t/t5318-commit-graph.sh

   1 #!/bin/sh
   2
   3 test_description='commit graph'
   4 . ./test-lib.sh
   5
   6 GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
   7
   8 test_expect_success 'usage' '
   9         test_expect_code 129 git commit-graph write blah 2>err &&
  10         test_expect_code 129 git commit-graph write verify
  11 '
  12
  13 test_expect_success 'usage shown without sub-command' '
  14         test_expect_code 129 git commit-graph 2>err &&
  15         ! grep error: err
  16 '
  17
  18 test_expect_success 'usage shown with an error on unknown sub-command' '
  19         cat >expect <<-\EOF &&
  20         error: unrecognized subcommand: unknown
  21         EOF
  22         test_expect_code 129 git commit-graph unknown 2>stderr &&
  23         grep error stderr >actual &&
  24         test_cmp expect actual
  25 '
  26
  27 test_expect_success 'setup full repo' '
  28         mkdir full &&
  29         cd "$TRASH_DIRECTORY/full" &&
  30         git init &&
  31         git config core.commitGraph true &&
  32         objdir=".git/objects" &&
  33
  34         test_oid_cache <<-EOF
  35         oid_version sha1:1
  36         oid_version sha256:2
  37         EOF
  38 '
  39
  40 test_expect_success POSIXPERM 'tweak umask for modebit tests' '
  41         umask 022
  42 '
  43
  44 test_expect_success 'verify graph with no graph file' '
  45         cd "$TRASH_DIRECTORY/full" &&
  46         git commit-graph verify
  47 '
  48
  49 test_expect_success 'write graph with no packs' '
  50         cd "$TRASH_DIRECTORY/full" &&
  51         git commit-graph write --object-dir $objdir &&
  52         test_path_is_missing $objdir/info/commit-graph
  53 '
  54
  55 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
  56         cd "$TRASH_DIRECTORY/full" &&
  57         echo doesnotexist >in &&
  58         test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
  59         test_i18ngrep "error adding pack" stderr
  60 '
  61
  62 test_expect_success 'create commits and repack' '
  63         cd "$TRASH_DIRECTORY/full" &&
  64         for i in $(test_seq 3)
  65         do
  66                 test_commit $i &&
  67                 git branch commits/$i || return 1
  68         done &&
  69         git repack
  70 '
  71
  72 graph_git_two_modes() {
  73         git -c core.commitGraph=true $1 >output &&
  74         git -c core.commitGraph=false $1 >expect &&
  75         test_cmp expect output
  76 }
  77
  78 graph_git_behavior() {
  79         MSG=$1
  80         DIR=$2
  81         BRANCH=$3
  82         COMPARE=$4
  83         test_expect_success "check normal git operations: $MSG" '
  84                 cd "$TRASH_DIRECTORY/$DIR" &&
  85                 graph_git_two_modes "log --oneline $BRANCH" &&
  86                 graph_git_two_modes "log --topo-order $BRANCH" &&
  87                 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
  88                 graph_git_two_modes "branch -vv" &&
  89                 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
  90         '
  91 }
  92
  93 graph_git_behavior 'no graph' full commits/3 commits/1
  94
  95 graph_read_expect() {
  96         OPTIONAL=""
  97         NUM_CHUNKS=3
  98         if test ! -z "$2"
  99         then
 100                 OPTIONAL=" $2"
 101                 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
 102         fi
 103         cat >expect <<- EOF
 104         header: 43475048 1 $(test_oid oid_version) $NUM_CHUNKS 0
 105         num_commits: $1
 106         chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
 107         EOF
 108         test-tool read-graph >output &&
 109         test_cmp expect output
 110 }
 111
 112 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
 113         cd "$TRASH_DIRECTORY/full" &&
 114         # invalid, non-hex OID
 115         echo HEAD >in &&
 116         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
 117         test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
 118         # non-existent OID
 119         echo $ZERO_OID >in &&
 120         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
 121         test_i18ngrep "invalid object" stderr &&
 122         # valid commit and tree OID
 123         git rev-parse HEAD HEAD^{tree} >in &&
 124         git commit-graph write --stdin-commits <in &&
 125         graph_read_expect 3 generation_data
 126 '
 127
 128 test_expect_success 'write graph' '
 129         cd "$TRASH_DIRECTORY/full" &&
 130         git commit-graph write &&
 131         test_path_is_file $objdir/info/commit-graph &&
 132         graph_read_expect "3" generation_data
 133 '
 134
 135 test_expect_success POSIXPERM 'write graph has correct permissions' '
 136         test_path_is_file $objdir/info/commit-graph &&
