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-tool chmtime --get -60 $rr/postimage) &&
 170
 171         git checkout -b third master &&
 172         git show second^:a1 | sed "s/To die: t/To die! T/" >a1 &&
 173         git commit -q -a -m third &&
 174
 175         test_must_fail git merge first &&
 176         # rerere kicked in
 177         ! grep "^=======\$" a1 &&
 178         test_cmp expect a1
 179 '
 180
 181 test_expect_success 'rerere updates postimage timestamp' '
 182         newmtimepost=$(test-tool chmtime --get $rr/postimage) &&
 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-tool chmtime =$just_over_60_days_ago $rr/preimage &&
 224         test-tool chmtime =$almost_60_days_ago $rr/postimage &&
 225         test-tool chmtime =$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 $rr2/preimage
 232 '
 233
 234 test_expect_success 'old records rest in peace' '
 235         test-tool chmtime =$just_over_60_days_ago $rr/postimage &&
 236         test-tool chmtime =$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, $right_now)" '
 245                 rm -fr .git/rr-cache &&
 246                 rr=.git/rr-cache/$ZERO_OID &&
 247                 mkdir -p "$rr" &&
 248                 >"$rr/preimage" &&
 249                 >"$rr/postimage" &&
 250
 251                 two_days_ago=$((-2*86400)) &&
 252                 test-tool chmtime =$two_days_ago "$rr/preimage" &&
 253                 test-tool 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                 test_must_be_empty actual
 271         '
 272 }
 273
 274 rerere_gc_custom_expiry_test 5 0
 275
 276 rerere_gc_custom_expiry_test 5.days.ago now
 277
 278 test_expect_success 'setup: file2 added differently in two branches' '
 279         git reset --hard &&
 280
 281         git checkout -b fourth &&
 282         echo Hallo >file2 &&
 283         git add file2 &&
 284         test_tick &&
 285         git commit -m version1 &&
 286
 287         git checkout third &&
 288         echo Bello >file2 &&
 289         git add file2 &&
 290         test_tick &&
 291         git commit -m version2 &&
 292
 293         test_must_fail git merge fourth &&
 294         echo Cello >file2 &&
 295         git add file2 &&
 296         git commit -m resolution
 297 '
 298
 299 test_expect_success 'resolution was recorded properly' '
 300         echo Cello >expected &&
 301
 302         git reset --hard HEAD~2 &&
 303         git checkout -b fifth &&
 304
 305         echo Hallo >file3 &&
 306         git add file3 &&
 307         test_tick &&
 308         git commit -m version1 &&
 309
 310         git checkout third &&
 311         echo Bello >file3 &&
 312         git add file3 &&
 313         test_tick &&
 314         git commit -m version2 &&
 315         git tag version2 &&
 316
 317         test_must_fail git merge fifth &&
 318         test_cmp expected file3 &&
 319         test_must_fail git update-index --refresh
 320 '
 321
 322 test_expect_success 'rerere.autoupdate' '
 323         git config rerere.autoupdate true &&
 324         git reset --hard &&
 325         git checkout version2 &&
 326         test_must_fail git merge fifth &&
 327         git update-index --refresh
 328 '
 329
 330 test_expect_success 'merge --rerere-autoupdate' '
 331         test_might_fail git config --unset rerere.autoupdate &&
 332         git reset --hard &&
 333         git checkout version2 &&
 334         test_must_fail git merge --rerere-autoupdate fifth &&
 335         git update-index --refresh
 336 '
 337
 338 test_expect_success 'merge --no-rerere-autoupdate' '
 339         headblob=$(git rev-parse version2:file3) &&
 340         mergeblob=$(git rev-parse fifth:file3) &&
 341         cat >expected <<-EOF &&
 342         100644 $headblob 2      file3
 343         100644 $mergeblob 3     file3
 344         EOF
 345
 346         git config rerere.autoupdate true &&
 347         git reset --hard &&
 348         git checkout version2 &&
 349         test_must_fail git merge --no-rerere-autoupdate fifth &&
 350         git ls-files -u >actual &&
 351         test_cmp expected actual
 352 '
 353
