/*
* The merge_rr list is meant to hold outstanding conflicted paths
* that rerere could handle. Abuse the list by adding other types of
* entries to allow the caller to show "rerere remaining".
*
* - Conflicted paths that rerere does not handle are added
* - Conflicted paths that have been resolved are marked as such
* by storing RERERE_RESOLVED to .util field (where conflict ID
* is expected to be stored).
*
* Do *not* write MERGE_RR file out after calling this function.
*
* NEEDSWORK: we may want to fix the caller that implements "rerere
* remaining" to do this without abusing merge_rr.
*/
int rerere_remaining(struct string_list *merge_rr)
{
int i;
if (setup_rerere(merge_rr, RERERE_READONLY))
return 0;
if (read_cache() < 0)
return error(_("index file corrupt"));
for (i = 0; i < active_nr;) {
int conflict_type;
const struct cache_entry *e = active_cache[i];
i = check_one_conflict(i, &conflict_type);
if (conflict_type == PUNTED)
string_list_insert(merge_rr, (const char *)e->name);
else if (conflict_type == RESOLVED) {
struct string_list_item *it;
it = string_list_lookup(merge_rr, (const char *)e->name);
if (it != NULL) {
free_rerere_id(it);
it->util = RERERE_RESOLVED;
}
}
}
return 0;
}
int rerere_forget(struct pathspec *pathspec)
{
int i, fd;
struct string_list conflict = STRING_LIST_INIT_DUP;
struct string_list merge_rr = STRING_LIST_INIT_DUP;
if (read_cache() < 0)
return error(_("index file corrupt"));
fd = setup_rerere(&merge_rr, RERERE_NOAUTOUPDATE);
if (fd < 0)
return 0;
/*
* The paths may have been resolved (incorrectly);
* recover the original conflicted state and then
* find the conflicted paths.
*/
unmerge_cache(pathspec);
find_conflict(&conflict);
for (i = 0; i < conflict.nr; i++) {
struct string_list_item *it = &conflict.items[i];
if (!match_pathspec(&the_index, pathspec, it->string,
strlen(it->string), 0, NULL, 0))
continue;
rerere_forget_one_path(it->string, &merge_rr);
}
return write_rr(&merge_rr, fd);
}
int rerere(int flags)
{
struct string_list merge_rr = STRING_LIST_INIT_DUP;
int fd;
fd = setup_rerere(&merge_rr, flags);
if (fd < 0)
return 0;
return do_plain_rerere(&merge_rr, fd);
}
int rerere(void)
{
struct string_list merge_rr = { NULL, 0, 0, 1 };
int fd;
fd = setup_rerere(&merge_rr);
if (fd < 0)
return 0;
return do_plain_rerere(&merge_rr, fd);
}
/*
* The main entry point that is called internally from codepaths that
* perform mergy operations, possibly leaving conflicted index entries
* and working tree files.
