t/t4200-rerere.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2006 Johannes E. Schindelin
   4 #
   5
   6 test_description='git rerere
   7
   8 ! [fifth] version1
   9  ! [first] first
  10   ! [fourth] version1
  11    ! [main] initial
  12     ! [second] prefer first over second
  13      ! [third] version2
  14 ------
  15      + [third] version2
  16 +      [fifth] version1
  17   +    [fourth] version1
  18 + +  + [third^] third
  19     -  [second] prefer first over second
  20  +  +  [first] first
  21     +  [second^] second
  22 ++++++ [main] initial
  23 '
  24
  25 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
  26 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
  27
  28 . ./test-lib.sh
  29
  30 test_expect_success 'setup' '
  31         cat >a1 <<-\EOF &&
  32         Some title
  33         ==========
  34         Whether '\''tis nobler in the mind to suffer
  35         The slings and arrows of outrageous fortune,
  36         Or to take arms against a sea of troubles,
  37         And by opposing end them? To die: to sleep;
  38         No more; and by a sleep to say we end
  39         The heart-ache and the thousand natural shocks
  40         That flesh is heir to, '\''tis a consummation
  41         Devoutly to be wish'\''d.
  42         EOF
  43
  44         git add a1 &&
  45         test_tick &&
  46         git commit -q -a -m initial &&
  47
  48         cat >>a1 <<-\EOF &&
  49         Some title
  50         ==========
  51         To die, to sleep;
  52         To sleep: perchance to dream: ay, there'\''s the rub;
  53         For in that sleep of death what dreams may come
  54         When we have shuffled off this mortal coil,
  55         Must give us pause: there'\''s the respect
  56         That makes calamity of so long life;
  57         EOF
  58
  59         git checkout -b first &&
  60         test_tick &&
  61         git commit -q -a -m first &&
  62
  63         git checkout -b second main &&
  64         git show first:a1 |
  65         sed -e "s/To die, t/To die! T/" -e "s/Some title/Some Title/" >a1 &&
  66         echo "* END *" >>a1 &&
  67         test_tick &&
  68         git commit -q -a -m second
  69 '
  70
  71 test_expect_success 'nothing recorded without rerere' '
  72         rm -rf .git/rr-cache &&
  73         git config rerere.enabled false &&
  74         test_must_fail git merge first &&
  75         ! test -d .git/rr-cache
  76 '
  77
  78 test_expect_success 'activate rerere, old style (conflicting merge)' '
  79         git reset --hard &&
  80         mkdir .git/rr-cache &&
  81         test_might_fail git config --unset rerere.enabled &&
  82         test_must_fail git merge first &&
  83
  84         sha1=$(perl -pe "s/     .*//" .git/MERGE_RR) &&
  85         rr=.git/rr-cache/$sha1 &&
  86         grep "^=======\$" $rr/preimage &&
  87         ! test -f $rr/postimage &&
  88         ! test -f $rr/thisimage
  89 '
  90
  91 test_expect_success 'rerere.enabled works, too' '
  92         rm -rf .git/rr-cache &&
  93         git config rerere.enabled true &&
  94         git reset --hard &&
  95         test_must_fail git merge first &&
  96
  97         sha1=$(perl -pe "s/     .*//" .git/MERGE_RR) &&
  98         rr=.git/rr-cache/$sha1 &&
  99         grep ^=======$ $rr/preimage
 100 '
 101
 102 test_expect_success 'set up rr-cache' '
 103         rm -rf .git/rr-cache &&
 104         git config rerere.enabled true &&
 105         git reset --hard &&
 106         test_must_fail git merge first &&
 107         sha1=$(perl -pe "s/     .*//" .git/MERGE_RR) &&
 108         rr=.git/rr-cache/$sha1
 109 '
 110
 111 test_expect_success 'rr-cache looks sane' '
 112         # no postimage or thisimage yet
 113         ! test -f $rr/postimage &&
 114         ! test -f $rr/thisimage &&
 115
 116         # preimage has right number of lines
 117         cnt=$(sed -ne "/^<<<<<<</,/^>>>>>>>/p" $rr/preimage | wc -l) &&
 118         echo $cnt &&
 119         test $cnt = 13
 120 '
 121
 122 test_expect_success 'rerere diff' '