 137         echo "-r--r--r--" >expect &&
 138         test_modebits $objdir/info/commit-graph >actual &&
 139         test_cmp expect actual
 140 '
 141
 142 graph_git_behavior 'graph exists' full commits/3 commits/1
 143
 144 test_expect_success 'Add more commits' '
 145         cd "$TRASH_DIRECTORY/full" &&
 146         git reset --hard commits/1 &&
 147         for i in $(test_seq 4 5)
 148         do
 149                 test_commit $i &&
 150                 git branch commits/$i || return 1
 151         done &&
 152         git reset --hard commits/2 &&
 153         for i in $(test_seq 6 7)
 154         do
 155                 test_commit $i &&
 156                 git branch commits/$i || return 1
 157         done &&
 158         git reset --hard commits/2 &&
 159         git merge commits/4 &&
 160         git branch merge/1 &&
 161         git reset --hard commits/4 &&
 162         git merge commits/6 &&
 163         git branch merge/2 &&
 164         git reset --hard commits/3 &&
 165         git merge commits/5 commits/7 &&
 166         git branch merge/3 &&
 167         git repack
 168 '
 169
 170 test_expect_success 'commit-graph write progress off for redirected stderr' '
 171         cd "$TRASH_DIRECTORY/full" &&
 172         git commit-graph write 2>err &&
 173         test_must_be_empty err
 174 '
 175
 176 test_expect_success 'commit-graph write force progress on for stderr' '
 177         cd "$TRASH_DIRECTORY/full" &&
 178         GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
 179         test_file_not_empty err
 180 '
 181
 182 test_expect_success 'commit-graph write with the --no-progress option' '
 183         cd "$TRASH_DIRECTORY/full" &&
 184         git commit-graph write --no-progress 2>err &&
 185         test_must_be_empty err
 186 '
 187
 188 test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
 189         cd "$TRASH_DIRECTORY/full" &&
 190         git rev-parse commits/5 >in &&
 191         git commit-graph write --stdin-commits <in 2>err &&
 192         test_must_be_empty err
 193 '
 194
 195 test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
 196         cd "$TRASH_DIRECTORY/full" &&
 197         git rev-parse commits/5 >in &&
 198         GIT_PROGRESS_DELAY=0 git commit-graph write --stdin-commits --progress <in 2>err &&
 199         test_i18ngrep "Collecting commits from input" err
 200 '
 201
 202 test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
 203         cd "$TRASH_DIRECTORY/full" &&
 204         git rev-parse commits/5 >in &&
 205         git commit-graph write --stdin-commits --no-progress <in 2>err &&
 206         test_must_be_empty err
 207 '
 208
 209 test_expect_success 'commit-graph verify progress off for redirected stderr' '
 210         cd "$TRASH_DIRECTORY/full" &&
 211         git commit-graph verify 2>err &&
 212         test_must_be_empty err
 213 '
 214
 215 test_expect_success 'commit-graph verify force progress on for stderr' '
 216         cd "$TRASH_DIRECTORY/full" &&
 217         GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
 218         test_file_not_empty err
 219 '
 220
 221 test_expect_success 'commit-graph verify with the --no-progress option' '
 222         cd "$TRASH_DIRECTORY/full" &&
 223         git commit-graph verify --no-progress 2>err &&
 224         test_must_be_empty err
 225 '
 226
 227 # Current graph structure:
 228 #
 229 #   __M3___
 230 #  /   |   \
 231 # 3 M1 5 M2 7
 232 # |/  \|/  \|
 233 # 2    4    6
 234 # |___/____/
 235 # 1
 236
 237 test_expect_success 'write graph with merges' '
 238         cd "$TRASH_DIRECTORY/full" &&
 239         git commit-graph write &&
 240         test_path_is_file $objdir/info/commit-graph &&
 241         graph_read_expect "10" "generation_data extra_edges"
 242 '
 243
 244 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 245 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 246 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 247
 248 test_expect_success 'Add one more commit' '
 249         cd "$TRASH_DIRECTORY/full" &&
 250         test_commit 8 &&
 251         git branch commits/8 &&
 252         ls $objdir/pack | grep idx >existing-idx &&
 253         git repack &&
 254         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 255 '
 256
 257 # Current graph structure:
 258 #
 259 #      8
 260 #      |
 261 #   __M3___
 262 #  /   |   \
 263 # 3 M1 5 M2 7
 264 # |/  \|/  \|
 265 # 2    4    6
 266 # |___/____/
 267 # 1
 268
 269 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 270 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 271
 272 test_expect_success 'write graph with new commit' '
 273         cd "$TRASH_DIRECTORY/full" &&
 274         git commit-graph write &&
 275         test_path_is_file $objdir/info/commit-graph &&
