t/t1700-split-index.sh

   1 #!/bin/sh
   2
   3 test_description='split index mode tests'
   4
   5 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
   6 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
   7
   8 . ./test-lib.sh
   9
  10 # We need total control of index splitting here
  11 sane_unset GIT_TEST_SPLIT_INDEX
  12
  13 # Testing a hard coded SHA against an index with an extension
  14 # that can vary from run to run is problematic so we disable
  15 # those extensions.
  16 sane_unset GIT_TEST_FSMONITOR
  17 sane_unset GIT_TEST_INDEX_THREADS
  18
  19 # Create a file named as $1 with content read from stdin.
  20 # Set the file's mtime to a few seconds in the past to avoid racy situations.
  21 create_non_racy_file () {
  22         cat >"$1" &&
  23         test-tool chmtime =-5 "$1"
  24 }
  25
  26 test_expect_success 'setup' '
  27         test_oid_cache <<-EOF
  28         own_v3 sha1:8299b0bcd1ac364e5f1d7768efb62fa2da79a339
  29         own_v3 sha256:38a6d2925e3eceec33ad7b34cbff4e0086caa0daf28f31e51f5bd94b4a7af86b
  30
  31         base_v3 sha1:39d890139ee5356c7ef572216cebcd27aa41f9df
  32         base_v3 sha256:c9baeadf905112bf6c17aefbd7d02267afd70ded613c30cafed2d40cb506e1ed
  33
  34         own_v4 sha1:432ef4b63f32193984f339431fd50ca796493569
  35         own_v4 sha256:6738ac6319c25b694afa7bcc313deb182d1a59b68bf7a47b4296de83478c0420
  36
  37         base_v4 sha1:508851a7f0dfa8691e9f69c7f055865389012491
  38         base_v4 sha256:3177d4adfdd4b6904f7e921d91d715a471c0dde7cf6a4bba574927f02b699508
  39         EOF
  40 '
  41
  42 test_expect_success 'enable split index' '
  43         git config splitIndex.maxPercentChange 100 &&
  44         git update-index --split-index &&
  45         test-tool dump-split-index .git/index >actual &&
  46         indexversion=$(git update-index --show-index-version) &&
  47
  48         # NEEDSWORK: Stop hard-coding checksums.
  49         if test "$indexversion" = "4"
  50         then
  51                 own=$(test_oid own_v4) &&
  52                 base=$(test_oid base_v4)
  53         else
  54                 own=$(test_oid own_v3) &&
  55                 base=$(test_oid base_v3)
  56         fi &&
  57
  58         cat >expect <<-EOF &&
  59         own $own
  60         base $base
  61         replacements:
  62         deletions:
  63         EOF
  64         test_cmp expect actual
  65 '
  66
  67 test_expect_success 'add one file' '
  68         create_non_racy_file one &&
  69         git update-index --add one &&
  70         git ls-files --stage >ls-files.actual &&
  71         cat >ls-files.expect <<-EOF &&
  72         100644 $EMPTY_BLOB 0    one
  73         EOF
  74         test_cmp ls-files.expect ls-files.actual &&
  75
  76         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
  77         cat >expect <<-EOF &&
  78         base $base
  79         100644 $EMPTY_BLOB 0    one
  80         replacements:
  81         deletions:
  82         EOF
  83         test_cmp expect actual
  84 '
  85
  86 test_expect_success 'disable split index' '
  87         git update-index --no-split-index &&
  88         git ls-files --stage >ls-files.actual &&
  89         cat >ls-files.expect <<-EOF &&
  90         100644 $EMPTY_BLOB 0    one
  91         EOF
  92         test_cmp ls-files.expect ls-files.actual &&
  93
  94         BASE=$(test-tool dump-split-index .git/index | sed -n "s/^own/base/p") &&
  95         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
  96         cat >expect <<-EOF &&
  97         not a split index
  98         EOF
  99         test_cmp expect actual
 100 '
 101
 102 test_expect_success 'enable split index again, "one" now belongs to base index"' '
 103         git update-index --split-index &&
 104         git ls-files --stage >ls-files.actual &&
 105         cat >ls-files.expect <<-EOF &&
 106         100644 $EMPTY_BLOB 0    one
 107         EOF
 108         test_cmp ls-files.expect ls-files.actual &&
 109
 110         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 111         cat >expect <<-EOF &&
 112         $BASE
 113         replacements:
 114         deletions:
 115         EOF
 116         test_cmp expect actual
 117 '
 118
 119 test_expect_success 'modify original file, base index untouched' '