*/
int rerere(int flags)
{
struct string_list merge_rr = STRING_LIST_INIT_DUP;
int fd, status;
fd = setup_rerere(&merge_rr, flags);
if (fd < 0)
return 0;
status = do_plain_rerere(&merge_rr, fd);
free_rerere_dirs();
return status;
}
void rerere_gc(struct string_list *rr)
{
struct string_list to_remove = STRING_LIST_INIT_DUP;
DIR *dir;
struct dirent *e;
int i;
timestamp_t now = time(NULL);
timestamp_t cutoff_noresolve = now - 15 * 86400;
timestamp_t cutoff_resolve = now - 60 * 86400;
if (setup_rerere(rr, 0) < 0)
return;
git_config_get_expiry_in_days("gc.rerereresolved", &cutoff_resolve, now);
git_config_get_expiry_in_days("gc.rerereunresolved", &cutoff_noresolve, now);
git_config(git_default_config, NULL);
dir = opendir(git_path("rr-cache"));
if (!dir)
die_errno(_("unable to open rr-cache directory"));
/* Collect stale conflict IDs ... */
while ((e = readdir(dir))) {
struct rerere_dir *rr_dir;
struct rerere_id id;
int now_empty;
if (is_dot_or_dotdot(e->d_name))
continue;
rr_dir = find_rerere_dir(e->d_name);
if (!rr_dir)
continue; /* or should we remove e->d_name? */
now_empty = 1;
for (id.variant = 0, id.collection = rr_dir;
id.variant < id.collection->status_nr;
id.variant++) {
prune_one(&id, cutoff_resolve, cutoff_noresolve);
if (id.collection->status[id.variant])
now_empty = 0;
}
if (now_empty)
string_list_append(&to_remove, e->d_name);
}
closedir(dir);
/* ... and then remove the empty directories */
for (i = 0; i < to_remove.nr; i++)
rmdir(git_path("rr-cache/%s", to_remove.items[i].string));
string_list_clear(&to_remove, 0);
rollback_lock_file(&write_lock);
}
/*
* During a conflict resolution, after "rerere" recorded the
* preimages, abandon them if the user did not resolve them or
* record their resolutions. And drop $GIT_DIR/MERGE_RR.
*
* NEEDSWORK: shouldn't we be calling this from "reset --hard"?
*/
void rerere_clear(struct string_list *merge_rr)
{
int i;
if (setup_rerere(merge_rr, 0) < 0)
return;
for (i = 0; i < merge_rr->nr; i++) {
struct rerere_id *id = merge_rr->items[i].util;
if (!has_rerere_resolution(id))
unlink_rr_item(id);
}
unlink_or_warn(git_path_merge_rr());
rollback_lock_file(&write_lock);
}
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;
}
void rerere_gc(struct string_list *rr)
{
struct string_list to_remove = STRING_LIST_INIT_DUP;
DIR *dir;
struct dirent *e;
int i, cutoff;
time_t now = time(NULL), then;
int cutoff_noresolve = 15;
int cutoff_resolve = 60;
if (setup_rerere(rr, 0) < 0)
return;
git_config_get_int("gc.rerereresolved", &cutoff_resolve);
git_config_get_int("gc.rerereunresolved", &cutoff_noresolve);
git_config(git_default_config, NULL);
dir = opendir(git_path("rr-cache"));
if (!dir)
die_errno("unable to open rr-cache directory");
/* Collect stale conflict IDs ... */
while ((e = readdir(dir))) {
if (is_dot_or_dotdot(e->d_name))
continue;
then = rerere_last_used_at(e->d_name);
if (then) {
cutoff = cutoff_resolve;
} else {
then = rerere_created_at(e->d_name);
if (!then)
continue;
cutoff = cutoff_noresolve;
}
if (then < now - cutoff * 86400)
string_list_append(&to_remove, e->d_name);
}
closedir(dir);
/* ... and then remove them one-by-one */
for (i = 0; i < to_remove.nr; i++)
unlink_rr_item(dirname_to_id(to_remove.items[i].string));
string_list_clear(&to_remove, 0);
rollback_lock_file(&write_lock);
}
int rerere_forget(struct pathspec *pathspec)
{
int i, fd;
struct string_list conflict = STRING_LIST_INIT_DUP;
struct string_list merge_rr = STRING_LIST_INIT_DUP;
