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 "$TRASH_DIRECTORY/full" &&
  30         git init &&
  31         git config core.commitGraph true &&
  32         objdir=".git/objects"
  33 '
  34
  35 test_expect_success POSIXPERM 'tweak umask for modebit tests' '
  36         umask 022
  37 '
  38
  39 test_expect_success 'verify graph with no graph file' '
  40         cd "$TRASH_DIRECTORY/full" &&
  41         git commit-graph verify
  42 '
  43
  44 test_expect_success 'write graph with no packs' '
  45         cd "$TRASH_DIRECTORY/full" &&
  46         git commit-graph write --object-dir $objdir &&
  47         test_path_is_missing $objdir/info/commit-graph
  48 '
  49
  50 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
  51         cd "$TRASH_DIRECTORY/full" &&
  52         echo doesnotexist >in &&
  53         test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
  54         test_i18ngrep "error adding pack" stderr
  55 '
  56
  57 test_expect_success 'create commits and repack' '
  58         cd "$TRASH_DIRECTORY/full" &&
  59         for i in $(test_seq 3)
  60         do
  61                 test_commit $i &&
  62                 git branch commits/$i || return 1
  63         done &&
  64         git repack
  65 '
  66
  67 . "$TEST_DIRECTORY"/lib-commit-graph.sh
  68
  69 graph_git_behavior 'no graph' full commits/3 commits/1
  70
  71 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
  72         cd "$TRASH_DIRECTORY/full" &&
  73         # invalid, non-hex OID
  74         echo HEAD >in &&
  75         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
  76         test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
  77         # non-existent OID
  78         echo $ZERO_OID >in &&
  79         test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
  80         test_i18ngrep "invalid object" stderr &&
  81         # valid commit and tree OID
  82         git rev-parse HEAD HEAD^{tree} >in &&
  83         git commit-graph write --stdin-commits <in &&
  84         graph_read_expect 3 generation_data
  85 '
  86
  87 test_expect_success 'write graph' '
  88         cd "$TRASH_DIRECTORY/full" &&
  89         git commit-graph write &&
  90         test_path_is_file $objdir/info/commit-graph &&
  91         graph_read_expect "3" generation_data
  92 '
  93
  94 test_expect_success POSIXPERM 'write graph has correct permissions' '
  95         test_path_is_file $objdir/info/commit-graph &&
  96         echo "-r--r--r--" >expect &&
  97         test_modebits $objdir/info/commit-graph >actual &&
  98         test_cmp expect actual
  99 '
 100
 101 graph_git_behavior 'graph exists' full commits/3 commits/1
 102
 103 test_expect_success 'Add more commits' '
 104         cd "$TRASH_DIRECTORY/full" &&
 105         git reset --hard commits/1 &&
 106         for i in $(test_seq 4 5)
 107         do
 108                 test_commit $i &&
 109                 git branch commits/$i || return 1
 110         done &&
 111         git reset --hard commits/2 &&
 112         for i in $(test_seq 6 7)
 113         do
 114                 test_commit $i &&
 115                 git branch commits/$i || return 1
 116         done &&
 117         git reset --hard commits/2 &&
 118         git merge commits/4 &&
 119         git branch merge/1 &&
 120         git reset --hard commits/4 &&
 121         git merge commits/6 &&
 122         git branch merge/2 &&
 123         git reset --hard commits/3 &&
 124         git merge commits/5 commits/7 &&
 125         git branch merge/3 &&
 126         git repack
 127 '
 128
 129 test_expect_success 'commit-graph write progress off for redirected stderr' '
 130         cd "$TRASH_DIRECTORY/full" &&
 131         git commit-graph write 2>err &&
 132         test_must_be_empty err
 133 '
 134
 135 test_expect_success 'commit-graph write force progress on for stderr' '
 136         cd "$TRASH_DIRECTORY/full" &&
 137         GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
 138         test_file_not_empty err
 139 '
 140
 141 test_expect_success 'commit-graph write with the --no-progress option' '
 142         cd "$TRASH_DIRECTORY/full" &&
 143         git commit-graph write --no-progress 2>err &&
