static int try_merge_strategy(const char *strategy, struct commit_list *common,
const char *head_arg)
{
const char **args;
int i = 0, ret;
struct commit_list *j;
struct strbuf buf = STRBUF_INIT;
int index_fd;
struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
index_fd = hold_locked_index(lock, 1);
refresh_cache(REFRESH_QUIET);
if (active_cache_changed &&
(write_cache(index_fd, active_cache, active_nr) ||
commit_locked_index(lock)))
return error("Unable to write index.");
rollback_lock_file(lock);
if (!strcmp(strategy, "recursive") || !strcmp(strategy, "subtree")) {
int clean;
struct commit *result;
struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
int index_fd;
struct commit_list *reversed = NULL;
struct merge_options o;
if (remoteheads->next) {
error("Not handling anything other than two heads merge.");
return 2;
}
init_merge_options(&o);
if (!strcmp(strategy, "subtree"))
o.subtree_merge = 1;
o.branch1 = head_arg;
o.branch2 = remoteheads->item->util;
for (j = common; j; j = j->next)
commit_list_insert(j->item, &reversed);
index_fd = hold_locked_index(lock, 1);
clean = merge_recursive(&o, lookup_commit(head),
remoteheads->item, reversed, &result);
if (active_cache_changed &&
(write_cache(index_fd, active_cache, active_nr) ||
commit_locked_index(lock)))
die ("unable to write %s", get_index_file());
rollback_lock_file(lock);
return clean ? 0 : 1;
} else {
args = xmalloc((4 + commit_list_count(common) +
commit_list_count(remoteheads)) * sizeof(char *));
strbuf_addf(&buf, "merge-%s", strategy);
args[i++] = buf.buf;
for (j = common; j; j = j->next)
args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
args[i++] = "--";
args[i++] = head_arg;
for (j = remoteheads; j; j = j->next)
args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
args[i] = NULL;
ret = run_command_v_opt(args, RUN_GIT_CMD);
strbuf_release(&buf);
i = 1;
for (j = common; j; j = j->next)
free((void *)args[i++]);
i += 2;
for (j = remoteheads; j; j = j->next)
free((void *)args[i++]);
free(args);
discard_cache();
if (read_cache() < 0)
die("failed to read the cache");
return ret;
}
}
int cmd_merge(int argc, const char **argv, const char *prefix)
{
unsigned char result_tree[20];
struct strbuf buf;
const char *head_arg;
int flag, head_invalid = 0, i;
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 **remotes = &remoteheads;
setup_work_tree();
if (unmerged_cache())
die("You are in the middle of a conflicted merge.");
/*
* Check if we are _not_ on a detached HEAD, i.e. if there is a
* current branch.
*/
branch = resolve_ref("HEAD", head, 0, &flag);
if (branch && !prefixcmp(branch, "refs/heads/"))
branch += 11;
if (is_null_sha1(head))
head_invalid = 1;
git_config(git_merge_config, NULL);
/* for color.ui */
if (diff_use_color_default == -1)
diff_use_color_default = git_use_color_default;
argc = parse_options(argc, argv, builtin_merge_options,
builtin_merge_usage, 0);
if (squash) {
if (!allow_fast_forward)
die("You cannot combine --squash with --no-ff.");
option_commit = 0;
}
if (!argc)
usage_with_options(builtin_merge_usage,
builtin_merge_options);
/*
* This could be traditional "merge <msg> HEAD <commit>..." and
* the way we can tell it is to see if the second token is HEAD,
* but some people might have misused the interface and used a
* committish that is the same as HEAD there instead.
* Traditional format never would have "-m" so it is an
* additional safety measure to check for it.
*/
strbuf_init(&buf, 0);
if (!have_message && is_old_style_invocation(argc, argv)) {
strbuf_addstr(&merge_msg, argv[0]);
head_arg = argv[1];
argv += 2;
argc -= 2;
} else if (head_invalid) {
struct object *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".
*/
if (argc != 1)
die("Can merge only exactly one commit into "
"empty head");
remote_head = peel_to_type(argv[0], 0, NULL, OBJ_COMMIT);
if (!remote_head)
die("%s - not something we can merge", argv[0]);
update_ref("initial pull", "HEAD", remote_head->sha1, NULL, 0,
DIE_ON_ERR);
reset_hard(remote_head->sha1, 0);
return 0;
} else {
struct strbuf msg;
/* We are invoked directly as the first-class UI. */
head_arg = "HEAD";
/*
* All the rest are the commits being merged;
* prepare the standard merge summary message to
* be appended to the given message. If remote
* is invalid we will die later in the common
* codepath so we discard the error in this
* loop.
