[PATCH 3/5] merge-recursive: do not barf on "to be removed" entries.
- From
Junio C Hamano <junkio@cox.net>
- Date
- Apr 7, 2007, 14:40 UTC
- Message-ID
- <7v8xd4ckne.fsf@assigned-by-dhcp.cox.net>
When update-trees::threeway_merge() decides that a path that exists in the current index (and HEAD) is to be removed, it leaves a stage 0 entry whose mode bits are set to 0. The code mistook it as "this stage wants the blob here", and proceeded to call update_file_flags() which ended up trying to put the mode=0 entry in the index, got very confused, and ended up barfing with "do not know what to do with 000000".
Since threeway_merge() does not handle case #10 (one side removes while the other side does not do anything), this is not a problem while we refuse to merge branches that have D/F conflicts, but when we start resolving them, we would need to be able to remove cache entries, and at that point it starts to matter.
Signed-off-by: Junio C Hamano <junkio@cox.net> --- merge-recursive.c | 16 +++++++++++----- 1 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/merge-recursive.c b/merge-recursive.c index e1aebd7..aa3d913 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -1002,9 +1002,9 @@ static int process_renames(struct path_list *a_renames, return clean_merge; } -static unsigned char *has_sha(const unsigned char *sha) +static unsigned char *stage_sha(const unsigned char *sha, unsigned mode) { - return is_null_sha1(sha) ? NULL: (unsigned char *)sha; + return (is_null_sha1(sha) || mode == 0) ? NULL: (unsigned char *)sha; } /* Per entry merge function */ @@ -1017,12 +1017,12 @@ static int process_entry(const char *path, struct stage_data *entry, print_index_entry("\tpath: ", entry); */ int clean_merge = 1; - unsigned char *o_sha = has_sha(entry->stages[1].sha); - unsigned char *a_sha = has_sha(entry->stages[2].sha); - unsigned char *b_sha = has_sha(entry->stages[3].sha); unsigned o_mode = entry->stages[1].mode; unsigned a_mode = entry->stages[2].mode; unsigned b_mode = entry->stages[3].mode; + unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode); + unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); + unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); if (o_sha && (!a_sha || !b_sha)) { /* Case A: Deleted in one */ @@ -1123,6 +1123,12 @@ static int process_entry(const char *path, struct stage_data *entry, update_file_flags(mfi.sha, mfi.mode, path, 0 /* update_cache */, 1 /* update_working_directory */); } + } else if (!o_sha && !a_sha && !b_sha) { + /* + * this entry was deleted altogether. a_mode == 0 means + * we had that path and want to actively remove it. + */ + remove_file(1, path, !a_mode); } else die("Fatal merge failure, shouldn't happen.");
-- 1.5.1.81.gee969