t/t5318-commit-graph.sh

   1 #!/bin/sh
   2
   3 test_description='commit graph'
   4 . ./test-lib.sh
   5 . "$TEST_DIRECTORY"/lib-chunk.sh
   6
   7 GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=0
   8
   9 test_expect_success 'usage' '
  10         test_expect_code 129 git commit-graph write blah 2>err &&
  11         test_expect_code 129 git commit-graph write verify
  12 '
  13
  14 test_expect_success 'usage shown without sub-command' '
  15         test_expect_code 129 git commit-graph 2>err &&
  16         grep usage: err
  17 '
  18
  19 test_expect_success 'usage shown with an error on unknown sub-command' '
  20         cat >expect <<-\EOF &&
  21         error: unknown subcommand: `unknown'\''
  22         EOF
  23         test_expect_code 129 git commit-graph unknown 2>stderr &&
  24         grep error stderr >actual &&
  25         test_cmp expect actual
  26 '
  27
  28 objdir=".git/objects"
  29
  30 test_expect_success 'setup full repo' '
  31         git init full
  32 '
  33
  34 test_expect_success POSIXPERM 'tweak umask for modebit tests' '
  35         umask 022
  36 '
  37
  38 test_expect_success 'verify graph with no graph file' '
  39         git -C full commit-graph verify
  40 '
  41
  42 test_expect_success 'write graph with no packs' '
  43         git -C full commit-graph write --object-dir $objdir &&
  44         test_path_is_missing full/$objdir/info/commit-graph
  45 '
  46
  47 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
  48         echo doesnotexist >in &&
  49         test_expect_code 1 git -C full commit-graph write --stdin-packs \
  50                 <in 2>stderr &&
  51         test_grep "error adding pack" stderr
  52 '
  53
  54 test_expect_success 'create commits and repack' '
  55         for i in $(test_seq 3)
  56         do
  57                 test_commit -C full $i &&
  58                 git -C full branch commits/$i || return 1
  59         done &&
  60         git -C full repack
  61 '
  62
  63 . "$TEST_DIRECTORY"/lib-commit-graph.sh
  64
  65 graph_git_behavior 'no graph' full commits/3 commits/1
  66
  67 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
  68         # invalid, non-hex OID
  69         echo HEAD | test_expect_code 1 git -C full commit-graph write \
  70                 --stdin-commits 2>stderr &&
  71         test_grep "unexpected non-hex object ID: HEAD" stderr &&
  72         # non-existent OID
  73         echo $ZERO_OID | test_expect_code 1 git -C full commit-graph write \
  74                 --stdin-commits 2>stderr &&
  75         test_grep "invalid object" stderr &&
  76         # valid commit and tree OID
  77         git -C full rev-parse HEAD HEAD^{tree} >in &&
  78         git -C full commit-graph write --stdin-commits <in &&
  79         graph_read_expect -C full 3 generation_data
  80 '
  81
  82 test_expect_success 'write graph' '
  83         git -C full commit-graph write &&
  84         test_path_is_file full/$objdir/info/commit-graph &&
  85         graph_read_expect -C full 3 generation_data
  86 '
  87
  88 test_expect_success POSIXPERM 'write graph has correct permissions' '
  89         test_path_is_file full/$objdir/info/commit-graph &&
  90         echo "-r--r--r--" >expect &&
  91         test_modebits full/$objdir/info/commit-graph >actual &&
  92         test_cmp expect actual
  93 '
  94
  95 graph_git_behavior 'graph exists' full commits/3 commits/1
  96
  97 test_expect_success 'Add more commits' '
  98         git -C full reset --hard commits/1 &&
  99         for i in $(test_seq 4 5)
 100         do
 101                 test_commit -C full $i &&
 102                 git -C full branch commits/$i || return 1
 103         done &&
 104         git -C full reset --hard commits/2 &&
 105         for i in $(test_seq 6 7)
 106         do
 107                 test_commit -C full $i &&
 108                 git -C full branch commits/$i || return 1
 109         done &&
 110         git -C full reset --hard commits/2 &&
 111         git -C full merge commits/4 &&
 112         git -C full branch merge/1 &&
 113         git -C full reset --hard commits/4 &&
 114         git -C full merge commits/6 &&
 115         git -C full branch merge/2 &&
 116         git -C full reset --hard commits/3 &&
 117         git -C full merge commits/5 commits/7 &&
 118         git -C full branch merge/3 &&
 119         git -C full repack
 120 '
 121
 122 test_expect_success 'commit-graph write progress off for redirected stderr' '
 123         git -C full commit-graph write 2>err &&
 124         test_must_be_empty err
 125 '
 126
 127 test_expect_success 'commit-graph write force progress on for stderr' '
 128         GIT_PROGRESS_DELAY=0 git -C full commit-graph write --progress 2>err &&
 129         test_file_not_empty err
 130 '
 131
 132 test_expect_success 'commit-graph write with the --no-progress option' '
 133         git -C full commit-graph write --no-progress 2>err &&
 134         test_must_be_empty err
 135 '
 136
 137 test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
 138         git -C full rev-parse commits/5 >in &&
 139         git -C full commit-graph write --stdin-commits <in 2>err &&
 140         test_must_be_empty err
