3 test_description='recursive merge corner cases involving criss-cross merges'
17 test_expect_success 'setup basic criss-cross + rename with no modifications' '
18 test_create_repo basic-rename &&
22 ten="0 1 2 3 4 5 6 7 8 9" &&
25 echo line $i in a sample file
29 echo line $i in another sample file
32 test_tick && git commit -m initial &&
37 test_tick && git commit -m R1 &&
41 test_tick && git commit -m L1 &&
44 test_tick && git merge -s ours R1 &&
48 test_tick && git merge -s ours L1 &&
53 test_expect_success 'merge simple rename+criss-cross with no modifications' '
60 test_must_fail git merge -s recursive R2^0 &&
62 git ls-files -s >out &&
63 test_line_count = 5 out &&
64 git ls-files -u >out &&
65 test_line_count = 3 out &&
66 git ls-files -o >out &&
67 test_line_count = 1 out &&
69 git rev-parse >expect \
71 git rev-parse >actual \
73 test_cmp expect actual
78 # Same as before, but modify L1 slightly:
89 test_expect_success 'setup criss-cross + rename merges with basic modification' '
90 test_create_repo rename-modify &&
94 ten="0 1 2 3 4 5 6 7 8 9" &&
97 echo line $i in a sample file
101 echo line $i in another sample file
104 test_tick && git commit -m initial &&
107 git checkout -b R1 &&
111 test_tick && git commit -m R1 &&
115 test_tick && git commit -m L1 &&
118 test_tick && git merge -s ours R1 &&
122 test_tick && git merge -s ours L1 &&
127 test_expect_success 'merge criss-cross + rename merges with basic modification' '
133 test_must_fail git merge -s recursive R2^0 &&
135 git ls-files -s >out &&
136 test_line_count = 5 out &&
137 git ls-files -u >out &&
138 test_line_count = 3 out &&
139 git ls-files -o >out &&
140 test_line_count = 1 out &&
142 git rev-parse >expect \
144 git rev-parse >actual \
146 test_cmp expect actual
151 # For the next test, we start with three commits in two lines of development
152 # which setup a rename/add conflict:
153 # Commit A: File 'a' exists
154 # Commit B: Rename 'a' -> 'new_a'
155 # Commit C: Modify 'a', create different 'new_a'
156 # Later, two different people merge and resolve differently:
157 # Commit D: Merge B & C, ignoring separately created 'new_a'
158 # Commit E: Merge B & C making use of some piece of secondary 'new_a'
159 # Finally, someone goes to merge D & E. Does git detect the conflict?
170 test_expect_success 'setup differently handled merges of rename/add conflict' '
171 test_create_repo rename-add &&
175 printf "0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n" >a &&
177 test_tick && git commit -m A &&
182 test_write_lines 0 1 2 3 4 5 6 7 foobar >new_a &&
184 test_tick && git commit -m C &&
188 test_tick && git commit -m B &&
191 test_must_fail git merge C &&
192 git show :2:new_a >new_a &&
194 test_tick && git commit -m D &&
198 test_must_fail git merge B &&
199 test_write_lines 0 1 2 3 4 5 6 7 bad_merge >new_a &&
201 test_tick && git commit -m E &&
206 test_expect_success 'git detects differently handled merges conflict' '
212 test_must_fail git merge -s recursive E^0 &&
214 git ls-files -s >out &&
215 test_line_count = 3 out &&
216 git ls-files -u >out &&
217 test_line_count = 3 out &&
218 git ls-files -o >out &&
219 test_line_count = 1 out &&
221 git cat-file -p C:new_a >ours &&
222 git cat-file -p C:a >theirs &&
224 test_must_fail git merge-file \
225 -L "Temporary merge branch 1" \
227 -L "Temporary merge branch 2" \
229 sed -e "s/^\([<=>]\)/\1\1\1/" ours >ours-tweaked &&
230 git hash-object ours-tweaked >expect &&
231 git rev-parse >>expect \
233 git rev-parse >actual \
234 :1:new_a :2:new_a :3:new_a &&
235 test_cmp expect actual &&
237 # Test that the two-way merge in new_a is as expected
238 git cat-file -p D:new_a >ours &&
239 git cat-file -p E:new_a >theirs &&
241 test_must_fail git merge-file \
246 sed -e "s/^\([<=>]\)/\1\1\1/" ours >expect &&
247 git hash-object new_a >actual &&
248 git hash-object ours >expect &&
249 test_cmp expect actual
253 # Repeat the above testcase with precisely the same setup, other than with
254 # the two merge bases having different orderings of commit timestamps so
255 # that they are reversed in the order they are provided to merge-recursive,
256 # so that we can improve code coverage.
