From: Junio C Hamano Date: Sat, 7 Apr 2007 12:52:57 +0000 (-0700) Subject: merge-recursive: do not barf on "to be removed" entries. X-Git-Tag: v1.5.2-rc0~39^2~2 X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=ac7f0f436e4f45d616ca509f5163fddab104516b;p=git.git merge-recursive: do not barf on "to be removed" entries. 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 --- diff --git a/merge-recursive.c b/merge-recursive.c index 3096594b3..0e259566e 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -1018,9 +1018,9 @@ 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 */ @@ -1033,12 +1033,12 @@ 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 */ @@ -1139,6 +1139,12 @@ 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.");