#include "rerere.h"
#include "merge-recursive.h"
#include "refs.h"
+#include "argv-array.h"
#define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
-void remove_sequencer_state(void)
+const char sign_off_header[] = "Signed-off-by: ";
+static const char cherry_picked_prefix[] = "(cherry picked from commit ";
+
+static int is_rfc2822_line(const char *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++) {
+ int ch = buf[i];
+ if (ch == ':')
+ return 1;
+ if (!isalnum(ch) && ch != '-')
+ break;
+ }
+
+ return 0;
+}
+
+static int is_cherry_picked_from_line(const char *buf, int len)
+{
+ /*
+ * We only care that it looks roughly like (cherry picked from ...)
+ */
+ return len > strlen(cherry_picked_prefix) + 1 &&
+ !prefixcmp(buf, cherry_picked_prefix) && buf[len - 1] == ')';
+}
+
+/*
+ * Returns 0 for non-conforming footer
+ * Returns 1 for conforming footer
+ * Returns 2 when sob exists within conforming footer
+ * Returns 3 when sob exists within conforming footer as last entry
+ */
+static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob,
+ int ignore_footer)
+{
+ char prev;
+ int i, k;
+ int len = sb->len - ignore_footer;
+ const char *buf = sb->buf;
+ int found_sob = 0;
+
+ /* footer must end with newline */
+ if (!len || buf[len - 1] != '\n')
+ return 0;
+
+ prev = '\0';
+ for (i = len - 1; i > 0; i--) {
+ char ch = buf[i];
+ if (prev == '\n' && ch == '\n') /* paragraph break */
+ break;
+ prev = ch;
+ }
+
+ /* require at least one blank line */
+ if (prev != '\n' || buf[i] != '\n')
+ return 0;
+
+ /* advance to start of last paragraph */
+ while (i < len - 1 && buf[i] == '\n')
+ i++;
+
+ for (; i < len; i = k) {
+ int found_rfc2822;
+
+ for (k = i; k < len && buf[k] != '\n'; k++)
+ ; /* do nothing */
+ k++;
+
+ found_rfc2822 = is_rfc2822_line(buf + i, k - i - 1);
+ if (found_rfc2822 && sob &&
+ !strncmp(buf + i, sob->buf, sob->len))
+ found_sob = k;
+
+ if (!(found_rfc2822 ||
+ is_cherry_picked_from_line(buf + i, k - i - 1)))
+ return 0;
+ }
+ if (found_sob == i)
+ return 3;
+ if (found_sob)
+ return 2;
+ return 1;
+}
+
+static void remove_sequencer_state(void)
{
struct strbuf seq_dir = STRBUF_INIT;
out->reencoded_message = NULL;
out->message = commit->buffer;
- if (strcmp(encoding, git_commit_encoding))
+ if (same_encoding(encoding, git_commit_encoding))
out->reencoded_message = reencode_string(commit->buffer,
git_commit_encoding, encoding);
if (out->reencoded_message)
if (msg) {
fprintf(stderr, "%s\n", msg);
/*
- * A conflict has occured but the porcelain
+ * A conflict has occurred but the porcelain
* (typically rebase --interactive) wants to take care
* of the commit itself so remove CHERRY_PICK_HEAD
*/
static struct tree *empty_tree(void)
{
- return lookup_tree((const unsigned char *)EMPTY_TREE_SHA1_BIN);
+ return lookup_tree(EMPTY_TREE_SHA1_BIN);
}
static int error_dirty_index(struct replay_opts *opts)
return -1;
}
-static int fast_forward_to(const unsigned char *to, const unsigned char *from)
+static int fast_forward_to(const unsigned char *to, const unsigned char *from,
+ int unborn)
{
struct ref_lock *ref_lock;
read_cache();
- if (checkout_fast_forward(from, to))
+ if (checkout_fast_forward(from, to, 1))
exit(1); /* the callee should have complained already */
- ref_lock = lock_any_ref_for_update("HEAD", from, 0);