 144         test_must_be_empty err
 145 '
 146
 147 test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
 148         cd "$TRASH_DIRECTORY/full" &&
 149         git rev-parse commits/5 >in &&
 150         git commit-graph write --stdin-commits <in 2>err &&
 151         test_must_be_empty err
 152 '
 153
 154 test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
 155         cd "$TRASH_DIRECTORY/full" &&
 156         git rev-parse commits/5 >in &&
 157         GIT_PROGRESS_DELAY=0 git commit-graph write --stdin-commits --progress <in 2>err &&
 158         test_i18ngrep "Collecting commits from input" err
 159 '
 160
 161 test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
 162         cd "$TRASH_DIRECTORY/full" &&
 163         git rev-parse commits/5 >in &&
 164         git commit-graph write --stdin-commits --no-progress <in 2>err &&
 165         test_must_be_empty err
 166 '
 167
 168 test_expect_success 'commit-graph verify progress off for redirected stderr' '
 169         cd "$TRASH_DIRECTORY/full" &&
 170         git commit-graph verify 2>err &&
 171         test_must_be_empty err
 172 '
 173
 174 test_expect_success 'commit-graph verify force progress on for stderr' '
 175         cd "$TRASH_DIRECTORY/full" &&
 176         GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
 177         test_file_not_empty err
 178 '
 179
 180 test_expect_success 'commit-graph verify with the --no-progress option' '
 181         cd "$TRASH_DIRECTORY/full" &&
 182         git commit-graph verify --no-progress 2>err &&
 183         test_must_be_empty err
 184 '
 185
 186 # Current graph structure:
 187 #
 188 #   __M3___
 189 #  /   |   \
 190 # 3 M1 5 M2 7
 191 # |/  \|/  \|
 192 # 2    4    6
 193 # |___/____/
 194 # 1
 195
 196 test_expect_success 'write graph with merges' '
 197         cd "$TRASH_DIRECTORY/full" &&
 198         git commit-graph write &&
 199         test_path_is_file $objdir/info/commit-graph &&
 200         graph_read_expect "10" "generation_data extra_edges"
 201 '
 202
 203 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 204 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 205 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 206
 207 test_expect_success 'Add one more commit' '
 208         cd "$TRASH_DIRECTORY/full" &&
 209         test_commit 8 &&
 210         git branch commits/8 &&
 211         ls $objdir/pack | grep idx >existing-idx &&
 212         git repack &&
 213         ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 214 '
 215
 216 # Current graph structure:
 217 #
 218 #      8
 219 #      |
 220 #   __M3___
 221 #  /   |   \
 222 # 3 M1 5 M2 7
 223 # |/  \|/  \|
 224 # 2    4    6
 225 # |___/____/
 226 # 1
 227
 228 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 229 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 230
 231 test_expect_success 'write graph with new commit' '
 232         cd "$TRASH_DIRECTORY/full" &&
 233         git commit-graph write &&
 234         test_path_is_file $objdir/info/commit-graph &&
 235         graph_read_expect "11" "generation_data extra_edges"
 236 '
 237
 238 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 239 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 240
 241 test_expect_success 'write graph with nothing new' '
 242         cd "$TRASH_DIRECTORY/full" &&
 243         git commit-graph write &&
 244         test_path_is_file $objdir/info/commit-graph &&
 245         graph_read_expect "11" "generation_data extra_edges"
 246 '
 247
 248 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 249 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 250
 251 test_expect_success 'build graph from latest pack with closure' '
 252         cd "$TRASH_DIRECTORY/full" &&
 253         cat new-idx | git commit-graph write --stdin-packs &&
 254         test_path_is_file $objdir/info/commit-graph &&
 255         graph_read_expect "9" "generation_data extra_edges"
 256 '
 257
 258 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 259 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 260
 261 test_expect_success 'build graph from commits with closure' '
 262         cd "$TRASH_DIRECTORY/full" &&
 263         git tag -a -m "merge" tag/merge merge/2 &&
