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