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
  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
 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
 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                 git -c core.commitGraph=false log >expect &&
 389                 git -c core.commitGraph=true log >actual &&
 390                 test_cmp expect actual &&
 391                 git commit-graph write --reachable &&
 392                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 393                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 394                 test_cmp expect actual &&
 395                 rm -rf .git/objects/info/commit-graph &&
 396                 git commit-graph write --reachable &&
 397                 test_path_is_file .git/objects/info/commit-graph
 398         )
 399 '
 400
 401 test_expect_success 'commit grafts invalidate commit-graph' '
 402         cd "$TRASH_DIRECTORY" &&
 403         test_when_finished rm -rf graft &&
 404         git clone full graft &&
 405         (
 406                 cd graft &&
 407                 git commit-graph write --reachable &&
 408                 test_path_is_file .git/objects/info/commit-graph &&
 409                 H1=$(git rev-parse --verify HEAD~1) &&
 410                 H3=$(git rev-parse --verify HEAD~3) &&
 411                 echo "$H1 $H3" >.git/info/grafts &&
 412                 git -c core.commitGraph=false log >expect &&
 413                 git -c core.commitGraph=true log >actual &&
 414                 test_cmp expect actual &&
 415                 git commit-graph write --reachable &&
 416                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 417                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 418                 test_cmp expect actual &&
 419                 rm -rf .git/objects/info/commit-graph &&
 420                 git commit-graph write --reachable &&
 421                 test_path_is_missing .git/objects/info/commit-graph
 422         )
 423 '
 424
 425 test_expect_success 'replace-objects invalidates commit-graph' '
 426         cd "$TRASH_DIRECTORY" &&
 427         test_when_finished rm -rf shallow &&
 428         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 429         (
 430                 cd shallow &&
 431                 git commit-graph write --reachable &&
 432                 test_path_is_missing .git/objects/info/commit-graph &&
 433                 git fetch origin --unshallow &&
 434                 git commit-graph write --reachable &&
 435                 test_path_is_file .git/objects/info/commit-graph
 436         )
 437 '
 438
 439 test_expect_success 'warn on improper hash version' '
 440         git init --object-format=sha1 sha1 &&
 441         (
 442                 cd sha1 &&
 443                 test_commit 1 &&
 444                 git commit-graph write --reachable &&
 445                 mv .git/objects/info/commit-graph ../cg-sha1
 446         ) &&
 447         git init --object-format=sha256 sha256 &&
 448         (
 449                 cd sha256 &&
 450                 test_commit 1 &&
 451                 git commit-graph write --reachable &&
 452                 mv .git/objects/info/commit-graph ../cg-sha256
 453         ) &&
 454         (
 455                 cd sha1 &&
 456                 mv ../cg-sha256 .git/objects/info/commit-graph &&
 457                 git log -1 2>err &&
 458                 test_i18ngrep "commit-graph hash version 2 does not match version 1" err
 459         ) &&
 460         (
 461                 cd sha256 &&
 462                 mv ../cg-sha1 .git/objects/info/commit-graph &&
 463                 git log -1 2>err &&
 464                 test_i18ngrep "commit-graph hash version 1 does not match version 2" err
 465         )
 466 '
 467
 468 test_expect_success 'lower layers have overflow chunk' '
 469         cd "$TRASH_DIRECTORY/full" &&
 470         UNIX_EPOCH_ZERO="@0 +0000" &&
 471         FUTURE_DATE="@2147483646 +0000" &&
 472         rm -f .git/objects/info/commit-graph &&
 473         test_commit --date "$FUTURE_DATE" future-1 &&
 474         test_commit --date "$UNIX_EPOCH_ZERO" old-1 &&
 475         git commit-graph write --reachable &&
 476         test_commit --date "$FUTURE_DATE" future-2 &&
 477         test_commit --date "$UNIX_EPOCH_ZERO" old-2 &&
 478         git commit-graph write --reachable --split=no-merge &&
 479         test_commit extra &&
 480         git commit-graph write --reachable --split=no-merge &&
 481         git commit-graph write --reachable &&
 482         graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
 483         mv .git/objects/info/commit-graph commit-graph-upgraded &&
 484         git commit-graph write --reachable &&
 485         graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
 486         test_cmp .git/objects/info/commit-graph commit-graph-upgraded
 487 '
 488
 489 # the verify tests below expect the commit-graph to contain
 490 # exactly the commits reachable from the commits/8 branch.
 491 # If the file changes the set of commits in the list, then the
 492 # offsets into the binary file will result in different edits
 493 # and the tests will likely break.
