static int do_pick_commit(void)
{
unsigned char head[20];
struct commit *base, *next, *parent;
const char *base_label, *next_label;
struct commit_message msg = { NULL, NULL, NULL, NULL, NULL };
char *defmsg = NULL;
struct strbuf msgbuf = STRBUF_INIT;
if (no_commit) {
/*
* We do not intend to commit immediately. We just want to
* merge the differences in, so let's compute the tree
* that represents the "current" state for merge-recursive
* to work on.
*/
if (write_cache_as_tree(head, 0, NULL))
die ("Your index file is unmerged.");
} else {
if (get_sha1("HEAD", head))
die ("You do not have a valid HEAD");
if (index_differs_from("HEAD", 0))
die_dirty_index(me);
}
discard_cache();
if (!commit->parents) {
if (action == REVERT)
die ("Cannot revert a root commit");
parent = NULL;
}
else if (commit->parents->next) {
/* Reverting or cherry-picking a merge commit */
int cnt;
struct commit_list *p;
if (!mainline)
die("Commit %s is a merge but no -m option was given.",
sha1_to_hex(commit->object.sha1));
for (cnt = 1, p = commit->parents;
cnt != mainline && p;
cnt++)
p = p->next;
if (cnt != mainline || !p)
die("Commit %s does not have parent %d",
sha1_to_hex(commit->object.sha1), mainline);
parent = p->item;
} else if (0 < mainline)
die("Mainline was specified but commit %s is not a merge.",
sha1_to_hex(commit->object.sha1));
else
parent = commit->parents->item;
if (allow_ff && !hashcmp(parent->object.sha1, head))
return fast_forward_to(commit->object.sha1, head);
if (parent && parse_commit(parent) < 0)
die("%s: cannot parse parent commit %s",
me, sha1_to_hex(parent->object.sha1));
if (get_message(commit->buffer, &msg) != 0)
die("Cannot get commit message for %s",
sha1_to_hex(commit->object.sha1));
/*
* "commit" is an existing commit. We would want to apply
* the difference it introduces since its first parent "prev"
* on top of the current HEAD if we are cherry-pick. Or the
* reverse of it if we are revert.
*/
defmsg = git_pathdup("MERGE_MSG");
if (action == REVERT) {
base = commit;
base_label = msg.label;
next = parent;
next_label = msg.parent_label;
strbuf_addstr(&msgbuf, "Revert \"");
strbuf_addstr(&msgbuf, msg.subject);
strbuf_addstr(&msgbuf, "\"\n\nThis reverts commit ");
strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
if (commit->parents->next) {
strbuf_addstr(&msgbuf, ", reversing\nchanges made to ");
strbuf_addstr(&msgbuf, sha1_to_hex(parent->object.sha1));
}
strbuf_addstr(&msgbuf, ".\n");
} else {
base = parent;
base_label = msg.parent_label;
next = commit;
next_label = msg.label;
set_author_ident_env(msg.message);
add_message_to_msg(&msgbuf, msg.message);
if (no_replay) {
strbuf_addstr(&msgbuf, "(cherry picked from commit ");
strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
strbuf_addstr(&msgbuf, ")\n");
}
}
if (!strategy || !strcmp(strategy, "recursive") || action == REVERT)
do_recursive_merge(base, next, base_label, next_label,
head, &msgbuf, defmsg);
else {
int res;
struct commit_list *common = NULL;
struct commit_list *remotes = NULL;
write_message(&msgbuf, defmsg);
commit_list_insert(base, &common);
commit_list_insert(next, &remotes);
res = try_merge_command(strategy, common,
sha1_to_hex(head), remotes);
free_commit_list(common);
free_commit_list(remotes);
if (res) {
fprintf(stderr, "Automatic %s with strategy %s failed.%s\n",
me, strategy, help_msg());
rerere(allow_rerere_auto);
exit(1);
}
}
free_message(&msg);
/*
*
* If we are cherry-pick, and if the merge did not result in
* hand-editing, we will hit this commit and inherit the original
* author date and name.
* If we are revert, or if our cherry-pick results in a hand merge,
* we had better say that the current user is responsible for that.