*/
strbuf_init(&msg, 0);
for (i = 0; i < argc; i++)
merge_name(argv[i], &msg);
fmt_merge_msg(option_log, &msg, &merge_msg);
if (merge_msg.len)
strbuf_setlen(&merge_msg, merge_msg.len-1);
}
if (head_invalid || !argc)
usage_with_options(builtin_merge_usage,
builtin_merge_options);
strbuf_addstr(&buf, "merge");
for (i = 0; i < argc; i++)
strbuf_addf(&buf, " %s", argv[i]);
setenv("GIT_REFLOG_ACTION", buf.buf, 0);
strbuf_reset(&buf);
for (i = 0; i < argc; i++) {
struct object *o;
o = peel_to_type(argv[i], 0, NULL, OBJ_COMMIT);
if (!o)
die("%s - not something we can merge", argv[i]);
remotes = &commit_list_insert(lookup_commit(o->sha1),
remotes)->next;
strbuf_addf(&buf, "GITHEAD_%s", sha1_to_hex(o->sha1));
setenv(buf.buf, argv[i], 1);
strbuf_reset(&buf);
}
if (!use_strategies) {
if (!remoteheads->next)
add_strategies(pull_twohead, DEFAULT_TWOHEAD);
else
add_strategies(pull_octopus, DEFAULT_OCTOPUS);
}
for (i = 0; i < use_strategies_nr; i++) {
if (use_strategies[i]->attr & NO_FAST_FORWARD)
allow_fast_forward = 0;
if (use_strategies[i]->attr & NO_TRIVIAL)
allow_trivial = 0;
}
if (!remoteheads->next)
common = get_merge_bases(lookup_commit(head),
remoteheads->item, 1);
else {
struct commit_list *list = remoteheads;
commit_list_insert(lookup_commit(head), &list);
common = get_octopus_merge_bases(list);
free(list);
}
update_ref("updating ORIG_HEAD", "ORIG_HEAD", head, NULL, 0,
DIE_ON_ERR);
if (!common)
; /* No common ancestors found. We need a real merge. */
else if (!remoteheads->next && !common->next &&
common->item == remoteheads->item) {
/*
* If head can reach all the merge then we are up to date.
* but first the most common case of merging one remote.
*/
finish_up_to_date("Already up-to-date.");
return 0;
} else if (allow_fast_forward && !remoteheads->next &&
!common->next &&
!hashcmp(common->item->object.sha1, head)) {
/* Again the most common case of merging one remote. */
struct strbuf msg;
struct object *o;
char hex[41];
strcpy(hex, find_unique_abbrev(head, DEFAULT_ABBREV));
printf("Updating %s..%s\n",
hex,
find_unique_abbrev(remoteheads->item->object.sha1,
DEFAULT_ABBREV));
refresh_cache(REFRESH_QUIET);
strbuf_init(&msg, 0);
strbuf_addstr(&msg, "Fast forward");
if (have_message)
strbuf_addstr(&msg,
" (no commit created; -m option ignored)");
o = peel_to_type(sha1_to_hex(remoteheads->item->object.sha1),
0, NULL, OBJ_COMMIT);
if (!o)
return 1;
if (checkout_fast_forward(head, remoteheads->item->object.sha1))
return 1;
finish(o->sha1, msg.buf);
drop_save();
return 0;
} else if (!remoteheads->next && common->next)
;
/*
* We are not doing octopus and not fast forward. Need
* a real merge.
*/
else if (!remoteheads->next && !common->next && option_commit) {
/*
* We are not doing octopus, not fast forward, and have
* only one common.
*/
refresh_cache(REFRESH_QUIET);
if (allow_trivial) {
/* See if it is really trivial. */
git_committer_info(IDENT_ERROR_ON_NO_NAME);
printf("Trying really trivial in-index merge...\n");
if (!read_tree_trivial(common->item->object.sha1,
head, remoteheads->item->object.sha1))
return merge_trivial();
printf("Nope.\n");
}
} else {
/*
* An octopus. If we can reach all the remote we are up
* to date.
*/
int up_to_date = 1;
struct commit_list *j;
for (j = remoteheads; j; j = j->next) {
struct commit_list *common_one;
/*
* Here we *have* to calculate the individual
* merge_bases again, otherwise "git merge HEAD^
* HEAD^^" would be missed.
*/
common_one = get_merge_bases(lookup_commit(head),
j->item, 1);
if (hashcmp(common_one->item->object.sha1,
j->item->object.sha1)) {
up_to_date = 0;
break;
}
}
if (up_to_date) {
finish_up_to_date("Already up-to-date. Yeeah!");
return 0;
}
}
/* We are going to make a new commit. */
git_committer_info(IDENT_ERROR_ON_NO_NAME);
/*
* At this point, we need a real merge. No matter what strategy
* we use, it would operate on the index, possibly affecting the
* working tree, and when resolved cleanly, have the desired
* tree in the index -- this means that the index must be in
* sync with the head commit. The strategies are responsible
* to ensure this.
*/
if (use_strategies_nr != 1) {
/*
* Stash away the local changes so that we can try more
* than one.
*/
save_state();
} else {
memcpy(stash, null_sha1, 20);
}
for (i = 0; i < use_strategies_nr; i++) {
int ret;
if (i) {
printf("Rewinding the tree to pristine...\n");
restore_state();
}
if (use_strategies_nr != 1)
printf("Trying merge strategy %s...\n",
use_strategies[i]->name);
/*
* Remember which strategy left the state in the working
* tree.
