ff641b348a1bacc54fc7c582f4ae0881446a6827
[git/git.git] / t / t3030-merge-recursive.sh
1 #!/bin/sh
2
3 test_description='merge-recursive backend test'
4
5 . ./test-lib.sh
6
7 test_expect_success 'setup 1' '
8
9 echo hello >a &&
10 o0=$(git hash-object a) &&
11 cp a b &&
12 cp a c &&
13 mkdir d &&
14 cp a d/e &&
15
16 test_tick &&
17 git add a b c d/e &&
18 git commit -m initial &&
19 c0=$(git rev-parse --verify HEAD) &&
20 git branch side &&
21 git branch df-1 &&
22 git branch df-2 &&
23 git branch df-3 &&
24 git branch remove &&
25 git branch submod &&
26 git branch copy &&
27 git branch rename &&
28 git branch rename-ln &&
29
30 echo hello >>a &&
31 cp a d/e &&
32 o1=$(git hash-object a) &&
33
34 git add a d/e &&
35
36 test_tick &&
37 git commit -m "master modifies a and d/e" &&
38 c1=$(git rev-parse --verify HEAD) &&
39 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
40 (
41 echo "100644 blob $o1 a" &&
42 echo "100644 blob $o0 b" &&
43 echo "100644 blob $o0 c" &&
44 echo "100644 blob $o1 d/e" &&
45 echo "100644 $o1 0 a" &&
46 echo "100644 $o0 0 b" &&
47 echo "100644 $o0 0 c" &&
48 echo "100644 $o1 0 d/e"
49 ) >expected &&
50 test_cmp expected actual
51 '
52
53 test_expect_success 'setup 2' '
54
55 rm -rf [abcd] &&
56 git checkout side &&
57 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
58 (
59 echo "100644 blob $o0 a" &&
60 echo "100644 blob $o0 b" &&
61 echo "100644 blob $o0 c" &&
62 echo "100644 blob $o0 d/e" &&
63 echo "100644 $o0 0 a" &&
64 echo "100644 $o0 0 b" &&
65 echo "100644 $o0 0 c" &&
66 echo "100644 $o0 0 d/e"
67 ) >expected &&
68 test_cmp expected actual &&
69
70 echo goodbye >>a &&
71 o2=$(git hash-object a) &&
72
73 git add a &&
74
75 test_tick &&
76 git commit -m "side modifies a" &&
77 c2=$(git rev-parse --verify HEAD) &&
78 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
79 (
80 echo "100644 blob $o2 a" &&
81 echo "100644 blob $o0 b" &&
82 echo "100644 blob $o0 c" &&
83 echo "100644 blob $o0 d/e" &&
84 echo "100644 $o2 0 a" &&
85 echo "100644 $o0 0 b" &&
86 echo "100644 $o0 0 c" &&
87 echo "100644 $o0 0 d/e"
88 ) >expected &&
89 test_cmp expected actual
90 '
91
92 test_expect_success 'setup 3' '
93
94 rm -rf [abcd] &&
95 git checkout df-1 &&
96 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
97 (
98 echo "100644 blob $o0 a" &&
99 echo "100644 blob $o0 b" &&
100 echo "100644 blob $o0 c" &&
101 echo "100644 blob $o0 d/e" &&
102 echo "100644 $o0 0 a" &&
103 echo "100644 $o0 0 b" &&
104 echo "100644 $o0 0 c" &&
105 echo "100644 $o0 0 d/e"
106 ) >expected &&
107 test_cmp expected actual &&
108
109 rm -f b && mkdir b && echo df-1 >b/c && git add b/c &&
110 o3=$(git hash-object b/c) &&
111
112 test_tick &&
113 git commit -m "df-1 makes b/c" &&
114 c3=$(git rev-parse --verify HEAD) &&
115 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
116 (
117 echo "100644 blob $o0 a" &&
118 echo "100644 blob $o3 b/c" &&
119 echo "100644 blob $o0 c" &&
120 echo "100644 blob $o0 d/e" &&
121 echo "100644 $o0 0 a" &&
122 echo "100644 $o3 0 b/c" &&
123 echo "100644 $o0 0 c" &&
124 echo "100644 $o0 0 d/e"
125 ) >expected &&
126 test_cmp expected actual
127 '
128
129 test_expect_success 'setup 4' '
130
