static void rename_branch(const char *oldname, const char *newname, int force)
{
struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
int recovery = 0;
int clobber_head_ok;
if (!oldname)
die(_("cannot rename the current branch while not on any."));
if (strbuf_check_branch_ref(&oldref, oldname)) {
/*
* Bad name --- this could be an attempt to rename a
* ref that we used to allow to be created by accident.
*/
if (ref_exists(oldref.buf))
recovery = 1;
else
die(_("Invalid branch name: '%s'"), oldname);
}
/*
* A command like "git branch -M currentbranch currentbranch" cannot
* cause the worktree to become inconsistent with HEAD, so allow it.
*/
clobber_head_ok = !strcmp(oldname, newname);
validate_new_branchname(newname, &newref, force, clobber_head_ok);
reject_rebase_or_bisect_branch(oldref.buf);
strbuf_addf(&logmsg, "Branch: renamed %s to %s",
oldref.buf, newref.buf);
if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
die(_("Branch rename failed"));
if (recovery)
warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
if (replace_each_worktree_head_symref(oldref.buf, newref.buf, logmsg.buf))
die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
strbuf_release(&logmsg);
strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
strbuf_release(&oldref);
strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
strbuf_release(&newref);
if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
die(_("Branch is renamed, but update of config-file failed"));
strbuf_release(&oldsection);
strbuf_release(&newsection);
}
static void rename_branch(const char *oldname, const char *newname, int force)
{
struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
unsigned char sha1[20];
struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
int recovery = 0;
if (!oldname)
die(_("cannot rename the current branch while not on any."));
if (strbuf_check_branch_ref(&oldref, oldname)) {
/*
* Bad name --- this could be an attempt to rename a
* ref that we used to allow to be created by accident.
*/
if (resolve_ref(oldref.buf, sha1, 1, NULL))
recovery = 1;
else
die(_("Invalid branch name: '%s'"), oldname);
}
validate_new_branchname(newname, &newref, force, 0);
strbuf_addf(&logmsg, "Branch: renamed %s to %s",
oldref.buf, newref.buf);
if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
die(_("Branch rename failed"));
strbuf_release(&logmsg);
if (recovery)
warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
/* no need to pass logmsg here as HEAD didn't really move */
if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
strbuf_release(&oldref);
strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
strbuf_release(&newref);
if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
die(_("Branch is renamed, but update of config-file failed"));
strbuf_release(&oldsection);
strbuf_release(&newsection);
}
void create_branch(const char *head,
const char *name, const char *start_name,
int force, int reflog, int clobber_head,
int quiet, enum branch_track track)
{
struct ref_lock *lock = NULL;
struct commit *commit;
unsigned char sha1[20];
char *real_ref, msg[PATH_MAX + 20];
struct strbuf ref = STRBUF_INIT;
int forcing = 0;
int dont_change_ref = 0;
int explicit_tracking = 0;
if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE)
explicit_tracking = 1;
if (validate_new_branchname(name, &ref, force,
track == BRANCH_TRACK_OVERRIDE ||
clobber_head)) {
if (!force)
dont_change_ref = 1;
else
forcing = 1;
}
real_ref = NULL;
if (get_sha1(start_name, sha1)) {
if (explicit_tracking) {
if (advice_set_upstream_failure) {
error(_(upstream_missing), start_name);
advise(_(upstream_advice));
exit(1);
}
die(_(upstream_missing), start_name);
}
die(_("Not a valid object name: '%s'."), start_name);
}
switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
case 0:
/* Not branching from any existing branch */
if (explicit_tracking)
die(_(upstream_not_branch), start_name);
break;
case 1:
/* Unique completion -- good, only if it is a real branch */
if (!starts_with(real_ref, "refs/heads/") &&
validate_remote_tracking_branch(real_ref)) {
if (explicit_tracking)
die(_(upstream_not_branch), start_name);
else
real_ref = NULL;
}
break;
default:
die(_("Ambiguous object name: '%s'."), start_name);
break;
}
if ((commit = lookup_commit_reference(sha1)) == NULL)
die(_("Not a valid branch point: '%s'."), start_name);
hashcpy(sha1, commit->object.sha1);
if (!dont_change_ref) {
lock = lock_any_ref_for_update(ref.buf, NULL, 0, NULL);
if (!lock)
die_errno(_("Failed to lock ref for update"));
}
if (reflog)
log_all_ref_updates = 1;
if (forcing)
snprintf(msg, sizeof msg, "branch: Reset to %s",