 141 '
 142
 143 test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
 144         git -C full rev-parse commits/5 >in &&
 145         GIT_PROGRESS_DELAY=0 git -C full commit-graph write --stdin-commits \
 146                 --progress <in 2>err &&
 147         test_grep "Collecting commits from input" err
 148 '
 149
 150 test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
 151         git -C full rev-parse commits/5 >in &&
 152         git -C full commit-graph write --stdin-commits --no-progress <in 2>err &&
 153         test_must_be_empty err
 154 '
 155
 156 test_expect_success 'commit-graph verify progress off for redirected stderr' '
 157         git -C full commit-graph verify 2>err &&
 158         test_must_be_empty err
 159 '
 160
 161 test_expect_success 'commit-graph verify force progress on for stderr' '
 162         GIT_PROGRESS_DELAY=0 git -C full commit-graph verify --progress 2>err &&
 163         test_file_not_empty err
 164 '
 165
 166 test_expect_success 'commit-graph verify with the --no-progress option' '
 167         git -C full commit-graph verify --no-progress 2>err &&
 168         test_must_be_empty err
 169 '
 170
 171 # Current graph structure:
 172 #
 173 #   __M3___
 174 #  /   |   \
 175 # 3 M1 5 M2 7
 176 # |/  \|/  \|
 177 # 2    4    6
 178 # |___/____/
 179 # 1
 180
 181 test_expect_success 'write graph with merges' '
 182         git -C full commit-graph write &&
 183         test_path_is_file full/$objdir/info/commit-graph &&
 184         graph_read_expect -C full 10 "generation_data extra_edges"
 185 '
 186
 187 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 188 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 189 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 190
 191 test_expect_success 'Add one more commit' '
 192         test_commit -C full 8 &&
 193         git -C full branch commits/8 &&
 194         ls full/$objdir/pack | grep idx >existing-idx &&
 195         git -C full repack &&
 196         ls full/$objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 197 '
 198
 199 # Current graph structure:
 200 #
 201 #      8
 202 #      |
 203 #   __M3___
 204 #  /   |   \
 205 # 3 M1 5 M2 7
 206 # |/  \|/  \|
 207 # 2    4    6
 208 # |___/____/
 209 # 1
 210
 211 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 212 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 213
 214 test_expect_success 'write graph with new commit' '
 215         git -C full commit-graph write &&
 216         test_path_is_file full/$objdir/info/commit-graph &&
 217         graph_read_expect -C full 11 "generation_data extra_edges"
 218 '
 219
 220 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 221 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 222
 223 test_expect_success 'write graph with nothing new' '
 224         git -C full commit-graph write &&
 225         test_path_is_file full/$objdir/info/commit-graph &&
 226         graph_read_expect -C full 11 "generation_data extra_edges"
 227 '
 228
 229 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 230 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 231
 232 test_expect_success 'build graph from latest pack with closure' '
 233         git -C full commit-graph write --stdin-packs <new-idx &&
 234         test_path_is_file full/$objdir/info/commit-graph &&
 235         graph_read_expect -C full 9 "generation_data extra_edges"
 236 '
 237
 238 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 239 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 240
 241 test_expect_success 'build graph from commits with closure' '
 242         git -C full tag -a -m "merge" tag/merge merge/2 &&
 243         git -C full rev-parse tag/merge >commits-in &&
 244         git -C full rev-parse merge/1 >>commits-in &&
 245         git -C full commit-graph write --stdin-commits <commits-in &&
 246         test_path_is_file full/$objdir/info/commit-graph &&
 247         graph_read_expect -C full 6 "generation_data"
 248 '
 249
 250 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 251 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 252
 253 test_expect_success 'build graph from commits with append' '
 254         git -C full rev-parse merge/3 >in &&
 255         git -C full commit-graph write --stdin-commits --append <in &&
 256         test_path_is_file full/$objdir/info/commit-graph &&
 257         graph_read_expect -C full 10 "generation_data extra_edges"
 258 '
 259
 260 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 261 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 262
 263 test_expect_success 'build graph using --reachable' '
 264         git -C full commit-graph write --reachable &&
 265         test_path_is_file full/$objdir/info/commit-graph &&
 266         graph_read_expect -C full 11 "generation_data extra_edges"
 267 '
 268
 269 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 270 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 271
 272 test_expect_success 'setup bare repo' '
 273         git clone --bare --no-local full bare
 274 '
 275
 276 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 277 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 278