131 rm -rf [abcd] &&
132 git checkout df-2 &&
133 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
134 (
135 echo "100644 blob $o0 a" &&
136 echo "100644 blob $o0 b" &&
137 echo "100644 blob $o0 c" &&
138 echo "100644 blob $o0 d/e" &&
139 echo "100644 $o0 0 a" &&
140 echo "100644 $o0 0 b" &&
141 echo "100644 $o0 0 c" &&
142 echo "100644 $o0 0 d/e"
143 ) >expected &&
144 test_cmp expected actual &&
145
146 rm -f a && mkdir a && echo df-2 >a/c && git add a/c &&
147 o4=$(git hash-object a/c) &&
148
149 test_tick &&
150 git commit -m "df-2 makes a/c" &&
151 c4=$(git rev-parse --verify HEAD) &&
152 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
153 (
154 echo "100644 blob $o4 a/c" &&
155 echo "100644 blob $o0 b" &&
156 echo "100644 blob $o0 c" &&
157 echo "100644 blob $o0 d/e" &&
158 echo "100644 $o4 0 a/c" &&
159 echo "100644 $o0 0 b" &&
160 echo "100644 $o0 0 c" &&
161 echo "100644 $o0 0 d/e"
162 ) >expected &&
163 test_cmp expected actual
164 '
165
166 test_expect_success 'setup 5' '
167
168 rm -rf [abcd] &&
169 git checkout remove &&
170 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
171 (
172 echo "100644 blob $o0 a" &&
173 echo "100644 blob $o0 b" &&
174 echo "100644 blob $o0 c" &&
175 echo "100644 blob $o0 d/e" &&
176 echo "100644 $o0 0 a" &&
177 echo "100644 $o0 0 b" &&
178 echo "100644 $o0 0 c" &&
179 echo "100644 $o0 0 d/e"
180 ) >expected &&
181 test_cmp expected actual &&
182
183 rm -f b &&
184 echo remove-conflict >a &&
185
186 git add a &&
187 git rm b &&
188 o5=$(git hash-object a) &&
189
190 test_tick &&
191 git commit -m "remove removes b and modifies a" &&
192 c5=$(git rev-parse --verify HEAD) &&
193 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
194 (
195 echo "100644 blob $o5 a" &&
196 echo "100644 blob $o0 c" &&
197 echo "100644 blob $o0 d/e" &&
198 echo "100644 $o5 0 a" &&
199 echo "100644 $o0 0 c" &&
200 echo "100644 $o0 0 d/e"
201 ) >expected &&
202 test_cmp expected actual
203
204 '
205
206 test_expect_success 'setup 6' '
207
208 rm -rf [abcd] &&
209 git checkout df-3 &&
210 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
211 (
212 echo "100644 blob $o0 a" &&
213 echo "100644 blob $o0 b" &&
214 echo "100644 blob $o0 c" &&
215 echo "100644 blob $o0 d/e" &&
216 echo "100644 $o0 0 a" &&
217 echo "100644 $o0 0 b" &&
218 echo "100644 $o0 0 c" &&
219 echo "100644 $o0 0 d/e"
220 ) >expected &&
221 test_cmp expected actual &&
222
223 rm -fr d && echo df-3 >d && git add d &&
224 o6=$(git hash-object d) &&
225
226 test_tick &&
227 git commit -m "df-3 makes d" &&
228 c6=$(git rev-parse --verify HEAD) &&
229 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
230 (
231 echo "100644 blob $o0 a" &&
232 echo "100644 blob $o0 b" &&
233 echo "100644 blob $o0 c" &&
234 echo "100644 blob $o6 d" &&
235 echo "100644 $o0 0 a" &&
236 echo "100644 $o0 0 b" &&
237 echo "100644 $o0 0 c" &&
238 echo "100644 $o6 0 d"
239 ) >expected &&
240 test_cmp expected actual
241 '
242
243 test_expect_success 'setup 7' '
244
245 git checkout submod &&
246 git rm d/e &&
247 test_tick &&
248 git commit -m "remove d/e" &&
249 git update-index --add --cacheinfo 160000 $c1 d &&
250 test_tick &&
251 git commit -m "make d/ a submodule"