257 test_expect_success 'git detects differently handled merges conflict, swapped' '
261 # Difference #1: Do cleanup from previous testrun
265 # Difference #2: Change commit timestamps
266 btime=$(git log --no-walk --date=raw --format=%cd B | awk "{print \$1}") &&
267 ctime=$(git log --no-walk --date=raw --format=%cd C | awk "{print \$1}") &&
268 newctime=$(($btime+1)) &&
269 git fast-export --no-data --all | sed -e s/$ctime/$newctime/ | git fast-import --force --quiet &&
270 # End of most differences; rest is copy-paste of last test,
271 # other than swapping C:a and C:new_a due to order switch
274 test_must_fail git merge -s recursive E^0 &&
276 git ls-files -s >out &&
277 test_line_count = 3 out &&
278 git ls-files -u >out &&
279 test_line_count = 3 out &&
280 git ls-files -o >out &&
281 test_line_count = 1 out &&
283 git cat-file -p C:a >ours &&
284 git cat-file -p C:new_a >theirs &&
286 test_must_fail git merge-file \
287 -L "Temporary merge branch 1" \
289 -L "Temporary merge branch 2" \
291 sed -e "s/^\([<=>]\)/\1\1\1/" ours >ours-tweaked &&
292 git hash-object ours-tweaked >expect &&
293 git rev-parse >>expect \
295 git rev-parse >actual \
296 :1:new_a :2:new_a :3:new_a &&
297 test_cmp expect actual &&
299 # Test that the two-way merge in new_a is as expected
300 git cat-file -p D:new_a >ours &&
301 git cat-file -p E:new_a >theirs &&
303 test_must_fail git merge-file \
308 sed -e "s/^\([<=>]\)/\1\1\1/" ours >expect &&
309 git hash-object new_a >actual &&
310 git hash-object ours >expect &&
311 test_cmp expect actual
316 # criss-cross + modify/delete:
326 # Commit A: file with contents 'A\n'
327 # Commit B: file with contents 'B\n'
328 # Commit C: file not present
329 # Commit D: file with contents 'B\n'
330 # Commit E: file not present
332 # Merging commits D & E should result in modify/delete conflict.
334 test_expect_success 'setup criss-cross + modify/delete resolved differently' '
335 test_create_repo modify-delete &&
357 test_must_fail git merge C &&
365 test_must_fail git merge B &&
373 test_expect_success 'git detects conflict merging criss-cross+modify/delete' '
379 test_must_fail git merge -s recursive E^0 &&
381 git ls-files -s >out &&
382 test_line_count = 2 out &&
383 git ls-files -u >out &&
384 test_line_count = 2 out &&
386 git rev-parse >expect \
387 master:file B:file &&
388 git rev-parse >actual \
390 test_cmp expect actual
394 test_expect_success 'git detects conflict merging criss-cross+modify/delete, reverse direction' '
401 test_must_fail git merge -s recursive D^0 &&
403 git ls-files -s >out &&
404 test_line_count = 2 out &&
405 git ls-files -u >out &&
406 test_line_count = 2 out &&
408 git rev-parse >expect \
409 master:file B:file &&
410 git rev-parse >actual \
412 test_cmp expect actual
416 # SORRY FOR THE SUPER LONG DESCRIPTION, BUT THIS NEXT ONE IS HAIRY
418 # criss-cross + d/f conflict via add/add:
419 # Commit A: Neither file 'a' nor directory 'a/' exists.
420 # Commit B: Introduce 'a'
421 # Commit C: Introduce 'a/file'
422 # Commit D1: Merge B & C, keeping 'a' and deleting 'a/'
423 # Commit E1: Merge B & C, deleting 'a' but keeping 'a/file'
433 # I'll describe D2, E2, & E3 (which are alternatives for D1 & E1) more below...
435 # Merging D1 & E1 requires we first create a virtual merge base X from
436 # merging A & B in memory. There are several possibilities for the merge-base:
437 # 1: Keep both 'a' and 'a/file' (assuming crazy filesystem allowing a tree
438 # with a directory and file at same path): results in merge of D1 & E1
439 # being clean with both files deleted. Bad (no conflict detected).
440 # 2: Keep 'a' but not 'a/file': Merging D1 & E1 is clean and matches E1. Bad.
441 # 3: Keep 'a/file' but not 'a': Merging D1 & E1 is clean and matches D1. Bad.
442 # 4: Keep neither file: Merging D1 & E1 reports the D/F add/add conflict.
444 # So 4 sounds good for this case, but if we were to merge D1 & E3, where E3
446 # Commit E3: Merge B & C, keeping modified a, and deleting a/
447 # then we'd get an add/add conflict for 'a', which seems suboptimal. A little
448 # creativity leads us to an alternate choice:
449 # 5: Keep 'a' as 'a~$UNIQUE' and a/file; results:
450 # Merge D1 & E1: rename/delete conflict for 'a'; a/file silently deleted
451 # Merge D1 & E3 is clean, as expected.
453 # So choice 5 at least provides some kind of conflict for the original case,
454 # and can merge cleanly as expected with D1 and E3. It also made things just
455 # slightly funny for merging D1 and E4, where E4 is defined as:
456 # Commit E4: Merge B & C, modifying 'a' and renaming to 'a2', and deleting 'a/'
457 # in this case, we'll get a rename/rename(1to2) conflict because a~$UNIQUE
458 # gets renamed to 'a' in D1 and to 'a2' in E4. But that's better than having
459 # two files (both 'a' and 'a2') sitting around without the user being notified
460 # that we could detect they were related and need to be merged. Also, choice
461 # 5 makes the handling of 'a/file' seem suboptimal. What if we were to merge
462 # D2 and E4, where D2 is:
463 # Commit D2: Merge B & C, renaming 'a'->'a2', keeping 'a/file'
464 # This would result in a clean merge with 'a2' having three-way merged
465 # contents (good), and deleting 'a/' (bad) -- it doesn't detect the
466 # conflict in how the different sides treated a/file differently.
