t/t5318-commit-graph.sh

   1 #!/bin/sh
   2
   3 test_description='commit graph'
   4 . ./test-lib.sh
   5
   6 test_expect_success 'setup full repo' '
   7         mkdir full &&
   8         cd "$TRASH_DIRECTORY/full" &&
   9         git init &&
  10         git config core.commitGraph true &&
  11         objdir=".git/objects"
  12 '
  13
  14 test_expect_success 'verify graph with no graph file' '
  15         cd "$TRASH_DIRECTORY/full" &&
  16         git commit-graph verify
  17 '
  18
  19 test_expect_success 'write graph with no packs' '
  20         cd "$TRASH_DIRECTORY/full" &&
  21         git commit-graph write --object-dir . &&
  22         test_path_is_file info/commit-graph
  23 '
  24
  25 test_expect_success 'create commits and repack' '
  26         cd "$TRASH_DIRECTORY/full" &&
  27         for i in $(test_seq 3)
  28         do
  29                 test_commit $i &&
  30                 git branch commits/$i
  31         done &&
  32         git repack
  33 '
  34
  35 graph_git_two_modes() {
  36         git -c core.commitGraph=true $1 >output
  37         git -c core.commitGraph=false $1 >expect
  38         test_cmp output expect
  39 }
  40
  41 graph_git_behavior() {
  42         MSG=$1
  43         DIR=$2
  44         BRANCH=$3
  45         COMPARE=$4
  46         test_expect_success "check normal git operations: $MSG" '
  47                 cd "$TRASH_DIRECTORY/$DIR" &&
  48                 graph_git_two_modes "log --oneline $BRANCH" &&
  49                 graph_git_two_modes "log --topo-order $BRANCH" &&
  50                 graph_git_two_modes "log --graph $COMPARE..$BRANCH" &&
  51                 graph_git_two_modes "branch -vv" &&
  52                 graph_git_two_modes "merge-base -a $BRANCH $COMPARE"
  53         '
  54 }
  55
  56 graph_git_behavior 'no graph' full commits/3 commits/1
  57
  58 graph_read_expect() {
  59         OPTIONAL=""
  60         NUM_CHUNKS=3
  61         if test ! -z $2
  62         then
  63                 OPTIONAL=" $2"
  64                 NUM_CHUNKS=$((3 + $(echo "$2" | wc -w)))
  65         fi
  66         cat >expect <<- EOF
  67         header: 43475048 1 1 $NUM_CHUNKS 0
  68         num_commits: $1
  69         chunks: oid_fanout oid_lookup commit_metadata$OPTIONAL
  70         EOF
  71         git commit-graph read >output &&
  72         test_cmp expect output
  73 }
  74
  75 test_expect_success 'write graph' '
  76         cd "$TRASH_DIRECTORY/full" &&
  77         graph1=$(git commit-graph write) &&
  78         test_path_is_file $objdir/info/commit-graph &&
  79         graph_read_expect "3"
  80 '
  81
  82 graph_git_behavior 'graph exists' full commits/3 commits/1
  83
  84 test_expect_success 'Add more commits' '
  85         cd "$TRASH_DIRECTORY/full" &&
  86         git reset --hard commits/1 &&
  87         for i in $(test_seq 4 5)
  88         do
  89                 test_commit $i &&
  90                 git branch commits/$i
  91         done &&
  92         git reset --hard commits/2 &&
  93         for i in $(test_seq 6 7)
  94         do
  95                 test_commit $i &&
  96                 git branch commits/$i
  97         done &&
  98         git reset --hard commits/2 &&
  99         git merge commits/4 &&
 100         git branch merge/1 &&
 101         git reset --hard commits/4 &&
 102         git merge commits/6 &&
 103         git branch merge/2 &&
 104         git reset --hard commits/3 &&
 105         git merge commits/5 commits/7 &&
 106         git branch merge/3 &&
 107         git repack
 108 '
 109
 110 # Current graph structure:
 111 #
 112 #   __M3___
 113 #  /   |   \
 114 # 3 M1 5 M2 7
 115 # |/  \|/  \|
 116 # 2    4    6
 117 # |___/____/
 118 # 1
 119
 120 test_expect_success 'write graph with merges' '
 121         cd "$TRASH_DIRECTORY/full" &&
 122         git commit-graph write &&
 123         test_path_is_file $objdir/info/commit-graph &&
 124         graph_read_expect "10" "large_edges"
 125 '
 126