252 '
253
254 test_expect_success 'setup 8' '
255 git checkout rename &&
256 git mv a e &&
257 git add e &&
258 test_tick &&
259 git commit -m "rename a->e" &&
260 c7=$(git rev-parse --verify HEAD) &&
261 git checkout rename-ln &&
262 git mv a e &&
263 test_ln_s_add e a &&
264 test_tick &&
265 git commit -m "rename a->e, symlink a->e" &&
266 oln=$(printf e | git hash-object --stdin)
267 '
268
269 test_expect_success 'setup 9' '
270 git checkout copy &&
271 cp a e &&
272 git add e &&
273 test_tick &&
274 git commit -m "copy a->e"
275 '
276
277 test_expect_success 'merge-recursive simple' '
278
279 rm -fr [abcd] &&
280 git checkout -f "$c2" &&
281
282 test_expect_code 1 git merge-recursive "$c0" -- "$c2" "$c1"
283 '
284
285 test_expect_success 'merge-recursive result' '
286
287 git ls-files -s >actual &&
288 (
289 echo "100644 $o0 1 a" &&
290 echo "100644 $o2 2 a" &&
291 echo "100644 $o1 3 a" &&
292 echo "100644 $o0 0 b" &&
293 echo "100644 $o0 0 c" &&
294 echo "100644 $o1 0 d/e"
295 ) >expected &&
296 test_cmp expected actual
297
298 '
299
300 test_expect_success 'fail if the index has unresolved entries' '
301
302 rm -fr [abcd] &&
303 git checkout -f "$c1" &&
304
305 test_must_fail git merge "$c5" &&
306 test_must_fail git merge "$c5" 2> out &&
307 test_i18ngrep "not possible because you have unmerged files" out &&
308 git add -u &&
309 test_must_fail git merge "$c5" 2> out &&
310 test_i18ngrep "You have not concluded your merge" out &&
311 rm -f .git/MERGE_HEAD &&
312 test_must_fail git merge "$c5" 2> out &&
313 test_i18ngrep "Your local changes to the following files would be overwritten by merge:" out
314 '
315
316 test_expect_success 'merge-recursive remove conflict' '
317
318 rm -fr [abcd] &&
319 git checkout -f "$c1" &&
320
321 test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c5"
322 '
323
324 test_expect_success 'merge-recursive remove conflict' '
325
326 git ls-files -s >actual &&
327 (
328 echo "100644 $o0 1 a" &&
329 echo "100644 $o1 2 a" &&
330 echo "100644 $o5 3 a" &&
331 echo "100644 $o0 0 c" &&
332 echo "100644 $o1 0 d/e"
333 ) >expected &&
334 test_cmp expected actual
335
336 '
337
338 test_expect_success 'merge-recursive d/f simple' '
339 rm -fr [abcd] &&
340 git reset --hard &&
341 git checkout -f "$c1" &&
342
343 git merge-recursive "$c0" -- "$c1" "$c3"
344 '
345
346 test_expect_success 'merge-recursive result' '
347
348 git ls-files -s >actual &&
349 (
350 echo "100644 $o1 0 a" &&
351 echo "100644 $o3 0 b/c" &&
352 echo "100644 $o0 0 c" &&
353 echo "100644 $o1 0 d/e"
354 ) >expected &&
355 test_cmp expected actual
356
357 '
358
359 test_expect_success 'merge-recursive d/f conflict' '
360
361 rm -fr [abcd] &&
362 git reset --hard &&
363 git checkout -f "$c1" &&
364
365 test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c4"
366 '
367
368 test_expect_success 'merge-recursive d/f conflict result' '
369
370 git ls-files -s >actual &&
371 (
372 echo "100644 $o0 1 a" &&
373 echo "100644 $o1 2 a" &&
374 echo "100644 $o4 0 a/c" &&
375 echo "100644 $o0 0 b" &&
376 echo "100644 $o0 0 c" &&
377 echo "100644 $o1 0 d/e"
378 ) >expected &&
379 test_cmp expected actual
380
381 '
382
383 test_expect_success 'merge-recursive d/f conflict the other way' '