+ ref_lock = lock_any_ref_for_update("HEAD", unborn ? null_sha1 : from, 0);
return write_ref_sha1(ref_lock, to, "cherry-pick");
}
die(_("%s: Unable to write new index file"), action_name(opts));
rollback_lock_file(&index_lock);
+ if (opts->signoff)
+ append_signoff(msgbuf, 0, 0);
+
if (!clean) {
int i;
- strbuf_addstr(msgbuf, "\nConflicts:\n\n");
+ strbuf_addstr(msgbuf, "\nConflicts:\n");
for (i = 0; i < active_nr;) {
struct cache_entry *ce = active_cache[i++];
if (ce_stage(ce)) {
return !clean;
}
+static int is_index_unchanged(void)
+{
+ unsigned char head_sha1[20];
+ struct commit *head_commit;
+
+ if (!resolve_ref_unsafe("HEAD", head_sha1, 1, NULL))
+ return error(_("Could not resolve HEAD commit\n"));
+
+ head_commit = lookup_commit(head_sha1);
+
+ /*
+ * If head_commit is NULL, check_commit, called from
+ * lookup_commit, would have indicated that head_commit is not
+ * a commit object already. parse_commit() will return failure
+ * without further complaints in such a case. Otherwise, if
+ * the commit is invalid, parse_commit() will complain. So
+ * there is nothing for us to say here. Just return failure.
+ */
+ if (parse_commit(head_commit))
+ return -1;
+
+ if (!active_cache_tree)
+ active_cache_tree = cache_tree();
+
+ if (!cache_tree_fully_valid(active_cache_tree))
+ if (cache_tree_update(active_cache_tree, active_cache,
+ active_nr, 0))
+ return error(_("Unable to update cache tree\n"));
+
+ return !hashcmp(active_cache_tree->sha1, head_commit->tree->object.sha1);
+}
+
/*
* If we are cherry-pick, and if the merge did not result in
* hand-editing, we will hit this commit and inherit the original
* 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.
*/
-static int run_git_commit(const char *defmsg, struct replay_opts *opts)
+static int run_git_commit(const char *defmsg, struct replay_opts *opts,
+ int allow_empty)
{
- /* 7 is max possible length of our args array including NULL */
- const char *args[7];
- int i = 0;
+ struct argv_array array;
+ int rc;
+
+ argv_array_init(&array);
+ argv_array_push(&array, "commit");
+ argv_array_push(&array, "-n");
- args[i++] = "commit";
- args[i++] = "-n";
if (opts->signoff)
- args[i++] = "-s";
+ argv_array_push(&array, "-s");
if (!opts->edit) {
- args[i++] = "-F";
- args[i++] = defmsg;
+ argv_array_push(&array, "-F");
+ argv_array_push(&array, defmsg);
}
- if (opts->allow_empty)
- args[i++] = "--allow-empty";
- args[i] = NULL;
+ if (allow_empty)
+ argv_array_push(&array, "--allow-empty");
+
+ if (opts->allow_empty_message)
+ argv_array_push(&array, "--allow-empty-message");
+
+ rc = run_command_v_opt(array.argv, RUN_GIT_CMD);
+ argv_array_clear(&array);
+ return rc;
+}
+
+static int is_original_commit_empty(struct commit *commit)
+{
+ const unsigned char *ptree_sha1;
+
+ if (parse_commit(commit))
+ return error(_("Could not parse commit %s\n"),
+ sha1_to_hex(commit->object.sha1));
+ if (commit->parents) {
+ struct commit *parent = commit->parents->item;
+ if (parse_commit(parent))
+ return error(_("Could not parse parent commit %s\n"),
+ sha1_to_hex(parent->object.sha1));
+ ptree_sha1 = parent->tree->object.sha1;
+ } else {
+ ptree_sha1 = EMPTY_TREE_SHA1_BIN; /* commit is root */
+ }
+
+ return !hashcmp(ptree_sha1, commit->tree->object.sha1);
+}
+
+/*
+ * Do we run "git commit" with "--allow-empty"?