 354 test_expect_success 'set up an unresolved merge' '
 355         headblob=$(git rev-parse version2:file3) &&
 356         mergeblob=$(git rev-parse fifth:file3) &&
 357         cat >expected.unresolved <<-EOF &&
 358         100644 $headblob 2      file3
 359         100644 $mergeblob 3     file3
 360         EOF
 361
 362         test_might_fail git config --unset rerere.autoupdate &&
 363         git reset --hard &&
 364         git checkout version2 &&
 365         fifth=$(git rev-parse fifth) &&
 366         echo "$fifth            branch 'fifth' of ." |
 367         git fmt-merge-msg >msg &&
 368         ancestor=$(git merge-base version2 fifth) &&
 369         test_must_fail git merge-recursive "$ancestor" -- HEAD fifth &&
 370
 371         git ls-files --stage >failedmerge &&
 372         cp file3 file3.conflict &&
 373
 374         git ls-files -u >actual &&
 375         test_cmp expected.unresolved actual
 376 '
 377
 378 test_expect_success 'explicit rerere' '
 379         test_might_fail git config --unset rerere.autoupdate &&
 380         git rm -fr --cached . &&
 381         git update-index --index-info <failedmerge &&
 382         cp file3.conflict file3 &&
 383         test_must_fail git update-index --refresh -q &&
 384
 385         git rerere &&
 386         git ls-files -u >actual &&
 387         test_cmp expected.unresolved actual
 388 '
 389
 390 test_expect_success 'explicit rerere with autoupdate' '
 391         git config rerere.autoupdate true &&
 392         git rm -fr --cached . &&
 393         git update-index --index-info <failedmerge &&
 394         cp file3.conflict file3 &&
 395         test_must_fail git update-index --refresh -q &&
 396
 397         git rerere &&
 398         git update-index --refresh
 399 '
 400
 401 test_expect_success 'explicit rerere --rerere-autoupdate overrides' '
 402         git config rerere.autoupdate false &&
 403         git rm -fr --cached . &&
 404         git update-index --index-info <failedmerge &&
 405         cp file3.conflict file3 &&
 406         git rerere &&
 407         git ls-files -u >actual1 &&
 408
 409         git rm -fr --cached . &&
 410         git update-index --index-info <failedmerge &&
 411         cp file3.conflict file3 &&
 412         git rerere --rerere-autoupdate &&
 413         git update-index --refresh &&
 414
 415         git rm -fr --cached . &&
 416         git update-index --index-info <failedmerge &&
 417         cp file3.conflict file3 &&
 418         git rerere --rerere-autoupdate --no-rerere-autoupdate &&
 419         git ls-files -u >actual2 &&
 420
 421         git rm -fr --cached . &&
 422         git update-index --index-info <failedmerge &&
 423         cp file3.conflict file3 &&
 424         git rerere --rerere-autoupdate --no-rerere-autoupdate --rerere-autoupdate &&
 425         git update-index --refresh &&
 426
 427         test_cmp expected.unresolved actual1 &&
 428         test_cmp expected.unresolved actual2
 429 '
 430
 431 test_expect_success 'rerere --no-no-rerere-autoupdate' '
 432         git rm -fr --cached . &&
 433         git update-index --index-info <failedmerge &&
 434         cp file3.conflict file3 &&
 435         test_must_fail git rerere --no-no-rerere-autoupdate 2>err &&
 436         test_i18ngrep [Uu]sage err &&
 437         test_must_fail git update-index --refresh
 438 '
 439
 440 test_expect_success 'rerere -h' '
 441         test_must_fail git rerere -h >help &&
 442         test_i18ngrep [Uu]sage help
 443 '
 444
 445 concat_insert () {
 446         last=$1
 447         shift
 448         cat early && printf "%s\n" "$@" && cat late "$last"
 449 }
 450
 451 count_pre_post () {
 452         find .git/rr-cache/ -type f -name "preimage*" >actual &&
 453         test_line_count = "$1" actual &&
 454         find .git/rr-cache/ -type f -name "postimage*" >actual &&
 455         test_line_count = "$2" actual
 456 }
 457
 458 merge_conflict_resolve () {
 459         git reset --hard &&
 460         test_must_fail git merge six.1 &&
 461         # Resolution is to replace 7 with 6.1 and 6.2 (i.e. take both)
 462         concat_insert short 6.1 6.2 >file1 &&