 123         git show first:a1 >a1 &&
 124         cat >expect <<-\EOF &&
 125         --- a/a1
 126         +++ b/a1
 127         @@ -1,4 +1,4 @@
 128         -Some Title
 129         +Some title
 130          ==========
 131          Whether '\''tis nobler in the mind to suffer
 132          The slings and arrows of outrageous fortune,
 133         @@ -8,21 +8,11 @@
 134          The heart-ache and the thousand natural shocks
 135          That flesh is heir to, '\''tis a consummation
 136          Devoutly to be wish'\''d.
 137         -<<<<<<<
 138         -Some Title
 139         -==========
 140         -To die! To sleep;
 141         -=======
 142          Some title
 143          ==========
 144          To die, to sleep;
 145         ->>>>>>>
 146          To sleep: perchance to dream: ay, there'\''s the rub;
 147          For in that sleep of death what dreams may come
 148          When we have shuffled off this mortal coil,
 149          Must give us pause: there'\''s the respect
 150          That makes calamity of so long life;
 151         -<<<<<<<
 152         -=======
 153         -* END *
 154         ->>>>>>>
 155         EOF
 156         git rerere diff >out &&
 157         test_cmp expect out
 158 '
 159
 160 test_expect_success 'rerere status' '
 161         echo a1 >expect &&
 162         git rerere status >out &&
 163         test_cmp expect out
 164 '
 165
 166 test_expect_success 'first postimage wins' '
 167         git show first:a1 | sed "s/To die: t/To die! T/" >expect &&
 168
 169         git commit -q -a -m "prefer first over second" &&
 170         test -f $rr/postimage &&
 171
 172         oldmtimepost=$(test-tool chmtime --get -60 $rr/postimage) &&
 173
 174         git checkout -b third main &&
 175         git show second^:a1 | sed "s/To die: t/To die! T/" >a1 &&
 176         git commit -q -a -m third &&
 177
 178         test_must_fail git merge first &&
 179         # rerere kicked in
 180         ! grep "^=======\$" a1 &&
 181         test_cmp expect a1
 182 '
 183
 184 test_expect_success 'rerere updates postimage timestamp' '
 185         newmtimepost=$(test-tool chmtime --get $rr/postimage) &&
 186         test $oldmtimepost -lt $newmtimepost
 187 '
 188
 189 test_expect_success 'rerere clear' '
 190         mv $rr/postimage .git/post-saved &&
 191         echo "$sha1     a1" | perl -pe "y/\012/\000/" >.git/MERGE_RR &&
 192         git rerere clear &&
 193         ! test -d $rr
 194 '
 195
 196 test_expect_success 'leftover directory' '
 197         git reset --hard &&
 198         mkdir -p $rr &&
 199         test_must_fail git merge first &&
 200         test -f $rr/preimage
 201 '
 202
 203 test_expect_success 'missing preimage' '
 204         git reset --hard &&
 205         mkdir -p $rr &&
 206         cp .git/post-saved $rr/postimage &&
 207         test_must_fail git merge first &&
 208         test -f $rr/preimage
 209 '
 210
 211 test_expect_success 'set up for garbage collection tests' '
 212         mkdir -p $rr &&
 213         echo Hello >$rr/preimage &&
 214         echo World >$rr/postimage &&
 215
 216         sha2=$(test_oid deadbeef) &&
 217         rr2=.git/rr-cache/$sha2 &&
 218         mkdir $rr2 &&
 219         echo Hello >$rr2/preimage &&
 220
 221         almost_15_days_ago=$((60-15*86400)) &&
 222         just_over_15_days_ago=$((-1-15*86400)) &&
 223         almost_60_days_ago=$((60-60*86400)) &&
 224         just_over_60_days_ago=$((-1-60*86400)) &&
 225
 226         test-tool chmtime =$just_over_60_days_ago $rr/preimage &&
 227         test-tool chmtime =$almost_60_days_ago $rr/postimage &&
 228         test-tool chmtime =$almost_15_days_ago $rr2/preimage
 229 '
 230
 231 test_expect_success 'gc preserves young or recently used records' '
 232         git rerere gc &&
 233         test -f $rr/preimage &&
 234         test -f $rr2/preimage
 235 '
 236