467 # Continuing down the creative route:
468 # 6: Keep 'a' as 'a~$UNIQUE1' and keep 'a/' as 'a~$UNIQUE2/'; results:
469 # Merge D1 & E1: rename/delete conflict for 'a' and each path under 'a/'.
470 # Merge D1 & E3: clean, as expected.
471 # Merge D1 & E4: rename/rename(1to2) conflict on 'a' vs 'a2'.
472 # Merge D2 & E4: clean for 'a2', rename/delete for a/file
474 # Choice 6 could cause rename detection to take longer (providing more targets
475 # that need to be searched). Also, the conflict message for each path under
476 # 'a/' might be annoying unless we can detect it at the directory level, print
477 # it once, and then suppress it for individual filepaths underneath.
480 # As of time of writing, git uses choice 5. Directory rename detection and
481 # rename detection performance improvements might make choice 6 a desirable
482 # improvement. But we can at least document where we fall short for now...
485 # Historically, this testcase also used:
486 # Commit E2: Merge B & C, deleting 'a' but keeping slightly modified 'a/file'
487 # The merge of D1 & E2 is very similar to D1 & E1 -- it has similar issues for
488 # path 'a', but should always result in a modify/delete conflict for path
489 # 'a/file'. These tests ran the two merges
492 # in both directions, to check for directional issues with D/F conflict
493 # handling. Later we added
497 # for good measure, though we only ran those one way because we had pretty
498 # good confidence in merge-recursive's directional handling of D/F issues.
500 # Just to summarize all the intermediate merge commits:
501 # Commit D1: Merge B & C, keeping a and deleting a/
502 # Commit D2: Merge B & C, renaming a->a2, keeping a/file
503 # Commit E1: Merge B & C, deleting a but keeping a/file
504 # Commit E2: Merge B & C, deleting a but keeping slightly modified a/file
505 # Commit E3: Merge B & C, keeping modified a, and deleting a/
506 # Commit E4: Merge B & C, modifying 'a' and renaming to 'a2', and deleting 'a/'
509 test_expect_success 'setup differently handled merges of directory/file conflict' '
510 test_create_repo directory-file &&
523 test_write_lines a b c d e f g >a/file &&
529 test_write_lines 1 2 3 4 5 6 7 >a &&
535 git merge -s ours -m D1 C^0 &&
539 test_must_fail git merge C^0 &&
543 git cat-file -p B:a >a2 &&
549 git merge -s ours -m E1 B^0 &&
553 git merge -s ours -m E2 B^0 &&
554 test_write_lines a b c d e f g h >a/file &&
556 git commit --amend -C HEAD &&
560 test_must_fail git merge B^0 &&
563 test_write_lines 1 2 3 4 5 6 7 8 >a &&
569 test_must_fail git merge B^0 &&
573 test_write_lines 1 2 3 4 5 6 7 8 >a2 &&
580 test_expect_success 'merge of D1 & E1 fails but has appropriate contents' '
581 test_when_finished "git -C directory-file reset --hard" &&
582 test_when_finished "git -C directory-file clean -fdqx" &&
588 test_must_fail git merge -s recursive E1^0 &&
590 git ls-files -s >out &&
591 test_line_count = 2 out &&
592 git ls-files -u >out &&
593 test_line_count = 1 out &&
594 git ls-files -o >out &&
595 test_line_count = 1 out &&
597 git rev-parse >expect \
599 git rev-parse >actual \
601 test_cmp expect actual
605 test_expect_success 'merge of E1 & D1 fails but has appropriate contents' '
606 test_when_finished "git -C directory-file reset --hard" &&
607 test_when_finished "git -C directory-file clean -fdqx" &&
613 test_must_fail git merge -s recursive D1^0 &&
615 git ls-files -s >out &&
616 test_line_count = 2 out &&
617 git ls-files -u >out &&
618 test_line_count = 1 out &&
619 git ls-files -o >out &&
620 test_line_count = 1 out &&
622 git rev-parse >expect \
624 git rev-parse >actual \
626 test_cmp expect actual
630 test_expect_success 'merge of D1 & E2 fails but has appropriate contents' '
631 test_when_finished "git -C directory-file reset --hard" &&
632 test_when_finished "git -C directory-file clean -fdqx" &&
638 test_must_fail git merge -s recursive E2^0 &&
640 git ls-files -s >out &&
641 test_line_count = 4 out &&
642 git ls-files -u >out &&
643 test_line_count = 3 out &&
644 git ls-files -o >out &&
645 test_line_count = 2 out &&
647 git rev-parse >expect \
648 B:a E2:a/file C:a/file A:ignore-me &&
649 git rev-parse >actual \
650 :2:a :3:a/file :1:a/file :0:ignore-me &&
651 test_cmp expect actual &&
653 test_path_is_file a~HEAD
657 test_expect_success 'merge of E2 & D1 fails but has appropriate contents' '
658 test_when_finished "git -C directory-file reset --hard" &&
659 test_when_finished "git -C directory-file clean -fdqx" &&
665 test_must_fail git merge -s recursive D1^0 &&
667 git ls-files -s >out &&
668 test_line_count = 4 out &&
669 git ls-files -u >out &&
670 test_line_count = 3 out &&
671 git ls-files -o >out &&
672 test_line_count = 2 out &&
674 git rev-parse >expect \
675 B:a E2:a/file C:a/file A:ignore-me &&
676 git rev-parse >actual \
677 :3:a :2:a/file :1:a/file :0:ignore-me &&
678 test_cmp expect actual &&
680 test_path_is_file a~D1^0
684 test_expect_success 'merge of D1 & E3 succeeds' '
