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Diffstat (limited to 'builtin/merge.c')
-rw-r--r--builtin/merge.c152
1 files changed, 83 insertions, 69 deletions
diff --git a/builtin/merge.c b/builtin/merge.c
index 85c54dcd5a..b555a1bf9c 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -64,6 +64,7 @@ static int option_renormalize;
static int verbosity;
static int allow_rerere_auto;
static int abort_current_merge;
+static int allow_unrelated_histories;
static int show_progress = -1;
static int default_to_upstream = 1;
static const char *sign_commit;
@@ -221,6 +222,8 @@ static struct option builtin_merge_options[] = {
OPT__VERBOSITY(&verbosity),
OPT_BOOL(0, "abort", &abort_current_merge,
N_("abort the current in-progress merge")),
+ OPT_BOOL(0, "allow-unrelated-histories", &allow_unrelated_histories,
+ N_("allow merging unrelated histories")),
OPT_SET_INT(0, "progress", &show_progress, N_("force progress reporting"), 1),
{ OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
@@ -231,9 +234,9 @@ static struct option builtin_merge_options[] = {
/* Cleans up metadata that is uninteresting after a succeeded merge. */
static void drop_save(void)
{
- unlink(git_path("MERGE_HEAD"));
- unlink(git_path("MERGE_MSG"));
- unlink(git_path("MERGE_MODE"));
+ unlink(git_path_merge_head());
+ unlink(git_path_merge_msg());
+ unlink(git_path_merge_mode());
}
static int save_state(unsigned char *stash)
@@ -338,7 +341,7 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
struct pretty_print_context ctx = {0};
printf(_("Squash commit -- not updating HEAD\n"));
- filename = git_path("SQUASH_MSG");
+ filename = git_path_squash_msg();
fd = open(filename, O_WRONLY | O_CREAT, 0666);
if (fd < 0)
die_errno(_("Could not write to '%s'"), filename);
@@ -365,7 +368,7 @@ static void squash_message(struct commit *commit, struct commit_list *remotehead
while ((commit = get_revision(&rev)) != NULL) {
strbuf_addch(&out, '\n');
strbuf_addf(&out, "commit %s\n",
- sha1_to_hex(commit->object.sha1));
+ oid_to_hex(&commit->object.oid));
pretty_print_commit(&ctx, commit, &out);
}
if (write_in_full(fd, out.buf, out.len) != out.len)
@@ -380,7 +383,7 @@ static void finish(struct commit *head_commit,
const unsigned char *new_head, const char *msg)
{
struct strbuf reflog_message = STRBUF_INIT;
- const unsigned char *head = head_commit->object.sha1;
+ const unsigned char *head = head_commit->object.oid.hash;
if (!msg)
strbuf_addstr(&reflog_message, getenv("GIT_REFLOG_ACTION"));
@@ -404,6 +407,7 @@ static void finish(struct commit *head_commit,
* We ignore errors in 'gc --auto', since the
* user should see them.
