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Make branch merging aware of underlying case-insensitive filsystems

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If we find an unexpected file, see if that filename perhaps exists in a
case-insensitive way in the index, and whether the file matches that. If
so, ignore it as a known pre-existing file of a different name.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Linus Torvalds 2008-03-22 09:35:59 -07:00 committed by Junio C Hamano
parent 0a9b88b7de
commit 32260ad5db
2 changed files with 27 additions and 1 deletions
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26
unpack-trees.c
View file

@ -520,6 +520,22 @@ static int verify_clean_subdirectory(struct cache_entry *ce, const char *action,
return cnt;
}
/*
* This gets called when there was no index entry for the tree entry 'dst',
* but we found a file in the working tree that 'lstat()' said was fine,
* and we're on a case-insensitive filesystem.
*
* See if we can find a case-insensitive match in the index that also
* matches the stat information, and assume it's that other file!
*/
static int icase_exists(struct unpack_trees_options *o, struct cache_entry *dst, struct stat *st)
{
struct cache_entry *src;
src = index_name_exists(o->src_index, dst->name, ce_namelen(dst), 1);
return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID);
}
/*
* We do not want to remove or overwrite a working tree file that
* is not tracked, unless it is ignored.
@ -540,6 +556,16 @@ static int verify_absent(struct cache_entry *ce, const char *action,
int dtype = ce_to_dtype(ce);
struct cache_entry *result;
/*
* It may be that the 'lstat()' succeeded even though
* target 'ce' was absent, because there is an old
* entry that is different only in case..
*
* Ignore that lstat() if it matches.
*/
if (ignore_case && icase_exists(o, ce, &st))
return 0;
if (o->dir && excluded(o->dir, ce->name, &dtype))
/*
* ce->name is explicitly excluded, so it is Ok to

2
unpack-trees.h
View file

@ -31,7 +31,7 @@ struct unpack_trees_options {
void *unpack_data;
struct index_state *dst_index;
const struct index_state *src_index;
struct index_state *src_index;
struct index_state result;
};