 237 test_expect_success 'old records rest in peace' '
 238         test-tool chmtime =$just_over_60_days_ago $rr/postimage &&
 239         test-tool chmtime =$just_over_15_days_ago $rr2/preimage &&
 240         git rerere gc &&
 241         ! test -f $rr/preimage &&
 242         ! test -f $rr2/preimage
 243 '
 244
 245 rerere_gc_custom_expiry_test () {
 246         five_days="$1" right_now="$2"
 247         test_expect_success "rerere gc with custom expiry ($five_days, $right_now)" '
 248                 rm -fr .git/rr-cache &&
 249                 rr=.git/rr-cache/$ZERO_OID &&
 250                 mkdir -p "$rr" &&
 251                 >"$rr/preimage" &&
 252                 >"$rr/postimage" &&
 253
 254                 two_days_ago=$((-2*86400)) &&
 255                 test-tool chmtime =$two_days_ago "$rr/preimage" &&
 256                 test-tool chmtime =$two_days_ago "$rr/postimage" &&
 257
 258                 find .git/rr-cache -type f | sort >original &&
 259
 260                 git -c "gc.rerereresolved=$five_days" \
 261                     -c "gc.rerereunresolved=$five_days" rerere gc &&
 262                 find .git/rr-cache -type f | sort >actual &&
 263                 test_cmp original actual &&
 264
 265                 git -c "gc.rerereresolved=$five_days" \
 266                     -c "gc.rerereunresolved=$right_now" rerere gc &&
 267                 find .git/rr-cache -type f | sort >actual &&
 268                 test_cmp original actual &&
 269
 270                 git -c "gc.rerereresolved=$right_now" \
 271                     -c "gc.rerereunresolved=$right_now" rerere gc &&
 272                 find .git/rr-cache -type f | sort >actual &&
 273                 test_must_be_empty actual
 274         '
 275 }
 276
 277 rerere_gc_custom_expiry_test 5 0
 278
 279 rerere_gc_custom_expiry_test 5.days.ago now
 280
 281 test_expect_success 'setup: file2 added differently in two branches' '
 282         git reset --hard &&
 283
 284         git checkout -b fourth &&
 285         echo Hallo >file2 &&
 286         git add file2 &&
 287         test_tick &&
 288         git commit -m version1 &&
 289
 290         git checkout third &&
 291         echo Bello >file2 &&
 292         git add file2 &&
 293         test_tick &&
 294         git commit -m version2 &&
 295
 296         test_must_fail git merge fourth &&
 297         echo Cello >file2 &&
 298         git add file2 &&
 299         git commit -m resolution
 300 '
 301
 302 test_expect_success 'resolution was recorded properly' '
 303         echo Cello >expected &&
 304
 305         git reset --hard HEAD~2 &&
 306         git checkout -b fifth &&
 307
 308         echo Hallo >file3 &&
 309         git add file3 &&
 310         test_tick &&
 311         git commit -m version1 &&
 312
 313         git checkout third &&
 314         echo Bello >file3 &&
 315         git add file3 &&
 316         test_tick &&
 317         git commit -m version2 &&
 318         git tag version2 &&
 319
 320         test_must_fail git merge fifth &&
 321         test_cmp expected file3 &&
 322         test_must_fail git update-index --refresh
 323 '
 324
 325 test_expect_success 'rerere.autoupdate' '
 326         git config rerere.autoupdate true &&
 327         git reset --hard &&
 328         git checkout version2 &&
 329         test_must_fail git merge fifth &&
 330         git update-index --refresh
 331 '
 332
 333 test_expect_success 'merge --rerere-autoupdate' '
 334         test_might_fail git config --unset rerere.autoupdate &&
 335         git reset --hard &&
 336         git checkout version2 &&
 337         test_must_fail git merge --rerere-autoupdate fifth &&
 338         git update-index --refresh
 339 '
 340
 341 test_expect_success 'merge --no-rerere-autoupdate' '
 342         headblob=$(git rev-parse version2:file3) &&
 343         mergeblob=$(git rev-parse fifth:file3) &&