*/
+ close_all_packs();
run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
}
}
@@ -497,7 +501,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
if (ref_exists(truname.buf)) {
strbuf_addf(msg,
"%s\t\tbranch '%s'%s of .\n",
- sha1_to_hex(remote_head->object.sha1),
+ sha1_to_hex(remote_head->object.oid.hash),
truname.buf + 11,
(early ? " (early part)" : ""));
strbuf_release(&truname);
@@ -511,7 +515,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
desc = merge_remote_util(remote_head);
if (desc && desc->obj && desc->obj->type == OBJ_TAG) {
strbuf_addf(msg, "%s\t\t%s '%s'\n",
- sha1_to_hex(desc->obj->sha1),
+ sha1_to_hex(desc->obj->oid.hash),
typename(desc->obj->type),
remote);
goto cleanup;
@@ -519,7 +523,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
}
strbuf_addf(msg, "%s\t\tcommit '%s'\n",
- sha1_to_hex(remote_head->object.sha1), remote);
+ sha1_to_hex(remote_head->object.oid.hash), remote);
cleanup:
strbuf_release(&buf);
strbuf_release(&bname);
@@ -754,7 +758,7 @@ static void add_strategies(const char *string, unsigned attr)
static void write_merge_msg(struct strbuf *msg)
{
- const char *filename = git_path("MERGE_MSG");
+ const char *filename = git_path_merge_msg();
int fd = open(filename, O_WRONLY | O_CREAT, 0666);
if (fd < 0)
die_errno(_("Could not open '%s' for writing"),
@@ -766,7 +770,7 @@ static void write_merge_msg(struct strbuf *msg)
static void read_merge_msg(struct strbuf *msg)
{
- const char *filename = git_path("MERGE_MSG");
+ const char *filename = git_path_merge_msg();
strbuf_reset(msg);
if (strbuf_read_file(msg, filename, 0) < 0)
die_errno(_("Could not read from '%s'"), filename);
@@ -799,14 +803,14 @@ static void prepare_to_commit(struct commit_list *remoteheads)
strbuf_commented_addf(&msg, _(merge_editor_comment), comment_line_char);
write_merge_msg(&msg);
if (run_commit_hook(0 < option_edit, get_index_file(), "prepare-commit-msg",
- git_path("MERGE_MSG"), "merge", NULL))
+ git_path_merge_msg(), "merge", NULL))
abort_commit(remoteheads, NULL);
if (0 < option_edit) {
- if (launch_editor(git_path("MERGE_MSG"), NULL, NULL))
+ if (launch_editor(git_path_merge_msg(), NULL, NULL))
abort_commit(remoteheads, NULL);
}
read_merge_msg(&msg);
- stripspace(&msg, 0 < option_edit);
+ strbuf_stripspace(&msg, 0 < option_edit);
if (!msg.len)
abort_commit(remoteheads, _("Empty commit message."));
strbuf_release(&merge_msg);
@@ -818,6 +822,14 @@ static int merge_trivial(struct commit *head, struct commit_list *remoteheads)
{
unsigned char result_tree[20], result_commit[20];
struct commit_list *parents, **pptr = &parents;
+ static struct lock_file lock;
+
+ hold_locked_index(&lock, 1);
+ refresh_cache(REFRESH_QUIET);
+ if (active_cache_changed &&
+ write_locked_index(&the_index, &lock, COMMIT_LOCK))
+ return error(_("Unable to write index."));
+ rollback_lock_file(&lock);
write_tree_trivial(result_tree);
printf(_("Wonderful.\n"));
@@ -865,7 +877,7 @@ static int suggest_conflicts(void)
FILE *fp;
struct strbuf msgbuf = STRBUF_INIT;
- filename = git_path("MERGE_MSG");
+ filename = git_path_merge_msg();
fp = fopen(filename, "a");
if (!fp)
die_errno(_("Could not open '%s' for writing"), filename);
@@ -892,7 +904,7 @@ static struct commit *is_old_style_invocation(int argc, const char **argv,
second_token = lookup_commit_reference_gently(second_sha1, 0);
if (!second_token)
die(_("'%s' is not a commit"), argv[1]);
- if (hashcmp(second_token->object.sha1, head))
+ if (hashcmp(second_token->object.oid.hash, head))
return NULL;
}
return second_token;
@@ -938,7 +950,7 @@ static int setup_with_upstream(const char ***argv)
if (!branch->merge_nr)
die(_("No default upstream defined for the current branch."));
- args = xcalloc(branch->merge_nr + 1, sizeof(char *));
+ args = xcalloc(st_add(branch->merge_nr, 1), sizeof(char *));
for (i = 0; i < branch->merge_nr; i++) {
if (!branch->merge[i]->dst)