 276         graph_read_expect "11" "generation_data extra_edges"
 277 '
 278
 279 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 280 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 281
 282 test_expect_success 'write graph with nothing new' '
 283         cd "$TRASH_DIRECTORY/full" &&
 284         git commit-graph write &&
 285         test_path_is_file $objdir/info/commit-graph &&
 286         graph_read_expect "11" "generation_data extra_edges"
 287 '
 288
 289 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 290 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 291
 292 test_expect_success 'build graph from latest pack with closure' '
 293         cd "$TRASH_DIRECTORY/full" &&
 294         cat new-idx | git commit-graph write --stdin-packs &&
 295         test_path_is_file $objdir/info/commit-graph &&
 296         graph_read_expect "9" "generation_data extra_edges"
 297 '
 298
 299 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 300 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 301
 302 test_expect_success 'build graph from commits with closure' '
 303         cd "$TRASH_DIRECTORY/full" &&
 304         git tag -a -m "merge" tag/merge merge/2 &&
 305         git rev-parse tag/merge >commits-in &&
 306         git rev-parse merge/1 >>commits-in &&
 307         cat commits-in | git commit-graph write --stdin-commits &&
 308         test_path_is_file $objdir/info/commit-graph &&
 309         graph_read_expect "6" "generation_data"
 310 '
 311
 312 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 313 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 314
 315 test_expect_success 'build graph from commits with append' '
 316         cd "$TRASH_DIRECTORY/full" &&
 317         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 318         test_path_is_file $objdir/info/commit-graph &&
 319         graph_read_expect "10" "generation_data extra_edges"
 320 '
 321
 322 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 323 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 324
 325 test_expect_success 'build graph using --reachable' '
 326         cd "$TRASH_DIRECTORY/full" &&
 327         git commit-graph write --reachable &&
 328         test_path_is_file $objdir/info/commit-graph &&
 329         graph_read_expect "11" "generation_data extra_edges"
 330 '
 331
 332 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 333 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 334
 335 test_expect_success 'setup bare repo' '
 336         cd "$TRASH_DIRECTORY" &&
 337         git clone --bare --no-local full bare &&
 338         cd bare &&
 339         git config core.commitGraph true &&
 340         baredir="./objects"
 341 '
 342
 343 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 344 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 345
 346 test_expect_success 'write graph in bare repo' '
 347         cd "$TRASH_DIRECTORY/bare" &&
 348         git commit-graph write &&
 349         test_path_is_file $baredir/info/commit-graph &&
 350         graph_read_expect "11" "generation_data extra_edges"
 351 '
 352
 353 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 354 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 355
 356 test_expect_success 'perform fast-forward merge in full repo' '
 357         cd "$TRASH_DIRECTORY/full" &&
 358         git checkout -b merge-5-to-8 commits/5 &&
 359         git merge commits/8 &&
 360         git show-ref -s merge-5-to-8 >output &&
 361         git show-ref -s commits/8 >expect &&
 362         test_cmp expect output
 363 '
 364
 365 test_expect_success 'check that gc computes commit-graph' '
 366         cd "$TRASH_DIRECTORY/full" &&
 367         git commit --allow-empty -m "blank" &&
 368         git commit-graph write --reachable &&
 369         cp $objdir/info/commit-graph commit-graph-before-gc &&
 370         git reset --hard HEAD~1 &&
 371         git config gc.writeCommitGraph true &&
 372         git gc &&
 373         cp $objdir/info/commit-graph commit-graph-after-gc &&
 374         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 375         git commit-graph write --reachable &&
 376         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 377 '
 378
 379 test_expect_success 'replace-objects invalidates commit-graph' '
 380         cd "$TRASH_DIRECTORY" &&
 381         test_when_finished rm -rf replace &&
 382         git clone full replace &&
 383         (
 384                 cd replace &&
 385                 git commit-graph write --reachable &&
 386                 test_path_is_file .git/objects/info/commit-graph &&
 387                 git replace HEAD~1 HEAD~2 &&
 388                 graph_git_two_modes "commit-graph verify" &&
 389                 git -c core.commitGraph=false log >expect &&