*/
wt_strategy = use_strategies[i]->name;
ret = try_merge_strategy(use_strategies[i]->name,
common, head_arg);
if (!option_commit && !ret) {
merge_was_ok = 1;
/*
* This is necessary here just to avoid writing
* the tree, but later we will *not* exit with
* status code 1 because merge_was_ok is set.
*/
ret = 1;
}
if (ret) {
/*
* The backend exits with 1 when conflicts are
* left to be resolved, with 2 when it does not
* handle the given merge at all.
*/
if (ret == 1) {
int cnt = evaluate_result();
if (best_cnt <= 0 || cnt <= best_cnt) {
best_strategy = use_strategies[i]->name;
best_cnt = cnt;
}
}
if (merge_was_ok)
break;
else
continue;
}
/* Automerge succeeded. */
write_tree_trivial(result_tree);
automerge_was_ok = 1;
break;
}
/*
* If we have a resulting tree, that means the strategy module
* auto resolved the merge cleanly.
*/
if (automerge_was_ok)
return finish_automerge(common, result_tree, wt_strategy);
/*
* Pick the result from the best strategy and have the user fix
* it up.
*/
if (!best_strategy) {
restore_state();
if (use_strategies_nr > 1)
fprintf(stderr,
"No merge strategy handled the merge.\n");
else
fprintf(stderr, "Merge with strategy %s failed.\n",
use_strategies[0]->name);
return 2;
} else if (best_strategy == wt_strategy)
; /* We already have its result in the working tree. */
else {
printf("Rewinding the tree to pristine...\n");
restore_state();
printf("Using the %s to prepare resolving by hand.\n",
best_strategy);
try_merge_strategy(best_strategy, common, head_arg);
}
if (squash)
finish(NULL, NULL);
else {
int fd;
struct commit_list *j;
for (j = remoteheads; j; j = j->next)
strbuf_addf(&buf, "%s\n",
sha1_to_hex(j->item->object.sha1));
fd = open(git_path("MERGE_HEAD"), O_WRONLY | O_CREAT, 0666);
if (fd < 0)
die("Could open %s for writing",
git_path("MERGE_HEAD"));
if (write_in_full(fd, buf.buf, buf.len) != buf.len)
die("Could not write to %s", git_path("MERGE_HEAD"));
close(fd);
strbuf_addch(&merge_msg, '\n');
fd = open(git_path("MERGE_MSG"), O_WRONLY | O_CREAT, 0666);
if (fd < 0)
die("Could open %s for writing", git_path("MERGE_MSG"));
if (write_in_full(fd, merge_msg.buf, merge_msg.len) !=
merge_msg.len)
die("Could not write to %s", git_path("MERGE_MSG"));
close(fd);
}
if (merge_was_ok) {
fprintf(stderr, "Automatic merge went well; "
"stopped before committing as requested\n");
return 0;
} else
return suggest_conflicts();
}
int cmd_commit(int argc, const char **argv, const char *prefix)
{
int header_len;
struct strbuf sb;
const char *index_file, *reflog_msg;
char *nl, *p;
unsigned char commit_sha1[20];
struct ref_lock *ref_lock;
git_config(git_commit_config);
argc = parse_and_validate_options(argc, argv, builtin_commit_usage);
index_file = prepare_index(argc, argv, prefix);
/* Set up everything for writing the commit object. This includes
running hooks, writing the trees, and interacting with the user. */
if (!prepare_to_commit(index_file, prefix)) {
rollback_index_files();
return 1;
}
/*
* The commit object
*/
strbuf_init(&sb, 0);
strbuf_addf(&sb, "tree %s\n",
sha1_to_hex(active_cache_tree->sha1));
/* Determine parents */
if (initial_commit) {
reflog_msg = "commit (initial)";
} else if (amend) {
struct commit_list *c;
struct commit *commit;
reflog_msg = "commit (amend)";
commit = lookup_commit(head_sha1);
if (!commit || parse_commit(commit))
die("could not parse HEAD commit");
for (c = commit->parents; c; c = c->next)
add_parent(&sb, c->item->object.sha1);
} else if (in_merge) {
struct strbuf m;
FILE *fp;
reflog_msg = "commit (merge)";
add_parent(&sb, head_sha1);
strbuf_init(&m, 0);
fp = fopen(git_path("MERGE_HEAD"), "r");
if (fp == NULL)
die("could not open %s for reading: %s",
git_path("MERGE_HEAD"), strerror(errno));
while (strbuf_getline(&m, fp, '\n') != EOF) {
unsigned char sha1[20];
if (get_sha1_hex(m.buf, sha1) < 0)
die("Corrupt MERGE_HEAD file (%s)", m.buf);
add_parent(&sb, sha1);
}
fclose(fp);
strbuf_release(&m);
} else {
reflog_msg = "commit";
strbuf_addf(&sb, "parent %s\n", sha1_to_hex(head_sha1));
}
strbuf_addf(&sb, "author %s\n",
fmt_ident(author_name, author_email, author_date, IDENT_ERROR_ON_NO_NAME));
strbuf_addf(&sb, "committer %s\n", git_committer_info(IDENT_ERROR_ON_NO_NAME));
if (!is_encoding_utf8(git_commit_encoding))
strbuf_addf(&sb, "encoding %s\n", git_commit_encoding);
strbuf_addch(&sb, '\n');
/* Finally, get the commit message */
header_len = sb.len;
if (strbuf_read_file(&sb, git_path(commit_editmsg), 0) < 0) {
rollback_index_files();
die("could not read commit message");
}
/* Truncate the message just before the diff, if any. */
p = strstr(sb.buf, "\ndiff --git a/");
if (p != NULL)
strbuf_setlen(&sb, p - sb.buf + 1);
if (cleanup_mode != CLEANUP_NONE)
stripspace(&sb, cleanup_mode == CLEANUP_ALL);
if (sb.len < header_len || message_is_empty(&sb, header_len)) {
rollback_index_files();
die("no commit message? aborting commit.");
}
strbuf_addch(&sb, '\0');
if (is_encoding_utf8(git_commit_encoding) && !is_utf8(sb.buf))