die(_("No remote-tracking branch for %s from %s"),
@@ -958,16 +970,16 @@ static void write_merge_state(struct commit_list *remoteheads)
struct strbuf buf = STRBUF_INIT;
for (j = remoteheads; j; j = j->next) {
- unsigned const char *sha1;
+ struct object_id *oid;
struct commit *c = j->item;
if (c->util && merge_remote_util(c)->obj) {
- sha1 = merge_remote_util(c)->obj->sha1;
+ oid = &merge_remote_util(c)->obj->oid;
} else {
- sha1 = c->object.sha1;
+ oid = &c->object.oid;
}
- strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1));
+ strbuf_addf(&buf, "%s\n", oid_to_hex(oid));
}
- filename = git_path("MERGE_HEAD");
+ filename = git_path_merge_head();
fd = open(filename, O_WRONLY | O_CREAT, 0666);
if (fd < 0)
die_errno(_("Could not open '%s' for writing"), filename);
@@ -977,7 +989,7 @@ static void write_merge_state(struct commit_list *remoteheads)
strbuf_addch(&merge_msg, '\n');
write_merge_msg(&merge_msg);
- filename = git_path("MERGE_MODE");
+ filename = git_path_merge_mode();
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (fd < 0)
die_errno(_("Could not open '%s' for writing"), filename);
@@ -1019,7 +1031,7 @@ static struct commit_list *reduce_parents(struct commit *head_commit,
int *head_subsumed,
struct commit_list *remoteheads)
{
- struct commit_list *parents, *next, **remotes = &remoteheads;
+ struct commit_list *parents, **remotes;
/*
* Is the current HEAD reachable from another commit being
@@ -1033,16 +1045,14 @@ static struct commit_list *reduce_parents(struct commit *head_commit,
/* Find what parents to record by checking independent ones. */
parents = reduce_heads(remoteheads);
- for (remoteheads = NULL, remotes = &remoteheads;
- parents;
- parents = next) {
- struct commit *commit = parents->item;
- next = parents->next;
+ remoteheads = NULL;
+ remotes = &remoteheads;
+ while (parents) {
+ struct commit *commit = pop_commit(&parents);
if (commit == head_commit)
*head_subsumed = 0;
else
remotes = &commit_list_insert(commit, remotes)->next;
- free(parents);
}
return remoteheads;
}
@@ -1070,7 +1080,7 @@ static void handle_fetch_head(struct commit_list **remotes, struct strbuf *merge
if (!merge_names)
merge_names = &fetch_head_file;
- filename = git_path("FETCH_HEAD");
+ filename = git_path_fetch_head();
fd = open(filename, O_RDONLY);
if (fd < 0)
die_errno(_("could not open '%s' for reading"), filename);
@@ -1166,7 +1176,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
struct commit *head_commit;
struct strbuf buf = STRBUF_INIT;
const char *head_arg;
- int flag, i, ret = 0, head_subsumed;
+ int i, ret = 0, head_subsumed;
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;
@@ -1180,7 +1190,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* Check if we are _not_ on a detached HEAD, i.e. if there is a
* current branch.
*/
- branch = branch_to_free = resolve_refdup("HEAD", 0, head_sha1, &flag);
+ branch = branch_to_free = resolve_refdup("HEAD", 0, head_sha1, NULL);
if (branch && starts_with(branch, "refs/heads/"))
branch += 11;
if (!branch || is_null_sha1(head_sha1))
@@ -1188,6 +1198,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
else
head_commit = lookup_commit_or_die(head_sha1, "HEAD");
+ init_diff_ui_defaults();
git_config(git_merge_config, NULL);
if (branch_mergeoptions)
@@ -1204,7 +1215,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
int nargc = 2;
const char *nargv[] = {"reset", "--merge", NULL};
- if (!file_exists(git_path("MERGE_HEAD")))
+ if (!file_exists(git_path_merge_head()))
die(_("There is no merge to abort (MERGE_HEAD missing)."));
/* Invoke 'git reset --merge' */
@@ -1215,7 +1226,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (read_cache_unmerged())
die_resolve_conflict("merge");
- if (file_exists(git_path("MERGE_HEAD"))) {
+ if (file_exists(git_path_merge_head())) {
/*
* There is no unmerged entry, don't advise 'git
* add/rm <file>', just 'git commit'.