 264         git rev-parse tag/merge >commits-in &&
 265         git rev-parse merge/1 >>commits-in &&
 266         cat commits-in | git commit-graph write --stdin-commits &&
 267         test_path_is_file $objdir/info/commit-graph &&
 268         graph_read_expect "6" "generation_data"
 269 '
 270
 271 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 272 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 273
 274 test_expect_success 'build graph from commits with append' '
 275         cd "$TRASH_DIRECTORY/full" &&
 276         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 277         test_path_is_file $objdir/info/commit-graph &&
 278         graph_read_expect "10" "generation_data extra_edges"
 279 '
 280
 281 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 282 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 283
 284 test_expect_success 'build graph using --reachable' '
 285         cd "$TRASH_DIRECTORY/full" &&
 286         git commit-graph write --reachable &&
 287         test_path_is_file $objdir/info/commit-graph &&
 288         graph_read_expect "11" "generation_data extra_edges"
 289 '
 290
 291 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 292 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 293
 294 test_expect_success 'setup bare repo' '
 295         cd "$TRASH_DIRECTORY" &&
 296         git clone --bare --no-local full bare &&
 297         cd bare &&
 298         git config core.commitGraph true &&
 299         baredir="./objects"
 300 '
 301
 302 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 303 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 304
 305 test_expect_success 'write graph in bare repo' '
 306         cd "$TRASH_DIRECTORY/bare" &&
 307         git commit-graph write &&
 308         test_path_is_file $baredir/info/commit-graph &&
 309         graph_read_expect "11" "generation_data extra_edges"
 310 '
 311
 312 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 313 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 314
 315 test_expect_success 'perform fast-forward merge in full repo' '
 316         cd "$TRASH_DIRECTORY/full" &&
 317         git checkout -b merge-5-to-8 commits/5 &&
 318         git merge commits/8 &&
 319         git show-ref -s merge-5-to-8 >output &&
 320         git show-ref -s commits/8 >expect &&
 321         test_cmp expect output
 322 '
 323
 324 test_expect_success 'check that gc computes commit-graph' '
 325         cd "$TRASH_DIRECTORY/full" &&
 326         git commit --allow-empty -m "blank" &&
 327         git commit-graph write --reachable &&
 328         cp $objdir/info/commit-graph commit-graph-before-gc &&
 329         git reset --hard HEAD~1 &&
 330         git config gc.writeCommitGraph true &&
 331         git gc &&
 332         cp $objdir/info/commit-graph commit-graph-after-gc &&
 333         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 334         git commit-graph write --reachable &&
 335         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 336 '
 337
 338 test_expect_success 'replace-objects invalidates commit-graph' '
 339         cd "$TRASH_DIRECTORY" &&
 340         test_when_finished rm -rf replace &&
 341         git clone full replace &&
 342         (
 343                 cd replace &&
 344                 git commit-graph write --reachable &&
 345                 test_path_is_file .git/objects/info/commit-graph &&
 346                 git replace HEAD~1 HEAD~2 &&
 347                 graph_git_two_modes "commit-graph verify" &&
 348                 git -c core.commitGraph=false log >expect &&
 349                 git -c core.commitGraph=true log >actual &&
 350                 test_cmp expect actual &&
 351                 git commit-graph write --reachable &&
 352                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 353                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 354                 test_cmp expect actual &&
 355                 rm -rf .git/objects/info/commit-graph &&
 356                 git commit-graph write --reachable &&
 357                 test_path_is_file .git/objects/info/commit-graph
 358         )
 359 '
 360