start_name);
else if (!dont_change_ref)
snprintf(msg, sizeof msg, "branch: Created from %s",
start_name);
if (real_ref && track)
setup_tracking(ref.buf + 11, real_ref, track, quiet);
if (!dont_change_ref)
if (write_ref_sha1(lock, sha1, msg) < 0)
die_errno(_("Failed to write ref"));
strbuf_release(&ref);
free(real_ref);
}
int cmd_checkout(int argc, const char **argv, const char *prefix)
{
struct checkout_opts opts;
struct branch_info new_branch_info;
char *conflict_style = NULL;
int dwim_new_local_branch, no_dwim_new_local_branch = 0;
int dwim_remotes_matched = 0;
struct option options[] = {
OPT__QUIET(&opts.quiet, N_("suppress progress reporting")),
OPT_STRING('b', NULL, &opts.new_branch, N_("branch"),
N_("create and checkout a new branch")),
OPT_STRING('B', NULL, &opts.new_branch_force, N_("branch"),
N_("create/reset and checkout a branch")),
OPT_BOOL('l', NULL, &opts.new_branch_log, N_("create reflog for new branch")),
OPT_BOOL(0, "detach", &opts.force_detach, N_("detach HEAD at named commit")),
OPT_SET_INT('t', "track", &opts.track, N_("set upstream info for new branch"),
BRANCH_TRACK_EXPLICIT),
OPT_STRING(0, "orphan", &opts.new_orphan_branch, N_("new-branch"), N_("new unparented branch")),
OPT_SET_INT_F('2', "ours", &opts.writeout_stage,
N_("checkout our version for unmerged files"),
2, PARSE_OPT_NONEG),
OPT_SET_INT_F('3', "theirs", &opts.writeout_stage,
N_("checkout their version for unmerged files"),
3, PARSE_OPT_NONEG),
OPT__FORCE(&opts.force, N_("force checkout (throw away local modifications)"),
PARSE_OPT_NOCOMPLETE),
OPT_BOOL('m', "merge", &opts.merge, N_("perform a 3-way merge with the new branch")),
OPT_BOOL_F(0, "overwrite-ignore", &opts.overwrite_ignore,
N_("update ignored files (default)"),
PARSE_OPT_NOCOMPLETE),
OPT_STRING(0, "conflict", &conflict_style, N_("style"),
N_("conflict style (merge or diff3)")),
OPT_BOOL('p', "patch", &opts.patch_mode, N_("select hunks interactively")),
OPT_BOOL(0, "ignore-skip-worktree-bits", &opts.ignore_skipworktree,
N_("do not limit pathspecs to sparse entries only")),
OPT_BOOL(0, "no-guess", &no_dwim_new_local_branch,
N_("do not second guess 'git checkout <no-such-branch>'")),
OPT_BOOL(0, "ignore-other-worktrees", &opts.ignore_other_worktrees,
N_("do not check if another worktree is holding the given ref")),
{ OPTION_CALLBACK, 0, "recurse-submodules", NULL,
"checkout", "control recursive updating of submodules",
PARSE_OPT_OPTARG, option_parse_recurse_submodules_worktree_updater },
OPT_BOOL(0, "progress", &opts.show_progress, N_("force progress reporting")),
OPT_BOOL(0, "overlay", &opts.overlay_mode, N_("use overlay mode (default)")),
OPT_END(),
};
memset(&opts, 0, sizeof(opts));
memset(&new_branch_info, 0, sizeof(new_branch_info));
opts.overwrite_ignore = 1;
opts.prefix = prefix;
opts.show_progress = -1;
opts.overlay_mode = -1;
git_config(git_checkout_config, &opts);
opts.track = BRANCH_TRACK_UNSPECIFIED;
argc = parse_options(argc, argv, prefix, options, checkout_usage,
PARSE_OPT_KEEP_DASHDASH);
dwim_new_local_branch = !no_dwim_new_local_branch;
if (opts.show_progress < 0) {
if (opts.quiet)
opts.show_progress = 0;
else
opts.show_progress = isatty(2);
}
if (conflict_style) {
opts.merge = 1; /* implied */
git_xmerge_config("merge.conflictstyle", conflict_style, NULL);
}
if ((!!opts.new_branch + !!opts.new_branch_force + !!opts.new_orphan_branch) > 1)
die(_("-b, -B and --orphan are mutually exclusive"));
if (opts.overlay_mode == 1 && opts.patch_mode)
die(_("-p and --overlay are mutually exclusive"));
/*
* From here on, new_branch will contain the branch to be checked out,
* and new_branch_force and new_orphan_branch will tell us which one of
* -b/-B/--orphan is being used.
*/
if (opts.new_branch_force)
opts.new_branch = opts.new_branch_force;
if (opts.new_orphan_branch)
opts.new_branch = opts.new_orphan_branch;
/* --track without -b/-B/--orphan should DWIM */
if (opts.track != BRANCH_TRACK_UNSPECIFIED && !opts.new_branch) {
const char *argv0 = argv[0];
if (!argc || !strcmp(argv0, "--"))
die(_("--track needs a branch name"));
skip_prefix(argv0, "refs/", &argv0);
skip_prefix(argv0, "remotes/", &argv0);
argv0 = strchr(argv0, '/');
if (!argv0 || !argv0[1])
die(_("missing branch name; try -b"));
opts.new_branch = argv0 + 1;
}
/*
* Extract branch name from command line arguments, so
* all that is left is pathspecs.
*
* Handle
*
* 1) git checkout <tree> -- [<paths>]
* 2) git checkout -- [<paths>]
* 3) git checkout <something> [<paths>]
*
* including "last branch" syntax and DWIM-ery for names of
* remote branches, erroring out for invalid or ambiguous cases.