 344         cat >expected <<-EOF &&
 345         100644 $headblob 2      file3
 346         100644 $mergeblob 3     file3
 347         EOF
 348
 349         git config rerere.autoupdate true &&
 350         git reset --hard &&
 351         git checkout version2 &&
 352         test_must_fail git merge --no-rerere-autoupdate fifth &&
 353         git ls-files -u >actual &&
 354         test_cmp expected actual
 355 '
 356
 357 test_expect_success 'set up an unresolved merge' '
 358         headblob=$(git rev-parse version2:file3) &&
 359         mergeblob=$(git rev-parse fifth:file3) &&
 360         cat >expected.unresolved <<-EOF &&
 361         100644 $headblob 2      file3
 362         100644 $mergeblob 3     file3
 363         EOF
 364
 365         test_might_fail git config --unset rerere.autoupdate &&
 366         git reset --hard &&
 367         git checkout version2 &&
 368         fifth=$(git rev-parse fifth) &&
 369         echo "$fifth            branch fifth of ." |
 370         git fmt-merge-msg >msg &&
 371         ancestor=$(git merge-base version2 fifth) &&
 372         test_must_fail git merge-recursive "$ancestor" -- HEAD fifth &&
 373
 374         git ls-files --stage >failedmerge &&
 375         cp file3 file3.conflict &&
 376
 377         git ls-files -u >actual &&
 378         test_cmp expected.unresolved actual
 379 '
 380
 381 test_expect_success 'explicit rerere' '
 382         test_might_fail git config --unset rerere.autoupdate &&
 383         git rm -fr --cached . &&
 384         git update-index --index-info <failedmerge &&
 385         cp file3.conflict file3 &&
 386         test_must_fail git update-index --refresh -q &&
 387
 388         git rerere &&
 389         git ls-files -u >actual &&
 390         test_cmp expected.unresolved actual
 391 '
 392
 393 test_expect_success 'explicit rerere with autoupdate' '
 394         git config rerere.autoupdate true &&
 395         git rm -fr --cached . &&
 396         git update-index --index-info <failedmerge &&
 397         cp file3.conflict file3 &&
 398         test_must_fail git update-index --refresh -q &&
 399
 400         git rerere &&
 401         git update-index --refresh
 402 '
 403
 404 test_expect_success 'explicit rerere --rerere-autoupdate overrides' '
 405         git config rerere.autoupdate false &&
 406         git rm -fr --cached . &&
 407         git update-index --index-info <failedmerge &&
 408         cp file3.conflict file3 &&
 409         git rerere &&
 410         git ls-files -u >actual1 &&
 411
 412         git rm -fr --cached . &&
 413         git update-index --index-info <failedmerge &&
 414         cp file3.conflict file3 &&
 415         git rerere --rerere-autoupdate &&
 416         git update-index --refresh &&
 417
 418         git rm -fr --cached . &&
 419         git update-index --index-info <failedmerge &&
 420         cp file3.conflict file3 &&
 421         git rerere --rerere-autoupdate --no-rerere-autoupdate &&
 422         git ls-files -u >actual2 &&
 423
 424         git rm -fr --cached . &&
 425         git update-index --index-info <failedmerge &&
 426         cp file3.conflict file3 &&
 427         git rerere --rerere-autoupdate --no-rerere-autoupdate --rerere-autoupdate &&
 428         git update-index --refresh &&
 429
 430         test_cmp expected.unresolved actual1 &&
 431         test_cmp expected.unresolved actual2
 432 '
 433
 434 test_expect_success 'rerere --no-no-rerere-autoupdate' '
 435         git rm -fr --cached . &&
 436         git update-index --index-info <failedmerge &&
 437         cp file3.conflict file3 &&
 438         test_must_fail git rerere --no-no-rerere-autoupdate 2>err &&
 439         test_i18ngrep [Uu]sage err &&
 440         test_must_fail git update-index --refresh
 441 '
 442
 443 test_expect_success 'rerere -h' '
 444         test_must_fail git rerere -h >help &&