384
385 rm -fr [abcd] &&
386 git reset --hard &&
387 git checkout -f "$c4" &&
388
389 test_expect_code 1 git merge-recursive "$c0" -- "$c4" "$c1"
390 '
391
392 test_expect_success 'merge-recursive d/f conflict result the other way' '
393
394 git ls-files -s >actual &&
395 (
396 echo "100644 $o0 1 a" &&
397 echo "100644 $o1 3 a" &&
398 echo "100644 $o4 0 a/c" &&
399 echo "100644 $o0 0 b" &&
400 echo "100644 $o0 0 c" &&
401 echo "100644 $o1 0 d/e"
402 ) >expected &&
403 test_cmp expected actual
404
405 '
406
407 test_expect_success 'merge-recursive d/f conflict' '
408
409 rm -fr [abcd] &&
410 git reset --hard &&
411 git checkout -f "$c1" &&
412
413 test_expect_code 1 git merge-recursive "$c0" -- "$c1" "$c6"
414 '
415
416 test_expect_success 'merge-recursive d/f conflict result' '
417
418 git ls-files -s >actual &&
419 (
420 echo "100644 $o1 0 a" &&
421 echo "100644 $o0 0 b" &&
422 echo "100644 $o0 0 c" &&
423 echo "100644 $o6 3 d" &&
424 echo "100644 $o0 1 d/e" &&
425 echo "100644 $o1 2 d/e"
426 ) >expected &&
427 test_cmp expected actual
428
429 '
430
431 test_expect_success 'merge-recursive d/f conflict' '
432
433 rm -fr [abcd] &&
434 git reset --hard &&
435 git checkout -f "$c6" &&
436
437 test_expect_code 1 git merge-recursive "$c0" -- "$c6" "$c1"
438 '
439
440 test_expect_success 'merge-recursive d/f conflict result' '
441
442 git ls-files -s >actual &&
443 (
444 echo "100644 $o1 0 a" &&
445 echo "100644 $o0 0 b" &&
446 echo "100644 $o0 0 c" &&
447 echo "100644 $o6 2 d" &&
448 echo "100644 $o0 1 d/e" &&
449 echo "100644 $o1 3 d/e"
450 ) >expected &&
451 test_cmp expected actual
452
453 '
454
455 test_expect_success 'reset and 3-way merge' '
456
457 git reset --hard "$c2" &&
458 git read-tree -m "$c0" "$c2" "$c1"
459
460 '
461
462 test_expect_success 'reset and bind merge' '
463
464 git reset --hard master &&
465 git read-tree --prefix=M/ master &&
466 git ls-files -s >actual &&
467 (
468 echo "100644 $o1 0 M/a" &&
469 echo "100644 $o0 0 M/b" &&
470 echo "100644 $o0 0 M/c" &&
471 echo "100644 $o1 0 M/d/e" &&
472 echo "100644 $o1 0 a" &&
473 echo "100644 $o0 0 b" &&
474 echo "100644 $o0 0 c" &&
475 echo "100644 $o1 0 d/e"
476 ) >expected &&
477 test_cmp expected actual &&
478
479 git read-tree --prefix=a1/ master &&
480 git ls-files -s >actual &&
481 (
482 echo "100644 $o1 0 M/a" &&
483 echo "100644 $o0 0 M/b" &&
484 echo "100644 $o0 0 M/c" &&
485 echo "100644 $o1 0 M/d/e" &&
486 echo "100644 $o1 0 a" &&
487 echo "100644 $o1 0 a1/a" &&
488 echo "100644 $o0 0 a1/b" &&
489 echo "100644 $o0 0 a1/c" &&
490 echo "100644 $o1 0 a1/d/e" &&
491 echo "100644 $o0 0 b" &&
492 echo "100644 $o0 0 c" &&
493 echo "100644 $o1 0 d/e"
494 ) >expected &&
495 test_cmp expected actual &&
496
497 git read-tree --prefix=z/ master &&
498 git ls-files -s >actual &&
499 (
500 echo "100644 $o1 0 M/a" &&
501 echo "100644 $o0 0 M/b" &&
502 echo "100644 $o0 0 M/c" &&
503 echo "100644 $o1 0 M/d/e" &&
504 echo "100644 $o1 0 a" &&
505 echo "100644 $o1 0 a1/a" &&
506 echo "100644 $o0 0 a1/b" &&
507 echo "100644 $o0 0 a1/c" &&
508 echo "100644 $o1 0 a1/d/e" &&
509 echo "100644 $o0 0 b" &&
510 echo "100644 $o0 0 c" &&
511 echo "100644 $o1 0 d/e" &&
