[PATCH 31/48] merge-recursive: Make dead code for rename/rename(2to1) conflicts undead
- From
Elijah Newren <newren@gmail.com>
- Date
- Jun 8, 2011, 07:31 UTC
- Message-ID
- <1307518278-23814-32-git-send-email-newren@gmail.com>
- In-Reply-To
- <1307518278-23814-1-git-send-email-newren@gmail.com>
The code for rename_rename_2to1 conflicts (two files both being renamed to the same filename) was dead since the rename/add path was always being independently triggered for each of the renames instead. Further, reviving the dead code showed that it was inherently buggy and would always segfault -- among a few other bugs.
Move the else-if branch for the rename/rename block before the rename/add block to make sure it is checked first, and fix up the rename/rename(2to1) code segments to make it handle most cases. Work is still needed to handle higher dimensional corner cases such as rename/rename/modify/modify issues.
Signed-off-by: Elijah Newren <newren@gmail.com> --- merge-recursive.c | 70 +++++++++++++++++++++++++----------- t/t6036-recursive-corner-cases.sh | 17 +++++---- 2 files changed, 57 insertions(+), 30 deletions(-)
diff --git a/merge-recursive.c b/merge-recursive.c index 749e501..4c42838 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -983,17 +983,36 @@ static void conflict_rename_rename_2to1(struct merge_options *o, struct rename *ren2, const char *branch2) { + char *path = ren1->pair->two->path; /* same as ren2->pair->two->path */ /* Two files were renamed to the same thing. */ - char *new_path1 = unique_path(o, ren1->pair->two->path, branch1); - char *new_path2 = unique_path(o, ren2->pair->two->path, branch2); - output(o, 1, "Renaming %s to %s and %s to %s instead", - ren1->pair->one->path, new_path1, - ren2->pair->one->path, new_path2); - remove_file(o, 0, ren1->pair->two->path, 0); - update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1); - update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2); - free(new_path2); - free(new_path1); + if (o->call_depth) { + struct merge_file_info mfi; + struct diff_filespec one, a, b; + + one.path = a.path = b.path = path; + hashcpy(one.sha1, null_sha1); + one.mode = 0; + hashcpy(a.sha1, ren1->pair->two->sha1); + a.mode = ren1->pair->two->mode; + hashcpy(b.sha1, ren2->pair->two->sha1); + b.mode = ren2->pair->two->mode; + mfi = merge_file(o, &one, &a, &b, branch1, branch2); + output(o, 1, "Adding merged %s", path); + update_file(o, 0, mfi.sha, mfi.mode, path); + } else { + char *new_path1 = unique_path(o, path, branch1); + char *new_path2 = unique_path(o, path, branch2); + output(o, 1, "Renaming %s to %s and %s to %s instead", + ren1->pair->one->path, new_path1, + ren2->pair->one->path, new_path2); + remove_file(o, 0, path, 0); + update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, + new_path1); + update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, + new_path2); + free(new_path2); + free(new_path1); + } } static int process_renames(struct merge_options *o, @@ -1008,12 +1027,12 @@ static int process_renames(struct merge_options *o, for (i = 0; i < a_renames->nr; i++) { sre = a_renames->items[i].util; string_list_insert(&a_by_dst, sre->pair->two->path)->util - = sre->dst_entry; + = (void*)sre; } for (i = 0; i < b_renames->nr; i++) { sre = b_renames->items[i].util; string_list_insert(&b_by_dst, sre->pair->two->path)->util - = sre->dst_entry; + = (void*)sre; } for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) { @@ -1125,6 +1144,23 @@ static int process_renames(struct merge_options *o, clean_merge = 0; conflict_rename_delete(o, ren1->pair, branch1, branch2); } + } else if ((item = string_list_lookup(renames2Dst, ren1_dst))) { + char *ren2_src, *ren2_dst; + ren2 = item->util; + ren2_src = ren2->pair->one->path; + ren2_dst = ren2->pair->two->path; + + clean_merge = 0; + ren2->processed = 1; + remove_file(o, 1, ren2_src, + renamed_stage == 3 || would_lose_untracked(ren1_src)); + + output(o, 1, "CONFLICT (rename/rename): " + "Rename %s->%s in %s. " + "Rename %s->%s in %s", + ren1_src, ren1_dst, branch1, + ren2_src, ren2_dst, branch2); + conflict_rename_rename_2to1(o, ren1, branch1, ren2, branch2); } else if ((dst_other.mode == ren1->pair->two->mode) && sha_eq(dst_other.sha1, ren1->pair->two->sha1)) { /* Added file on the other side @@ -1165,16 +1201,6 @@ static int process_renames(struct merge_options *o, update_file(o, 0, dst_other.sha1, dst_other.mode, new_path); free(new_path); } - } else if ((item = string_list_lookup(renames2Dst, ren1_dst))) { - ren2 = item->util; - clean_merge = 0; - ren2->processed = 1; - output(o, 1, "CONFLICT (rename/rename): " - "Rename %s->%s in %s. " - "Rename %s->%s in %s", - ren1_src, ren1_dst, branch1, - ren2->pair->one->path, ren2->pair->two->path, branch2); - conflict_rename_rename_2to1(o, ren1, branch1, ren2, branch2); } else try_merge = 1; diff --git a/t/t6036-recursive-corner-cases.sh b/t/t6036-recursive-corner-cases.sh index dea2a65..8d1d303 100755 --- a/t/t6036-recursive-corner-cases.sh +++ b/t/t6036-recursive-corner-cases.sh @@ -60,13 +60,13 @@ test_expect_success 'merge simple rename+criss-cross with no modifications' ' test $(git rev-parse :2:three) = $(git rev-parse L2:three) && test $(git rev-parse :3:three) = $(git rev-parse R2:three) && - cp two merged && + cp one merged && >empty && test_must_fail git merge-file \ - -L "Temporary merge branch 2" \ - -L "" \ -L "Temporary merge branch 1" \ - merged empty one && + -L "" \ + -L "Temporary merge branch 2" \ + merged empty two && test $(git rev-parse :1:three) = $(git hash-object merged) ' @@ -139,11 +139,12 @@ test_expect_success 'merge criss-cross + rename merges with basic modification' cp one merge-me && >empty && test_must_fail git merge-file \ - -L "Temporary merge branch 2" \ - -L "" \ -L "Temporary merge branch 1" \ - merged empty merge-me && - test $(git rev-parse :1:three) = $(git hash-object merged) + -L "" \ + -L "Temporary merge branch 2" \ + merge-me empty merged && + + test $(git rev-parse :1:three) = $(git hash-object merge-me) ' #
-- 1.7.6.rc0.62.g2d69f