 361 test_expect_success 'commit grafts invalidate commit-graph' '
 362         cd "$TRASH_DIRECTORY" &&
 363         test_when_finished rm -rf graft &&
 364         git clone full graft &&
 365         (
 366                 cd graft &&
 367                 git commit-graph write --reachable &&
 368                 test_path_is_file .git/objects/info/commit-graph &&
 369                 H1=$(git rev-parse --verify HEAD~1) &&
 370                 H3=$(git rev-parse --verify HEAD~3) &&
 371                 echo "$H1 $H3" >.git/info/grafts &&
 372                 git -c core.commitGraph=false log >expect &&
 373                 git -c core.commitGraph=true log >actual &&
 374                 test_cmp expect actual &&
 375                 git commit-graph write --reachable &&
 376                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 377                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 378                 test_cmp expect actual &&
 379                 rm -rf .git/objects/info/commit-graph &&
 380                 git commit-graph write --reachable &&
 381                 test_path_is_missing .git/objects/info/commit-graph
 382         )
 383 '
 384
 385 test_expect_success 'replace-objects invalidates commit-graph' '
 386         cd "$TRASH_DIRECTORY" &&
 387         test_when_finished rm -rf shallow &&
 388         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 389         (
 390                 cd shallow &&
 391                 git commit-graph write --reachable &&
 392                 test_path_is_missing .git/objects/info/commit-graph &&
 393                 git fetch origin --unshallow &&
 394                 git commit-graph write --reachable &&
 395                 test_path_is_file .git/objects/info/commit-graph
 396         )
 397 '
 398
 399 test_expect_success 'warn on improper hash version' '
 400         git init --object-format=sha1 sha1 &&
 401         (
 402                 cd sha1 &&
 403                 test_commit 1 &&
 404                 git commit-graph write --reachable &&
 405                 mv .git/objects/info/commit-graph ../cg-sha1
 406         ) &&
 407         git init --object-format=sha256 sha256 &&
 408         (
 409                 cd sha256 &&
 410                 test_commit 1 &&
 411                 git commit-graph write --reachable &&
 412                 mv .git/objects/info/commit-graph ../cg-sha256
 413         ) &&
 414         (
 415                 cd sha1 &&
 416                 mv ../cg-sha256 .git/objects/info/commit-graph &&
 417                 git log -1 2>err &&
 418                 test_i18ngrep "commit-graph hash version 2 does not match version 1" err
 419         ) &&
 420         (
 421                 cd sha256 &&
 422                 mv ../cg-sha1 .git/objects/info/commit-graph &&
 423                 git log -1 2>err &&
 424                 test_i18ngrep "commit-graph hash version 1 does not match version 2" err
 425         )
 426 '
 427
 428 test_expect_success TIME_IS_64BIT,TIME_T_IS_64BIT 'lower layers have overflow chunk' '
 429         cd "$TRASH_DIRECTORY/full" &&
 430         UNIX_EPOCH_ZERO="@0 +0000" &&
 431         FUTURE_DATE="@4147483646 +0000" &&
 432         rm -f .git/objects/info/commit-graph &&
 433         test_commit --date "$FUTURE_DATE" future-1 &&
 434         test_commit --date "$UNIX_EPOCH_ZERO" old-1 &&
 435         git commit-graph write --reachable &&
 436         test_commit --date "$FUTURE_DATE" future-2 &&
 437         test_commit --date "$UNIX_EPOCH_ZERO" old-2 &&
 438         git commit-graph write --reachable --split=no-merge &&
 439         test_commit extra &&
 440         git commit-graph write --reachable --split=no-merge &&
 441         git commit-graph write --reachable &&
 442         graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
 443         mv .git/objects/info/commit-graph commit-graph-upgraded &&
 444         git commit-graph write --reachable &&
 445         graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
 446         test_cmp .git/objects/info/commit-graph commit-graph-upgraded
 447 '
 448
 449 # the verify tests below expect the commit-graph to contain
 450 # exactly the commits reachable from the commits/8 branch.