fprintf(stderr, commit_utf8_warn);
if (write_sha1_file(sb.buf, sb.len - 1, commit_type, commit_sha1)) {
rollback_index_files();
die("failed to write commit object");
}
ref_lock = lock_any_ref_for_update("HEAD",
initial_commit ? NULL : head_sha1,
0);
nl = strchr(sb.buf + header_len, '\n');
if (nl)
strbuf_setlen(&sb, nl + 1 - sb.buf);
else
strbuf_addch(&sb, '\n');
strbuf_remove(&sb, 0, header_len);
strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg));
strbuf_insert(&sb, strlen(reflog_msg), ": ", 2);
if (!ref_lock) {
rollback_index_files();
die("cannot lock HEAD ref");
}
if (write_ref_sha1(ref_lock, commit_sha1, sb.buf) < 0) {
rollback_index_files();
die("cannot update HEAD ref");
}
unlink(git_path("MERGE_HEAD"));
unlink(git_path("MERGE_MSG"));
unlink(git_path("SQUASH_MSG"));
if (commit_index_files())
die ("Repository has been updated, but unable to write\n"
"new_index file. Check that disk is not full or quota is\n"
"not exceeded, and then \"git reset HEAD\" to recover.");
rerere();
run_hook(get_index_file(), "post-commit", NULL);
if (!quiet)
print_summary(prefix, commit_sha1);
return 0;
}
static int find_common(struct fetch_negotiator *negotiator,
struct fetch_pack_args *args,
int fd[2], struct object_id *result_oid,
struct ref *refs)
{
int fetching;
int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
const struct object_id *oid;
unsigned in_vain = 0;
int got_continue = 0;
int got_ready = 0;
struct strbuf req_buf = STRBUF_INIT;
size_t state_len = 0;
if (args->stateless_rpc && multi_ack == 1)
die(_("--stateless-rpc requires multi_ack_detailed"));
if (!args->no_dependents) {
mark_tips(negotiator, args->negotiation_tips);
for_each_cached_alternate(negotiator, insert_one_alternate_object);
}
fetching = 0;
for ( ; refs ; refs = refs->next) {
struct object_id *remote = &refs->old_oid;
const char *remote_hex;
struct object *o;
/*
* If that object is complete (i.e. it is an ancestor of a
* local ref), we tell them we have it but do not have to
* tell them about its ancestors, which they already know
* about.
*
* We use lookup_object here because we are only
* interested in the case we *know* the object is
* reachable and we have already scanned it.
*
* Do this only if args->no_dependents is false (if it is true,
* we cannot trust the object flags).
*/
if (!args->no_dependents &&
((o = lookup_object(the_repository, remote->hash)) != NULL) &&
(o->flags & COMPLETE)) {
continue;
}
remote_hex = oid_to_hex(remote);
if (!fetching) {
struct strbuf c = STRBUF_INIT;
if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
if (no_done) strbuf_addstr(&c, " no-done");
if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
if (use_sideband == 1) strbuf_addstr(&c, " side-band");
if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
if (args->no_progress) strbuf_addstr(&c, " no-progress");
if (args->include_tag) strbuf_addstr(&c, " include-tag");
if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
if (agent_supported) strbuf_addf(&c, " agent=%s",
git_user_agent_sanitized());
if (args->filter_options.choice)
strbuf_addstr(&c, " filter");
packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
strbuf_release(&c);
} else
packet_buf_write(&req_buf, "want %s\n", remote_hex);
fetching++;
}
if (!fetching) {
strbuf_release(&req_buf);
packet_flush(fd[1]);
return 1;
}
if (is_repository_shallow(the_repository))
write_shallow_commits(&req_buf, 1, NULL);
if (args->depth > 0)
packet_buf_write(&req_buf, "deepen %d", args->depth);
if (args->deepen_since) {
timestamp_t max_age = approxidate(args->deepen_since);
packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
}
if (args->deepen_not) {
int i;
for (i = 0; i < args->deepen_not->nr; i++) {
struct string_list_item *s = args->deepen_not->items + i;
packet_buf_write(&req_buf, "deepen-not %s", s->string);
}
}
if (server_supports_filtering && args->filter_options.choice)
packet_buf_write(&req_buf, "filter %s",
args->filter_options.filter_spec);
packet_buf_flush(&req_buf);
state_len = req_buf.len;
if (args->deepen) {
char *line;
const char *arg;
struct object_id oid;
send_request(args, fd[1], &req_buf);
while ((line = packet_read_line(fd[0], NULL))) {
if (skip_prefix(line, "shallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid shallow line: %s"), line);
register_shallow(the_repository, &oid);
continue;
}
if (skip_prefix(line, "unshallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid unshallow line: %s"), line);
if (!lookup_object(the_repository, oid.hash))
die(_("object not found: %s"), line);
/* make sure that it is parsed as shallow */
if (!parse_object(the_repository, &oid))
die(_("error in object: %s"), line);
if (unregister_shallow(&oid))
die(_("no shallow found: %s"), line);
continue;
}
die(_("expected shallow/unshallow, got %s"), line);
}
} else if (!args->stateless_rpc)
send_request(args, fd[1], &req_buf);
if (!args->stateless_rpc) {
/* If we aren't using the stateless-rpc interface
* we don't need to retain the headers.