 494
 495 test_expect_success 'git commit-graph verify' '
 496         cd "$TRASH_DIRECTORY/full" &&
 497         git rev-parse commits/8 | git -c commitGraph.generationVersion=1 commit-graph write --stdin-commits &&
 498         git commit-graph verify >output &&
 499         graph_read_expect 9 extra_edges
 500 '
 501
 502 NUM_COMMITS=9
 503 NUM_OCTOPUS_EDGES=2
 504 HASH_LEN="$(test_oid rawsz)"
 505 GRAPH_BYTE_VERSION=4
 506 GRAPH_BYTE_HASH=5
 507 GRAPH_BYTE_CHUNK_COUNT=6
 508 GRAPH_CHUNK_LOOKUP_OFFSET=8
 509 GRAPH_CHUNK_LOOKUP_WIDTH=12
 510 GRAPH_CHUNK_LOOKUP_ROWS=5
 511 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 512 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 513                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 514 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 515                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 516 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 517                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 518 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 519 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 520 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 521 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 522 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 523 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 524 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 525 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 526 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 527 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 528 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 529 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 530 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 531 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 532                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 533 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 534 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 535
 536 corrupt_graph_setup() {
 537         cd "$TRASH_DIRECTORY/full" &&
 538         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 539         cp $objdir/info/commit-graph commit-graph-backup &&
 540         chmod u+w $objdir/info/commit-graph
 541 }
 542
 543 corrupt_graph_verify() {
 544         grepstr=$1
 545         test_must_fail git commit-graph verify 2>test_err &&
 546         grep -v "^+" test_err >err &&
 547         test_i18ngrep "$grepstr" err &&
 548         if test "$2" != "no-copy"
 549         then
 550                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 551         fi &&
 552         git status --short &&
 553         GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git commit-graph write &&
 554         chmod u+w $objdir/info/commit-graph &&
 555         git commit-graph verify
 556 }
 557
 558 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 559 # Manipulates the commit-graph file at the position
 560 # by inserting the data, optionally zeroing the file
 561 # starting at <zero_pos>, then runs 'git commit-graph verify'
 562 # and places the output in the file 'err'. Test 'err' for
 563 # the given string.
 564 corrupt_graph_and_verify() {
 565         pos=$1
 566         data="${2:-\0}"
 567         grepstr=$3
 568         corrupt_graph_setup &&
 569         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 570         zero_pos=${4:-${orig_size}} &&
 571         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 572         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 573         test-tool genzeros $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 574         corrupt_graph_verify "$grepstr"
 575
 576 }
 577
 578 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 579         corrupt_graph_setup &&
 580         chmod 000 $objdir/info/commit-graph &&
 581         corrupt_graph_verify "Could not open" "no-copy"
 582 '
 583
 584 test_expect_success 'detect too small' '
 585         corrupt_graph_setup &&
 586         echo "a small graph" >$objdir/info/commit-graph &&
 587         corrupt_graph_verify "too small"
 588 '
 589
 590 test_expect_success 'detect bad signature' '
 591         corrupt_graph_and_verify 0 "\0" \
 592                 "graph signature"
 593 '
 594
 595 test_expect_success 'detect bad version' '
 596         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 597                 "graph version"
 598 '
 599
 600 test_expect_success 'detect bad hash version' '
 601         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 602                 "hash version"
 603 '
 604
 605 test_expect_success 'detect low chunk count' '
 606         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \
 607                 "final chunk has non-zero id"
 608 '
 609
 610 test_expect_success 'detect missing OID fanout chunk' '
 611         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 612                 "missing the OID Fanout chunk"
 613 '
 614
 615 test_expect_success 'detect missing OID lookup chunk' '
 616         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 617                 "missing the OID Lookup chunk"
 618 '
 619
 620 test_expect_success 'detect missing commit data chunk' '
 621         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 622                 "missing the Commit Data chunk"
 623 '
 624
 625 test_expect_success 'detect incorrect fanout' '
 626         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 627                 "fanout value"
 628 '
 629
 630 test_expect_success 'detect incorrect fanout final value' '
 631         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 632                 "fanout value"
 633 '
 634
 635 test_expect_success 'detect incorrect OID order' '
 636         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 637                 "incorrect OID order"
 638 '
 639
 640 test_expect_success 'detect OID not in object database' '
 641         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 642                 "from object database"
 643 '
 644
 645 test_expect_success 'detect incorrect tree OID' '
 646         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 647                 "root tree OID for commit"
 648 '
 649
 650 test_expect_success 'detect incorrect parent int-id' '
 651         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 652                 "invalid parent"
 653 '
 654
 655 test_expect_success 'detect extra parent int-id' '
 656         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 657                 "is too long"
 658 '
 659
 660 test_expect_success 'detect wrong parent' '
 661         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 662                 "commit-graph parent for"
 663 '
 664
 665 test_expect_success 'detect incorrect generation number' '
 666         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 667                 "generation for commit"