512 echo "100644 $o1 0 z/a" &&
513 echo "100644 $o0 0 z/b" &&
514 echo "100644 $o0 0 z/c" &&
515 echo "100644 $o1 0 z/d/e"
516 ) >expected &&
517 test_cmp expected actual
518
519 '
520
521 test_expect_success 'merge-recursive w/ empty work tree - ours has rename' '
522 (
523 GIT_WORK_TREE="$PWD/ours-has-rename-work" &&
524 export GIT_WORK_TREE &&
525 GIT_INDEX_FILE="$PWD/ours-has-rename-index" &&
526 export GIT_INDEX_FILE &&
527 mkdir "$GIT_WORK_TREE" &&
528 git read-tree -i -m $c7 2>actual-err &&
529 test_must_be_empty actual-err &&
530 git update-index --ignore-missing --refresh 2>actual-err &&
531 test_must_be_empty actual-err &&
532 git merge-recursive $c0 -- $c7 $c3 2>actual-err &&
533 test_must_be_empty actual-err &&
534 git ls-files -s >actual-files 2>actual-err &&
535 test_must_be_empty actual-err
536 ) &&
537 cat >expected-files <<-EOF &&
538 100644 $o3 0 b/c
539 100644 $o0 0 c
540 100644 $o0 0 d/e
541 100644 $o0 0 e
542 EOF
543 test_cmp expected-files actual-files
544 '
545
546 test_expect_success 'merge-recursive w/ empty work tree - theirs has rename' '
547 (
548 GIT_WORK_TREE="$PWD/theirs-has-rename-work" &&
549 export GIT_WORK_TREE &&
550 GIT_INDEX_FILE="$PWD/theirs-has-rename-index" &&
551 export GIT_INDEX_FILE &&
552 mkdir "$GIT_WORK_TREE" &&
553 git read-tree -i -m $c3 2>actual-err &&
554 test_must_be_empty actual-err &&
555 git update-index --ignore-missing --refresh 2>actual-err &&
556 test_must_be_empty actual-err &&
557 git merge-recursive $c0 -- $c3 $c7 2>actual-err &&
558 test_must_be_empty actual-err &&
559 git ls-files -s >actual-files 2>actual-err &&
560 test_must_be_empty actual-err
561 ) &&
562 cat >expected-files <<-EOF &&
563 100644 $o3 0 b/c
564 100644 $o0 0 c
565 100644 $o0 0 d/e
566 100644 $o0 0 e
567 EOF
568 test_cmp expected-files actual-files
569 '
570
571 test_expect_success 'merge removes empty directories' '
572
573 git reset --hard master &&
574 git checkout -b rm &&
575 git rm d/e &&
576 git commit -mremoved-d/e &&
577 git checkout master &&
578 git merge -s recursive rm &&
579 test_must_fail test -d d
580 '
581
582 test_expect_success 'merge-recursive simple w/submodule' '
583
584 git checkout submod &&
585 git merge remove
586 '
587
588 test_expect_success 'merge-recursive simple w/submodule result' '
589
590 git ls-files -s >actual &&
591 (
592 echo "100644 $o5 0 a" &&
593 echo "100644 $o0 0 c" &&
594 echo "160000 $c1 0 d"
595 ) >expected &&
596 test_cmp expected actual
597 '
598
599 test_expect_success 'merge-recursive copy vs. rename' '
600 git checkout -f copy &&
601 git merge rename &&
602 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
603 (
604 echo "100644 blob $o0 b" &&
605 echo "100644 blob $o0 c" &&
606 echo "100644 blob $o0 d/e" &&
607 echo "100644 blob $o0 e" &&
608 echo "100644 $o0 0 b" &&
609 echo "100644 $o0 0 c" &&
610 echo "100644 $o0 0 d/e" &&
611 echo "100644 $o0 0 e"
612 ) >expected &&
613 test_cmp expected actual
614 '
615
616 test_expect_failure 'merge-recursive rename vs. rename/symlink' '
617
618 git checkout -f rename &&
619 git merge rename-ln &&
620 ( git ls-tree -r HEAD && git ls-files -s ) >actual &&
621 (
622 echo "120000 blob $oln a" &&