@@ -1226,7 +1237,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
else
die(_("You have not concluded your merge (MERGE_HEAD exists)."));
}
- if (file_exists(git_path("CHERRY_PICK_HEAD"))) {
+ if (file_exists(git_path_cherry_pick_head())) {
if (advice_resolve_conflict)
die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists).\n"
"Please, commit your changes before you merge."));
@@ -1258,12 +1269,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
builtin_merge_options);
if (!head_commit) {
- struct commit *remote_head;
/*
* If the merged head is a valid one there is no reason
* to forbid "git merge" into a branch yet to be born.
* We do the same for "git pull".
*/
+ unsigned char *remote_head_sha1;
if (squash)
die(_("Squash commit into empty head not supported yet"));
if (fast_forward == FF_NO)
@@ -1271,13 +1282,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
"an empty head"));
remoteheads = collect_parents(head_commit, &head_subsumed,
argc, argv, NULL);
- remote_head = remoteheads->item;
- if (!remote_head)
+ if (!remoteheads)
die(_("%s - not something we can merge"), argv[0]);
if (remoteheads->next)
die(_("Can merge only exactly one commit into empty head"));
- read_empty(remote_head->object.sha1, 0);
- update_ref("initial pull", "HEAD", remote_head->object.sha1,
+ remote_head_sha1 = remoteheads->item->object.oid.hash;
+ read_empty(remote_head_sha1, 0);
+ update_ref("initial pull", "HEAD", remote_head_sha1,
NULL, 0, UPDATE_REFS_DIE_ON_ERR);
goto done;
}
@@ -1291,7 +1302,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* additional safety measure to check for it.
*/
if (!have_message &&
- is_old_style_invocation(argc, argv, head_commit->object.sha1)) {
+ is_old_style_invocation(argc, argv, head_commit->object.oid.hash)) {
warning("old-style 'git merge <msg> HEAD <commit>' is deprecated.");
strbuf_addstr(&merge_msg, argv[0]);
head_arg = argv[1];
@@ -1319,13 +1330,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
if (verify_signatures) {
for (p = remoteheads; p; p = p->next) {
struct commit *commit = p->item;
- char hex[41];
+ char hex[GIT_SHA1_HEXSZ + 1];
struct signature_check signature_check;
memset(&signature_check, 0, sizeof(signature_check));
check_commit_signature(commit, &signature_check);
- strcpy(hex, find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV));
+ find_unique_abbrev_r(hex, commit->object.oid.hash, DEFAULT_ABBREV);
switch (signature_check.result) {
case 'G':
break;
@@ -1355,7 +1366,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
for (p = remoteheads; p; p = p->next) {
struct commit *commit = p->item;
strbuf_addf(&buf, "GITHEAD_%s",
- sha1_to_hex(commit->object.sha1));
+ sha1_to_hex(commit->object.oid.hash));
setenv(buf.buf, merge_remote_util(commit)->name, 1);
strbuf_reset(&buf);
if (fast_forward != FF_ONLY &&
@@ -1395,12 +1406,15 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
free(list);
}
- update_ref("updating ORIG_HEAD", "ORIG_HEAD", head_commit->object.sha1,
+ update_ref("updating ORIG_HEAD", "ORIG_HEAD", head_commit->object.oid.hash,
NULL, 0, UPDATE_REFS_DIE_ON_ERR);
- if (remoteheads && !common)
- ; /* No common ancestors found. We need a real merge. */
- else if (!remoteheads ||
+ if (remoteheads && !common) {
+ /* No common ancestors found. */
+ if (!allow_unrelated_histories)
+ die(_("refusing to merge unrelated histories"));
+ /* otherwise, we need a real merge. */
+ } else if (!remoteheads ||
(!remoteheads->next && !common->next &&