 451 # If the file changes the set of commits in the list, then the
 452 # offsets into the binary file will result in different edits
 453 # and the tests will likely break.
 454
 455 test_expect_success 'git commit-graph verify' '
 456         cd "$TRASH_DIRECTORY/full" &&
 457         git rev-parse commits/8 | git -c commitGraph.generationVersion=1 commit-graph write --stdin-commits &&
 458         git commit-graph verify >output &&
 459         graph_read_expect 9 extra_edges 1
 460 '
 461
 462 NUM_COMMITS=9
 463 NUM_OCTOPUS_EDGES=2
 464 HASH_LEN="$(test_oid rawsz)"
 465 GRAPH_BYTE_VERSION=4
 466 GRAPH_BYTE_HASH=5
 467 GRAPH_BYTE_CHUNK_COUNT=6
 468 GRAPH_CHUNK_LOOKUP_OFFSET=8
 469 GRAPH_CHUNK_LOOKUP_WIDTH=12
 470 GRAPH_CHUNK_LOOKUP_ROWS=5
 471 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 472 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 473                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 474 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 475                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 476 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 477                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 478 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 479 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 480 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 481 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 482 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 483 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 484 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 485 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 486 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 487 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 488 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 489 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 490 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 491 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 492                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 493 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 494 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 495
 496 corrupt_graph_setup() {
 497         cd "$TRASH_DIRECTORY/full" &&
 498         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 499         cp $objdir/info/commit-graph commit-graph-backup &&
 500         chmod u+w $objdir/info/commit-graph
 501 }
 502
 503 corrupt_graph_verify() {
 504         grepstr=$1
 505         test_must_fail git commit-graph verify 2>test_err &&
 506         grep -v "^+" test_err >err &&
 507         test_i18ngrep "$grepstr" err &&
 508         if test "$2" != "no-copy"
 509         then
 510                 cp $objdir/info/commit-graph commit-graph-pre-write-test
 511         fi &&
 512         git status --short &&
 513         GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git commit-graph write &&
 514         chmod u+w $objdir/info/commit-graph &&
 515         git commit-graph verify
 516 }
 517
 518 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 519 # Manipulates the commit-graph file at the position
 520 # by inserting the data, optionally zeroing the file
 521 # starting at <zero_pos>, then runs 'git commit-graph verify'
 522 # and places the output in the file 'err'. Test 'err' for
 523 # the given string.
 524 corrupt_graph_and_verify() {
 525         pos=$1
 526         data="${2:-\0}"
 527         grepstr=$3
 528         corrupt_graph_setup &&
 529         orig_size=$(wc -c < $objdir/info/commit-graph) &&
 530         zero_pos=${4:-${orig_size}} &&
 531         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 532         dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 533         test-tool genzeros $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
 534         corrupt_graph_verify "$grepstr"
 535
 536 }
 537
 538 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 539         corrupt_graph_setup &&
 540         chmod 000 $objdir/info/commit-graph &&
 541         corrupt_graph_verify "Could not open" "no-copy"
 542 '
 543
 544 test_expect_success 'detect too small' '
 545         corrupt_graph_setup &&
 546         echo "a small graph" >$objdir/info/commit-graph &&
 547         corrupt_graph_verify "too small"
 548 '
 549
 550 test_expect_success 'detect bad signature' '
 551         corrupt_graph_and_verify 0 "\0" \
 552                 "graph signature"
 553 '
 554
 555 test_expect_success 'detect bad version' '
 556         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 557                 "graph version"
 558 '
 559
 560 test_expect_success 'detect bad hash version' '
 561         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 562                 "hash version"
 563 '
 564
 565 test_expect_success 'detect low chunk count' '
 566         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \
 567                 "final chunk has non-zero id"
 568 '
 569
 570 test_expect_success 'detect missing OID fanout chunk' '
 571         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 572                 "missing the OID Fanout chunk"
 573 '
 574
 575 test_expect_success 'detect missing OID lookup chunk' '
 576         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 577                 "missing the OID Lookup chunk"
 578 '
 579
 580 test_expect_success 'detect missing commit data chunk' '
 581         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 582                 "missing the Commit Data chunk"
 583 '
 584
 585 test_expect_success 'detect incorrect fanout' '
 586         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 587                 "fanout value"
 588 '
 589
 590 test_expect_success 'detect incorrect fanout final value' '
 591         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 592                 "fanout value"
 593 '
 594
 595 test_expect_success 'detect incorrect OID order' '
 596         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 597                 "incorrect OID order"
 598 '
 599
 600 test_expect_success 'detect OID not in object database' '
 601         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 602                 "from object database"
 603 '
 604
 605 test_expect_success 'detect incorrect tree OID' '
 606         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 607                 "root tree OID for commit"
 608 '
 609
 610 test_expect_success 'detect incorrect parent int-id' '
 611         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 612                 "invalid parent"
 613 '
 614
 615 test_expect_success 'detect extra parent int-id' '
 616         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 617                 "is too long"
 618 '
 619
 620 test_expect_success 'detect wrong parent' '
 621         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 622                 "commit-graph parent for"
 623 '
 624
 625 test_expect_success 'detect incorrect generation number' '
 626         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 627                 "generation for commit"
 628 '
 629
 630 test_expect_success 'detect incorrect generation number' '
 631         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 632                 "non-zero generation number"
 633 '
 634
 635 test_expect_success 'detect incorrect commit date' '
 636         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 637                 "commit date"
 638 '
 639
 640 test_expect_success 'detect incorrect parent for octopus merge' '
 641         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 642                 "invalid parent"
 643 '
 644
 645 test_expect_success 'detect invalid checksum hash' '
 646         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 647                 "incorrect checksum"
 648 '
 649
 650 test_expect_success 'detect incorrect chunk count' '
 651         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 652                 "commit-graph file is too small to hold [0-9]* chunks" \
 653                 $GRAPH_CHUNK_LOOKUP_OFFSET
 654 '
 655
 656 test_expect_success 'git fsck (checks commit-graph when config set to true)' '
 657         cd "$TRASH_DIRECTORY/full" &&
 658         git fsck &&
 659         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 660                 "incorrect checksum" &&
 661         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 662         test_must_fail git -c core.commitGraph=true fsck
 663 '
 664
 665 test_expect_success 'git fsck (ignores commit-graph when config set to false)' '
 666         cd "$TRASH_DIRECTORY/full" &&
 667         git fsck &&
 668         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 669                 "incorrect checksum" &&
 670         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 671         git -c core.commitGraph=false fsck
 672 '
 673
 674 test_expect_success 'git fsck (checks commit-graph when config unset)' '
 675         cd "$TRASH_DIRECTORY/full" &&
 676         test_when_finished "git config core.commitGraph true" &&
 677
 678         git fsck &&
 679         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 680                 "incorrect checksum" &&
 681         test_unconfig core.commitGraph &&
 682         cp commit-graph-pre-write-test $objdir/info/commit-graph &&
 683         test_must_fail git fsck
 684 '
 685
 686 test_expect_success 'setup non-the_repository tests' '
 687         rm -rf repo &&
 688         git init repo &&
 689         test_commit -C repo one &&
 690         test_commit -C repo two &&
 691         git -C repo config core.commitGraph true &&
 692         git -C repo rev-parse two | \
 693                 git -C repo commit-graph write --stdin-commits
 694 '
 695
 696 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 697         test-tool repository parse_commit_in_graph \
