static int reset_refs(const char *rev, const unsigned char *sha1)
{
int update_ref_status;
struct strbuf msg = STRBUF_INIT;
struct strbuf err = STRBUF_INIT;
unsigned char *orig = NULL, sha1_orig[20],
*old_orig = NULL, sha1_old_orig[20];
if (!get_sha1("ORIG_HEAD", sha1_old_orig))
old_orig = sha1_old_orig;
if (!get_sha1("HEAD", sha1_orig)) {
orig = sha1_orig;
set_reflog_message(&msg, "updating ORIG_HEAD", NULL);
if (update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, &err))
error("%s", err.buf);
strbuf_release(&err);
} else if (old_orig)
delete_ref("ORIG_HEAD", old_orig, 0);
set_reflog_message(&msg, "updating HEAD", rev);
update_ref_status = update_ref(msg.buf, "HEAD", sha1, orig, 0, &err);
if (update_ref_status)
error("%s", err.buf);
strbuf_release(&err);
strbuf_release(&msg);
return update_ref_status;
}
static int reset_refs(const char *rev, const struct object_id *oid)
{
int update_ref_status;
struct strbuf msg = STRBUF_INIT;
struct object_id *orig = NULL, oid_orig,
*old_orig = NULL, oid_old_orig;
if (!get_oid("ORIG_HEAD", &oid_old_orig))
old_orig = &oid_old_orig;
if (!get_oid("HEAD", &oid_orig)) {
orig = &oid_orig;
set_reflog_message(&msg, "updating ORIG_HEAD", NULL);
update_ref_oid(msg.buf, "ORIG_HEAD", orig, old_orig, 0,
UPDATE_REFS_MSG_ON_ERR);
} else if (old_orig)
delete_ref("ORIG_HEAD", old_orig->hash, 0);
set_reflog_message(&msg, "updating HEAD", rev);
update_ref_status = update_ref_oid(msg.buf, "HEAD", oid, orig, 0,
UPDATE_REFS_MSG_ON_ERR);
strbuf_release(&msg);
return update_ref_status;
}
int cmd_pull(int argc, const char **argv, const char *prefix)
{
const char *repo, **refspecs;
struct oid_array merge_heads = OID_ARRAY_INIT;
struct object_id orig_head, curr_head;
struct object_id rebase_fork_point;
int autostash;
if (!getenv("GIT_REFLOG_ACTION"))
set_reflog_message(argc, argv);
git_config(git_pull_config, NULL);
argc = parse_options(argc, argv, prefix, pull_options, pull_usage, 0);
parse_repo_refspecs(argc, argv, &repo, &refspecs);
if (!opt_ff)
opt_ff = xstrdup_or_null(config_get_ff());
if (opt_rebase < 0)
opt_rebase = config_get_rebase();
if (read_cache_unmerged())
die_resolve_conflict("pull");
if (file_exists(git_path_merge_head(the_repository)))
die_conclude_merge();
if (get_oid("HEAD", &orig_head))
oidclr(&orig_head);
if (!opt_rebase && opt_autostash != -1)
die(_("--[no-]autostash option is only valid with --rebase."));
autostash = config_autostash;
if (opt_rebase) {
if (opt_autostash != -1)
autostash = opt_autostash;
if (is_null_oid(&orig_head) && !is_cache_unborn())
die(_("Updating an unborn branch with changes added to the index."));
if (!autostash)
require_clean_work_tree(N_("pull with rebase"),
_("please commit or stash them."), 1, 0);
if (get_rebase_fork_point(&rebase_fork_point, repo, *refspecs))
oidclr(&rebase_fork_point);
}
if (run_fetch(repo, refspecs))
return 1;
if (opt_dry_run)
return 0;
if (get_oid("HEAD", &curr_head))
oidclr(&curr_head);
if (!is_null_oid(&orig_head) && !is_null_oid(&curr_head) &&
!oideq(&orig_head, &curr_head)) {
/*
* The fetch involved updating the current branch.
*
* The working tree and the index file are still based on
* orig_head commit, but we are merging into curr_head.
* Update the working tree to match curr_head.