 390                 git -c core.commitGraph=true log >actual &&
 391                 test_cmp expect actual &&
 392                 git commit-graph write --reachable &&
 393                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 394                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 395                 test_cmp expect actual &&
 396                 rm -rf .git/objects/info/commit-graph &&
 397                 git commit-graph write --reachable &&
 398                 test_path_is_file .git/objects/info/commit-graph
 399         )
 400 '
 401
 402 test_expect_success 'commit grafts invalidate commit-graph' '
 403         cd "$TRASH_DIRECTORY" &&
 404         test_when_finished rm -rf graft &&
 405         git clone full graft &&
 406         (
 407                 cd graft &&
 408                 git commit-graph write --reachable &&
 409                 test_path_is_file .git/objects/info/commit-graph &&
 410                 H1=$(git rev-parse --verify HEAD~1) &&
 411                 H3=$(git rev-parse --verify HEAD~3) &&
 412                 echo "$H1 $H3" >.git/info/grafts &&
 413                 git -c core.commitGraph=false log >expect &&
 414                 git -c core.commitGraph=true log >actual &&
 415                 test_cmp expect actual &&
 416                 git commit-graph write --reachable &&
 417                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 418                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 419                 test_cmp expect actual &&
 420                 rm -rf .git/objects/info/commit-graph &&
 421                 git commit-graph write --reachable &&
 422                 test_path_is_missing .git/objects/info/commit-graph
 423         )
 424 '
 425
 426 test_expect_success 'replace-objects invalidates commit-graph' '
 427         cd "$TRASH_DIRECTORY" &&
 428         test_when_finished rm -rf shallow &&
 429         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 430         (
 431                 cd shallow &&
 432                 git commit-graph write --reachable &&
 433                 test_path_is_missing .git/objects/info/commit-graph &&
 434                 git fetch origin --unshallow &&
 435                 git commit-graph write --reachable &&
 436                 test_path_is_file .git/objects/info/commit-graph
 437         )
 438 '
 439
 440 test_expect_success 'warn on improper hash version' '
 441         git init --object-format=sha1 sha1 &&
 442         (
 443                 cd sha1 &&
 444                 test_commit 1 &&
 445                 git commit-graph write --reachable &&
 446                 mv .git/objects/info/commit-graph ../cg-sha1
 447         ) &&
 448         git init --object-format=sha256 sha256 &&
 449         (
 450                 cd sha256 &&
 451                 test_commit 1 &&
 452                 git commit-graph write --reachable &&
 453                 mv .git/objects/info/commit-graph ../cg-sha256
 454         ) &&
 455         (
 456                 cd sha1 &&
 457                 mv ../cg-sha256 .git/objects/info/commit-graph &&
 458                 git log -1 2>err &&
 459                 test_i18ngrep "commit-graph hash version 2 does not match version 1" err
 460         ) &&
 461         (
 462                 cd sha256 &&
 463                 mv ../cg-sha1 .git/objects/info/commit-graph &&
 464                 git log -1 2>err &&
 465                 test_i18ngrep "commit-graph hash version 1 does not match version 2" err
 466         )
 467 '
 468
 469 test_expect_success 'lower layers have overflow chunk' '
 470         cd "$TRASH_DIRECTORY/full" &&
 471         UNIX_EPOCH_ZERO="@0 +0000" &&
 472         FUTURE_DATE="@2147483646 +0000" &&
 473         rm -f .git/objects/info/commit-graph &&
 474         test_commit --date "$FUTURE_DATE" future-1 &&
 475         test_commit --date "$UNIX_EPOCH_ZERO" old-1 &&
 476         git commit-graph write --reachable &&
 477         test_commit --date "$FUTURE_DATE" future-2 &&
 478         test_commit --date "$UNIX_EPOCH_ZERO" old-2 &&
 479         git commit-graph write --reachable --split=no-merge &&
 480         test_commit extra &&
 481         git commit-graph write --reachable --split=no-merge &&
 482         git commit-graph write --reachable &&
 483         graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
 484         mv .git/objects/info/commit-graph commit-graph-upgraded &&
 485         git commit-graph write --reachable &&
 486         graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
 487         test_cmp .git/objects/info/commit-graph commit-graph-upgraded
 488 '
 489
 490 # the verify tests below expect the commit-graph to contain
 491 # exactly the commits reachable from the commits/8 branch.