 120         echo modified | create_non_racy_file one &&
 121         file1_blob=$(git hash-object one) &&
 122         git update-index one &&
 123         git ls-files --stage >ls-files.actual &&
 124         cat >ls-files.expect <<-EOF &&
 125         100644 $file1_blob 0    one
 126         EOF
 127         test_cmp ls-files.expect ls-files.actual &&
 128
 129         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 130         q_to_tab >expect <<-EOF &&
 131         $BASE
 132         100644 $file1_blob 0Q
 133         replacements: 0
 134         deletions:
 135         EOF
 136         test_cmp expect actual
 137 '
 138
 139 test_expect_success 'add another file, which stays index' '
 140         create_non_racy_file two &&
 141         git update-index --add two &&
 142         git ls-files --stage >ls-files.actual &&
 143         cat >ls-files.expect <<-EOF &&
 144         100644 $file1_blob 0    one
 145         100644 $EMPTY_BLOB 0    two
 146         EOF
 147         test_cmp ls-files.expect ls-files.actual &&
 148
 149         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 150         q_to_tab >expect <<-EOF &&
 151         $BASE
 152         100644 $file1_blob 0Q
 153         100644 $EMPTY_BLOB 0    two
 154         replacements: 0
 155         deletions:
 156         EOF
 157         test_cmp expect actual
 158 '
 159
 160 test_expect_success 'remove file not in base index' '
 161         git update-index --force-remove two &&
 162         git ls-files --stage >ls-files.actual &&
 163         cat >ls-files.expect <<-EOF &&
 164         100644 $file1_blob 0    one
 165         EOF
 166         test_cmp ls-files.expect ls-files.actual &&
 167
 168         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 169         q_to_tab >expect <<-EOF &&
 170         $BASE
 171         100644 $file1_blob 0Q
 172         replacements: 0
 173         deletions:
 174         EOF
 175         test_cmp expect actual
 176 '
 177
 178 test_expect_success 'remove file in base index' '
 179         git update-index --force-remove one &&
 180         git ls-files --stage >ls-files.actual &&
 181         test_must_be_empty ls-files.actual &&
 182
 183         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 184         cat >expect <<-EOF &&
 185         $BASE
 186         replacements:
 187         deletions: 0
 188         EOF
 189         test_cmp expect actual
 190 '
 191
 192 test_expect_success 'add original file back' '
 193         create_non_racy_file one &&
 194         git update-index --add one &&
 195         git ls-files --stage >ls-files.actual &&
 196         cat >ls-files.expect <<-EOF &&
 197         100644 $EMPTY_BLOB 0    one
 198         EOF
 199         test_cmp ls-files.expect ls-files.actual &&
 200
 201         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 202         cat >expect <<-EOF &&
 203         $BASE
 204         100644 $EMPTY_BLOB 0    one
 205         replacements:
 206         deletions: 0
 207         EOF
 208         test_cmp expect actual
 209 '
 210
 211 test_expect_success 'add new file' '
 212         create_non_racy_file two &&
 213         git update-index --add two &&
 214         git ls-files --stage >actual &&
 215         cat >expect <<-EOF &&
 216         100644 $EMPTY_BLOB 0    one
 217         100644 $EMPTY_BLOB 0    two
 218         EOF
 219         test_cmp expect actual
 220 '
 221
 222 test_expect_success 'unify index, two files remain' '
 223         git update-index --no-split-index &&
 224         git ls-files --stage >ls-files.actual &&
 225         cat >ls-files.expect <<-EOF &&
 226         100644 $EMPTY_BLOB 0    one
 227         100644 $EMPTY_BLOB 0    two
 228         EOF
 229         test_cmp ls-files.expect ls-files.actual &&
 230
 231         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 232         cat >expect <<-EOF &&
 233         not a split index
 234         EOF
 235         test_cmp expect actual
 236 '
 237
 238 test_expect_success 'rev-parse --shared-index-path' '
 239         test_create_repo split-index &&
 240         (
 241                 cd split-index &&
 242                 git update-index --split-index &&
 243                 echo .git/sharedindex* >expect &&