*/
if (argc) {
struct object_id rev;
int dwim_ok =
!opts.patch_mode &&
dwim_new_local_branch &&
opts.track == BRANCH_TRACK_UNSPECIFIED &&
!opts.new_branch;
int n = parse_branchname_arg(argc, argv, dwim_ok,
&new_branch_info, &opts, &rev,
&dwim_remotes_matched);
argv += n;
argc -= n;
}
if (argc) {
parse_pathspec(&opts.pathspec, 0,
opts.patch_mode ? PATHSPEC_PREFIX_ORIGIN : 0,
prefix, argv);
if (!opts.pathspec.nr)
die(_("invalid path specification"));
/*
* Try to give more helpful suggestion.
* new_branch && argc > 1 will be caught later.
*/
if (opts.new_branch && argc == 1)
die(_("'%s' is not a commit and a branch '%s' cannot be created from it"),
argv[0], opts.new_branch);
if (opts.force_detach)
die(_("git checkout: --detach does not take a path argument '%s'"),
argv[0]);
if (1 < !!opts.writeout_stage + !!opts.force + !!opts.merge)
die(_("git checkout: --ours/--theirs, --force and --merge are incompatible when\n"
"checking out of the index."));
}
if (opts.new_branch) {
struct strbuf buf = STRBUF_INIT;
if (opts.new_branch_force)
opts.branch_exists = validate_branchname(opts.new_branch, &buf);
else
opts.branch_exists =
validate_new_branchname(opts.new_branch, &buf, 0);
strbuf_release(&buf);
}
UNLEAK(opts);
if (opts.patch_mode || opts.pathspec.nr) {
int ret = checkout_paths(&opts, new_branch_info.name);
if (ret && dwim_remotes_matched > 1 &&
advice_checkout_ambiguous_remote_branch_name)
advise(_("'%s' matched more than one remote tracking branch.\n"
"We found %d remotes with a reference that matched. So we fell back\n"
"on trying to resolve the argument as a path, but failed there too!\n"
"\n"
"If you meant to check out a remote tracking branch on, e.g. 'origin',\n"
"you can do so by fully qualifying the name with the --track option:\n"
"\n"
" git checkout --track origin/<name>\n"
"\n"
"If you'd like to always have checkouts of an ambiguous <name> prefer\n"
"one remote, e.g. the 'origin' remote, consider setting\n"
"checkout.defaultRemote=origin in your config."),
argv[0],
dwim_remotes_matched);
return ret;
} else {
return checkout_branch(&opts, &new_branch_info);
}
}
static void copy_or_rename_branch(const char *oldname, const char *newname, int copy, int force)
{
struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
const char *interpreted_oldname = NULL;
const char *interpreted_newname = NULL;
int recovery = 0;
if (!oldname) {
if (copy)
die(_("cannot copy the current branch while not on any."));
else
die(_("cannot rename the current branch while not on any."));
}
if (strbuf_check_branch_ref(&oldref, oldname)) {
/*
* Bad name --- this could be an attempt to rename a
* ref that we used to allow to be created by accident.
*/
if (ref_exists(oldref.buf))
recovery = 1;
else
die(_("Invalid branch name: '%s'"), oldname);
}
/*
* A command like "git branch -M currentbranch currentbranch" cannot
* cause the worktree to become inconsistent with HEAD, so allow it.
*/
if (!strcmp(oldname, newname))
validate_branchname(newname, &newref);
else
validate_new_branchname(newname, &newref, force);
reject_rebase_or_bisect_branch(oldref.buf);
if (!skip_prefix(oldref.buf, "refs/heads/", &interpreted_oldname) ||
!skip_prefix(newref.buf, "refs/heads/", &interpreted_newname)) {
BUG("expected prefix missing for refs");
}
if (copy)
strbuf_addf(&logmsg, "Branch: copied %s to %s",
oldref.buf, newref.buf);
else
strbuf_addf(&logmsg, "Branch: renamed %s to %s",
oldref.buf, newref.buf);
if (!copy && rename_ref(oldref.buf, newref.buf, logmsg.buf))
die(_("Branch rename failed"));
if (copy && copy_existing_ref(oldref.buf, newref.buf, logmsg.buf))
die(_("Branch copy failed"));
if (recovery) {
if (copy)
warning(_("Created a copy of a misnamed branch '%s'"),
interpreted_oldname);
else
warning(_("Renamed a misnamed branch '%s' away"),
interpreted_oldname);
}
if (!copy &&
replace_each_worktree_head_symref(oldref.buf, newref.buf, logmsg.buf))
die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
strbuf_release(&logmsg);
strbuf_addf(&oldsection, "branch.%s", interpreted_oldname);
strbuf_release(&oldref);
strbuf_addf(&newsection, "branch.%s", interpreted_newname);
strbuf_release(&newref);
if (!copy && git_config_rename_section(oldsection.buf, newsection.buf) < 0)
die(_("Branch is renamed, but update of config-file failed"));
if (copy && strcmp(oldname, newname) && git_config_copy_section(oldsection.buf, newsection.buf) < 0)
die(_("Branch is copied, but update of config-file failed"));
strbuf_release(&oldsection);
strbuf_release(&newsection);
}