685 test_when_finished "git -C directory-file reset --hard" &&
686 test_when_finished "git -C directory-file clean -fdqx" &&
692 git merge -s recursive E3^0 &&
694 git ls-files -s >out &&
695 test_line_count = 2 out &&
696 git ls-files -u >out &&
697 test_line_count = 0 out &&
698 git ls-files -o >out &&
699 test_line_count = 1 out &&
701 git rev-parse >expect \
703 git rev-parse >actual \
705 test_cmp expect actual
709 test_expect_success 'merge of D1 & E4 notifies user a and a2 are related' '
710 test_when_finished "git -C directory-file reset --hard" &&
711 test_when_finished "git -C directory-file clean -fdqx" &&
717 test_must_fail git merge -s recursive E4^0 &&
719 git ls-files -s >out &&
720 test_line_count = 4 out &&
721 git ls-files -u >out &&
722 test_line_count = 3 out &&
723 git ls-files -o >out &&
724 test_line_count = 1 out &&
726 git rev-parse >expect \
727 A:ignore-me B:a D1:a E4:a2 &&
728 git rev-parse >actual \
729 :0:ignore-me :1:a~Temporary\ merge\ branch\ 2 :2:a :3:a2 &&
730 test_cmp expect actual
734 test_expect_failure 'merge of D2 & E4 merges a2s & reports conflict for a/file' '
735 test_when_finished "git -C directory-file reset --hard" &&
736 test_when_finished "git -C directory-file clean -fdqx" &&
742 test_must_fail git merge -s recursive E4^0 &&
744 git ls-files -s >out &&
745 test_line_count = 3 out &&
746 git ls-files -u >out &&
747 test_line_count = 1 out &&
748 git ls-files -o >out &&
749 test_line_count = 1 out &&
751 git rev-parse >expect \
752 A:ignore-me E4:a2 D2:a/file &&
753 git rev-parse >actual \
754 :0:ignore-me :0:a2 :2:a/file &&
755 test_cmp expect actual
760 # criss-cross with rename/rename(1to2)/modify followed by
761 # rename/rename(2to1)/modify:
771 # Commit A: new file: a
772 # Commit B: rename a->b, modifying by adding a line
773 # Commit C: rename a->c
774 # Commit D: merge B&C, resolving conflict by keeping contents in newname
775 # Commit E: merge B&C, resolving conflict similar to D but adding another line
777 # There is a conflict merging B & C, but one of filename not of file
778 # content. Whoever created D and E chose specific resolutions for that
779 # conflict resolution. Now, since: (1) there is no content conflict
780 # merging B & C, (2) D does not modify that merged content further, and (3)
781 # both D & E resolve the name conflict in the same way, the modification to
782 # newname in E should not cause any conflicts when it is merged with D.
783 # (Note that this can be accomplished by having the virtual merge base have
784 # the merged contents of b and c stored in a file named a, which seems like
785 # the most logical choice anyway.)
787 # Comment from Junio: I do not necessarily agree with the choice "a", but
788 # it feels sound to say "B and C do not agree what the final pathname
789 # should be, but we know this content was derived from the common A:a so we
790 # use one path whose name is arbitrary in the virtual merge base X between
791 # D and E" and then further let the rename detection to notice that that
792 # arbitrary path gets renamed between X-D to "newname" and X-E also to
793 # "newname" to resolve it as both sides renaming it to the same new
794 # name. It is akin to what we do at the content level, i.e. "B and C do not
795 # agree what the final contents should be, so we leave the conflict marker
796 # but that may cancel out at the final merge stage".
798 test_expect_success 'setup rename/rename(1to2)/modify followed by what looks like rename/rename(2to1)/modify' '
799 test_create_repo rename-squared-squared &&
801 cd rename-squared-squared &&
803 printf "1\n2\n3\n4\n5\n6\n" >a &&
808 git checkout -b B A &&
814 git checkout -b C A &&
818 git checkout -q B^0 &&
819 git merge --no-commit -s ours C^0 &&
821 git commit -m "Merge commit C^0 into HEAD" &&
824 git checkout -q C^0 &&
825 git merge --no-commit -s ours B^0 &&
827 printf "7\n8\n" >>newname &&
829 git commit -m "Merge commit B^0 into HEAD" &&
834 test_expect_success 'handle rename/rename(1to2)/modify followed by what looks like rename/rename(2to1)/modify' '
836 cd rename-squared-squared &&
840 git merge -s recursive E^0 &&
842 git ls-files -s >out &&
843 test_line_count = 1 out &&
844 git ls-files -u >out &&
845 test_line_count = 0 out &&
846 git ls-files -o >out &&
847 test_line_count = 1 out &&
849 test $(git rev-parse HEAD:newname) = $(git rev-parse E:newname)
854 # criss-cross with rename/rename(1to2)/add-source + resolvable modify/modify:
864 # Commit A: new file: a
865 # Commit B: rename a->b
866 # Commit C: rename a->c, add different a
867 # Commit D: merge B&C, keeping b&c and (new) a modified at beginning
868 # Commit E: merge B&C, keeping b&c and (new) a modified at end
870 # Merging commits D & E should result in no conflict; doing so correctly
871 # requires getting the virtual merge base (from merging B&C) right, handling
872 # renaming carefully (both in the virtual merge base and later), and getting
873 # content merge handled.
