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reset: improve worktree safety valves

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The existing code checked to make sure we were not in a bare
repository when doing a hard reset. However, we should take
this one step further, and make sure we are in a worktree.
Otherwise, we can end up munging files inside of '.git'.

Furthermore, we should do the same check for --merge resets,
which have the same properties. Actually, a merge reset of
HEAD^ would already complain, since further down in the code
we want a worktree. However, it is nicer to check up-front;
then we are sure we cover all cases ("git reset --merge"
would run, even though it wasn't doing anything) and we can
give a more specific message.

Add tests to t7103 to cover these cases and some missing ones.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2009-12-04 06:11:58 -05:00 committed by Junio C Hamano
parent 50d9bbba92
commit 952dfc6944
2 changed files with 33 additions and 5 deletions
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6
builtin-reset.c
View File

@ -286,8 +286,10 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
if (reset_type == NONE)
reset_type = MIXED; /* by default */
if (reset_type == HARD && is_bare_repository())
die("hard reset makes no sense in a bare repository");
if ((reset_type == HARD || reset_type == MERGE)
&& !is_inside_work_tree())
die("%s reset requires a work tree",
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

32
t/t7103-reset-bare.sh
View File

@ -11,16 +11,42 @@ test_expect_success 'setup non-bare' '
git commit -a -m two
'
test_expect_success 'hard reset requires a worktree' '
(cd .git &&
test_must_fail git reset --hard)
'
test_expect_success 'merge reset requires a worktree' '
(cd .git &&
test_must_fail git reset --merge)
'
test_expect_success 'mixed reset is ok' '
(cd .git && git reset)
'
test_expect_success 'soft reset is ok' '
(cd .git && git reset --soft)
'
test_expect_success 'setup bare' '
git clone --bare . bare.git &&
cd bare.git
'
test_expect_success 'hard reset is not allowed' '
test_must_fail git reset --hard HEAD^
test_expect_success 'hard reset is not allowed in bare' '
test_must_fail git reset --hard HEAD^
'
test_expect_success 'soft reset is allowed' '
test_expect_success 'merge reset is not allowed in bare' '
test_must_fail git reset --merge HEAD^
'
test_expect_success 'mixed reset is not allowed in bare' '
test_must_fail git reset --mixed HEAD^
'
test_expect_success 'soft reset is allowed in bare' '
git reset --soft HEAD^ &&
test "`git show --pretty=format:%s | head -n 1`" = "one"
'