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    ! [master] 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 ++++++ [master] initial
  23 '
  24
  25 . ./test-lib.sh
  26
  27 test_expect_success 'setup' '
  28         cat >a1 <<-\EOF &&
  29         Some title
  30         ==========
  31         Whether '\''tis nobler in the mind to suffer
  32         The slings and arrows of outrageous fortune,
  33         Or to take arms against a sea of troubles,
  34         And by opposing end them? To die: to sleep;
  35         No more; and by a sleep to say we end
  36         The heart-ache and the thousand natural shocks
  37         That flesh is heir to, '\''tis a consummation
  38         Devoutly to be wish'\''d.
  39         EOF
  40
  41         git add a1 &&
  42         test_tick &&
  43         git commit -q -a -m initial &&
  44
  45         cat >>a1 <<-\EOF &&
  46         Some title
  47         ==========
  48         To die, to sleep;
  49         To sleep: perchance to dream: ay, there'\''s the rub;
  50         For in that sleep of death what dreams may come
  51         When we have shuffled off this mortal coil,
  52         Must give us pause: there'\''s the respect
  53         That makes calamity of so long life;
  54         EOF
  55
  56         git checkout -b first &&
  57         test_tick &&
  58         git commit -q -a -m first &&
  59
  60         git checkout -b second master &&
  61         git show first:a1 |
  62         sed -e "s/To die, t/To die! T/" -e "s/Some title/Some Title/" >a1 &&
  63         echo "* END *" >>a1 &&
  64         test_tick &&
  65         git commit -q -a -m second
  66 '
  67
  68 test_expect_success 'nothing recorded without rerere' '
  69         rm -rf .git/rr-cache &&
  70         git config rerere.enabled false &&
  71         test_must_fail git merge first &&
  72         ! test -d .git/rr-cache
  73 '
  74
  75 test_expect_success 'activate rerere, old style (conflicting merge)' '
  76         git reset --hard &&
  77         mkdir .git/rr-cache &&
  78         test_might_fail git config --unset rerere.enabled &&
  79         test_must_fail git merge first &&
  80
  81         sha1=$(perl -pe "s/     .*//" .git/MERGE_RR) &&
  82         rr=.git/rr-cache/$sha1 &&
  83         grep "^=======\$" $rr/preimage &&
  84         ! test -f $rr/postimage &&
  85         ! test -f $rr/thisimage
  86 '
  87
  88 test_expect_success 'rerere.enabled works, too' '
  89         rm -rf .git/rr-cache &&
  90         git config rerere.enabled true &&
  91         git reset --hard &&
  92         test_must_fail git merge first &&
  93
  94         sha1=$(perl -pe "s/     .*//" .git/MERGE_RR) &&
  95         rr=.git/rr-cache/$sha1 &&
  96         grep ^=======$ $rr/preimage
  97 '
  98
  99 test_expect_success 'set up rr-cache' '
 100         rm -rf .git/rr-cache &&
 101         git config rerere.enabled true &&
 102         git reset --hard &&
 103         test_must_fail git merge first &&
 104         sha1=$(perl -pe "s/     .*//" .git/MERGE_RR) &&
 105         rr=.git/rr-cache/$sha1
 106 '
 107
 108 test_expect_success 'rr-cache looks sane' '
 109         # no postimage or thisimage yet
 110         ! test -f $rr/postimage &&
 111         ! test -f $rr/thisimage &&
 112
 113         # preimage has right number of lines
 114         cnt=$(sed -ne "/^<<<<<<</,/^>>>>>>>/p" $rr/preimage | wc -l) &&
 115         echo $cnt &&
 116         test $cnt = 13
 117 '
 118
 119 test_expect_success 'rerere diff' '
