checkout: don't require a work tree when checking out into a new one

For normal use cases, it does not make sense for 'checkout' to work on
a bare repository, without a worktree. But "checkout --to" is an
exception because it _creates_ a new worktree. Allow this option to
run on bare repositories.

People who check out from a bare repository should remember that
core.logallrefupdates is off by default and it should be turned back
on. `--to` cannot do this automatically behind the user's back because
some user may deliberately want no reflog.

For people interested in repository setup/discovery code,
is_bare_repository_cfg (aka "core.bare") is unchanged by this patch,
which means 'true' by default for bare repos. Fortunately when we get
the repo through a linked checkout, is_bare_repository_cfg is never
used. So all is still good.

[nd: commit message]

Signed-off-by: Dennis Kaarsemaker <dennis@kaarsemaker.net>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Dennis Kaarsemaker 2014-11-30 15:24:56 +07:00 коммит произвёл Junio C Hamano
Родитель 6cfbdcb2ab
Коммит 3473ad0cf6
3 изменённых файлов: 19 добавлений и 1 удалений

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@ -1364,6 +1364,9 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
if (opts.new_worktree_mode)
opts.new_worktree = NULL;
if (!opts.new_worktree)
setup_work_tree();
if (conflict_style) {
opts.merge = 1; /* implied */
git_xmerge_config("merge.conflictstyle", conflict_style, NULL);

2
git.c
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@ -383,7 +383,7 @@ static struct cmd_struct commands[] = {
{ "check-ignore", cmd_check_ignore, RUN_SETUP | NEED_WORK_TREE },
{ "check-mailmap", cmd_check_mailmap, RUN_SETUP },
{ "check-ref-format", cmd_check_ref_format },
{ "checkout", cmd_checkout, RUN_SETUP | NEED_WORK_TREE },
{ "checkout", cmd_checkout, RUN_SETUP },
{ "checkout-index", cmd_checkout_index,
RUN_SETUP | NEED_WORK_TREE},
{ "cherry", cmd_cherry, RUN_SETUP },

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@ -81,4 +81,19 @@ test_expect_success 'not die on re-checking out current branch' '
)
'
test_expect_success 'checkout --to from a bare repo' '
(
git clone --bare . bare &&
cd bare &&
git checkout --to ../there2 -b bare-master master
)
'
test_expect_success 'checkout from a bare repo without --to' '
(
cd bare &&
test_must_fail git checkout master
)
'
test_done