 445         test_i18ngrep [Uu]sage help
 446 '
 447
 448 concat_insert () {
 449         last=$1
 450         shift
 451         cat early && printf "%s\n" "$@" && cat late "$last"
 452 }
 453
 454 count_pre_post () {
 455         find .git/rr-cache/ -type f -name "preimage*" >actual &&
 456         test_line_count = "$1" actual &&
 457         find .git/rr-cache/ -type f -name "postimage*" >actual &&
 458         test_line_count = "$2" actual
 459 }
 460
 461 merge_conflict_resolve () {
 462         git reset --hard &&
 463         test_must_fail git merge six.1 &&
 464         # Resolution is to replace 7 with 6.1 and 6.2 (i.e. take both)
 465         concat_insert short 6.1 6.2 >file1 &&
 466         concat_insert long 6.1 6.2 >file2
 467 }
 468
 469 test_expect_success 'multiple identical conflicts' '
 470         rm -fr .git/rr-cache &&
 471         mkdir .git/rr-cache &&
 472         git reset --hard &&
 473
 474         test_seq 1 6 >early &&
 475         >late &&
 476         test_seq 11 15 >short &&
 477         test_seq 111 120 >long &&
 478         concat_insert short >file1 &&
 479         concat_insert long >file2 &&
 480         git add file1 file2 &&
 481         git commit -m base &&
 482         git tag base &&
 483         git checkout -b six.1 &&
 484         concat_insert short 6.1 >file1 &&
 485         concat_insert long 6.1 >file2 &&
 486         git add file1 file2 &&
 487         git commit -m 6.1 &&
 488         git checkout -b six.2 HEAD^ &&
 489         concat_insert short 6.2 >file1 &&
 490         concat_insert long 6.2 >file2 &&
 491         git add file1 file2 &&
 492         git commit -m 6.2 &&
 493
 494         # At this point, six.1 and six.2
 495         # - derive from common ancestor that has two files
 496         #   1...6 7 11..15 (file1) and 1...6 7 111..120 (file2)
 497         # - six.1 replaces these 7s with 6.1
 498         # - six.2 replaces these 7s with 6.2
 499
 500         merge_conflict_resolve &&
 501
 502         # Check that rerere knows that file1 and file2 have conflicts
 503
 504         printf "%s\n" file1 file2 >expect &&
 505         git ls-files -u | sed -e "s/^.* //" | sort -u >actual &&
 506         test_cmp expect actual &&
 507
 508         git rerere status | sort >actual &&
 509         test_cmp expect actual &&
 510
 511         git rerere remaining >actual &&
 512         test_cmp expect actual &&
 513
 514         count_pre_post 2 0 &&
 515
 516         # Pretend that the conflicts were made quite some time ago
 517         test-tool chmtime -172800 $(find .git/rr-cache/ -type f) &&
 518
 519         # Unresolved entries have not expired yet
 520         git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
 521         count_pre_post 2 0 &&
 522
 523         # Unresolved entries have expired
 524         git -c gc.rerereresolved=5 -c gc.rerereunresolved=1 rerere gc &&
 525         count_pre_post 0 0 &&
 526
 527         # Recreate the conflicted state
 528         merge_conflict_resolve &&
 529         count_pre_post 2 0 &&
 530
 531         # Clear it
 532         git rerere clear &&
 533         count_pre_post 0 0 &&
 534
 535         # Recreate the conflicted state
 536         merge_conflict_resolve &&
 537         count_pre_post 2 0 &&
 538
 539         # We resolved file1 and file2
 540         git rerere &&
 541         git rerere remaining >actual &&
 542         test_must_be_empty actual &&
 543
 544         # We must have recorded both of them
 545         count_pre_post 2 2 &&
 546
 547         # Now we should be able to resolve them both
 548         git reset --hard &&
 549         test_must_fail git merge six.1 &&
 550         git rerere &&
 551
 552         git rerere remaining >actual &&
 553         test_must_be_empty actual &&
 554
 555         concat_insert short 6.1 6.2 >file1.expect &&
 556         concat_insert long 6.1 6.2 >file2.expect &&