*/
warning(_("fetch updated the current branch head.\n"
"fast-forwarding your working tree from\n"
"commit %s."), oid_to_hex(&orig_head));
if (checkout_fast_forward(&orig_head, &curr_head, 0))
die(_("Cannot fast-forward your working tree.\n"
"After making sure that you saved anything precious from\n"
"$ git diff %s\n"
"output, run\n"
"$ git reset --hard\n"
"to recover."), oid_to_hex(&orig_head));
}
get_merge_heads(&merge_heads);
if (!merge_heads.nr)
die_no_merge_candidates(repo, refspecs);
if (is_null_oid(&orig_head)) {
if (merge_heads.nr > 1)
die(_("Cannot merge multiple branches into empty head."));
return pull_into_void(merge_heads.oid, &curr_head);
}
if (opt_rebase && merge_heads.nr > 1)
die(_("Cannot rebase onto multiple branches."));
if (opt_rebase) {
int ret = 0;
if ((recurse_submodules == RECURSE_SUBMODULES_ON ||
recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) &&
submodule_touches_in_range(&rebase_fork_point, &curr_head))
die(_("cannot rebase with locally recorded submodule modifications"));
if (!autostash) {
struct commit_list *list = NULL;
struct commit *merge_head, *head;
head = lookup_commit_reference(the_repository,
&orig_head);
commit_list_insert(head, &list);
merge_head = lookup_commit_reference(the_repository,
&merge_heads.oid[0]);
if (is_descendant_of(merge_head, list)) {
/* we can fast-forward this without invoking rebase */
opt_ff = "--ff-only";
ret = run_merge();
}
}
ret = run_rebase(&curr_head, merge_heads.oid, &rebase_fork_point);
if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON ||
recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND))
ret = rebase_submodules();
return ret;
} else {
int ret = run_merge();
if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON ||
recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND))
ret = update_submodules();
return ret;
}
}
int cmd_pull(int argc, const char **argv, const char *prefix)
{
const char *repo, **refspecs;
struct sha1_array merge_heads = SHA1_ARRAY_INIT;
unsigned char orig_head[GIT_SHA1_RAWSZ], curr_head[GIT_SHA1_RAWSZ];
unsigned char rebase_fork_point[GIT_SHA1_RAWSZ];
if (!getenv("GIT_REFLOG_ACTION"))
set_reflog_message(argc, argv);
argc = parse_options(argc, argv, prefix, pull_options, pull_usage, 0);
parse_repo_refspecs(argc, argv, &repo, &refspecs);
if (!opt_ff)
opt_ff = xstrdup_or_null(config_get_ff());
if (opt_rebase < 0)
opt_rebase = config_get_rebase();
git_config(git_pull_config, NULL);
if (read_cache_unmerged())
die_resolve_conflict("Pull");
if (file_exists(git_path("MERGE_HEAD")))
die_conclude_merge();
if (get_sha1("HEAD", orig_head))
hashclr(orig_head);
if (!opt_rebase && opt_autostash != -1)
die(_("--[no-]autostash option is only valid with --rebase."));
if (opt_rebase) {
int autostash = config_autostash;
if (opt_autostash != -1)
autostash = opt_autostash;
if (is_null_sha1(orig_head) && !is_cache_unborn())
die(_("Updating an unborn branch with changes added to the index."));
if (!autostash)
die_on_unclean_work_tree(prefix);
if (get_rebase_fork_point(rebase_fork_point, repo, *refspecs))
hashclr(rebase_fork_point);
}
if (run_fetch(repo, refspecs))
return 1;
if (opt_dry_run)
return 0;
if (get_sha1("HEAD", curr_head))
hashclr(curr_head);
if (!is_null_sha1(orig_head) && !is_null_sha1(curr_head) &&
hashcmp(orig_head, curr_head)) {
/*
* The fetch involved updating the current branch.
*
* The working tree and the index file are still based on
* orig_head commit, but we are merging into curr_head.
* Update the working tree to match curr_head.
*/
warning(_("fetch updated the current branch head.\n"
"fast-forwarding your working tree from\n"
"commit %s."), sha1_to_hex(orig_head));
if (checkout_fast_forward(orig_head, curr_head, 0))
die(_("Cannot fast-forward your working tree.\n"
"After making sure that you saved anything precious from\n"
"$ git diff %s\n"
"output, run\n"
"$ git reset --hard\n"
"to recover."), sha1_to_hex(orig_head));
}
get_merge_heads(&merge_heads);
if (!merge_heads.nr)
die_no_merge_candidates(repo, refspecs);
if (is_null_sha1(orig_head)) {
if (merge_heads.nr > 1)
die(_("Cannot merge multiple branches into empty head."));
return pull_into_void(*merge_heads.sha1, curr_head);
} else if (opt_rebase) {
if (merge_heads.nr > 1)
die(_("Cannot rebase onto multiple branches."));
return run_rebase(curr_head, *merge_heads.sha1, rebase_fork_point);
} else
return run_merge();
}
int cmd_reset(int argc, const char **argv, const char *prefix)
{
int i = 0, reset_type = NONE, update_ref_status = 0, quiet = 0;
int patch_mode = 0;
const char *rev = "HEAD";
unsigned char sha1[20], *orig = NULL, sha1_orig[20],
*old_orig = NULL, sha1_old_orig[20];
struct commit *commit;
struct strbuf msg = STRBUF_INIT;
const struct option options[] = {
OPT__QUIET(&quiet, "be quiet, only report errors"),
OPT_SET_INT(0, "mixed", &reset_type,
"reset HEAD and index", MIXED),
OPT_SET_INT(0, "soft", &reset_type, "reset only HEAD", SOFT),
OPT_SET_INT(0, "hard", &reset_type,
"reset HEAD, index and working tree", HARD),
OPT_SET_INT(0, "merge", &reset_type,
"reset HEAD, index and working tree", MERGE),
OPT_SET_INT(0, "keep", &reset_type,
"reset HEAD but keep local changes", KEEP),
OPT_BOOLEAN('p', "patch", &patch_mode, "select hunks interactively"),
OPT_END()
};
git_config(git_default_config, NULL);
argc = parse_options(argc, argv, prefix, options, git_reset_usage,
PARSE_OPT_KEEP_DASHDASH);
/*
* Possible arguments are:
*
* git reset [-opts] <rev> <paths>...