 492 # If the file changes the set of commits in the list, then the
 493 # offsets into the binary file will result in different edits
 494 # and the tests will likely break.
 495
 496 test_expect_success 'git commit-graph verify' '
 497         cd "$TRASH_DIRECTORY/full" &&
 498         git rev-parse commits/8 | git -c commitGraph.generationVersion=1 commit-graph write --stdin-commits &&
 499         git commit-graph verify >output &&
 500         graph_read_expect 9 extra_edges
 501 '
 502
 503 NUM_COMMITS=9
 504 NUM_OCTOPUS_EDGES=2
 505 HASH_LEN="$(test_oid rawsz)"
 506 GRAPH_BYTE_VERSION=4
 507 GRAPH_BYTE_HASH=5
 508 GRAPH_BYTE_CHUNK_COUNT=6
 509 GRAPH_CHUNK_LOOKUP_OFFSET=8
 510 GRAPH_CHUNK_LOOKUP_WIDTH=12
 511 GRAPH_CHUNK_LOOKUP_ROWS=5
 512 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 513 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 514                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 515 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 516                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 517 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 518                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 519 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 520 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 521 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 522 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 523 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 524 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 525 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 526 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 527 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 528 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 529 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 530 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 531 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 532 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 533                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 534 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 535 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 536
 537 corrupt_graph_setup() {
 538         cd "$TRASH_DIRECTORY/full" &&
 539         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 540         cp $objdir/info/commit-graph commit-graph-backup &&
 541         chmod u+w $objdir/info/commit-graph
 542 }
 543
 544 corrupt_graph_verify() {
 545         grepstr=$1
 546         test_must_fail git commit-graph verify 2>test_err &&
 547         grep -v "^+" test_err >err &&
 548         test_i18ngrep "$grepstr" err &&
 549         if test "$2" != "no-copy"
 550         then
 551                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 552         fi &&
 553         git status --short &&
 554         GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git commit-graph write &&
 555         chmod u+w $objdir/info/commit-graph &&
 556         git commit-graph verify
 557 }
 558
 559 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 560 # Manipulates the commit-graph file at the position
 561 # by inserting the data, optionally zeroing the file
 562 # starting at <zero_pos>, then runs 'git commit-graph verify'
 563 # and places the output in the file 'err'. Test 'err' for
 564 # the given string.