 557         test_cmp file1.expect file1 &&
 558         test_cmp file2.expect file2 &&
 559
 560         # Forget resolution for file2
 561         git rerere forget file2 &&
 562         echo file2 >expect &&
 563         git rerere status >actual &&
 564         test_cmp expect actual &&
 565         count_pre_post 2 1 &&
 566
 567         # file2 already has correct resolution, so record it again
 568         git rerere &&
 569
 570         # Pretend that the resolutions are old again
 571         test-tool chmtime -172800 $(find .git/rr-cache/ -type f) &&
 572
 573         # Resolved entries have not expired yet
 574         git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
 575
 576         count_pre_post 2 2 &&
 577
 578         # Resolved entries have expired
 579         git -c gc.rerereresolved=1 -c gc.rerereunresolved=5 rerere gc &&
 580         count_pre_post 0 0
 581 '
 582
 583 test_expect_success 'rerere with unexpected conflict markers does not crash' '
 584         git reset --hard &&
 585
 586         git checkout -b branch-1 main &&
 587         echo "bar" >test &&
 588         git add test &&
 589         git commit -q -m two &&
 590
 591         git reset --hard &&
 592         git checkout -b branch-2 main &&
 593         echo "foo" >test &&
 594         git add test &&
 595         git commit -q -a -m one &&
 596
 597         test_must_fail git merge branch-1 &&
 598         echo "<<<<<<< a" >test &&
 599         git rerere &&
 600
 601         git rerere clear
 602 '
 603
 604 test_expect_success 'rerere with inner conflict markers' '
 605         git reset --hard &&
 606
 607         git checkout -b A main &&
 608         echo "bar" >test &&
 609         git add test &&
 610         git commit -q -m two &&
 611         echo "baz" >test &&
 612         git add test &&
 613         git commit -q -m three &&
 614
 615         git reset --hard &&
 616         git checkout -b B main &&
 617         echo "foo" >test &&
 618         git add test &&
 619         git commit -q -a -m one &&
 620
 621         test_must_fail git merge A~ &&
 622         git add test &&
 623         git commit -q -m "will solve conflicts later" &&
 624         test_must_fail git merge A &&
 625
 626         echo "resolved" >test &&
 627         git add test &&
 628         git commit -q -m "solved conflict" &&
 629
 630         echo "resolved" >expect &&
 631
 632         git reset --hard HEAD~~ &&
 633         test_must_fail git merge A~ &&
 634         git add test &&
 635         git commit -q -m "will solve conflicts later" &&
 636         test_must_fail git merge A &&
 637         cat test >actual &&
 638         test_cmp expect actual &&
 639
 640         git add test &&
 641         git commit -m "rerere solved conflict" &&
 642         git reset --hard HEAD~ &&
 643         test_must_fail git merge A &&
 644         cat test >actual &&
 645         test_cmp expect actual
 646 '
 647
 648 test_expect_success 'setup simple stage 1 handling' '
 649         test_create_repo stage_1_handling &&
 650         (
 651                 cd stage_1_handling &&
 652
 653                 test_seq 1 10 >original &&
 654                 git add original &&
 655                 git commit -m original &&
 656
 657                 git checkout -b A main &&
 658                 git mv original A &&
 659                 git commit -m "rename to A" &&
 660
 661                 git checkout -b B main &&
 662                 git mv original B &&
 663                 git commit -m "rename to B"
 664         )
 665 '
 666
 667 test_expect_success 'test simple stage 1 handling' '
 668         (
 669                 cd stage_1_handling &&
 670
 671                 git config rerere.enabled true &&
 672                 git checkout A^0 &&
 673                 test_must_fail git merge B^0
 674         )
 675 '
 676
 677 test_done