*/
if (!no_commit) {
/* 6 is max possible length of our args array including NULL */
const char *args[6];
int res;
int i = 0;
args[i++] = "commit";
args[i++] = "-n";
if (signoff)
args[i++] = "-s";
if (!edit) {
args[i++] = "-F";
args[i++] = defmsg;
}
args[i] = NULL;
res = run_command_v_opt(args, RUN_GIT_CMD);
free(defmsg);
return res;
}
free(defmsg);
return 0;
}
static int revert_or_cherry_pick(int argc, const char **argv)
{
unsigned char head[20];
struct commit *base, *next, *parent;
int i;
char *oneline, *reencoded_message = NULL;
const char *message, *encoding;
const char *defmsg = xstrdup(git_path("MERGE_MSG"));
git_config(git_default_config);
me = action == REVERT ? "revert" : "cherry-pick";
setenv(GIT_REFLOG_ACTION, me, 0);
parse_args(argc, argv);
/* this is copied from the shell script, but it's never triggered... */
if (action == REVERT && !no_replay)
die("revert is incompatible with replay");
if (no_commit) {
/*
* We do not intend to commit immediately. We just want to
* merge the differences in, so let's compute the tree
* that represents the "current" state for merge-recursive
* to work on.
*/
if (write_cache_as_tree(head, 0, NULL))
die ("Your index file is unmerged.");
} else {
if (get_sha1("HEAD", head))
die ("You do not have a valid HEAD");
if (read_cache() < 0)
die("could not read the index");
if (index_is_dirty())
die ("Dirty index: cannot %s", me);
discard_cache();
}
if (!commit->parents)
die ("Cannot %s a root commit", me);
if (commit->parents->next) {
/* Reverting or cherry-picking a merge commit */
int cnt;
struct commit_list *p;
if (!mainline)
die("Commit %s is a merge but no -m option was given.",
sha1_to_hex(commit->object.sha1));
for (cnt = 1, p = commit->parents;
cnt != mainline && p;
cnt++)
p = p->next;
if (cnt != mainline || !p)
die("Commit %s does not have parent %d",
sha1_to_hex(commit->object.sha1), mainline);
parent = p->item;
} else if (0 < mainline)
die("Mainline was specified but commit %s is not a merge.",
sha1_to_hex(commit->object.sha1));
else
parent = commit->parents->item;
if (!(message = commit->buffer))
die ("Cannot get commit message for %s",
sha1_to_hex(commit->object.sha1));
/*
* "commit" is an existing commit. We would want to apply
* the difference it introduces since its first parent "prev"
* on top of the current HEAD if we are cherry-pick. Or the
* reverse of it if we are revert.
*/
msg_fd = hold_lock_file_for_update(&msg_file, defmsg, 1);
encoding = get_encoding(message);
if (!encoding)
encoding = "utf-8";
if (!git_commit_encoding)
git_commit_encoding = "utf-8";
if ((reencoded_message = reencode_string(message,
git_commit_encoding, encoding)))
message = reencoded_message;
oneline = get_oneline(message);
if (action == REVERT) {
char *oneline_body = strchr(oneline, ' ');
base = commit;
next = parent;
add_to_msg("Revert \"");
add_to_msg(oneline_body + 1);
add_to_msg("\"\n\nThis reverts commit ");
add_to_msg(sha1_to_hex(commit->object.sha1));
add_to_msg(".\n");
} else {
base = parent;
next = commit;
set_author_ident_env(message);
add_message_to_msg(message);
if (no_replay) {
add_to_msg("(cherry picked from commit ");
add_to_msg(sha1_to_hex(commit->object.sha1));
add_to_msg(")\n");
}
}
if (merge_recursive(sha1_to_hex(base->object.sha1),
sha1_to_hex(head), "HEAD",
sha1_to_hex(next->object.sha1), oneline) ||
write_cache_as_tree(head, 0, NULL)) {
add_to_msg("\nConflicts:\n\n");
read_cache();
for (i = 0; i < active_nr;) {
struct cache_entry *ce = active_cache[i++];
if (ce_stage(ce)) {
add_to_msg("\t");
add_to_msg(ce->name);
add_to_msg("\n");
while (i < active_nr && !strcmp(ce->name,
active_cache[i]->name))
i++;
}
}
if (commit_lock_file(&msg_file) < 0)
die ("Error wrapping up %s", defmsg);
fprintf(stderr, "Automatic %s failed.%s\n",
me, help_msg(commit->object.sha1));
exit(1);
}
if (commit_lock_file(&msg_file) < 0)
die ("Error wrapping up %s", defmsg);
fprintf(stderr, "Finished one %s.\n", me);
/*
*
* If we are cherry-pick, and if the merge did not result in
* hand-editing, we will hit this commit and inherit the original
* author date and name.
* If we are revert, or if our cherry-pick results in a hand merge,
* we had better say that the current user is responsible for that.
*/
if (!no_commit) {
/* 6 is max possible length of our args array including NULL */
const char *args[6];
int i = 0;
args[i++] = "commit";
args[i++] = "-n";
if (signoff)
args[i++] = "-s";
if (!edit) {
args[i++] = "-F";
args[i++] = defmsg;
}
args[i] = NULL;
return execv_git_cmd(args);
}
free(reencoded_message);
return 0;
}