 279 test_expect_success 'write graph in bare repo' '
 280         git -C bare commit-graph write &&
 281         test_path_is_file bare/objects/info/commit-graph &&
 282         graph_read_expect -C bare 11 "generation_data extra_edges"
 283 '
 284
 285 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 286 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 287
 288 test_expect_success 'perform fast-forward merge in full repo' '
 289         git -C full checkout -b merge-5-to-8 commits/5 &&
 290         git -C full merge commits/8 &&
 291         git -C full show-ref -s merge-5-to-8 >output &&
 292         git -C full show-ref -s commits/8 >expect &&
 293         test_cmp expect output
 294 '
 295
 296 test_expect_success 'check that gc computes commit-graph' '
 297         test_commit -C full --no-tag blank &&
 298         git -C full commit-graph write --reachable &&
 299         cp full/$objdir/info/commit-graph commit-graph-before-gc &&
 300         git -C full reset --hard HEAD~1 &&
 301         test_config -C full gc.writeCommitGraph true &&
 302         git -C full gc &&
 303         cp full/$objdir/info/commit-graph commit-graph-after-gc &&
 304         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 305         git -C full commit-graph write --reachable &&
 306         test_cmp_bin commit-graph-after-gc full/$objdir/info/commit-graph
 307 '
 308
 309 test_expect_success 'replace-objects invalidates commit-graph' '
 310         test_when_finished rm -rf replace &&
 311         git clone full replace &&
 312         (
 313                 cd replace &&
 314                 git commit-graph write --reachable &&
 315                 test_path_is_file .git/objects/info/commit-graph &&
 316                 git replace HEAD~1 HEAD~2 &&
 317                 graph_git_two_modes "commit-graph verify" &&
 318                 git -c core.commitGraph=false log >expect &&
 319                 git -c core.commitGraph=true log >actual &&
 320                 test_cmp expect actual &&
 321                 git commit-graph write --reachable &&
 322                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 323                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 324                 test_cmp expect actual &&
 325                 rm -rf .git/objects/info/commit-graph &&
 326                 git commit-graph write --reachable &&
 327                 test_path_is_file .git/objects/info/commit-graph
 328         )
 329 '
 330
 331 test_expect_success 'commit grafts invalidate commit-graph' '
 332         test_when_finished rm -rf graft &&
 333         git clone --template= full graft &&
 334         (
 335                 cd graft &&
 336                 git commit-graph write --reachable &&
 337                 test_path_is_file .git/objects/info/commit-graph &&
 338                 H1=$(git rev-parse --verify HEAD~1) &&
 339                 H3=$(git rev-parse --verify HEAD~3) &&
 340                 mkdir .git/info &&
 341                 echo "$H1 $H3" >.git/info/grafts &&
 342                 git -c core.commitGraph=false log >expect &&
 343                 git -c core.commitGraph=true log >actual &&
 344                 test_cmp expect actual &&
 345                 git commit-graph write --reachable &&
 346                 git -c core.commitGraph=false --no-replace-objects log >expect &&
 347                 git -c core.commitGraph=true --no-replace-objects log >actual &&
 348                 test_cmp expect actual &&
 349                 rm -rf .git/objects/info/commit-graph &&
 350                 git commit-graph write --reachable &&
 351                 test_path_is_missing .git/objects/info/commit-graph
 352         )
 353 '
 354
 355 test_expect_success 'replace-objects invalidates commit-graph' '
 356         test_when_finished rm -rf shallow &&
 357         git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 358         (
 359                 cd shallow &&
 360                 git commit-graph write --reachable &&
 361                 test_path_is_missing .git/objects/info/commit-graph &&
 362                 git fetch origin --unshallow &&
 363                 git commit-graph write --reachable &&
 364                 test_path_is_file .git/objects/info/commit-graph
 365         )
 366 '
 367
 368 test_expect_success 'warn on improper hash version' '
 369         git init --object-format=sha1 sha1 &&
 370         (
 371                 cd sha1 &&
 372                 test_commit 1 &&
 373                 git commit-graph write --reachable &&
 374                 mv .git/objects/info/commit-graph ../cg-sha1
 375         ) &&
 376         git init --object-format=sha256 sha256 &&
 377         (
 378                 cd sha256 &&
 379                 test_commit 1 &&
 380                 git commit-graph write --reachable &&
 381                 mv .git/objects/info/commit-graph ../cg-sha256
 382         ) &&
 383         (
 384                 cd sha1 &&
 385                 mv ../cg-sha256 .git/objects/info/commit-graph &&
 386                 git log -1 2>err &&
 387                 test_grep "commit-graph hash version 2 does not match version 1" err
 388         ) &&
 389         (
 390                 cd sha256 &&