875 test_expect_success 'setup criss-cross + rename/rename/add-source + modify/modify' '
876 test_create_repo rename-rename-add-source &&
878 cd rename-rename-add-source &&
880 printf "lots\nof\nwords\nand\ncontent\n" >a &&
885 git checkout -b B A &&
889 git checkout -b C A &&
891 printf "2\n3\n4\n5\n6\n7\n" >a &&
896 git merge --no-commit -s ours C^0 &&
897 git checkout C -- a c &&
903 git commit -m "Merge commit C^0 into HEAD" &&
907 git merge --no-commit -s ours B^0 &&
908 git checkout B -- b &&
911 git commit -m "Merge commit B^0 into HEAD" &&
916 test_expect_failure 'detect rename/rename/add-source for virtual merge-base' '
918 cd rename-rename-add-source &&
922 git merge -s recursive E^0 &&
924 git ls-files -s >out &&
925 test_line_count = 3 out &&
926 git ls-files -u >out &&
927 test_line_count = 0 out &&
928 git ls-files -o >out &&
929 test_line_count = 1 out &&
931 printf "1\n2\n3\n4\n5\n6\n7\n8\n" >correct &&
932 git rev-parse >expect \
935 git rev-parse >actual \
937 git hash-object >>actual \
939 test_cmp expect actual
944 # criss-cross with rename/rename(1to2)/add-dest + simple modify:
954 # Commit A: new file: a
955 # Commit B: rename a->b, add c
956 # Commit C: rename a->c
957 # Commit D: merge B&C, keeping A:a and B:c
958 # Commit E: merge B&C, keeping A:a and slightly modified c from B
960 # Merging commits D & E should result in no conflict. The virtual merge
961 # base of B & C needs to not delete B:c for that to work, though...
963 test_expect_success 'setup criss-cross+rename/rename/add-dest + simple modify' '
964 test_create_repo rename-rename-add-dest &&
966 cd rename-rename-add-dest &&
973 git checkout -b B A &&
975 printf "1\n2\n3\n4\n5\n6\n7\n" >c &&
979 git checkout -b C A &&
984 git merge --no-commit -s ours C^0 &&
986 git commit -m "D is like B but renames b back to a" &&
990 git merge --no-commit -s ours C^0 &&
994 git commit -m "E like D but has mod in c" &&
999 test_expect_success 'virtual merge base handles rename/rename(1to2)/add-dest' '
1001 cd rename-rename-add-dest &&
1005 git merge -s recursive E^0 &&
1007 git ls-files -s >out &&
1008 test_line_count = 2 out &&
1009 git ls-files -u >out &&
1010 test_line_count = 0 out &&
1011 git ls-files -o >out &&
1012 test_line_count = 1 out &&
1014 git rev-parse >expect \
1016 git rev-parse >actual \
1018 test_cmp expect actual
1023 # criss-cross with modify/modify on a symlink:
1033 # Commit A: simple simlink fickle->lagoon
1034 # Commit B: redirect fickle->disneyland
1035 # Commit C: redirect fickle->home
1036 # Commit D: merge B&C, resolving in favor of B
1037 # Commit E: merge B&C, resolving in favor of C
1039 # This is an obvious modify/modify conflict for the symlink 'fickle'. Can
1042 test_expect_success 'setup symlink modify/modify' '
1043 test_create_repo symlink-modify-modify &&
1045 cd symlink-modify-modify &&
1047 test_ln_s_add lagoon fickle &&
1051 git checkout -b B A &&
1053 test_ln_s_add disneyland fickle &&
1056 git checkout -b C A &&
1058 test_ln_s_add home fickle &&
1062 git checkout -q B^0 &&
1063 git merge -s ours -m D C^0 &&
1066 git checkout -q C^0 &&
1067 git merge -s ours -m E B^0 &&
1072 test_expect_failure 'check symlink modify/modify' '
1074 cd symlink-modify-modify &&
1078 test_must_fail git merge -s recursive E^0 &&
1080 git ls-files -s >out &&
1081 test_line_count = 3 out &&
1082 git ls-files -u >out &&
1083 test_line_count = 3 out &&
1084 git ls-files -o >out &&
1085 test_line_count = 1 out
1090 # criss-cross with add/add of a symlink:
1100 # Commit A: No symlink or path exists yet
1101 # Commit B: set up symlink: fickle->disneyland
1102 # Commit C: set up symlink: fickle->home
1103 # Commit D: merge B&C, resolving in favor of B
1104 # Commit E: merge B&C, resolving in favor of C
1106 # This is an obvious add/add conflict for the symlink 'fickle'. Can
1109 test_expect_success 'setup symlink add/add' '
1110 test_create_repo symlink-add-add &&
1112 cd symlink-add-add &&
1119 git checkout -b B A &&
1120 test_ln_s_add disneyland fickle &&
1123 git checkout -b C A &&
1124 test_ln_s_add home fickle &&
1128 git checkout -q B^0 &&
1129 git merge -s ours -m D C^0 &&
1132 git checkout -q C^0 &&
1133 git merge -s ours -m E B^0 &&
1138 test_expect_failure 'check symlink add/add' '