 120         git show first:a1 >a1 &&
 121         cat >expect <<-\EOF &&
 122         --- a/a1
 123         +++ b/a1
 124         @@ -1,4 +1,4 @@
 125         -Some Title
 126         +Some title
 127          ==========
 128          Whether '\''tis nobler in the mind to suffer
 129          The slings and arrows of outrageous fortune,
 130         @@ -8,21 +8,11 @@
 131          The heart-ache and the thousand natural shocks
 132          That flesh is heir to, '\''tis a consummation
 133          Devoutly to be wish'\''d.
 134         -<<<<<<<
 135         -Some Title
 136         -==========
 137         -To die! To sleep;
 138         -=======
 139          Some title
 140          ==========
 141          To die, to sleep;
 142         ->>>>>>>
 143          To sleep: perchance to dream: ay, there'\''s the rub;
 144          For in that sleep of death what dreams may come
 145          When we have shuffled off this mortal coil,
 146          Must give us pause: there'\''s the respect
 147          That makes calamity of so long life;
 148         -<<<<<<<
 149         -=======
 150         -* END *
 151         ->>>>>>>
 152         EOF
 153         git rerere diff >out &&
 154         test_cmp expect out
 155 '
 156
 157 test_expect_success 'rerere status' '
 158         echo a1 >expect &&
 159         git rerere status >out &&
 160         test_cmp expect out
 161 '
 162
 163 test_expect_success 'first postimage wins' '
 164         git show first:a1 | sed "s/To die: t/To die! T/" >expect &&
 165
 166         git commit -q -a -m "prefer first over second" &&
 167         test -f $rr/postimage &&
 168
 169         oldmtimepost=$(test-chmtime -v -60 $rr/postimage | cut -f 1) &&
 170
 171         git checkout -b third master &&
 172         git show second^:a1 | sed "s/To die: t/To die! T/" >a1 &&
 173         git commit -q -a -m third &&
 174
 175         test_must_fail git merge first &&
 176         # rerere kicked in
 177         ! grep "^=======\$" a1 &&
 178         test_cmp expect a1
 179 '
 180
 181 test_expect_success 'rerere updates postimage timestamp' '
 182         newmtimepost=$(test-chmtime -v +0 $rr/postimage | cut -f 1) &&
 183         test $oldmtimepost -lt $newmtimepost
 184 '
 185
 186 test_expect_success 'rerere clear' '
 187         mv $rr/postimage .git/post-saved &&
 188         echo "$sha1     a1" | perl -pe "y/\012/\000/" >.git/MERGE_RR &&
 189         git rerere clear &&
 190         ! test -d $rr
 191 '
 192
 193 test_expect_success 'leftover directory' '
 194         git reset --hard &&
 195         mkdir -p $rr &&
 196         test_must_fail git merge first &&
 197         test -f $rr/preimage
 198 '
 199
 200 test_expect_success 'missing preimage' '
 201         git reset --hard &&
 202         mkdir -p $rr &&
 203         cp .git/post-saved $rr/postimage &&
 204         test_must_fail git merge first &&
 205         test -f $rr/preimage
 206 '
 207
 208 test_expect_success 'set up for garbage collection tests' '
 209         mkdir -p $rr &&
 210         echo Hello >$rr/preimage &&
 211         echo World >$rr/postimage &&
 212
 213         sha2=4000000000000000000000000000000000000000 &&
 214         rr2=.git/rr-cache/$sha2 &&
 215         mkdir $rr2 &&
 216         echo Hello >$rr2/preimage &&
 217
 218         almost_15_days_ago=$((60-15*86400)) &&
 219         just_over_15_days_ago=$((-1-15*86400)) &&
 220         almost_60_days_ago=$((60-60*86400)) &&
 221         just_over_60_days_ago=$((-1-60*86400)) &&
 222
 223         test-chmtime =$just_over_60_days_ago $rr/preimage &&
 224         test-chmtime =$almost_60_days_ago $rr/postimage &&
 225         test-chmtime =$almost_15_days_ago $rr2/preimage
 226 '
 227
 228 test_expect_success 'gc preserves young or recently used records' '
 229         git rerere gc &&
 230         test -f $rr/preimage &&
 231         test -f $rr2/preimage
 232 '
 233
