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git add --intent-to-add: fix removal of cached emptiness

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This uses the extended index flag mechanism introduced earlier to mark
the entries added to the index via "git add -N" with CE_INTENT_TO_ADD.

The logic to detect an "intent to add" entry for the purpose of allowing
"git rm --cached $path" is tightened to check not just for a staged empty
blob, but with the CE_INTENT_TO_ADD bit.  This protects an empty blob that
was explicitly added and then modified in the work tree from being dropped
with this sequence:

	$ >empty
	$ git add empty
	$ echo "non empty" >empty
	$ git rm --cached empty

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2008-11-28 19:55:25 -08:00
parent 69530cb0c0
commit 388b2acd6e
4 changed files with 7 additions and 4 deletions
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2
builtin-rm.c
View File

@ -115,7 +115,7 @@ static int check_local_mod(unsigned char *head, int index_only)
* "intent to add" entry.
*/
if (local_changes && staged_changes) {
if (!index_only || !is_empty_blob_sha1(ce->sha1))
if (!index_only || !(ce->ce_flags & CE_INTENT_TO_ADD))
errs = error("'%s' has staged content different "
"from both the file and the HEAD\n"
"(use -f to force removal)", name);

3
cache.h
View File

@ -176,10 +176,11 @@ struct cache_entry {
/*
* Extended on-disk flags
*/
#define CE_INTENT_TO_ADD 0x20000000
/* CE_EXTENDED2 is for future extension */
#define CE_EXTENDED2 0x80000000
#define CE_EXTENDED_FLAGS (0)
#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD)
/*
* Safeguard to avoid saving wrong flags:

2
read-cache.c
View File

@ -546,6 +546,8 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
ce->ce_flags = namelen;
if (!intent_only)
fill_stat_cache_info(ce, st);
else
ce->ce_flags |= CE_INTENT_TO_ADD;
if (trust_executable_bit && has_symlinks)
ce->ce_mode = create_ce_mode(st_mode);

4
t/t3600-rm.sh
View File

@ -187,8 +187,8 @@ test_expect_success 'but with -f it should work.' '
test_must_fail git ls-files --error-unmatch baz
'
test_expect_failure 'refuse to remove cached empty file with modifications' '
touch empty &&
test_expect_success 'refuse to remove cached empty file with modifications' '
>empty &&
git add empty &&
echo content >empty &&
test_must_fail git rm --cached empty