*/
strbuf_setlen(&req_buf, 0);
state_len = 0;
}
flushes = 0;
retval = -1;
if (args->no_dependents)
goto done;
while ((oid = negotiator->next(negotiator))) {
packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
print_verbose(args, "have %s", oid_to_hex(oid));
in_vain++;
if (flush_at <= ++count) {
int ack;
packet_buf_flush(&req_buf);
send_request(args, fd[1], &req_buf);
strbuf_setlen(&req_buf, state_len);
flushes++;
flush_at = next_flush(args->stateless_rpc, count);
/*
* We keep one window "ahead" of the other side, and
* will wait for an ACK only on the next one
*/
if (!args->stateless_rpc && count == INITIAL_FLUSH)
continue;
consume_shallow_list(args, fd[0]);
do {
ack = get_ack(fd[0], result_oid);
if (ack)
print_verbose(args, _("got %s %d %s"), "ack",
ack, oid_to_hex(result_oid));
switch (ack) {
case ACK:
flushes = 0;
multi_ack = 0;
retval = 0;
goto done;
case ACK_common:
case ACK_ready:
case ACK_continue: {
struct commit *commit =
lookup_commit(the_repository,
result_oid);
int was_common;
if (!commit)
die(_("invalid commit %s"), oid_to_hex(result_oid));
was_common = negotiator->ack(negotiator, commit);
if (args->stateless_rpc
&& ack == ACK_common
&& !was_common) {
/* We need to replay the have for this object
* on the next RPC request so the peer knows
* it is in common with us.
*/
const char *hex = oid_to_hex(result_oid);
packet_buf_write(&req_buf, "have %s\n", hex);
state_len = req_buf.len;
/*
* Reset in_vain because an ack
* for this commit has not been
* seen.
*/
in_vain = 0;
} else if (!args->stateless_rpc
|| ack != ACK_common)
in_vain = 0;
retval = 0;
got_continue = 1;
if (ack == ACK_ready)
got_ready = 1;
break;
}
}
} while (ack);
flushes--;
if (got_continue && MAX_IN_VAIN < in_vain) {
print_verbose(args, _("giving up"));
break; /* give up */
}
if (got_ready)
break;
}
}
done:
if (!got_ready || !no_done) {
packet_buf_write(&req_buf, "done\n");
send_request(args, fd[1], &req_buf);
}
print_verbose(args, _("done"));
if (retval != 0) {
multi_ack = 0;
flushes++;
}
strbuf_release(&req_buf);
if (!got_ready || !no_done)
consume_shallow_list(args, fd[0]);
while (flushes || multi_ack) {
int ack = get_ack(fd[0], result_oid);
if (ack) {
print_verbose(args, _("got %s (%d) %s"), "ack",
ack, oid_to_hex(result_oid));
if (ack == ACK)
return 0;
multi_ack = 1;
continue;
}
flushes--;
}
/* it is no error to fetch into a completely empty repo */
return count ? retval : 0;
}
int cmd_commit(int argc, const char **argv, const char *prefix)
{
struct strbuf sb = STRBUF_INIT;
const char *index_file, *reflog_msg;
char *nl, *p;
unsigned char commit_sha1[20];
struct ref_lock *ref_lock;
struct commit_list *parents = NULL, **pptr = &parents;
struct stat statbuf;
int allow_fast_forward = 1;
struct wt_status s;
wt_status_prepare(&s);
git_config(git_commit_config, &s);
in_merge = file_exists(git_path("MERGE_HEAD"));
s.in_merge = in_merge;
if (s.use_color == -1)
s.use_color = git_use_color_default;
argc = parse_and_validate_options(argc, argv, builtin_commit_usage,
prefix, &s);
if (dry_run) {
if (diff_use_color_default == -1)
diff_use_color_default = git_use_color_default;
return dry_run_commit(argc, argv, prefix, &s);
}
index_file = prepare_index(argc, argv, prefix, 0);
/* Set up everything for writing the commit object. This includes
running hooks, writing the trees, and interacting with the user. */
if (!prepare_to_commit(index_file, prefix, &s)) {
rollback_index_files();
return 1;
}
/* Determine parents */
reflog_msg = getenv("GIT_REFLOG_ACTION");
if (initial_commit) {
if (!reflog_msg)
reflog_msg = "commit (initial)";
} else if (amend) {
struct commit_list *c;
struct commit *commit;
if (!reflog_msg)
reflog_msg = "commit (amend)";
commit = lookup_commit(head_sha1);
if (!commit || parse_commit(commit))
die("could not parse HEAD commit");
for (c = commit->parents; c; c = c->next)
pptr = &commit_list_insert(c->item, pptr)->next;
} else if (in_merge) {
struct strbuf m = STRBUF_INIT;
FILE *fp;
if (!reflog_msg)
reflog_msg = "commit (merge)";
pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
fp = fopen(git_path("MERGE_HEAD"), "r");
if (fp == NULL)
die_errno("could not open '%s' for reading",
git_path("MERGE_HEAD"));
while (strbuf_getline(&m, fp, '\n') != EOF) {