* git reset [-opts] <rev> -- <paths>...
* git reset [-opts] -- <paths>...
* git reset [-opts] <paths>...
*
* At this point, argv[i] points immediately after [-opts].
*/
if (i < argc) {
if (!strcmp(argv[i], "--")) {
i++; /* reset to HEAD, possibly with paths */
} else if (i + 1 < argc && !strcmp(argv[i+1], "--")) {
rev = argv[i];
i += 2;
}
/*
* Otherwise, argv[i] could be either <rev> or <paths> and
* has to be unambiguous.
*/
else if (!get_sha1(argv[i], sha1)) {
/*
* Ok, argv[i] looks like a rev; it should not
* be a filename.
*/
verify_non_filename(prefix, argv[i]);
rev = argv[i++];
} else {
/* Otherwise we treat this as a filename */
verify_filename(prefix, argv[i]);
}
}
if (get_sha1(rev, sha1))
die(_("Failed to resolve '%s' as a valid ref."), rev);
commit = lookup_commit_reference(sha1);
if (!commit)
die(_("Could not parse object '%s'."), rev);
hashcpy(sha1, commit->object.sha1);
if (patch_mode) {
if (reset_type != NONE)
die(_("--patch is incompatible with --{hard,mixed,soft}"));
return interactive_reset(rev, argv + i, prefix);
}
/* git reset tree [--] paths... can be used to
* load chosen paths from the tree into the index without
* affecting the working tree nor HEAD. */
if (i < argc) {
if (reset_type == MIXED)
warning(_("--mixed with paths is deprecated; use 'git reset -- <paths>' instead."));
else if (reset_type != NONE)
die(_("Cannot do %s reset with paths."),
_(reset_type_names[reset_type]));
return read_from_tree(prefix, argv + i, sha1,
quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN);
}
if (reset_type == NONE)
reset_type = MIXED; /* by default */
if (reset_type != SOFT && reset_type != MIXED)
setup_work_tree();
if (reset_type == MIXED && is_bare_repository())
die(_("%s reset is not allowed in a bare repository"),
_(reset_type_names[reset_type]));
/* Soft reset does not touch the index file nor the working tree
* at all, but requires them in a good order. Other resets reset
* the index file to the tree object we are switching to. */
if (reset_type == SOFT)
die_if_unmerged_cache(reset_type);
else {
int err;
if (reset_type == KEEP)
die_if_unmerged_cache(reset_type);
err = reset_index_file(sha1, reset_type, quiet);
if (reset_type == KEEP)
err = err || reset_index_file(sha1, MIXED, quiet);
if (err)
die(_("Could not reset index file to revision '%s'."), rev);
}
/* Any resets update HEAD to the head being switched to,
* saving the previous head in ORIG_HEAD before. */
if (!get_sha1("ORIG_HEAD", sha1_old_orig))
old_orig = sha1_old_orig;
if (!get_sha1("HEAD", sha1_orig)) {
orig = sha1_orig;
set_reflog_message(&msg, "updating ORIG_HEAD", NULL);
update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR);
}
else if (old_orig)
delete_ref("ORIG_HEAD", old_orig, 0);
set_reflog_message(&msg, "updating HEAD", rev);
update_ref_status = update_ref(msg.buf, "HEAD", sha1, orig, 0, MSG_ON_ERR);
switch (reset_type) {
case HARD:
if (!update_ref_status && !quiet)
print_new_head_line(commit);
break;
case SOFT: /* Nothing else to do. */
break;
case MIXED: /* Report what has not been updated. */
update_index_refresh(0, NULL,
quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN);
break;
}
remove_branch_state();
strbuf_release(&msg);
return update_ref_status;
}