1140 cd symlink-add-add &&
1144 test_must_fail git merge -s recursive E^0 &&
1146 git ls-files -s >out &&
1147 test_line_count = 3 out &&
1148 git ls-files -u >out &&
1149 test_line_count = 2 out &&
1150 git ls-files -o >out &&
1151 test_line_count = 1 out
1156 # criss-cross with modify/modify on a submodule:
1166 # Commit A: simple submodule repo
1167 # Commit B: update repo
1168 # Commit C: update repo differently
1169 # Commit D: merge B&C, resolving in favor of B
1170 # Commit E: merge B&C, resolving in favor of C
1172 # This is an obvious modify/modify conflict for the submodule 'repo'. Can
1175 test_expect_success 'setup submodule modify/modify' '
1176 test_create_repo submodule-modify-modify &&
1178 cd submodule-modify-modify &&
1180 test_create_repo submod &&
1188 git checkout -b B A &&
1194 git checkout -b C A &&
1201 git -C submod reset --hard A &&
1206 git checkout -b B A &&
1207 git -C submod reset --hard B &&
1211 git checkout -b C A &&
1212 git -C submod reset --hard C &&
1216 git checkout -q B^0 &&
1217 git merge -s ours -m D C^0 &&
1220 git checkout -q C^0 &&
1221 git merge -s ours -m E B^0 &&
1226 test_expect_failure 'check submodule modify/modify' '
1228 cd submodule-modify-modify &&
1232 test_must_fail git merge -s recursive E^0 &&
1234 git ls-files -s >out &&
1235 test_line_count = 3 out &&
1236 git ls-files -u >out &&
1237 test_line_count = 3 out &&
1238 git ls-files -o >out &&
1239 test_line_count = 1 out
1244 # criss-cross with add/add on a submodule:
1254 # Commit A: nothing of note
1255 # Commit B: introduce submodule repo
1256 # Commit C: introduce submodule repo at different commit
1257 # Commit D: merge B&C, resolving in favor of B
1258 # Commit E: merge B&C, resolving in favor of C
1260 # This is an obvious add/add conflict for the submodule 'repo'. Can
1263 test_expect_success 'setup submodule add/add' '
1264 test_create_repo submodule-add-add &&
1266 cd submodule-add-add &&
1268 test_create_repo submod &&
1276 git checkout -b B A &&
1282 git checkout -b C A &&
1289 touch irrelevant-file &&
1290 git add irrelevant-file &&
1294 git checkout -b B A &&
1295 git -C submod reset --hard B &&
1299 git checkout -b C A &&
1300 git -C submod reset --hard C &&
1304 git checkout -q B^0 &&
1305 git merge -s ours -m D C^0 &&
1308 git checkout -q C^0 &&
1309 git merge -s ours -m E B^0 &&
1314 test_expect_failure 'check submodule add/add' '
1316 cd submodule-add-add &&
1320 test_must_fail git merge -s recursive E^0 &&
1322 git ls-files -s >out &&
1323 test_line_count = 3 out &&
1324 git ls-files -u >out &&
1325 test_line_count = 2 out &&
1326 git ls-files -o >out &&
1327 test_line_count = 1 out
1332 # criss-cross with conflicting entry types:
1342 # Commit A: nothing of note
1343 # Commit B: introduce submodule 'path'
1344 # Commit C: introduce symlink 'path'
1345 # Commit D: merge B&C, resolving in favor of B
1346 # Commit E: merge B&C, resolving in favor of C
1348 # This is an obvious add/add conflict for 'path'. Can git detect it?
1350 test_expect_success 'setup conflicting entry types (submodule vs symlink)' '
1351 test_create_repo submodule-symlink-add-add &&
1353 cd submodule-symlink-add-add &&
1355 test_create_repo path &&
1364 touch irrelevant-file &&
1365 git add irrelevant-file &&
1369 git checkout -b B A &&
1370 git -C path reset --hard B &&
1374 git checkout -b C A &&
1376 test_ln_s_add irrelevant-file path &&
1379 git checkout -q B^0 &&
1380 git merge -s ours -m D C^0 &&
1383 git checkout -q C^0 &&
1384 git merge -s ours -m E B^0 &&
1389 test_expect_failure 'check conflicting entry types (submodule vs symlink)' '
1391 cd submodule-symlink-add-add &&
1395 test_must_fail git merge -s recursive E^0 &&
1397 git ls-files -s >out &&
1398 test_line_count = 3 out &&
1399 git ls-files -u >out &&
1400 test_line_count = 2 out &&
1401 git ls-files -o >out &&
1402 test_line_count = 1 out
1407 # criss-cross with regular files that have conflicting modes:
1417 # Commit A: nothing of note
1418 # Commit B: introduce file source_me.bash, not executable
1419 # Commit C: introduce file source_me.bash, executable
1420 # Commit D: merge B&C, resolving in favor of B
1421 # Commit E: merge B&C, resolving in favor of C
1423 # This is an obvious add/add mode conflict. Can git detect it?