 391                 mv ../cg-sha1 .git/objects/info/commit-graph &&
 392                 git log -1 2>err &&
 393                 test_grep "commit-graph hash version 1 does not match version 2" err
 394         )
 395 '
 396
 397 test_expect_success TIME_IS_64BIT,TIME_T_IS_64BIT 'lower layers have overflow chunk' '
 398         UNIX_EPOCH_ZERO="@0 +0000" &&
 399         FUTURE_DATE="@4147483646 +0000" &&
 400         rm -f full/.git/objects/info/commit-graph &&
 401         test_commit -C full --date "$FUTURE_DATE" future-1 &&
 402         test_commit -C full --date "$UNIX_EPOCH_ZERO" old-1 &&
 403         git -C full commit-graph write --reachable &&
 404         test_commit -C full --date "$FUTURE_DATE" future-2 &&
 405         test_commit -C full --date "$UNIX_EPOCH_ZERO" old-2 &&
 406         git -C full commit-graph write --reachable --split=no-merge &&
 407         test_commit -C full extra &&
 408         git -C full commit-graph write --reachable --split=no-merge &&
 409         git -C full commit-graph write --reachable &&
 410         graph_read_expect -C full 16 \
 411                 "generation_data generation_data_overflow extra_edges" &&
 412         mv full/.git/objects/info/commit-graph commit-graph-upgraded &&
 413         git -C full commit-graph write --reachable &&
 414         graph_read_expect -C full 16 \
 415                 "generation_data generation_data_overflow extra_edges" &&
 416         test_cmp full/.git/objects/info/commit-graph commit-graph-upgraded
 417 '
 418
 419 # the verify tests below expect the commit-graph to contain
 420 # exactly the commits reachable from the commits/8 branch.
 421 # If the file changes the set of commits in the list, then the
 422 # offsets into the binary file will result in different edits
 423 # and the tests will likely break.
 424
 425 test_expect_success 'git commit-graph verify' '
 426         git -C full rev-parse commits/8 >in &&
 427         git -C full -c commitGraph.generationVersion=1 commit-graph write \
 428                 --stdin-commits <in &&
 429         git -C full commit-graph verify >output &&
 430         graph_read_expect -C full 9 extra_edges 1
 431 '
 432
 433 NUM_COMMITS=9
 434 NUM_OCTOPUS_EDGES=2
 435 HASH_LEN="$(test_oid rawsz)"
 436 GRAPH_BYTE_VERSION=4
 437 GRAPH_BYTE_HASH=5
 438 GRAPH_BYTE_CHUNK_COUNT=6
 439 GRAPH_CHUNK_LOOKUP_OFFSET=8
 440 GRAPH_CHUNK_LOOKUP_WIDTH=12
 441 GRAPH_CHUNK_LOOKUP_ROWS=5
 442 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 443 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 444                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 445 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 446                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 447 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 448                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 449 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 450 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 451 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 452 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 453 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 454 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 455 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 456 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 457 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 458 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 459 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 460 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 461 GRAPH_BYTE_COMMIT_GENERATION_LAST=$(($GRAPH_BYTE_COMMIT_GENERATION + $(($NUM_COMMITS - 1)) * $GRAPH_COMMIT_DATA_WIDTH))
 462 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 463 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 464                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 465 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 466 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 467
 468 corrupt_graph_setup() {
 469         test_when_finished mv commit-graph-backup full/$objdir/info/commit-graph &&
 470         cp full/$objdir/info/commit-graph commit-graph-backup &&
 471         chmod u+w full/$objdir/info/commit-graph
 472 }
 473
 474 corrupt_graph_verify() {
 475         grepstr=$1
 476         test_must_fail git -C full commit-graph verify 2>test_err &&
 477         grep -v "^+" test_err >err &&
 478         test_grep "$grepstr" err &&
 479         if test "$2" != "no-copy"
 480         then
 481                 cp full/$objdir/info/commit-graph commit-graph-pre-write-test
 482         fi &&
 483         git -C full status --short &&
 484         GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git -C full commit-graph write &&
 485         chmod u+w full/$objdir/info/commit-graph &&
 486         git -C full commit-graph verify
 487 }
 488
 489 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
 490 # Manipulates the commit-graph file at the position
 491 # by inserting the data, optionally zeroing the file
 492 # starting at <zero_pos>, then runs 'git commit-graph verify'
 493 # and places the output in the file 'err'. Test 'err' for
 494 # the given string.