 244                 git rev-parse --shared-index-path >actual &&
 245                 test_cmp expect actual &&
 246                 mkdir subdirectory &&
 247                 cd subdirectory &&
 248                 echo ../.git/sharedindex* >expect &&
 249                 git rev-parse --shared-index-path >actual &&
 250                 test_cmp expect actual
 251         )
 252 '
 253
 254 test_expect_success 'set core.splitIndex config variable to true' '
 255         git config core.splitIndex true &&
 256         create_non_racy_file three &&
 257         git update-index --add three &&
 258         git ls-files --stage >ls-files.actual &&
 259         cat >ls-files.expect <<-EOF &&
 260         100644 $EMPTY_BLOB 0    one
 261         100644 $EMPTY_BLOB 0    three
 262         100644 $EMPTY_BLOB 0    two
 263         EOF
 264         test_cmp ls-files.expect ls-files.actual &&
 265         BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
 266         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 267         cat >expect <<-EOF &&
 268         $BASE
 269         replacements:
 270         deletions:
 271         EOF
 272         test_cmp expect actual
 273 '
 274
 275 test_expect_success 'set core.splitIndex config variable to false' '
 276         git config core.splitIndex false &&
 277         git update-index --force-remove three &&
 278         git ls-files --stage >ls-files.actual &&
 279         cat >ls-files.expect <<-EOF &&
 280         100644 $EMPTY_BLOB 0    one
 281         100644 $EMPTY_BLOB 0    two
 282         EOF
 283         test_cmp ls-files.expect ls-files.actual &&
 284         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 285         cat >expect <<-EOF &&
 286         not a split index
 287         EOF
 288         test_cmp expect actual
 289 '
 290
 291 test_expect_success 'set core.splitIndex config variable back to true' '
 292         git config core.splitIndex true &&
 293         create_non_racy_file three &&
 294         git update-index --add three &&
 295         BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
 296         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 297         cat >expect <<-EOF &&
 298         $BASE
 299         replacements:
 300         deletions:
 301         EOF
 302         test_cmp expect actual &&
 303         create_non_racy_file four &&
 304         git update-index --add four &&
 305         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 306         cat >expect <<-EOF &&
 307         $BASE
 308         100644 $EMPTY_BLOB 0    four
 309         replacements:
 310         deletions:
 311         EOF
 312         test_cmp expect actual
 313 '
 314
 315 test_expect_success 'check behavior with splitIndex.maxPercentChange unset' '
 316         git config --unset splitIndex.maxPercentChange &&
 317         create_non_racy_file five &&
 318         git update-index --add five &&
 319         BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
 320         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 321         cat >expect <<-EOF &&
 322         $BASE
 323         replacements:
 324         deletions:
 325         EOF
 326         test_cmp expect actual &&
 327         create_non_racy_file six &&
 328         git update-index --add six &&
 329         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 330         cat >expect <<-EOF &&
 331         $BASE
 332         100644 $EMPTY_BLOB 0    six
 333         replacements:
 334         deletions:
 335         EOF
 336         test_cmp expect actual
 337 '
 338
 339 test_expect_success 'check splitIndex.maxPercentChange set to 0' '
 340         git config splitIndex.maxPercentChange 0 &&
 341         create_non_racy_file seven &&
 342         git update-index --add seven &&
 343         BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
 344         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 345         cat >expect <<-EOF &&
 346         $BASE
 347         replacements:
 348         deletions:
 349         EOF
 350         test_cmp expect actual &&
 351         create_non_racy_file eight &&
 352         git update-index --add eight &&
 353         BASE=$(test-tool dump-split-index .git/index | grep "^base") &&