unsigned char sha1[20];
if (get_sha1_hex(m.buf, sha1) < 0)
die("Corrupt MERGE_HEAD file (%s)", m.buf);
pptr = &commit_list_insert(lookup_commit(sha1), pptr)->next;
}
fclose(fp);
strbuf_release(&m);
if (!stat(git_path("MERGE_MODE"), &statbuf)) {
if (strbuf_read_file(&sb, git_path("MERGE_MODE"), 0) < 0)
die_errno("could not read MERGE_MODE");
if (!strcmp(sb.buf, "no-ff"))
allow_fast_forward = 0;
}
if (allow_fast_forward)
parents = reduce_heads(parents);
} else {
if (!reflog_msg)
reflog_msg = "commit";
pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
}
/* Finally, get the commit message */
strbuf_reset(&sb);
if (strbuf_read_file(&sb, git_path(commit_editmsg), 0) < 0) {
int saved_errno = errno;
rollback_index_files();
die("could not read commit message: %s", strerror(saved_errno));
}
/* Truncate the message just before the diff, if any. */
if (verbose) {
p = strstr(sb.buf, "\ndiff --git ");
if (p != NULL)
strbuf_setlen(&sb, p - sb.buf + 1);
}
if (cleanup_mode != CLEANUP_NONE)
stripspace(&sb, cleanup_mode == CLEANUP_ALL);
if (message_is_empty(&sb) && !allow_empty_message) {
rollback_index_files();
fprintf(stderr, "Aborting commit due to empty commit message.\n");
exit(1);
}
if (commit_tree(sb.buf, active_cache_tree->sha1, parents, commit_sha1,
fmt_ident(author_name, author_email, author_date,
IDENT_ERROR_ON_NO_NAME))) {
rollback_index_files();
die("failed to write commit object");
}
ref_lock = lock_any_ref_for_update("HEAD",
initial_commit ? NULL : head_sha1,
0);
nl = strchr(sb.buf, '\n');
if (nl)
strbuf_setlen(&sb, nl + 1 - sb.buf);
else
strbuf_addch(&sb, '\n');
strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg));
strbuf_insert(&sb, strlen(reflog_msg), ": ", 2);
if (!ref_lock) {
rollback_index_files();
die("cannot lock HEAD ref");
}
if (write_ref_sha1(ref_lock, commit_sha1, sb.buf) < 0) {
rollback_index_files();
die("cannot update HEAD ref");
}
unlink(git_path("MERGE_HEAD"));
unlink(git_path("MERGE_MSG"));
unlink(git_path("MERGE_MODE"));
unlink(git_path("SQUASH_MSG"));
if (commit_index_files())
die ("Repository has been updated, but unable to write\n"
"new_index file. Check that disk is not full or quota is\n"
"not exceeded, and then \"git reset HEAD\" to recover.");
rerere(0);
run_hook(get_index_file(), "post-commit", NULL);
if (amend && !no_post_rewrite) {
struct notes_rewrite_cfg *cfg;
cfg = init_copy_notes_for_rewrite("amend");
if (cfg) {
copy_note_for_rewrite(cfg, head_sha1, commit_sha1);
finish_copy_notes_for_rewrite(cfg);
}
run_rewrite_hook(head_sha1, commit_sha1);
}
if (!quiet)
print_summary(prefix, commit_sha1);
return 0;
}
static void print_summary(const char *prefix, const unsigned char *sha1)
{
struct rev_info rev;
struct commit *commit;
struct strbuf format = STRBUF_INIT;
unsigned char junk_sha1[20];
const char *head = resolve_ref("HEAD", junk_sha1, 0, NULL);
struct pretty_print_context pctx = {0};
struct strbuf author_ident = STRBUF_INIT;
struct strbuf committer_ident = STRBUF_INIT;
commit = lookup_commit(sha1);
if (!commit)
die("couldn't look up newly created commit");
if (!commit || parse_commit(commit))
die("could not parse newly created commit");
strbuf_addstr(&format, "format:%h] %s");
format_commit_message(commit, "%an <%ae>", &author_ident, &pctx);
format_commit_message(commit, "%cn <%ce>", &committer_ident, &pctx);
if (strbuf_cmp(&author_ident, &committer_ident)) {
strbuf_addstr(&format, "\n Author: ");
strbuf_addbuf_percentquote(&format, &author_ident);
}
if (!user_ident_sufficiently_given()) {
strbuf_addstr(&format, "\n Committer: ");
strbuf_addbuf_percentquote(&format, &committer_ident);
if (advice_implicit_identity) {
strbuf_addch(&format, '\n');
strbuf_addstr(&format, implicit_ident_advice);
}
}
strbuf_release(&author_ident);
strbuf_release(&committer_ident);
init_revisions(&rev, prefix);
setup_revisions(0, NULL, &rev, NULL);
rev.diff = 1;
rev.diffopt.output_format =
DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_SUMMARY;
rev.verbose_header = 1;
rev.show_root_diff = 1;
get_commit_format(format.buf, &rev);
rev.always_show_header = 0;
rev.diffopt.detect_rename = 1;
rev.diffopt.rename_limit = 100;
rev.diffopt.break_opt = 0;
diff_setup_done(&rev.diffopt);
printf("[%s%s ",
!prefixcmp(head, "refs/heads/") ?