 495 corrupt_graph_and_verify() {
 496         pos=$1
 497         data="${2:-\0}"
 498         grepstr=$3
 499         corrupt_graph_setup &&
 500         orig_size=$(wc -c <full/$objdir/info/commit-graph) &&
 501         zero_pos=${4:-${orig_size}} &&
 502         printf "$data" | dd of="full/$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 503         dd of="full/$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
 504         test-tool genzeros $(($orig_size - $zero_pos)) >>"full/$objdir/info/commit-graph" &&
 505         corrupt_graph_verify "$grepstr"
 506
 507 }
 508
 509 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 510         corrupt_graph_setup &&
 511         chmod 000 full/$objdir/info/commit-graph &&
 512         corrupt_graph_verify "Could not open" "no-copy"
 513 '
 514
 515 test_expect_success 'detect too small' '
 516         corrupt_graph_setup &&
 517         echo "a small graph" >full/$objdir/info/commit-graph &&
 518         corrupt_graph_verify "too small"
 519 '
 520
 521 test_expect_success 'detect bad signature' '
 522         corrupt_graph_and_verify 0 "\0" \
 523                 "graph signature"
 524 '
 525
 526 test_expect_success 'detect bad version' '
 527         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 528                 "graph version"
 529 '
 530
 531 test_expect_success 'detect bad hash version' '
 532         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 533                 "hash version"
 534 '
 535
 536 test_expect_success 'detect low chunk count' '
 537         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\01" \
 538                 "final chunk has non-zero id"
 539 '
 540
 541 test_expect_success 'detect missing OID fanout chunk' '
 542         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 543                 "commit-graph required OID fanout chunk missing or corrupted"
 544 '
 545
 546 test_expect_success 'detect missing OID lookup chunk' '
 547         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 548                 "commit-graph required OID lookup chunk missing or corrupted"
 549 '
 550
 551 test_expect_success 'detect missing commit data chunk' '
 552         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 553                 "commit-graph required commit data chunk missing or corrupted"
 554 '
 555
 556 test_expect_success 'detect incorrect fanout' '
 557         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 558                 "fanout value"
 559 '
 560
 561 test_expect_success 'detect incorrect fanout final value' '
 562         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 563                 "OID lookup chunk is the wrong size"
 564 '
 565
 566 test_expect_success 'detect incorrect OID order' '
 567         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 568                 "incorrect OID order"
 569 '
 570
 571 test_expect_success 'detect OID not in object database' '
 572         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 573                 "from object database"
 574 '
 575
 576 test_expect_success 'detect incorrect tree OID' '
 577         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 578                 "root tree OID for commit"
 579 '
 580
 581 test_expect_success 'detect incorrect parent int-id' '
 582         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 583                 "invalid parent"
 584 '
 585
 586 test_expect_success 'detect extra parent int-id' '
 587         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 588                 "is too long"
 589 '
 590
 591 test_expect_success 'detect wrong parent' '
 592         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 593                 "commit-graph parent for"
 594 '
 595
 596 test_expect_success 'detect incorrect generation number' '
 597         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 598                 "generation for commit"
 599 '
 600
 601 test_expect_success 'detect incorrect commit date' '
 602         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 603                 "commit date"
 604 '
 605
 606 test_expect_success 'detect incorrect parent for octopus merge' '
 607         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 608                 "invalid parent"
 609 '
 610
 611 test_expect_success 'detect invalid checksum hash' '
 612         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 613                 "incorrect checksum"
 614 '
 615
 616 test_expect_success 'detect incorrect chunk count' '
 617         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\377" \
 618                 "commit-graph file is too small to hold [0-9]* chunks" \
 619                 $GRAPH_CHUNK_LOOKUP_OFFSET
 620 '
 621
 622 test_expect_success 'detect mixed generation numbers (non-zero to zero)' '
 623         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION_LAST "\0\0\0\0" \
 624                 "both zero and non-zero generations"
 625 '
 626
 627 test_expect_success 'detect mixed generation numbers (zero to non-zero)' '
 628         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\0\0\0\0" \
 629                 "both zero and non-zero generations"
 630 '
 631
 632 test_expect_success 'git fsck (checks commit-graph when config set to true)' '
 633         git -C full fsck &&
 634         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 635                 "incorrect checksum" &&