 668 '
 669
 670 test_expect_success 'detect incorrect generation number' '
 671         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 672                 "non-zero generation number"
 673 '
 674
 675 test_expect_success 'detect incorrect commit date' '
 676         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 677                 "commit date"
 678 '
 679
 680 test_expect_success 'detect incorrect parent for octopus merge' '
 681         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 682                 "invalid parent"
 683 '
 684
 685 test_expect_success 'detect invalid checksum hash' '
 686         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 687                 "incorrect checksum"
 688 '
 689
 690 test_expect_success 'detect incorrect chunk count' '
 691         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 692                 "commit-graph file is too small to hold [0-9]* chunks" \
 693                 $GRAPH_CHUNK_LOOKUP_OFFSET
 694 '
 695
 696 test_expect_success 'git fsck (checks commit-graph)' '
 697         cd "$TRASH_DIRECTORY/full" &&
 698         git fsck &&
 699         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 700                 "incorrect checksum" &&
 701         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 702         test_must_fail git fsck
 703 '
 704
 705 test_expect_success 'setup non-the_repository tests' '
 706         rm -rf repo &&
 707         git init repo &&
 708         test_commit -C repo one &&
 709         test_commit -C repo two &&
 710         git -C repo config core.commitGraph true &&
 711         git -C repo rev-parse two | \
 712                 git -C repo commit-graph write --stdin-commits
 713 '
 714
 715 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 716         test-tool repository parse_commit_in_graph \
 717                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 718         {
 719                 git -C repo log --pretty=format:"%ct " -1 &&
 720                 git -C repo rev-parse one
 721         } >expect &&
 722         test_cmp expect actual &&
 723
 724         test-tool repository parse_commit_in_graph \
 725                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 726         git -C repo log --pretty="%ct" -1 one >expect &&
 727         test_cmp expect actual
 728 '
 729
 730 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 731         test-tool repository get_commit_tree_in_graph \
 732                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 733         git -C repo rev-parse two^{tree} >expect &&
 734         test_cmp expect actual &&
 735
 736         test-tool repository get_commit_tree_in_graph \
 737                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 738         git -C repo rev-parse one^{tree} >expect &&
 739         test_cmp expect actual
 740 '
 741
 742 test_expect_success 'corrupt commit-graph write (broken parent)' '
 743         rm -rf repo &&
 744         git init repo &&
 745         (
 746                 cd repo &&
 747                 empty="$(git mktree </dev/null)" &&
 748                 cat >broken <<-EOF &&
 749                 tree $empty
 750                 parent $ZERO_OID
 751                 author whatever <whatever@example.com> 1234 -0000
 752                 committer whatever <whatever@example.com> 1234 -0000
 753
 754                 broken commit
 755                 EOF
 756                 broken="$(git hash-object -w -t commit --literally broken)" &&
 757                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
 758                 test_must_fail git commit-graph write --stdin-commits \
 759                         <good 2>test_err &&
 760                 test_i18ngrep "unable to parse commit" test_err
 761         )
 762 '
 763
 764 test_expect_success 'corrupt commit-graph write (missing tree)' '
 765         rm -rf repo &&
 766         git init repo &&
 767         (
 768                 cd repo &&
 769                 tree="$(git mktree </dev/null)" &&
 770                 cat >broken <<-EOF &&
 771                 parent $ZERO_OID
 772                 author whatever <whatever@example.com> 1234 -0000
 773                 committer whatever <whatever@example.com> 1234 -0000
 774
 775                 broken commit
 776                 EOF
 777                 broken="$(git hash-object -w -t commit --literally broken)" &&
 778                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 779                 test_must_fail git commit-graph write --stdin-commits \
 780                         <good 2>test_err &&
 781                 test_i18ngrep "unable to parse commit" test_err
 782         )
 783 '
 784
 785 # We test the overflow-related code with the following repo history:
 786 #
 787 #               4:F - 5:N - 6:U
 788 #              /                \
 789 # 1:U - 2:N - 3:U                M:N
 790 #              \                /
 791 #               7:N - 8:F - 9:N
 792 #
 793 # Here the commits denoted by U have committer date of zero seconds
 794 # since Unix epoch, the commits denoted by N have committer date
 795 # starting from 1112354055 seconds since Unix epoch (default committer
 796 # date for the test suite), and the commits denoted by F have committer
 797 # date of (2 ^ 31 - 2) seconds since Unix epoch.
 798 #
 799 # The largest offset observed is 2 ^ 31, just large enough to overflow.
 800 #
 801
 802 test_expect_success 'set up and verify repo with generation data overflow chunk' '
 803         objdir=".git/objects" &&
 804         UNIX_EPOCH_ZERO="@0 +0000" &&
 805         FUTURE_DATE="@2147483646 +0000" &&
 806         test_oid_cache <<-EOF &&
 807         oid_version sha1:1
 808         oid_version sha256:2
 809         EOF
 810         cd "$TRASH_DIRECTORY" &&
 811         mkdir repo &&
 812         cd repo &&
 813         git init &&
 814         test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
 815         test_commit 2 &&
 816         test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
 817         git commit-graph write --reachable &&
 818         graph_read_expect 3 generation_data &&
 819         test_commit --date "$FUTURE_DATE" 4 &&
 820         test_commit 5 &&
 821         test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
 822         git branch left &&
 823         git reset --hard 3 &&
 824         test_commit 7 &&
 825         test_commit --date "$FUTURE_DATE" 8 &&
 826         test_commit 9 &&
 827         git branch right &&
 828         git reset --hard 3 &&
 829         test_merge M left right &&
 830         git commit-graph write --reachable &&
 831         graph_read_expect 10 "generation_data generation_data_overflow" &&
 832         git commit-graph verify
 833 '
 834
 835 graph_git_behavior 'generation data overflow chunk repo' repo left right
 836
 837 test_done