first ensure that index matches HEAD before
+ * attempting a trivial merge.
+ */
+ struct tree *head_tree = get_commit_tree(head_commit);
+ struct strbuf sb = STRBUF_INIT;
+
+ if (repo_index_has_changes(the_repository, head_tree,
+ &sb)) {
+ error(_("Your local changes to the following files would be overwritten by merge:\n %s"),
+ sb.buf);
+ strbuf_release(&sb);
+ return 2;
+ }
+
/* See if it is really trivial. */
git_committer_info(IDENT_STRICT);
printf(_("Trying really trivial in-index merge...\n"));
@@ -1640,8 +1673,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (autostash)
create_autostash(the_repository,
- git_path_merge_autostash(the_repository),
- "merge");
+ git_path_merge_autostash(the_repository));
/* We are going to make a new commit. */
git_committer_info(IDENT_STRICT);
@@ -1653,15 +1685,15 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* tree in the index -- this means that the index must be in
* sync with the head commit. The strategies are responsible
* to ensure this.
+ *
+ * Stash away the local changes so that we can try more than one
+ * and/or recover from merge strategies bailing while leaving the
+ * index and working tree polluted.
*/
- if (use_strategies_nr == 1 ||
- /*
- * Stash away the local changes so that we can try more than one.
- */
- save_state(&stash))
+ if (save_state(&stash))
oidclr(&stash);
- for (i = 0; !merge_was_ok && i < use_strategies_nr; i++) {
+ for (i = 0; i < use_strategies_nr; i++) {
int ret, cnt;
if (i) {
printf(_("Rewinding the tree to pristine...\n"));
@@ -1676,7 +1708,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
*/
wt_strategy = use_strategies[i]->name;
- ret = try_merge_strategy(use_strategies[i]->name,
+ ret = try_merge_strategy(wt_strategy,
common, remoteheads,
head_commit);
/*
@@ -1686,16 +1718,17 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
*/
if (ret < 2) {
if (!ret) {
- if (option_commit) {
- /* Automerge succeeded. */
- automerge_was_ok = 1;
- break;
- }
+ /*
+ * This strategy worked; no point in trying
+ * another.
+ */
merge_was_ok = 1;
+ best_strategy = wt_strategy;
+ break;
}
cnt = (use_strategies_nr > 1) ? evaluate_result() : 0;
if (best_cnt <= 0 || cnt <= best_cnt) {
- best_strategy = use_strategies[i]->name;
+ best_strategy = wt_strategy;
best_cnt = cnt;
}
}
@@ -1705,7 +1738,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* If we have a resulting tree, that means the strategy module
* auto resolved the merge cleanly.
*/
- if (automerge_was_ok) {
+ if (merge_was_ok && option_commit) {
+ automerge_was_ok = 1;
ret = finish_automerge(head_commit, head_subsumed,
common, remoteheads,
&result_tree, wt_strategy);
@@ -1750,8 +1784,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
"stopped before committing as requested\n"));
else
ret = suggest_conflicts();
+ if (autostash)
+ printf(_("When finished, apply stashed changes with `git stash pop`\n"));
done:
+ if (!automerge_was_ok) {
+ free_commit_list(common);
+ free_commit_list(remoteheads);
+ }
strbuf_release(&buf);
free(branch_to_free);
return ret;
generated by cgit v1.2.3 (git 2.46.0) at 2025-11-30 11:27:19 +0000