common->item == remoteheads->item)) {
/*
@@ -1411,19 +1425,19 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
goto done;
} else if (fast_forward != FF_NO && !remoteheads->next &&
!common->next &&
- !hashcmp(common->item->object.sha1, head_commit->object.sha1)) {
+ !hashcmp(common->item->object.oid.hash, head_commit->object.oid.hash)) {
/* Again the most common case of merging one remote. */
struct strbuf msg = STRBUF_INIT;
struct commit *commit;
- char hex[41];
- strcpy(hex, find_unique_abbrev(head_commit->object.sha1, DEFAULT_ABBREV));
-
- if (verbosity >= 0)
- printf(_("Updating %s..%s\n"),
- hex,
- find_unique_abbrev(remoteheads->item->object.sha1,
- DEFAULT_ABBREV));
+ if (verbosity >= 0) {
+ char from[GIT_SHA1_HEXSZ + 1], to[GIT_SHA1_HEXSZ + 1];
+ find_unique_abbrev_r(from, head_commit->object.oid.hash,
+ DEFAULT_ABBREV);
+ find_unique_abbrev_r(to, remoteheads->item->object.oid.hash,
+ DEFAULT_ABBREV);
+ printf(_("Updating %s..%s\n"), from, to);
+ }
strbuf_addstr(&msg, "Fast-forward");
if (have_message)
strbuf_addstr(&msg,
@@ -1434,14 +1448,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
goto done;
}
- if (checkout_fast_forward(head_commit->object.sha1,
- commit->object.sha1,
+ if (checkout_fast_forward(head_commit->object.oid.hash,
+ commit->object.oid.hash,
overwrite_ignore)) {
ret = 1;
goto done;
}
- finish(head_commit, remoteheads, commit->object.sha1, msg.buf);
+ finish(head_commit, remoteheads, commit->object.oid.hash, msg.buf);
drop_save();
goto done;
} else if (!remoteheads->next && common->next)
@@ -1460,9 +1474,9 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
/* See if it is really trivial. */
git_committer_info(IDENT_STRICT);
printf(_("Trying really trivial in-index merge...\n"));
- if (!read_tree_trivial(common->item->object.sha1,
- head_commit->object.sha1,
- remoteheads->item->object.sha1)) {
+ if (!read_tree_trivial(common->item->object.oid.hash,
+ head_commit->object.oid.hash,
+ remoteheads->item->object.oid.hash)) {
ret = merge_trivial(head_commit, remoteheads);
goto done;
}
@@ -1485,8 +1499,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* HEAD^^" would be missed.
*/
common_one = get_merge_bases(head_commit, j->item);
- if (hashcmp(common_one->item->object.sha1,
- j->item->object.sha1)) {
+ if (hashcmp(common_one->item->object.oid.hash,
+ j->item->object.oid.hash)) {
up_to_date = 0;
break;
}
@@ -1522,7 +1536,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
int ret;
if (i) {
printf(_("Rewinding the tree to pristine...\n"));
- restore_state(head_commit->object.sha1, stash);
+ restore_state(head_commit->object.oid.hash, stash);
}
if (use_strategies_nr != 1)
printf(_("Trying merge strategy %s...\n"),
@@ -1588,7 +1602,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
* it up.
*/
if (!best_strategy) {
- restore_state(head_commit->object.sha1, stash);
+ restore_state(head_commit->object.oid.hash, stash);
if (use_strategies_nr > 1)
fprintf(stderr,
_("No merge strategy handled the merge.\n"));
@@ -1601,7 +1615,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
; /* We already have its result in the working tree. */
else {
printf(_("Rewinding the tree to pristine...\n"));
- restore_state(head_commit->object.sha1, stash);
+ restore_state(head_commit->object.oid.hash, stash);
printf(_("Using the %s to prepare resolving by hand.\n"),
best_strategy);
try_merge_strategy(best_strategy, common, remoteheads,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 17:27:03 +0000