head + 11 :
!strcmp(head, "HEAD") ?
"detached HEAD" :
head,
initial_commit ? " (root-commit)" : "");
if (!log_tree_commit(&rev, commit)) {
rev.always_show_header = 1;
rev.use_terminator = 1;
log_tree_commit(&rev, commit);
}
strbuf_release(&format);
}
static int find_common(struct fetch_pack_args *args,
int fd[2], unsigned char *result_sha1,
struct ref *refs)
{
int fetching;
int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
const unsigned char *sha1;
unsigned in_vain = 0;
int got_continue = 0;
int got_ready = 0;
struct strbuf req_buf = STRBUF_INIT;
size_t state_len = 0;
if (args->stateless_rpc && multi_ack == 1)
die("--stateless-rpc requires multi_ack_detailed");
if (marked)
for_each_ref(clear_marks, NULL);
marked = 1;
for_each_ref(rev_list_insert_ref_oid, NULL);
for_each_alternate_ref(insert_one_alternate_ref, NULL);
fetching = 0;
for ( ; refs ; refs = refs->next) {
unsigned char *remote = refs->old_oid.hash;
const char *remote_hex;
struct object *o;
/*
* If that object is complete (i.e. it is an ancestor of a
* local ref), we tell them we have it but do not have to
* tell them about its ancestors, which they already know
* about.
*
* We use lookup_object here because we are only
* interested in the case we *know* the object is
* reachable and we have already scanned it.
*/
if (((o = lookup_object(remote)) != NULL) &&
(o->flags & COMPLETE)) {
continue;
}
remote_hex = sha1_to_hex(remote);
if (!fetching) {
struct strbuf c = STRBUF_INIT;
if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
if (no_done) strbuf_addstr(&c, " no-done");
if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
if (use_sideband == 1) strbuf_addstr(&c, " side-band");
if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
if (args->no_progress) strbuf_addstr(&c, " no-progress");
if (args->include_tag) strbuf_addstr(&c, " include-tag");
if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
if (agent_supported) strbuf_addf(&c, " agent=%s",
git_user_agent_sanitized());
packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
strbuf_release(&c);
} else
packet_buf_write(&req_buf, "want %s\n", remote_hex);
fetching++;
}
if (!fetching) {
strbuf_release(&req_buf);
packet_flush(fd[1]);
return 1;
}
if (is_repository_shallow())
write_shallow_commits(&req_buf, 1, NULL);
if (args->depth > 0)
packet_buf_write(&req_buf, "deepen %d", args->depth);
packet_buf_flush(&req_buf);
state_len = req_buf.len;
if (args->depth > 0) {
char *line;
const char *arg;
unsigned char sha1[20];
send_request(args, fd[1], &req_buf);
while ((line = packet_read_line(fd[0], NULL))) {
if (skip_prefix(line, "shallow ", &arg)) {
if (get_sha1_hex(arg, sha1))
die("invalid shallow line: %s", line);
register_shallow(sha1);
continue;
}
if (skip_prefix(line, "unshallow ", &arg)) {
if (get_sha1_hex(arg, sha1))
die("invalid unshallow line: %s", line);
if (!lookup_object(sha1))
die("object not found: %s", line);
/* make sure that it is parsed as shallow */
if (!parse_object(sha1))
die("error in object: %s", line);
if (unregister_shallow(sha1))
die("no shallow found: %s", line);
continue;
}
die("expected shallow/unshallow, got %s", line);
}
} else if (!args->stateless_rpc)
send_request(args, fd[1], &req_buf);
if (!args->stateless_rpc) {
/* If we aren't using the stateless-rpc interface
* we don't need to retain the headers.