+ */
+static int allow_empty(struct replay_opts *opts, struct commit *commit)
+{
+ int index_unchanged, empty_commit;
- return run_command_v_opt(args, RUN_GIT_CMD);
+ /*
+ * Three cases:
+ *
+ * (1) we do not allow empty at all and error out.
+ *
+ * (2) we allow ones that were initially empty, but
+ * forbid the ones that become empty;
+ *
+ * (3) we allow both.
+ */
+ if (!opts->allow_empty)
+ return 0; /* let "git commit" barf as necessary */
+
+ index_unchanged = is_index_unchanged();
+ if (index_unchanged < 0)
+ return index_unchanged;
+ if (!index_unchanged)
+ return 0; /* we do not have to say --allow-empty */
+
+ if (opts->keep_redundant_commits)
+ return 1;
+
+ empty_commit = is_original_commit_empty(commit);
+ if (empty_commit < 0)
+ return empty_commit;
+ if (!empty_commit)
+ return 0;
+ else
+ return 1;
}
static int do_pick_commit(struct commit *commit, struct replay_opts *opts)
struct commit_message msg = { NULL, NULL, NULL, NULL, NULL };
char *defmsg = NULL;
struct strbuf msgbuf = STRBUF_INIT;
- int res;
+ int res, unborn = 0;
if (opts->no_commit) {
/*
if (write_cache_as_tree(head, 0, NULL))
die (_("Your index file is unmerged."));
} else {
- if (get_sha1("HEAD", head))
- return error(_("You do not have a valid HEAD"));
- if (index_differs_from("HEAD", 0))
+ unborn = get_sha1("HEAD", head);
+ if (unborn)
+ hashcpy(head, EMPTY_TREE_SHA1_BIN);
+ if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0))
return error_dirty_index(opts);
}
discard_cache();
else
parent = commit->parents->item;
- if (opts->allow_ff && parent && !hashcmp(parent->object.sha1, head))
- return fast_forward_to(commit->object.sha1, head);
+ if (opts->allow_ff &&
+ ((parent && !hashcmp(parent->object.sha1, head)) ||
+ (!parent && unborn)))
+ return fast_forward_to(commit->object.sha1, head, unborn);
if (parent && parse_commit(parent) < 0)
/* TRANSLATORS: The first %s will be "revert" or
}
if (opts->record_origin) {
- strbuf_addstr(&msgbuf, "(cherry picked from commit ");
+ if (!has_conforming_footer(&msgbuf, NULL, 0))
+ strbuf_addch(&msgbuf, '\n');
+ strbuf_addstr(&msgbuf, cherry_picked_prefix);
strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
strbuf_addstr(&msgbuf, ")\n");
}
print_advice(res == 1, opts);
rerere(opts->allow_rerere_auto);
} else {
+ int allow = allow_empty(opts, commit);
+ if (allow < 0)
+ return allow;
if (!opts->no_commit)
- res = run_git_commit(defmsg, opts);
+ res = run_git_commit(defmsg, opts, allow);
}
free_message(&msg);
static void prepare_revs(struct replay_opts *opts)
{
- if (opts->action != REPLAY_REVERT)
+ /*
+ * picking (but not reverting) ranges (but not individual revisions)
+ * should be done in reverse
+ */
+ if (opts->action == REPLAY_PICK && !opts->revs->no_walk)
opts->revs->reverse ^= 1;
if (prepare_revision_walk(opts->revs))
rollback_lock_file(&index_lock);
}
-/*
- * Append a commit to the end of the commit_list.
- *
- * next starts by pointing to the variable that holds the head of an
- * empty commit_list, and is updated to point to the "next" field of
- * the last item on the list as new commits are appended.