 354         test-tool dump-split-index .git/index | sed "/^own/d" >actual &&
 355         cat >expect <<-EOF &&
 356         $BASE
 357         replacements:
 358         deletions:
 359         EOF
 360         test_cmp expect actual
 361 '
 362
 363 test_expect_success 'shared index files expire after 2 weeks by default' '
 364         create_non_racy_file ten &&
 365         git update-index --add ten &&
 366         test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
 367         just_under_2_weeks_ago=$((5-14*86400)) &&
 368         test-tool chmtime =$just_under_2_weeks_ago .git/sharedindex.* &&
 369         create_non_racy_file eleven &&
 370         git update-index --add eleven &&
 371         test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
 372         just_over_2_weeks_ago=$((-1-14*86400)) &&
 373         test-tool chmtime =$just_over_2_weeks_ago .git/sharedindex.* &&
 374         create_non_racy_file twelve &&
 375         git update-index --add twelve &&
 376         test $(ls .git/sharedindex.* | wc -l) -le 2
 377 '
 378
 379 test_expect_success 'check splitIndex.sharedIndexExpire set to 16 days' '
 380         git config splitIndex.sharedIndexExpire "16.days.ago" &&
 381         test-tool chmtime =$just_over_2_weeks_ago .git/sharedindex.* &&
 382         create_non_racy_file thirteen &&
 383         git update-index --add thirteen &&
 384         test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
 385         just_over_16_days_ago=$((-1-16*86400)) &&
 386         test-tool chmtime =$just_over_16_days_ago .git/sharedindex.* &&
 387         create_non_racy_file fourteen &&
 388         git update-index --add fourteen &&
 389         test $(ls .git/sharedindex.* | wc -l) -le 2
 390 '
 391
 392 test_expect_success 'check splitIndex.sharedIndexExpire set to "never" and "now"' '
 393         git config splitIndex.sharedIndexExpire never &&
 394         just_10_years_ago=$((-365*10*86400)) &&
 395         test-tool chmtime =$just_10_years_ago .git/sharedindex.* &&
 396         create_non_racy_file fifteen &&
 397         git update-index --add fifteen &&
 398         test $(ls .git/sharedindex.* | wc -l) -gt 2 &&
 399         git config splitIndex.sharedIndexExpire now &&
 400         just_1_second_ago=-1 &&
 401         test-tool chmtime =$just_1_second_ago .git/sharedindex.* &&
 402         create_non_racy_file sixteen &&
 403         git update-index --add sixteen &&
 404         test $(ls .git/sharedindex.* | wc -l) -le 2
 405 '
 406
 407 test_expect_success POSIXPERM 'same mode for index & split index' '
 408         git init same-mode &&
 409         (
 410                 cd same-mode &&
 411                 test_commit A &&
 412                 test_modebits .git/index >index_mode &&
 413                 test_must_fail git config core.sharedRepository &&
 414                 git -c core.splitIndex=true status &&
 415                 shared=$(ls .git/sharedindex.*) &&
 416                 case "$shared" in
 417                 *" "*)
 418                         # we have more than one???
 419                         false ;;
 420                 *)
 421                         test_modebits "$shared" >split_index_mode &&
 422                         test_cmp index_mode split_index_mode ;;
 423                 esac
 424         )
 425 '
 426
 427 while read -r mode modebits
 428 do
 429         test_expect_success POSIXPERM "split index respects core.sharedrepository $mode" '
 430                 # Remove existing shared index files
 431                 git config core.splitIndex false &&
 432                 git update-index --force-remove one &&
 433                 rm -f .git/sharedindex.* &&
 434                 # Create one new shared index file
 435                 git config core.sharedrepository "$mode" &&
 436                 git config core.splitIndex true &&
 437                 create_non_racy_file one &&
 438                 git update-index --add one &&
 439                 echo "$modebits" >expect &&
 440                 test_modebits .git/index >actual &&
 441                 test_cmp expect actual &&
 442                 shared=$(ls .git/sharedindex.*) &&
 443                 case "$shared" in
 444                 *" "*)
 445                         # we have more than one???