 636         cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
 637         test_must_fail git -C full -c core.commitGraph=true fsck
 638 '
 639
 640 test_expect_success 'git fsck (ignores commit-graph when config set to false)' '
 641         git -C full fsck &&
 642         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 643                 "incorrect checksum" &&
 644         cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
 645         git -C full -c core.commitGraph=false fsck
 646 '
 647
 648 test_expect_success 'git fsck (checks commit-graph when config unset)' '
 649         test_when_finished "git -C full config core.commitGraph true" &&
 650
 651         git -C full fsck &&
 652         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 653                 "incorrect checksum" &&
 654         test_unconfig -C full core.commitGraph &&
 655         cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
 656         test_must_fail git -C full fsck
 657 '
 658
 659 test_expect_success 'git fsck shows commit-graph output with --progress' '
 660         git -C "$TRASH_DIRECTORY/full" fsck --progress 2>err &&
 661         grep "Verifying commits in commit graph" err
 662 '
 663
 664 test_expect_success 'git fsck suppresses commit-graph output with --no-progress' '
 665         git -C "$TRASH_DIRECTORY/full" fsck --no-progress 2>err &&
 666         ! grep "Verifying commits in commit graph" err
 667 '
 668
 669 test_expect_success 'setup non-the_repository tests' '
 670         rm -rf repo &&
 671         git init repo &&
 672         test_commit -C repo one &&
 673         test_commit -C repo two &&
 674         git -C repo config core.commitGraph true &&
 675         git -C repo rev-parse two | \
 676                 git -C repo commit-graph write --stdin-commits
 677 '
 678
 679 test_expect_success 'parse_commit_in_graph works for non-the_repository' '
 680         test-tool repository parse_commit_in_graph \
 681                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 682         {
 683                 git -C repo log --pretty=format:"%ct " -1 &&
 684                 git -C repo rev-parse one
 685         } >expect &&
 686         test_cmp expect actual &&
 687
 688         test-tool repository parse_commit_in_graph \
 689                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 690         git -C repo log --pretty="%ct" -1 one >expect &&
 691         test_cmp expect actual
 692 '
 693
 694 test_expect_success 'get_commit_tree_in_graph works for non-the_repository' '
 695         test-tool repository get_commit_tree_in_graph \
 696                 repo/.git repo "$(git -C repo rev-parse two)" >actual &&
 697         git -C repo rev-parse two^{tree} >expect &&
 698         test_cmp expect actual &&
 699
 700         test-tool repository get_commit_tree_in_graph \
 701                 repo/.git repo "$(git -C repo rev-parse one)" >actual &&
 702         git -C repo rev-parse one^{tree} >expect &&
 703         test_cmp expect actual
 704 '
 705
 706 test_expect_success 'corrupt commit-graph write (broken parent)' '
 707         rm -rf repo &&
 708         git init repo &&
 709         (
 710                 cd repo &&
 711                 empty="$(git mktree </dev/null)" &&
 712                 cat >broken <<-EOF &&
 713                 tree $empty
 714                 parent $ZERO_OID
 715                 author whatever <whatever@example.com> 1234 -0000
 716                 committer whatever <whatever@example.com> 1234 -0000
 717
 718                 broken commit
 719                 EOF
 720                 broken="$(git hash-object -w -t commit --literally broken)" &&
 721                 git commit-tree -p "$broken" -m "good commit" "$empty" >good &&
 722                 test_must_fail git commit-graph write --stdin-commits \
 723                         <good 2>test_err &&
 724                 test_grep "unable to parse commit" test_err
 725         )
 726 '
 727
 728 test_expect_success 'corrupt commit-graph write (missing tree)' '
 729         rm -rf repo &&
 730         git init repo &&
 731         (
 732                 cd repo &&
 733                 tree="$(git mktree </dev/null)" &&
 734                 cat >broken <<-EOF &&
 735                 parent $ZERO_OID
 736                 author whatever <whatever@example.com> 1234 -0000
 737                 committer whatever <whatever@example.com> 1234 -0000
 738
 739                 broken commit
 740                 EOF
 741                 broken="$(git hash-object -w -t commit --literally broken)" &&
 742                 git commit-tree -p "$broken" -m "good" "$tree" >good &&
 743                 test_must_fail git commit-graph write --stdin-commits \
 744                         <good 2>test_err &&
 745                 test_grep "unable to parse commit" test_err
 746         )
 747 '
 748
 749 # We test the overflow-related code with the following repo history:
 750 #
 751 #               4:F - 5:N - 6:U
 752 #              /                \
 753 # 1:U - 2:N - 3:U                M:N
 754 #              \                /
 755 #               7:N - 8:F - 9:N
 756 #
 757 # Here the commits denoted by U have committer date of zero seconds
 758 # since Unix epoch, the commits denoted by N have committer date
 759 # starting from 1112354055 seconds since Unix epoch (default committer
 760 # date for the test suite), and the commits denoted by F have committer
 761 # date of (2 ^ 31 - 2) seconds since Unix epoch.