1425 test_expect_success 'setup conflicting modes for regular file' '
1426 test_create_repo regular-file-mode-conflict &&
1428 cd regular-file-mode-conflict &&
1430 touch irrelevant-file &&
1431 git add irrelevant-file &&
1435 git checkout -b B A &&
1436 echo "command_to_run" >source_me.bash &&
1437 git add source_me.bash &&
1440 git checkout -b C A &&
1441 echo "command_to_run" >source_me.bash &&
1442 git add source_me.bash &&
1443 test_chmod +x source_me.bash &&
1446 git checkout -q B^0 &&
1447 git merge -s ours -m D C^0 &&
1450 git checkout -q C^0 &&
1451 git merge -s ours -m E B^0 &&
1456 test_expect_failure 'check conflicting modes for regular file' '
1458 cd regular-file-mode-conflict &&
1462 test_must_fail git merge -s recursive E^0 &&
1464 git ls-files -s >out &&
1465 test_line_count = 3 out &&
1466 git ls-files -u >out &&
1467 test_line_count = 2 out &&
1468 git ls-files -o >out &&
1469 test_line_count = 1 out
1481 # master has two files, named 'b' and 'a'
1482 # branches L1 and R1 both modify each of the two files in conflicting ways
1484 # L2 is a merge of R1 into L1; more on it later.
1485 # R2 is a merge of L1 into R1; more on it later.
1487 # X is an auto-generated merge-base used when merging L2 and R2.
1488 # since X is a merge of L1 and R1, it has conflicting versions of each file
1490 # More about L2 and R2:
1491 # - both resolve the conflicts in 'b' and 'a' differently
1492 # - L2 renames 'b' to 'm'
1493 # - R2 renames 'a' to 'm'
1495 # In the end, in file 'm' we have four different conflicting files (from
1496 # two versions of 'b' and two of 'a'). In addition, if
1497 # merge.conflictstyle is diff3, then the base version also has
1498 # conflict markers of its own, leading to a total of three levels of
1499 # conflict markers. This is a pretty weird corner case, but we just want
1500 # to ensure that we handle it as well as practical.
1502 test_expect_success 'setup nested conflicts' '
1503 test_create_repo nested_conflicts &&
1505 cd nested_conflicts &&
1507 # Create some related files now
1508 for i in $(test_seq 1 10)
1510 echo Random base content line $i
1522 test_write_lines b b_L1 >>b_L1 &&
1523 test_write_lines b b_R1 >>b_R1 &&
1524 test_write_lines b b_L2 >>b_L2 &&
1525 test_write_lines b b_R2 >>b_R2 &&
1526 test_write_lines a a_L1 >>a_L1 &&
1527 test_write_lines a a_R1 >>a_R1 &&
1528 test_write_lines a a_L2 >>a_L2 &&
1529 test_write_lines a a_R2 >>a_R2 &&
1531 # Setup original commit (or merge-base), consisting of
1532 # files named "b" and "a"
1538 test_tick && git commit -m initial &&
1543 # Handle the left side
1548 test_tick && git commit -m "version L1 of files" &&
1551 # Handle the right side
1556 test_tick && git commit -m "version R1 of files" &&
1559 # Create first merge on left side
1561 test_must_fail git merge R1 &&
1566 test_tick && git commit -m "left merge, rename b->m" &&
1569 # Create first merge on right side
1571 test_must_fail git merge L1 &&
1576 test_tick && git commit -m "right merge, rename a->m" &&
1581 test_expect_success 'check nested conflicts' '
1583 cd nested_conflicts &&
1586 MASTER=$(git rev-parse --short master) &&
1587 git checkout L2^0 &&
1589 # Merge must fail; there is a conflict
1590 test_must_fail git -c merge.conflictstyle=diff3 merge -s recursive R2^0 &&
1592 # Make sure the index has the right number of entries
1593 git ls-files -s >out &&
1594 test_line_count = 2 out &&
1595 git ls-files -u >out &&
1596 test_line_count = 2 out &&
1597 # Ensure we have the correct number of untracked files
1598 git ls-files -o >out &&
1599 test_line_count = 1 out &&
1601 # Create a and b from virtual merge base X
1602 git cat-file -p master:a >base &&
1603 git cat-file -p L1:a >ours &&
1604 git cat-file -p R1:a >theirs &&
1605 test_must_fail git merge-file --diff3 \
1606 -L "Temporary merge branch 1" \
1608 -L "Temporary merge branch 2" \
1612 sed -e "s/^\([<|=>]\)/\1\1/" ours >vmb_a &&
1614 git cat-file -p master:b >base &&
1615 git cat-file -p L1:b >ours &&
1616 git cat-file -p R1:b >theirs &&
1617 test_must_fail git merge-file --diff3 \
1618 -L "Temporary merge branch 1" \
1620 -L "Temporary merge branch 2" \
1624 sed -e "s/^\([<|=>]\)/\1\1/" ours >vmb_b &&
1626 # Compare :2:m to expected values
1627 git cat-file -p L2:m >ours &&
1628 git cat-file -p R2:b >theirs &&
1629 test_must_fail git merge-file --diff3 \
1631 -L "merged common ancestors:b" \
1636 sed -e "s/^\([<|=>]\)/\1\1/" ours >m_stage_2 &&
1637 git cat-file -p :2:m >actual &&
1638 test_cmp m_stage_2 actual &&
1640 # Compare :3:m to expected values
1641 git cat-file -p L2:a >ours &&
1642 git cat-file -p R2:m >theirs &&
1643 test_must_fail git merge-file --diff3 \
1645 -L "merged common ancestors:a" \
1650 sed -e "s/^\([<|=>]\)/\1\1/" ours >m_stage_3 &&
1651 git cat-file -p :3:m >actual &&
1652 test_cmp m_stage_3 actual &&
1654 # Compare m to expected contents
1656 cp m_stage_2 expected_final_m &&
1657 test_must_fail git merge-file --diff3 \
1659 -L "merged common ancestors" \
1664 test_cmp expected_final_m m
1676 # master has one file named 'content'
1677 # branches L1 and R1 both modify each of the two files in conflicting ways
1679 # L<n> (n>1) is a merge of R<n-1> into L<n-1>
1680 # R<n> (n>1) is a merge of L<n-1> into R<n-1>
1681 # L<n> and R<n> resolve the conflicts differently.