 565 corrupt_graph_and_verify() {
 566         pos=$1
 567         data="${2:-\0}"
 568         grepstr=$3
 569         corrupt_graph_setup &&
 570         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 571         zero_pos=${4:-${orig_size}} &&
 572         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 573         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 574         test-tool genzeros $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 575         corrupt_graph_verify "$grepstr"
 576
 577 }
 578
 579 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 580         corrupt_graph_setup &&
 581         chmod 000 $objdir/info/commit-graph &&
 582         corrupt_graph_verify "Could not open" "no-copy"
 583 '
 584
 585 test_expect_success 'detect too small' '
 586         corrupt_graph_setup &&
 587         echo "a small graph" >$objdir/info/commit-graph &&
 588         corrupt_graph_verify "too small"
 589 '
 590
 591 test_expect_success 'detect bad signature' '
 592         corrupt_graph_and_verify 0 "\0" \
 593                 "graph signature"
 594 '
 595
 596 test_expect_success 'detect bad version' '
 597         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 598                 "graph version"
 599 '
 600
 601 test_expect_success 'detect bad hash version' '
 602         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 603                 "hash version"
 604 '
 605
 606 test_expect_success 'detect low chunk count' '
 607         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \
 608                 "final chunk has non-zero id"
 609 '
 610
 611 test_expect_success 'detect missing OID fanout chunk' '
 612         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 613                 "missing the OID Fanout chunk"
 614 '
 615
 616 test_expect_success 'detect missing OID lookup chunk' '
 617         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 618                 "missing the OID Lookup chunk"
 619 '
 620
 621 test_expect_success 'detect missing commit data chunk' '
 622         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 623                 "missing the Commit Data chunk"
 624 '
 625
 626 test_expect_success 'detect incorrect fanout' '
 627         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 628                 "fanout value"
 629 '
 630
 631 test_expect_success 'detect incorrect fanout final value' '
 632         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 633                 "fanout value"
 634 '
 635
 636 test_expect_success 'detect incorrect OID order' '
 637         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 638                 "incorrect OID order"
 639 '
 640
 641 test_expect_success 'detect OID not in object database' '
 642         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 643                 "from object database"
 644 '
 645
 646 test_expect_success 'detect incorrect tree OID' '
 647         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 648                 "root tree OID for commit"
 649 '
 650
 651 test_expect_success 'detect incorrect parent int-id' '
 652         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 653                 "invalid parent"
 654 '
 655
 656 test_expect_success 'detect extra parent int-id' '
 657         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 658                 "is too long"
 659 '
 660
 661 test_expect_success 'detect wrong parent' '
 662         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 663                 "commit-graph parent for"
 664 '
 665
 666 test_expect_success 'detect incorrect generation number' '
 667         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 668                 "generation for commit"
 669 '
 670
 671 test_expect_success 'detect incorrect generation number' '
 672         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 673                 "non-zero generation number"
 674 '
 675
 676 test_expect_success 'detect incorrect commit date' '
 677         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 678                 "commit date"
 679 '
 680
 681 test_expect_success 'detect incorrect parent for octopus merge' '
 682         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 683                 "invalid parent"
 684 '
 685
 686 test_expect_success 'detect invalid checksum hash' '
 687         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 688                 "incorrect checksum"
 689 '
 690
 691 test_expect_success 'detect incorrect chunk count' '
 692         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 693                 "commit-graph file is too small to hold [0-9]* chunks" \
 694                 $GRAPH_CHUNK_LOOKUP_OFFSET
 695 '
 696
 697 test_expect_success 'git fsck (checks commit-graph when config set to true)' '
 698         cd "$TRASH_DIRECTORY/full" &&
 699         git fsck &&
 700         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 701                 "incorrect checksum" &&
 702         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 703         test_must_fail git -c core.commitGraph=true fsck
 704 '
 705
 706 test_expect_success 'git fsck (ignores commit-graph when config set to false)' '
 707         cd "$TRASH_DIRECTORY/full" &&
 708         git fsck &&
 709         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 710                 "incorrect checksum" &&
 711         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 712         git -c core.commitGraph=false fsck
 713 '
 714
 715 test_expect_success 'git fsck (checks commit-graph when config unset)' '
 716         cd "$TRASH_DIRECTORY/full" &&
 717         test_when_finished "git config core.commitGraph true" &&
 718
 719         git fsck &&