 234 test_expect_success 'old records rest in peace' '
 235         test-chmtime =$just_over_60_days_ago $rr/postimage &&
 236         test-chmtime =$just_over_15_days_ago $rr2/preimage &&
 237         git rerere gc &&
 238         ! test -f $rr/preimage &&
 239         ! test -f $rr2/preimage
 240 '
 241
 242 rerere_gc_custom_expiry_test () {
 243         five_days="$1" right_now="$2"
 244         test_expect_success "rerere gc with custom expiry ($five_days, $right_now)" '
 245                 rm -fr .git/rr-cache &&
 246                 rr=.git/rr-cache/$_z40 &&
 247                 mkdir -p "$rr" &&
 248                 >"$rr/preimage" &&
 249                 >"$rr/postimage" &&
 250
 251                 two_days_ago=$((-2*86400)) &&
 252                 test-chmtime =$two_days_ago "$rr/preimage" &&
 253                 test-chmtime =$two_days_ago "$rr/postimage" &&
 254
 255                 find .git/rr-cache -type f | sort >original &&
 256
 257                 git -c "gc.rerereresolved=$five_days" \
 258                     -c "gc.rerereunresolved=$five_days" rerere gc &&
 259                 find .git/rr-cache -type f | sort >actual &&
 260                 test_cmp original actual &&
 261
 262                 git -c "gc.rerereresolved=$five_days" \
 263                     -c "gc.rerereunresolved=$right_now" rerere gc &&
 264                 find .git/rr-cache -type f | sort >actual &&
 265                 test_cmp original actual &&
 266
 267                 git -c "gc.rerereresolved=$right_now" \
 268                     -c "gc.rerereunresolved=$right_now" rerere gc &&
 269                 find .git/rr-cache -type f | sort >actual &&
 270                 >expect &&
 271                 test_cmp expect actual
 272         '
 273 }
 274
 275 rerere_gc_custom_expiry_test 5 0
 276
 277 rerere_gc_custom_expiry_test 5.days.ago now
 278
 279 test_expect_success 'setup: file2 added differently in two branches' '
 280         git reset --hard &&
 281
 282         git checkout -b fourth &&
 283         echo Hallo >file2 &&
 284         git add file2 &&
 285         test_tick &&
 286         git commit -m version1 &&
 287
 288         git checkout third &&
 289         echo Bello >file2 &&
 290         git add file2 &&
 291         test_tick &&
 292         git commit -m version2 &&
 293
 294         test_must_fail git merge fourth &&
 295         echo Cello >file2 &&
 296         git add file2 &&
 297         git commit -m resolution
 298 '
 299
 300 test_expect_success 'resolution was recorded properly' '
 301         echo Cello >expected &&
 302
 303         git reset --hard HEAD~2 &&
 304         git checkout -b fifth &&
 305
 306         echo Hallo >file3 &&
 307         git add file3 &&
 308         test_tick &&
 309         git commit -m version1 &&
 310
 311         git checkout third &&
 312         echo Bello >file3 &&
 313         git add file3 &&
 314         test_tick &&
 315         git commit -m version2 &&
 316         git tag version2 &&
 317
 318         test_must_fail git merge fifth &&
 319         test_cmp expected file3 &&
 320         test_must_fail git update-index --refresh
 321 '
 322
 323 test_expect_success 'rerere.autoupdate' '
 324         git config rerere.autoupdate true &&
 325         git reset --hard &&
 326         git checkout version2 &&
 327         test_must_fail git merge fifth &&
 328         git update-index --refresh
 329 '
 330
 331 test_expect_success 'merge --rerere-autoupdate' '
 332         test_might_fail git config --unset rerere.autoupdate &&
 333         git reset --hard &&
 334         git checkout version2 &&
 335         test_must_fail git merge --rerere-autoupdate fifth &&
 336         git update-index --refresh
 337 '
 338
 339 test_expect_success 'merge --no-rerere-autoupdate' '
 340         headblob=$(git rev-parse version2:file3) &&
 341         mergeblob=$(git rev-parse fifth:file3) &&
 342         cat >expected <<-EOF &&