1683 # X<n> is an auto-generated merge-base used when merging L<n+1> and R<n+1>.
1684 # By construction, X1 has conflict markers due to conflicting versions.
1685 # X2, due to using merge.conflictstyle=3, has nested conflict markers.
1687 # So, merging R3 into L3 using merge.conflictstyle=3 should show the
1688 # nested conflict markers from X2 in the base version -- that means we
1689 # have three levels of conflict markers. Can we distinguish all three?
1691 test_expect_success 'setup virtual merge base with nested conflicts' '
1692 test_create_repo virtual_merge_base_has_nested_conflicts &&
1694 cd virtual_merge_base_has_nested_conflicts &&
1696 # Create some related files now
1697 for i in $(test_seq 1 10)
1699 echo Random base content line $i
1702 # Setup original commit
1704 test_tick && git commit -m initial &&
1711 echo left >>content &&
1713 test_tick && git commit -m "version L1 of content" &&
1718 echo right >>content &&
1720 test_tick && git commit -m "version R1 of content" &&
1725 test_must_fail git -c merge.conflictstyle=diff3 merge R1 &&
1726 git checkout L1 content &&
1727 test_tick && git commit -m "version L2 of content" &&
1732 test_must_fail git -c merge.conflictstyle=diff3 merge L1 &&
1733 git checkout R1 content &&
1734 test_tick && git commit -m "version R2 of content" &&
1739 test_must_fail git -c merge.conflictstyle=diff3 merge R2 &&
1740 git checkout L1 content &&
1741 test_tick && git commit -m "version L3 of content" &&
1746 test_must_fail git -c merge.conflictstyle=diff3 merge L2 &&
1747 git checkout R1 content &&
1748 test_tick && git commit -m "version R3 of content" &&
1753 test_expect_success 'check virtual merge base with nested conflicts' '
1755 cd virtual_merge_base_has_nested_conflicts &&
1757 MASTER=$(git rev-parse --short master) &&
1758 git checkout L3^0 &&
1760 # Merge must fail; there is a conflict
1761 test_must_fail git -c merge.conflictstyle=diff3 merge -s recursive R3^0 &&
1763 # Make sure the index has the right number of entries
1764 git ls-files -s >out &&
1765 test_line_count = 3 out &&
1766 git ls-files -u >out &&
1767 test_line_count = 3 out &&
1768 # Ensure we have the correct number of untracked files
1769 git ls-files -o >out &&
1770 test_line_count = 1 out &&
1772 # Compare :[23]:content to expected values
1773 git rev-parse L1:content R1:content >expect &&
1774 git rev-parse :2:content :3:content >actual &&
1775 test_cmp expect actual &&
1777 # Imitate X1 merge base, except without long enough conflict
1778 # markers because a subsequent sed will modify them. Put
1780 git cat-file -p master:content >base &&
1781 git cat-file -p L:content >left &&
1782 git cat-file -p R:content >right &&
1783 cp left merged-once &&
1784 test_must_fail git merge-file --diff3 \
1785 -L "Temporary merge branch 1" \
1787 -L "Temporary merge branch 2" \
1791 sed -e "s/^\([<|=>]\)/\1\1\1/" merged-once >vmb &&
1793 # Imitate X2 merge base, overwriting vmb. Note that we
1794 # extend both sets of conflict markers to make them longer
1795 # with the sed command.
1796 cp left merged-twice &&
1797 test_must_fail git merge-file --diff3 \
1798 -L "Temporary merge branch 1" \
1799 -L "merged common ancestors" \
1800 -L "Temporary merge branch 2" \
1804 sed -e "s/^\([<|=>]\)/\1\1\1/" merged-twice >vmb &&
1806 # Compare :1:content to expected value
1807 git cat-file -p :1:content >actual &&
1808 test_cmp vmb actual &&
1810 # Determine expected content in final outer merge, compare to
1811 # what the merge generated.
1812 cp -f left expect &&
1813 test_must_fail git merge-file --diff3 \
1814 -L "HEAD" -L "merged common ancestors" -L "R3^0" \
1816 test_cmp expect content