static int sequencer_rollback(struct replay_opts *opts)
{
const char *filename;
FILE *f;
unsigned char sha1[20];
struct strbuf buf = STRBUF_INIT;
struct string_list merge_rr = STRING_LIST_INIT_DUP;
if (setup_rerere(&merge_rr, 0) >= 0) {
rerere_clear(&merge_rr);
string_list_clear(&merge_rr, 1);
}
filename = git_path(SEQ_HEAD_FILE);
f = fopen(filename, "r");
if (!f && errno == ENOENT) {
/*
* There is no multiple-cherry-pick in progress.
* If CHERRY_PICK_HEAD or REVERT_HEAD indicates
* a single-cherry-pick in progress, abort that.
*/
return rollback_single_pick();
}
if (!f)
return error(_("cannot open %s: %s"), filename,
strerror(errno));
if (strbuf_getline(&buf, f, '\n')) {
error(_("cannot read %s: %s"), filename, ferror(f) ?
strerror(errno) : _("unexpected end of file"));
fclose(f);
goto fail;
}
fclose(f);
if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') {
error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"),
filename);
goto fail;
}
if (reset_for_rollback(sha1))
goto fail;
remove_sequencer_state();
strbuf_release(&buf);
return 0;
fail:
strbuf_release(&buf);
return -1;
}
int sequencer_rollback(struct replay_opts *opts)
{
FILE *f;
unsigned char sha1[20];
struct strbuf buf = STRBUF_INIT;
f = fopen(git_path_head_file(), "r");
if (!f && errno == ENOENT) {
/*
* There is no multiple-cherry-pick in progress.
* If CHERRY_PICK_HEAD or REVERT_HEAD indicates
* a single-cherry-pick in progress, abort that.
*/
return rollback_single_pick();
}
if (!f)
return error_errno(_("cannot open '%s'"), git_path_head_file());
if (strbuf_getline_lf(&buf, f)) {
error(_("cannot read '%s': %s"), git_path_head_file(),
ferror(f) ? strerror(errno) : _("unexpected end of file"));
fclose(f);
goto fail;
}
fclose(f);
if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') {
error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"),
git_path_head_file());
goto fail;
}
if (is_null_sha1(sha1)) {
error(_("cannot abort from a branch yet to be born"));
goto fail;
}
if (!rollback_is_safe()) {
/* Do not error, just do not rollback */
warning(_("You seem to have moved HEAD. "
"Not rewinding, check your HEAD!"));
} else
if (reset_for_rollback(sha1))
goto fail;
strbuf_release(&buf);
return sequencer_remove_state(opts);
fail:
strbuf_release(&buf);
return -1;
}