 698                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 699         {
 700                 git -C repo log --pretty=format:"%ct " -1 &&
 701                 git -C repo rev-parse one
 702         } >expect &&
 703         test_cmp expect actual &&
 704
 705         test-tool repository parse_commit_in_graph \
 706                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 707         git -C repo log --pretty="%ct" -1 one >expect &&
 708         test_cmp expect actual
 709 '
 710
 711 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 712         test-tool repository get_commit_tree_in_graph \
 713                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 714         git -C repo rev-parse two^{tree} >expect &&
 715         test_cmp expect actual &&
 716
 717         test-tool repository get_commit_tree_in_graph \
 718                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 719         git -C repo rev-parse one^{tree} >expect &&
 720         test_cmp expect actual
 721 '
 722
 723 test_expect_success 'corrupt commit-graph write (broken parent)' '
 724         rm -rf repo &&
 725         git init repo &&
 726         (
 727                 cd repo &&
 728                 empty="$(git mktree </dev/null)" &&
 729                 cat >broken <<-EOF &&
 730                 tree $empty
 731                 parent $ZERO_OID
 732                 author whatever <whatever@example.com> 1234 -0000
 733                 committer whatever <whatever@example.com> 1234 -0000
 734
 735                 broken commit
 736                 EOF
 737                 broken="$(git hash-object -w -t commit --literally broken)" &&
 738                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
 739                 test_must_fail git commit-graph write --stdin-commits \
 740                         <good 2>test_err &&
 741                 test_i18ngrep "unable to parse commit" test_err
 742         )
 743 '
 744
 745 test_expect_success 'corrupt commit-graph write (missing tree)' '
 746         rm -rf repo &&
 747         git init repo &&
 748         (
 749                 cd repo &&
 750                 tree="$(git mktree </dev/null)" &&
 751                 cat >broken <<-EOF &&
 752                 parent $ZERO_OID
 753                 author whatever <whatever@example.com> 1234 -0000
 754                 committer whatever <whatever@example.com> 1234 -0000
 755
 756                 broken commit
 757                 EOF
 758                 broken="$(git hash-object -w -t commit --literally broken)" &&
 759                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 760                 test_must_fail git commit-graph write --stdin-commits \
 761                         <good 2>test_err &&
 762                 test_i18ngrep "unable to parse commit" test_err
 763         )
 764 '
 765
 766 # We test the overflow-related code with the following repo history:
 767 #
 768 #               4:F - 5:N - 6:U
 769 #              /                \
 770 # 1:U - 2:N - 3:U                M:N
 771 #              \                /
 772 #               7:N - 8:F - 9:N
 773 #
 774 # Here the commits denoted by U have committer date of zero seconds
 775 # since Unix epoch, the commits denoted by N have committer date
 776 # starting from 1112354055 seconds since Unix epoch (default committer
 777 # date for the test suite), and the commits denoted by F have committer
 778 # date of (2 ^ 31 - 2) seconds since Unix epoch.
 779 #
 780 # The largest offset observed is 2 ^ 31, just large enough to overflow.
 781 #
 782
 783 test_expect_success 'set up and verify repo with generation data overflow chunk' '
 784         objdir=".git/objects" &&
 785         UNIX_EPOCH_ZERO="@0 +0000" &&
 786         FUTURE_DATE="@2147483646 +0000" &&
 787         cd "$TRASH_DIRECTORY" &&
 788         mkdir repo &&
 789         cd repo &&
 790         git init &&
 791         test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
 792         test_commit 2 &&
 793         test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
 794         git commit-graph write --reachable &&
 795         graph_read_expect 3 generation_data &&
 796         test_commit --date "$FUTURE_DATE" 4 &&
 797         test_commit 5 &&
 798         test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
 799         git branch left &&
 800         git reset --hard 3 &&
 801         test_commit 7 &&
 802         test_commit --date "$FUTURE_DATE" 8 &&
 803         test_commit 9 &&
 804         git branch right &&
 805         git reset --hard 3 &&
 806         test_merge M left right &&
 807         git commit-graph write --reachable &&
 808         graph_read_expect 10 "generation_data generation_data_overflow" &&
 809         git commit-graph verify
 810 '
 811
 812 graph_git_behavior 'generation data overflow chunk repo' repo left right
 813
 814 test_done