- *
- * Usage example:
- *
- * struct commit_list *list;
- * struct commit_list **next = &list;
- *
- * next = commit_list_append(c1, next);
- * next = commit_list_append(c2, next);
- * assert(commit_list_count(list) == 2);
- * return list;
- */
-static struct commit_list **commit_list_append(struct commit *commit,
- struct commit_list **next)
-{
- struct commit_list *new = xmalloc(sizeof(struct commit_list));
- new->item = commit;
- *next = new;
- new->next = NULL;
- return &new->next;
-}
-
static int format_todo(struct strbuf *buf, struct commit_list *todo_list,
struct replay_opts *opts)
{
{
struct commit_list *todo_list = NULL;
unsigned char sha1[20];
+ int i;
if (opts->subcommand == REPLAY_NONE)
assert(opts->revs);
if (opts->subcommand == REPLAY_CONTINUE)
return sequencer_continue(opts);
+ for (i = 0; i < opts->revs->pending.nr; i++) {
+ unsigned char sha1[20];
+ const char *name = opts->revs->pending.objects[i].name;
+
+ /* This happens when using --stdin. */
+ if (!strlen(name))
+ continue;
+
+ if (!get_sha1(name, sha1)) {
+ if (!lookup_commit_reference_gently(sha1, 1)) {
+ enum object_type type = sha1_object_info(sha1, NULL);
+ die(_("%s: can't cherry-pick a %s"), name, typename(type));
+ }
+ } else
+ die(_("%s: bad revision"), name);
+ }
+
/*
* If we were called as "git cherry-pick <commit>", just
* cherry-pick/revert it, set CHERRY_PICK_HEAD /
save_opts(opts);
return pick_commits(todo_list, opts);
}
+
+void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag)
+{
+ unsigned no_dup_sob = flag & APPEND_SIGNOFF_DEDUP;
+ struct strbuf sob = STRBUF_INIT;
+ int has_footer;
+
+ strbuf_addstr(&sob, sign_off_header);
+ strbuf_addstr(&sob, fmt_name(getenv("GIT_COMMITTER_NAME"),
+ getenv("GIT_COMMITTER_EMAIL")));
+ strbuf_addch(&sob, '\n');
+
+ /*
+ * If the whole message buffer is equal to the sob, pretend that we
+ * found a conforming footer with a matching sob
+ */
+ if (msgbuf->len - ignore_footer == sob.len &&
+ !strncmp(msgbuf->buf, sob.buf, sob.len))
+ has_footer = 3;
+ else
+ has_footer = has_conforming_footer(msgbuf, &sob, ignore_footer);
+
+ if (!has_footer) {
+ const char *append_newlines = NULL;
+ size_t len = msgbuf->len - ignore_footer;
+
+ if (!len) {
+ /*
+ * The buffer is completely empty. Leave foom for
+ * the title and body to be filled in by the user.
+ */
+ append_newlines = "\n\n";
+ } else if (msgbuf->buf[len - 1] != '\n') {
+ /*
+ * Incomplete line. Complete the line and add a
+ * blank one so that there is an empty line between
+ * the message body and the sob.
+ */
+ append_newlines = "\n\n";
+ } else if (len == 1) {
+ /*
+ * Buffer contains a single newline. Add another
+ * so that we leave room for the title and body.
+ */
+ append_newlines = "\n";
+ } else if (msgbuf->buf[len - 2] != '\n') {
+ /*
+ * Buffer ends with a single newline. Add another
+ * so that there is an empty line between the message
+ * body and the sob.
+ */
+ append_newlines = "\n";
+ } /* else, the buffer already ends with two newlines. */
+
+ if (append_newlines)
+ strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0,
+ append_newlines, strlen(append_newlines));
+ }
+
+ if (has_footer != 3 && (!no_dup_sob || has_footer != 2))
+ strbuf_splice(msgbuf, msgbuf->len - ignore_footer, 0,
+ sob.buf, sob.len);
+
+ strbuf_release(&sob);
+}