 762 #
 763 # The largest offset observed is 2 ^ 31, just large enough to overflow.
 764 #
 765
 766 test_expect_success 'set up and verify repo with generation data overflow chunk' '
 767         UNIX_EPOCH_ZERO="@0 +0000" &&
 768         FUTURE_DATE="@2147483646 +0000" &&
 769
 770         git init repo &&
 771         (
 772                 cd repo &&
 773
 774                 test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
 775                 test_commit 2 &&
 776                 test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
 777                 git commit-graph write --reachable &&
 778                 graph_read_expect 3 generation_data &&
 779                 test_commit --date "$FUTURE_DATE" 4 &&
 780                 test_commit 5 &&
 781                 test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
 782                 git branch left &&
 783                 git reset --hard 3 &&
 784                 test_commit 7 &&
 785                 test_commit --date "$FUTURE_DATE" 8 &&
 786                 test_commit 9 &&
 787                 git branch right &&
 788                 git reset --hard 3 &&
 789                 test_merge M left right &&
 790                 git commit-graph write --reachable &&
 791                 graph_read_expect 10 "generation_data generation_data_overflow" &&
 792                 git commit-graph verify
 793         )
 794 '
 795
 796 graph_git_behavior 'generation data overflow chunk repo' repo left right
 797
 798 test_expect_success 'overflow during generation version upgrade' '
 799         git init overflow-v2-upgrade &&
 800         (
 801                 cd overflow-v2-upgrade &&
 802
 803                 # This commit will have a date at two seconds past the Epoch,
 804                 # and a (v1) generation number of 1, since it is a root commit.
 805                 #
 806                 # The offset will then be computed as 1-2, which will underflow
 807                 # to 2^31, which is greater than the v2 offset small limit of
 808                 # 2^31-1.
 809                 #
 810                 # This is sufficient to need a large offset table for the v2
 811                 # generation numbers.
 812                 test_commit --date "@2 +0000" base &&
 813                 git repack -d &&
 814
 815                 # Test that upgrading from generation v1 to v2 correctly
 816                 # produces the overflow table.