 343         100644 $headblob 2      file3
 344         100644 $mergeblob 3     file3
 345         EOF
 346
 347         git config rerere.autoupdate true &&
 348         git reset --hard &&
 349         git checkout version2 &&
 350         test_must_fail git merge --no-rerere-autoupdate fifth &&
 351         git ls-files -u >actual &&
 352         test_cmp expected actual
 353 '
 354
 355 test_expect_success 'set up an unresolved merge' '
 356         headblob=$(git rev-parse version2:file3) &&
 357         mergeblob=$(git rev-parse fifth:file3) &&
 358         cat >expected.unresolved <<-EOF &&
 359         100644 $headblob 2      file3
 360         100644 $mergeblob 3     file3
 361         EOF
 362
 363         test_might_fail git config --unset rerere.autoupdate &&
 364         git reset --hard &&
 365         git checkout version2 &&
 366         fifth=$(git rev-parse fifth) &&
 367         echo "$fifth            branch 'fifth' of ." |
 368         git fmt-merge-msg >msg &&
 369         ancestor=$(git merge-base version2 fifth) &&
 370         test_must_fail git merge-recursive "$ancestor" -- HEAD fifth &&
 371
 372         git ls-files --stage >failedmerge &&
 373         cp file3 file3.conflict &&
 374
 375         git ls-files -u >actual &&
 376         test_cmp expected.unresolved actual
 377 '
 378
 379 test_expect_success 'explicit rerere' '
 380         test_might_fail git config --unset rerere.autoupdate &&
 381         git rm -fr --cached . &&
 382         git update-index --index-info <failedmerge &&
 383         cp file3.conflict file3 &&
 384         test_must_fail git update-index --refresh -q &&
 385
 386         git rerere &&
 387         git ls-files -u >actual &&
 388         test_cmp expected.unresolved actual
 389 '
 390
 391 test_expect_success 'explicit rerere with autoupdate' '
 392         git config rerere.autoupdate true &&
 393         git rm -fr --cached . &&
 394         git update-index --index-info <failedmerge &&
 395         cp file3.conflict file3 &&
 396         test_must_fail git update-index --refresh -q &&
 397
 398         git rerere &&
 399         git update-index --refresh
 400 '
 401
 402 test_expect_success 'explicit rerere --rerere-autoupdate overrides' '
 403         git config rerere.autoupdate false &&
 404         git rm -fr --cached . &&
 405         git update-index --index-info <failedmerge &&
 406         cp file3.conflict file3 &&
 407         git rerere &&
 408         git ls-files -u >actual1 &&
 409
 410         git rm -fr --cached . &&
 411         git update-index --index-info <failedmerge &&
 412         cp file3.conflict file3 &&
 413         git rerere --rerere-autoupdate &&
 414         git update-index --refresh &&
 415
 416         git rm -fr --cached . &&
 417         git update-index --index-info <failedmerge &&
 418         cp file3.conflict file3 &&
 419         git rerere --rerere-autoupdate --no-rerere-autoupdate &&
 420         git ls-files -u >actual2 &&
 421
 422         git rm -fr --cached . &&
 423         git update-index --index-info <failedmerge &&
 424         cp file3.conflict file3 &&
 425         git rerere --rerere-autoupdate --no-rerere-autoupdate --rerere-autoupdate &&
 426         git update-index --refresh &&
 427
 428         test_cmp expected.unresolved actual1 &&
 429         test_cmp expected.unresolved actual2
 430 '
 431
 432 test_expect_success 'rerere --no-no-rerere-autoupdate' '
 433         git rm -fr --cached . &&
 434         git update-index --index-info <failedmerge &&
 435         cp file3.conflict file3 &&
 436         test_must_fail git rerere --no-no-rerere-autoupdate 2>err &&
 437         test_i18ngrep [Uu]sage err &&
 438         test_must_fail git update-index --refresh
 439 '
 440
 441 test_expect_success 'rerere -h' '
 442         test_must_fail git rerere -h >help &&
 443         test_i18ngrep [Uu]sage help
 444 '
 445
 446 concat_insert () {