 720         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 721                 "incorrect checksum" &&
 722         test_unconfig core.commitGraph &&
 723         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 724         test_must_fail git fsck
 725 '
 726
 727 test_expect_success 'setup non-the_repository tests' '
 728         rm -rf repo &&
 729         git init repo &&
 730         test_commit -C repo one &&
 731         test_commit -C repo two &&
 732         git -C repo config core.commitGraph true &&
 733         git -C repo rev-parse two | \
 734                 git -C repo commit-graph write --stdin-commits
 735 '
 736
 737 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 738         test-tool repository parse_commit_in_graph \
 739                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 740         {
 741                 git -C repo log --pretty=format:"%ct " -1 &&
 742                 git -C repo rev-parse one
 743         } >expect &&
 744         test_cmp expect actual &&
 745
 746         test-tool repository parse_commit_in_graph \
 747                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 748         git -C repo log --pretty="%ct" -1 one >expect &&
 749         test_cmp expect actual
 750 '
 751
 752 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 753         test-tool repository get_commit_tree_in_graph \
 754                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 755         git -C repo rev-parse two^{tree} >expect &&
 756         test_cmp expect actual &&
 757
 758         test-tool repository get_commit_tree_in_graph \
 759                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 760         git -C repo rev-parse one^{tree} >expect &&
 761         test_cmp expect actual
 762 '
 763
 764 test_expect_success 'corrupt commit-graph write (broken parent)' '
 765         rm -rf repo &&
 766         git init repo &&
 767         (
 768                 cd repo &&
 769                 empty="$(git mktree </dev/null)" &&
 770                 cat >broken <<-EOF &&
 771                 tree $empty
 772                 parent $ZERO_OID
 773                 author whatever <whatever@example.com> 1234 -0000
 774                 committer whatever <whatever@example.com> 1234 -0000
 775
 776                 broken commit
 777                 EOF
 778                 broken="$(git hash-object -w -t commit --literally broken)" &&
 779                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
 780                 test_must_fail git commit-graph write --stdin-commits \
 781                         <good 2>test_err &&
 782                 test_i18ngrep "unable to parse commit" test_err
 783         )
 784 '
 785
 786 test_expect_success 'corrupt commit-graph write (missing tree)' '
 787         rm -rf repo &&
 788         git init repo &&
 789         (
 790                 cd repo &&
 791                 tree="$(git mktree </dev/null)" &&
 792                 cat >broken <<-EOF &&
 793                 parent $ZERO_OID
 794                 author whatever <whatever@example.com> 1234 -0000
 795                 committer whatever <whatever@example.com> 1234 -0000
 796
 797                 broken commit
 798                 EOF
 799                 broken="$(git hash-object -w -t commit --literally broken)" &&
 800                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 801                 test_must_fail git commit-graph write --stdin-commits \
 802                         <good 2>test_err &&
 803                 test_i18ngrep "unable to parse commit" test_err
 804         )
 805 '
 806
 807 # We test the overflow-related code with the following repo history:
 808 #
 809 #               4:F - 5:N - 6:U
 810 #              /                \
 811 # 1:U - 2:N - 3:U                M:N
 812 #              \                /
 813 #               7:N - 8:F - 9:N
 814 #
 815 # Here the commits denoted by U have committer date of zero seconds
 816 # since Unix epoch, the commits denoted by N have committer date
 817 # starting from 1112354055 seconds since Unix epoch (default committer
 818 # date for the test suite), and the commits denoted by F have committer
 819 # date of (2 ^ 31 - 2) seconds since Unix epoch.
 820 #
 821 # The largest offset observed is 2 ^ 31, just large enough to overflow.
 822 #
 823
 824 test_expect_success 'set up and verify repo with generation data overflow chunk' '
 825         objdir=".git/objects" &&
 826         UNIX_EPOCH_ZERO="@0 +0000" &&
 827         FUTURE_DATE="@2147483646 +0000" &&
 828         test_oid_cache <<-EOF &&
 829         oid_version sha1:1
 830         oid_version sha256:2
 831         EOF
 832         cd "$TRASH_DIRECTORY" &&
 833         mkdir repo &&
 834         cd repo &&
 835         git init &&
 836         test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
 837         test_commit 2 &&
 838         test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
 839         git commit-graph write --reachable &&
 840         graph_read_expect 3 generation_data &&
 841         test_commit --date "$FUTURE_DATE" 4 &&
 842         test_commit 5 &&
 843         test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
 844         git branch left &&
 845         git reset --hard 3 &&
 846         test_commit 7 &&
 847         test_commit --date "$FUTURE_DATE" 8 &&
 848         test_commit 9 &&
 849         git branch right &&
 850         git reset --hard 3 &&
 851         test_merge M left right &&
 852         git commit-graph write --reachable &&
 853         graph_read_expect 10 "generation_data generation_data_overflow" &&
 854         git commit-graph verify
 855 '
 856
 857 graph_git_behavior 'generation data overflow chunk repo' repo left right
 858
 859 test_done