 463         concat_insert long 6.1 6.2 >file2
 464 }
 465
 466 test_expect_success 'multiple identical conflicts' '
 467         rm -fr .git/rr-cache &&
 468         mkdir .git/rr-cache &&
 469         git reset --hard &&
 470
 471         test_seq 1 6 >early &&
 472         >late &&
 473         test_seq 11 15 >short &&
 474         test_seq 111 120 >long &&
 475         concat_insert short >file1 &&
 476         concat_insert long >file2 &&
 477         git add file1 file2 &&
 478         git commit -m base &&
 479         git tag base &&
 480         git checkout -b six.1 &&
 481         concat_insert short 6.1 >file1 &&
 482         concat_insert long 6.1 >file2 &&
 483         git add file1 file2 &&
 484         git commit -m 6.1 &&
 485         git checkout -b six.2 HEAD^ &&
 486         concat_insert short 6.2 >file1 &&
 487         concat_insert long 6.2 >file2 &&
 488         git add file1 file2 &&
 489         git commit -m 6.2 &&
 490
 491         # At this point, six.1 and six.2
 492         # - derive from common ancestor that has two files
 493         #   1...6 7 11..15 (file1) and 1...6 7 111..120 (file2)
 494         # - six.1 replaces these 7s with 6.1
 495         # - six.2 replaces these 7s with 6.2
 496
 497         merge_conflict_resolve &&
 498
 499         # Check that rerere knows that file1 and file2 have conflicts
 500
 501         printf "%s\n" file1 file2 >expect &&
 502         git ls-files -u | sed -e "s/^.* //" | sort -u >actual &&
 503         test_cmp expect actual &&
 504
 505         git rerere status | sort >actual &&
 506         test_cmp expect actual &&
 507
 508         git rerere remaining >actual &&
 509         test_cmp expect actual &&
 510
 511         count_pre_post 2 0 &&
 512
 513         # Pretend that the conflicts were made quite some time ago
 514         test-tool chmtime -172800 $(find .git/rr-cache/ -type f) &&
 515
 516         # Unresolved entries have not expired yet
 517         git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
 518         count_pre_post 2 0 &&
 519
 520         # Unresolved entries have expired
 521         git -c gc.rerereresolved=5 -c gc.rerereunresolved=1 rerere gc &&
 522         count_pre_post 0 0 &&
 523
 524         # Recreate the conflicted state
 525         merge_conflict_resolve &&
 526         count_pre_post 2 0 &&
 527
 528         # Clear it
 529         git rerere clear &&
 530         count_pre_post 0 0 &&
 531
 532         # Recreate the conflicted state
 533         merge_conflict_resolve &&
 534         count_pre_post 2 0 &&
 535
 536         # We resolved file1 and file2
 537         git rerere &&
 538         git rerere remaining >actual &&
 539         test_must_be_empty actual &&
 540
 541         # We must have recorded both of them
 542         count_pre_post 2 2 &&
 543
 544         # Now we should be able to resolve them both
 545         git reset --hard &&
 546         test_must_fail git merge six.1 &&
 547         git rerere &&
 548
 549         git rerere remaining >actual &&
 550         test_must_be_empty actual &&
 551
 552         concat_insert short 6.1 6.2 >file1.expect &&
 553         concat_insert long 6.1 6.2 >file2.expect &&
 554         test_cmp file1.expect file1 &&
 555         test_cmp file2.expect file2 &&
 556
 557         # Forget resolution for file2
 558         git rerere forget file2 &&
 559         echo file2 >expect &&
 560         git rerere status >actual &&
 561         test_cmp expect actual &&
 562         count_pre_post 2 1 &&
 563
 564         # file2 already has correct resolution, so record it again
 565         git rerere &&
 566
 567         # Pretend that the resolutions are old again
 568         test-tool chmtime -172800 $(find .git/rr-cache/ -type f) &&
 569
 570         # Resolved entries have not expired yet
 571         git -c gc.rerereresolved=5 -c gc.rerereunresolved=5 rerere gc &&
 572
 573         count_pre_post 2 2 &&
 574
 575         # Resolved entries have expired
 576         git -c gc.rerereresolved=1 -c gc.rerereunresolved=5 rerere gc &&
 577         count_pre_post 0 0
 578 '
 579
 580 test_done