if (read_cache() < 0)
return error("Could not read index");
fd = setup_rerere(&merge_rr, RERERE_NOAUTOUPDATE);
unmerge_cache(pathspec);
find_conflict(&conflict);
for (i = 0; i < conflict.nr; i++) {
struct string_list_item *it = &conflict.items[i];
if (!match_pathspec(pathspec, it->string,
strlen(it->string), 0, NULL, 0))
continue;
rerere_forget_one_path(it->string, &merge_rr);
}
return write_rr(&merge_rr, fd);
}
static int sequencer_skip(struct replay_opts *opts)
{
const char *argv[3]; /* reset --hard + NULL */
struct string_list merge_rr = STRING_LIST_INIT_DUP;
int ret;
if (setup_rerere(&merge_rr, 0) >= 0) {
rerere_clear(&merge_rr);
string_list_clear(&merge_rr, 1);
}
argv[0] = "reset";
argv[1] = "--hard";
argv[2] = NULL;
ret = run_command_v_opt(argv, RUN_GIT_CMD);
if (ret)
return ret;
discard_cache();
read_cache();
return sequencer_continue(opts, 1);
}
int cmd_rerere(int argc, const char **argv, const char *prefix)
{
struct string_list merge_rr = { NULL, 0, 0, 1 };
int i, fd;
if (argc < 2)
return rerere();
fd = setup_rerere(&merge_rr);
if (fd < 0)
return 0;
if (!strcmp(argv[1], "clear")) {
for (i = 0; i < merge_rr.nr; i++) {
const char *name = (const char *)merge_rr.items[i].util;
if (!has_resolution(name))
unlink_rr_item(name);
}
unlink(git_path("rr-cache/MERGE_RR"));
} else if (!strcmp(argv[1], "gc"))
garbage_collect(&merge_rr);
else if (!strcmp(argv[1], "status"))
for (i = 0; i < merge_rr.nr; i++)
printf("%s\n", merge_rr.items[i].string);
else if (!strcmp(argv[1], "diff"))
for (i = 0; i < merge_rr.nr; i++) {
const char *path = merge_rr.items[i].string;
const char *name = (const char *)merge_rr.items[i].util;
diff_two(rr_path(name, "preimage"), path, path, path);
}
else
usage(git_rerere_usage);
string_list_clear(&merge_rr, 1);
return 0;
}
int cmd_rerere(int argc, const char **argv, const char *prefix)
{
struct string_list merge_rr = STRING_LIST_INIT_DUP;
int i, fd, autoupdate = -1, flags = 0;
struct option options[] = {
OPT_SET_INT(0, "rerere-autoupdate", &autoupdate,
N_("register clean resolutions in index"), 1),
OPT_END(),
};
argc = parse_options(argc, argv, prefix, options, rerere_usage, 0);
git_config(git_xmerge_config, NULL);
if (autoupdate == 1)
flags = RERERE_AUTOUPDATE;
if (autoupdate == 0)
flags = RERERE_NOAUTOUPDATE;
if (argc < 1)
return rerere(flags);
if (!strcmp(argv[0], "forget")) {
struct pathspec pathspec;
if (argc < 2)
warning("'git rerere forget' without paths is deprecated");
parse_pathspec(&pathspec, 0, PATHSPEC_PREFER_CWD,
prefix, argv + 1);
return rerere_forget(&pathspec);
}
fd = setup_rerere(&merge_rr, flags);
if (fd < 0)
return 0;
if (!strcmp(argv[0], "clear")) {
rerere_clear(&merge_rr);
} else if (!strcmp(argv[0], "gc"))
rerere_gc(&merge_rr);
else if (!strcmp(argv[0], "status"))
for (i = 0; i < merge_rr.nr; i++)
printf("%s\n", merge_rr.items[i].string);
else if (!strcmp(argv[0], "remaining")) {
rerere_remaining(&merge_rr);
for (i = 0; i < merge_rr.nr; i++) {
if (merge_rr.items[i].util != RERERE_RESOLVED)
printf("%s\n", merge_rr.items[i].string);
else
/* prepare for later call to
* string_list_clear() */
merge_rr.items[i].util = NULL;
}
} else if (!strcmp(argv[0], "diff"))
for (i = 0; i < merge_rr.nr; i++) {
const char *path = merge_rr.items[i].string;
const char *name = (const char *)merge_rr.items[i].util;
diff_two(rerere_path(name, "preimage"), path, path, path);
}
else
usage_with_options(rerere_usage, options);
string_list_clear(&merge_rr, 1);
return 0;
}