 817                 git -c commitGraph.generationVersion=1 commit-graph write &&
 818                 git -c commitGraph.generationVersion=2 commit-graph write \
 819                         --changed-paths &&
 820
 821                 git rev-list --all
 822         )
 823 '
 824
 825 corrupt_chunk () {
 826         graph=full/.git/objects/info/commit-graph &&
 827         test_when_finished "rm -rf $graph" &&
 828         git -C full commit-graph write --reachable &&
 829         corrupt_chunk_file $graph "$@"
 830 }
 831
 832 check_corrupt_chunk () {
 833         corrupt_chunk "$@" &&
 834         git -C full -c core.commitGraph=false log >expect.out &&
 835         git -C full -c core.commitGraph=true log >out 2>err &&
 836         test_cmp expect.out out
 837 }
 838
 839 test_expect_success 'reader notices too-small oid fanout chunk' '
 840         # make it big enough that the graph file is plausible,
 841         # otherwise we hit an earlier check
 842         check_corrupt_chunk OIDF clear $(printf "000000%02x" $(test_seq 250)) &&
 843         cat >expect.err <<-\EOF &&
 844         error: commit-graph oid fanout chunk is wrong size
 845         error: commit-graph required OID fanout chunk missing or corrupted
 846         EOF
 847         test_cmp expect.err err
 848 '
 849
 850 test_expect_success 'reader notices fanout/lookup table mismatch' '
 851         check_corrupt_chunk OIDF 1020 "FFFFFFFF" &&
 852         cat >expect.err <<-\EOF &&
 853         error: commit-graph OID lookup chunk is the wrong size
 854         error: commit-graph required OID lookup chunk missing or corrupted
 855         EOF
 856         test_cmp expect.err err
 857 '
 858
 859 test_expect_success 'reader notices out-of-bounds fanout' '
 860         # Rather than try to corrupt a specific hash, we will just
 861         # wreck them all. But we cannot just set them all to 0xFFFFFFFF or
 862         # similar, as they are used for hi/lo starts in a binary search (so if
 863         # they are identical, that indicates that the search should abort
 864         # immediately). Instead, we will give them high values that differ by
 865         # 2^24, ensuring that any that are used would cause an out-of-bounds
 866         # read.
 867         check_corrupt_chunk OIDF 0 $(printf "%02x000000" $(test_seq 0 254)) &&
 868         cat >expect.err <<-\EOF &&
 869         error: commit-graph fanout values out of order
 870         error: commit-graph required OID fanout chunk missing or corrupted
 871         EOF
 872         test_cmp expect.err err
 873 '
 874
 875 test_expect_success 'reader notices too-small commit data chunk' '
 876         check_corrupt_chunk CDAT clear 00000000 &&
 877         cat >expect.err <<-\EOF &&
 878         error: commit-graph commit data chunk is wrong size
 879         error: commit-graph required commit data chunk missing or corrupted
 880         EOF
 881         test_cmp expect.err err
 882 '
 883
 884 test_expect_success 'reader notices out-of-bounds extra edge' '
 885         check_corrupt_chunk EDGE clear &&
 886         cat >expect.err <<-\EOF &&
 887         error: commit-graph extra-edges pointer out of bounds
 888         EOF
 889         test_cmp expect.err err
 890 '
 891
 892 test_expect_success 'reader notices too-small generations chunk' '
 893         check_corrupt_chunk GDA2 clear 00000000 &&
 894         cat >expect.err <<-\EOF &&
 895         error: commit-graph generations chunk is wrong size
 896         EOF
 897         test_cmp expect.err err
 898 '
 899
 900 test_expect_success 'stale commit cannot be parsed when given directly' '
 901         test_when_finished "rm -rf repo" &&
 902         git init repo &&
 903         (
 904                 cd repo &&
 905                 test_commit A &&
 906                 test_commit B &&
 907                 git commit-graph write --reachable &&
 908
 909                 oid=$(git rev-parse B) &&
 910                 rm .git/objects/"$(test_oid_to_path "$oid")" &&
 911
 912                 # Verify that it is possible to read the commit from the
 913                 # commit graph when not being paranoid, ...
 914                 git rev-list B &&
 915                 # ... but parsing the commit when double checking that
 916                 # it actually exists in the object database should fail.
 917                 test_must_fail env GIT_COMMIT_GRAPH_PARANOIA=true git rev-list -1 B
 918         )
 919 '
 920
 921 test_expect_success 'stale commit cannot be parsed when traversing graph' '
 922         test_when_finished "rm -rf repo" &&
 923         git init repo &&
 924         (
 925                 cd repo &&
 926
 927                 test_commit A &&
 928                 test_commit B &&
 929                 test_commit C &&
 930                 git commit-graph write --reachable &&
 931
 932                 # Corrupt the repository by deleting the intermediate commit
 933                 # object. Commands should notice that this object is absent and
 934                 # thus that the repository is corrupt even if the commit graph
 935                 # exists.
 936                 oid=$(git rev-parse B) &&
 937                 rm .git/objects/"$(test_oid_to_path "$oid")" &&
 938
 939                 # Again, we should be able to parse the commit when not
 940                 # being paranoid about commit graph staleness...
 941                 git rev-parse HEAD~2 &&
 942                 # ... but fail when we are paranoid.
 943                 test_must_fail env GIT_COMMIT_GRAPH_PARANOIA=true git rev-parse HEAD~2 2>error &&
 944                 grep "error: commit $oid exists in commit-graph but not in the object database" error
 945         )
 946 '
 947
 948 test_done