623 echo "100644 blob $o0 b" &&
624 echo "100644 blob $o0 c" &&
625 echo "100644 blob $o0 d/e" &&
626 echo "100644 blob $o0 e" &&
627 echo "120000 $oln 0 a" &&
628 echo "100644 $o0 0 b" &&
629 echo "100644 $o0 0 c" &&
630 echo "100644 $o0 0 d/e" &&
631 echo "100644 $o0 0 e"
632 ) >expected &&
633 test_cmp expected actual
634 '
635
636 test_expect_success 'merging with triple rename across D/F conflict' '
637 git reset --hard HEAD &&
638 git checkout -b main &&
639 git rm -rf . &&
640
641 echo "just a file" >sub1 &&
642 mkdir -p sub2 &&
643 echo content1 >sub2/file1 &&
644 echo content2 >sub2/file2 &&
645 echo content3 >sub2/file3 &&
646 mkdir simple &&
647 echo base >simple/bar &&
648 git add -A &&
649 test_tick &&
650 git commit -m base &&
651
652 git checkout -b other &&
653 echo more >>simple/bar &&
654 test_tick &&
655 git commit -a -m changesimplefile &&
656
657 git checkout main &&
658 git rm sub1 &&
659 git mv sub2 sub1 &&
660 test_tick &&
661 git commit -m changefiletodir &&
662
663 test_tick &&
664 git merge other
665 '
666
667 test_expect_success 'merge-recursive remembers the names of all base trees' '
668 git reset --hard HEAD &&
669
670 # more trees than static slots used by oid_to_hex()
671 for commit in $c0 $c2 $c4 $c5 $c6 $c7
672 do
673 git rev-parse "$commit^{tree}"
674 done >trees &&
675
676 # ignore the return code -- it only fails because the input is weird
677 test_must_fail git -c merge.verbosity=5 merge-recursive $(cat trees) -- $c1 $c3 >out &&
678
679 # merge-recursive prints in reverse order, but we do not care
680 sort <trees >expect &&
681 sed -n "s/^virtual //p" out | sort >actual &&
682 test_cmp expect actual
683 '
684
685 test_expect_success 'merge-recursive internal merge resolves to the sameness' '
686 git reset --hard HEAD &&
687
688 # We are going to create a history leading to two criss-cross
689 # branches A and B. The common ancestor at the bottom, O0,
690 # has two child commits O1 and O2, both of which will be merge
691 # base between A and B, like so:
692 #
693 # O1---A
694 # / \ /
695 # O0 .
696 # \ / \
697 # O2---B
698 #
699 # The recently added "check to see if the index is different from
700 # the tree into which something else is getting merged" check must
701 # NOT kick in when an inner merge between O1 and O2 is made. Both
702 # O1 and O2 happen to have the same tree as O0 in this test to
703 # trigger the bug---whether the inner merge is made by merging O2
704 # into O1 or O1 into O2, their common ancestor O0 and the branch
705 # being merged have the same tree. We should not trigger the "is
706 # the index dirty?" check in this case.
707
708 echo "zero" >file &&
709 git add file &&
710 test_tick &&
711 git commit -m "O0" &&
712 O0=$(git rev-parse HEAD) &&
713
714 test_tick &&
715 git commit --allow-empty -m "O1" &&
716 O1=$(git rev-parse HEAD) &&
717
718 git reset --hard $O0 &&
719 test_tick &&
720 git commit --allow-empty -m "O2" &&
721 O2=$(git rev-parse HEAD) &&
722
723 test_tick &&
724 git merge -s ours $O1 &&
725 B=$(git rev-parse HEAD) &&
726
727 git reset --hard $O1 &&
728 test_tick &&
729 git merge -s ours $O2 &&
730 A=$(git rev-parse HEAD) &&
731
732 git merge $B
733 '
734
735 test_done