 447         last=$1
 448         shift
 449         cat early && printf "%s\n" "$@" && cat late "$last"
 450 }
 451
 452 count_pre_post () {
 453         find .git/rr-cache/ -type f -name "preimage*" >actual &&
 454         test_line_count = "$1" actual &&
 455         find .git/rr-cache/ -type f -name "postimage*" >actual &&
 456         test_line_count = "$2" actual
 457 }
 458
 459 merge_conflict_resolve () {
 460         git reset --hard &&
 461         test_must_fail git merge six.1 &&
 462         # Resolution is to replace 7 with 6.1 and 6.2 (i.e. take both)
 463         concat_insert short 6.1 6.2 >file1 &&
 464         concat_insert long 6.1 6.2 >file2
 465 }
 466
 467 test_expect_success 'multiple identical conflicts' '
 468         rm -fr .git/rr-cache &&
 469         mkdir .git/rr-cache &&
 470         git reset --hard &&
 471
 472         test_seq 1 6 >early &&
 473         >late &&
 474         test_seq 11 15 >short &&
 475         test_seq 111 120 >long &&
 476         concat_insert short >file1 &&
 477         concat_insert long >file2 &&
 478         git add file1 file2 &&
 479         git commit -m base &&
 480         git tag base &&
 481         git checkout -b six.1 &&
 482         concat_insert short 6.1 >file1 &&
 483         concat_insert long 6.1 >file2 &&
 484         git add file1 file2 &&
 485         git commit -m 6.1 &&
 486         git checkout -b six.2 HEAD^ &&
 487         concat_insert short 6.2 >file1 &&
 488         concat_insert long 6.2 >file2 &&
 489         git add file1 file2 &&
 490         git commit -m 6.2 &&
 491
 492         # At this point, six.1 and six.2
 493         # - derive from common ancestor that has two files
 494         #   1...6 7 11..15 (file1) and 1...6 7 111..120 (file2)
 495         # - six.1 replaces these 7s with 6.1
 496         # - six.2 replaces these 7s with 6.2
 497
 498         merge_conflict_resolve &&
 499
 500         # Check that rerere knows that file1 and file2 have conflicts
 501
 502         printf "%s\n" file1 file2 >expect &&
 503         git ls-files -u | sed -e "s/^.* //" | sort -u >actual &&
 504         test_cmp expect actual &&
 505
 506         git rerere status | sort >actual &&
 507         test_cmp expect actual &&
 508
 509         git rerere remaining >actual &&
 510         test_cmp expect actual &&
 511
 512         count_pre_post 2 0 &&
 513
 514         # Pretend that the conflicts were made quite some time ago
 515         find .git/rr-cache/ -type f | xargs test-chmtime -172800 &&
 516
 517         # Unresolved entries have not expired yet
 518         git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
 519         count_pre_post 2 0 &&
 520
 521         # Unresolved entries have expired
 522         git -c gc.rerereresolved=5 -c gc.rerereunresolved=1 rerere gc &&
 523         count_pre_post 0 0 &&
 524
 525         # Recreate the conflicted state
 526         merge_conflict_resolve &&
 527         count_pre_post 2 0 &&
 528
 529         # Clear it
 530         git rerere clear &&
 531         count_pre_post 0 0 &&
 532
 533         # Recreate the conflicted state
 534         merge_conflict_resolve &&
 535         count_pre_post 2 0 &&
 536
 537         # We resolved file1 and file2
 538         git rerere &&
 539         >expect &&
 540         git rerere remaining >actual &&
 541         test_cmp expect actual &&
 542
 543         # We must have recorded both of them
 544         count_pre_post 2 2 &&
 545
 546         # Now we should be able to resolve them both
 547         git reset --hard &&
 548         test_must_fail git merge six.1 &&
 549         git rerere &&
 550
 551         >expect &&
 552         git rerere remaining >actual &&
 553         test_cmp expect 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         find .git/rr-cache/ -type f | xargs test-chmtime -172800 &&
 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_done