*/
strbuf_setlen(&req_buf, 0);
state_len = 0;
}
flushes = 0;
retval = -1;
while ((sha1 = get_rev())) {
packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1));
if (args->verbose)
fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
in_vain++;
if (flush_at <= ++count) {
int ack;
packet_buf_flush(&req_buf);
send_request(args, fd[1], &req_buf);
strbuf_setlen(&req_buf, state_len);
flushes++;
flush_at = next_flush(args, count);
/*
* We keep one window "ahead" of the other side, and
* will wait for an ACK only on the next one
*/
if (!args->stateless_rpc && count == INITIAL_FLUSH)
continue;
consume_shallow_list(args, fd[0]);
do {
ack = get_ack(fd[0], result_sha1);
if (args->verbose && ack)
fprintf(stderr, "got ack %d %s\n", ack,
sha1_to_hex(result_sha1));
switch (ack) {
case ACK:
flushes = 0;
multi_ack = 0;
retval = 0;
goto done;
case ACK_common:
case ACK_ready:
case ACK_continue: {
struct commit *commit =
lookup_commit(result_sha1);
if (!commit)
die("invalid commit %s", sha1_to_hex(result_sha1));
if (args->stateless_rpc
&& ack == ACK_common
&& !(commit->object.flags & COMMON)) {
/* We need to replay the have for this object
* on the next RPC request so the peer knows
* it is in common with us.
*/
const char *hex = sha1_to_hex(result_sha1);
packet_buf_write(&req_buf, "have %s\n", hex);
state_len = req_buf.len;
}
mark_common(commit, 0, 1);
retval = 0;
in_vain = 0;
got_continue = 1;
if (ack == ACK_ready) {
clear_prio_queue(&rev_list);
got_ready = 1;
}
break;
}
}
} while (ack);
flushes--;
if (got_continue && MAX_IN_VAIN < in_vain) {
if (args->verbose)
fprintf(stderr, "giving up\n");
break; /* give up */
}
}
}
done:
if (!got_ready || !no_done) {
packet_buf_write(&req_buf, "done\n");
send_request(args, fd[1], &req_buf);
}
if (args->verbose)
fprintf(stderr, "done\n");
if (retval != 0) {
multi_ack = 0;
flushes++;
}
strbuf_release(&req_buf);
if (!got_ready || !no_done)
consume_shallow_list(args, fd[0]);
while (flushes || multi_ack) {
int ack = get_ack(fd[0], result_sha1);
if (ack) {
if (args->verbose)
fprintf(stderr, "got ack (%d) %s\n", ack,
sha1_to_hex(result_sha1));
if (ack == ACK)
return 0;
multi_ack = 1;
continue;
}
flushes--;
}
/* it is no error to fetch into a completely empty repo */
return count ? retval : 0;
}
int cmd_commit_tree(int argc, const char **argv, const char *prefix)
{
int i, got_tree = 0;
struct commit_list *parents = NULL;
unsigned char tree_sha1[20];
unsigned char commit_sha1[20];
struct strbuf buffer = STRBUF_INIT;
git_config(git_default_config, NULL);
if (argc < 2 || !strcmp(argv[1], "-h"))
usage(commit_tree_usage);
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "-p")) {
unsigned char sha1[20];
if (argc <= ++i)
usage(commit_tree_usage);
if (get_sha1(argv[i], sha1))
die("Not a valid object name %s", argv[i]);
assert_sha1_type(sha1, OBJ_COMMIT);
new_parent(lookup_commit(sha1), &parents);
continue;
}
if (!strcmp(arg, "-m")) {
if (argc <= ++i)
usage(commit_tree_usage);
if (buffer.len)
strbuf_addch(&buffer, '\n');
strbuf_addstr(&buffer, argv[i]);
strbuf_complete_line(&buffer);
continue;
}
if (!strcmp(arg, "-F")) {
int fd;
if (argc <= ++i)
usage(commit_tree_usage);
if (buffer.len)
strbuf_addch(&buffer, '\n');
if (!strcmp(argv[i], "-"))
fd = 0;
else {
fd = open(argv[i], O_RDONLY);
if (fd < 0)
die_errno("git commit-tree: failed to open '%s'",
argv[i]);
}
if (strbuf_read(&buffer, fd, 0) < 0)
die_errno("git commit-tree: failed to read '%s'",
argv[i]);
if (fd && close(fd))
die_errno("git commit-tree: failed to close '%s'",
argv[i]);
strbuf_complete_line(&buffer);
continue;
}
if (get_sha1(arg, tree_sha1))
die("Not a valid object name %s", arg);
if (got_tree)
die("Cannot give more than one trees");
got_tree = 1;
}
if (!buffer.len) {
if (strbuf_read(&buffer, 0, 0) < 0)
die_errno("git commit-tree: failed to read");
}
if (commit_tree(&buffer, tree_sha1, parents, commit_sha1, NULL)) {
strbuf_release(&buffer);
return 1;
}
printf("%s\n", sha1_to_hex(commit_sha1));
strbuf_release(&buffer);
return 0;
}
