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Author SHA1 Message Date

Author	SHA1	Message	Date
Jens Lehmann	ea5070c91f	Teach read-tree the -n\|--dry-run option The option can be used to check if read-tree with the same set of other options like "-m" and "-u" would succeed without actually changing either the index or the working tree. The relevant tests in the t10?? range were extended to do a read-tree -n before the real read-tree to make sure neither the index nor any local files were changed with -n and the same exit code as without -n is returned. The helper functions added for that purpose reside in the new t/lib-read-tree.sh file. The only exception is #13 in t1004 ("unlinking an un-unlink-able symlink"). As this is an issue of wrong directory permissions it is not detected with -n. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>	14 years ago
Junio C Hamano	aab3b9a1aa	read-tree A B C: do not create a bogus index and do not segfault "git read-tree A B C..." without the "-m" (merge) option is a way to read these trees on top of each other to get an overlay of them. An ancient commit `ee6566e` (Rewrite read-tree, 2005-09-05) passed the ADD_CACHE_SKIP_DFCHECK flag when calling add_index_entry() to add the paths obtained from these trees to the index, but it is an incorrect use of the flag. The flag is meant to be used by callers who know the addition of the entry does not introduce a D/F conflict to the index in order to avoid the overhead of checking. This bug resulted in a bogus index that records both "x" and "x/z" as a blob after reading three trees that have paths ("x"), ("x", "y"), and ("x/z", "y") respectively. `34110cd` (Make 'unpack_trees()' have a separate source and destination index, 2008-03-06) refactored the callsites of add_index_entry() incorrectly and added more codepaths that use this flag when it shouldn't be used. Also, `0190457` (Move 'unpack_trees()' over to 'traverse_trees()' interface, 2008-03-05) introduced a bug to call add_index_entry() for the tree that does not have the path in it, passing NULL as a cache entry. This caused reading multiple trees, one of which has path "x" but another doesn't, to segfault. Signed-off-by: Junio C Hamano <gitster@pobox.com>	16 years ago

Jens Lehmann

ea5070c91f

Teach read-tree the -n|--dry-run option

The option can be used to check if read-tree with the same set of other
options like "-m" and "-u" would succeed without actually changing either
the index or the working tree.

The relevant tests in the t10?? range were extended to do a read-tree -n
before the real read-tree to make sure neither the index nor any local
files were changed with -n and the same exit code as without -n is
returned. The helper functions added for that purpose reside in the new
t/lib-read-tree.sh file.

The only exception is #13 in t1004 ("unlinking an un-unlink-able
symlink"). As this is an issue of wrong directory permissions it is not
detected with -n.

Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

14 years ago

Junio C Hamano

aab3b9a1aa

read-tree A B C: do not create a bogus index and do not segfault

"git read-tree A B C..." without the "-m" (merge) option is a way to read
these trees on top of each other to get an overlay of them.

An ancient commit ee6566e (Rewrite read-tree, 2005-09-05) passed the
ADD_CACHE_SKIP_DFCHECK flag when calling add_index_entry() to add the
paths obtained from these trees to the index, but it is an incorrect use
of the flag.  The flag is meant to be used by callers who know the
addition of the entry does not introduce a D/F conflict to the index in
order to avoid the overhead of checking.

This bug resulted in a bogus index that records both "x" and "x/z" as a
blob after reading three trees that have paths ("x"), ("x", "y"), and
("x/z", "y") respectively.  34110cd (Make 'unpack_trees()' have a separate
source and destination index, 2008-03-06) refactored the callsites of
add_index_entry() incorrectly and added more codepaths that use this flag
when it shouldn't be used.

Also, 0190457 (Move 'unpack_trees()' over to 'traverse_trees()' interface,
2008-03-05) introduced a bug to call add_index_entry() for the tree that
does not have the path in it, passing NULL as a cache entry.  This caused
reading multiple trees, one of which has path "x" but another doesn't, to
segfault.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

16 years ago

2 Commits (e63f87a6f7a4e55f50e67b112f26d9a1e4e7f3ab)