 446                         false ;;
 447                 *)
 448                         test_modebits "$shared" >actual &&
 449                         test_cmp expect actual ;;
 450                 esac
 451         '
 452 done <<\EOF
 453 0666 -rw-rw-rw-
 454 0642 -rw-r---w-
 455 EOF
 456
 457 test_expect_success POSIXPERM,SANITY 'graceful handling when splitting index is not allowed' '
 458         test_create_repo ro &&
 459         (
 460                 cd ro &&
 461                 test_commit initial &&
 462                 git update-index --split-index &&
 463                 test -f .git/sharedindex.*
 464         ) &&
 465         cp ro/.git/index new-index &&
 466         test_when_finished "chmod u+w ro/.git" &&
 467         chmod u-w ro/.git &&
 468         GIT_INDEX_FILE="$(pwd)/new-index" git -C ro update-index --split-index &&
 469         chmod u+w ro/.git &&
 470         rm ro/.git/sharedindex.* &&
 471         GIT_INDEX_FILE=new-index git ls-files >actual &&
 472         echo initial.t >expected &&
 473         test_cmp expected actual
 474 '
 475
 476 test_expect_success 'writing split index with null sha1 does not write cache tree' '
 477         git config core.splitIndex true &&
 478         git config splitIndex.maxPercentChange 0 &&
 479         git commit -m "commit" &&
 480         {
 481                 git ls-tree HEAD &&
 482                 printf "160000 commit $ZERO_OID\\tbroken\\n"
 483         } >broken-tree &&
 484         echo "add broken entry" >msg &&
 485
 486         tree=$(git mktree <broken-tree) &&
 487         test_tick &&
 488         commit=$(git commit-tree $tree -p HEAD <msg) &&
 489         git update-ref HEAD "$commit" &&
 490         GIT_ALLOW_NULL_SHA1=1 git reset --hard &&
 491         test_might_fail test-tool dump-cache-tree >cache-tree.out &&
 492         test_line_count = 0 cache-tree.out
 493 '
 494
 495 test_expect_success 'do not refresh null base index' '
 496         test_create_repo merge &&
 497         (
 498                 cd merge &&
 499                 test_commit initial &&
 500                 git checkout -b side-branch &&
 501                 test_commit extra &&
 502                 git checkout main &&
 503                 git update-index --split-index &&
 504                 test_commit more &&
 505                 # must not write a new shareindex, or we wont catch the problem
 506                 git -c splitIndex.maxPercentChange=100 merge --no-edit side-branch 2>err &&
 507                 # i.e. do not expect warnings like
 508                 # could not freshen shared index .../shareindex.00000...
 509                 test_must_be_empty err
 510         )
 511 '
 512
 513 test_expect_success 'reading split index at alternate location' '
 514         git init reading-alternate-location &&
 515         (
 516                 cd reading-alternate-location &&
 517                 >file-in-alternate &&
 518                 git update-index --split-index --add file-in-alternate
 519         ) &&
 520         echo file-in-alternate >expect &&
 521
 522         # Should be able to find the shared index both right next to
 523         # the specified split index file ...
 524         GIT_INDEX_FILE=./reading-alternate-location/.git/index \
 525         git ls-files --cached >actual &&
 526         test_cmp expect actual &&
 527
 528         # ... and, for backwards compatibility, in the current GIT_DIR
 529         # as well.
 530         mv ./reading-alternate-location/.git/sharedindex.* .git &&
 531         GIT_INDEX_FILE=./reading-alternate-location/.git/index \
 532         git ls-files --cached >actual &&
 533         test_cmp expect actual
 534 '
 535
 536 test_expect_success 'GIT_TEST_SPLIT_INDEX works' '
 537         git init git-test-split-index &&
 538         (
 539                 cd git-test-split-index &&
 540                 >file &&
 541                 GIT_TEST_SPLIT_INDEX=1 git update-index --add file &&
 542                 ls -l .git/sharedindex.* >actual &&
 543                 test_line_count = 1 actual
 544         )
 545 '
 546
 547 test_done