 127 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
 128 graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 129 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 130
 131 test_expect_success 'Add one more commit' '
 132         cd "$TRASH_DIRECTORY/full" &&
 133         test_commit 8 &&
 134         git branch commits/8 &&
 135         ls $objdir/pack | grep idx >existing-idx &&
 136         git repack &&
 137         ls $objdir/pack| grep idx | grep -v --file=existing-idx >new-idx
 138 '
 139
 140 # Current graph structure:
 141 #
 142 #      8
 143 #      |
 144 #   __M3___
 145 #  /   |   \
 146 # 3 M1 5 M2 7
 147 # |/  \|/  \|
 148 # 2    4    6
 149 # |___/____/
 150 # 1
 151
 152 graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 153 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 154
 155 test_expect_success 'write graph with new commit' '
 156         cd "$TRASH_DIRECTORY/full" &&
 157         git commit-graph write &&
 158         test_path_is_file $objdir/info/commit-graph &&
 159         graph_read_expect "11" "large_edges"
 160 '
 161
 162 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 163 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 164
 165 test_expect_success 'write graph with nothing new' '
 166         cd "$TRASH_DIRECTORY/full" &&
 167         git commit-graph write &&
 168         test_path_is_file $objdir/info/commit-graph &&
 169         graph_read_expect "11" "large_edges"
 170 '
 171
 172 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 173 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 174
 175 test_expect_success 'build graph from latest pack with closure' '
 176         cd "$TRASH_DIRECTORY/full" &&
 177         cat new-idx | git commit-graph write --stdin-packs &&
 178         test_path_is_file $objdir/info/commit-graph &&
 179         graph_read_expect "9" "large_edges"
 180 '
 181
 182 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 183 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 184
 185 test_expect_success 'build graph from commits with closure' '
 186         cd "$TRASH_DIRECTORY/full" &&
 187         git tag -a -m "merge" tag/merge merge/2 &&
 188         git rev-parse tag/merge >commits-in &&
 189         git rev-parse merge/1 >>commits-in &&
 190         cat commits-in | git commit-graph write --stdin-commits &&
 191         test_path_is_file $objdir/info/commit-graph &&
 192         graph_read_expect "6"
 193 '
 194
 195 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 196 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 197
 198 test_expect_success 'build graph from commits with append' '
 199         cd "$TRASH_DIRECTORY/full" &&
 200         git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
 201         test_path_is_file $objdir/info/commit-graph &&
 202         graph_read_expect "10" "large_edges"
 203 '
 204
 205 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 206 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 207
 208 test_expect_success 'build graph using --reachable' '
 209         cd "$TRASH_DIRECTORY/full" &&
 210         git commit-graph write --reachable &&
 211         test_path_is_file $objdir/info/commit-graph &&
 212         graph_read_expect "11" "large_edges"
 213 '
 214
 215 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 216 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 217
 218 test_expect_success 'setup bare repo' '
 219         cd "$TRASH_DIRECTORY" &&
 220         git clone --bare --no-local full bare &&
 221         cd bare &&
 222         git config core.commitGraph true &&
 223         baredir="./objects"
 224 '
 225
 226 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 227 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 228
 229 test_expect_success 'write graph in bare repo' '
 230         cd "$TRASH_DIRECTORY/bare" &&
 231         git commit-graph write &&
 232         test_path_is_file $baredir/info/commit-graph &&
 233         graph_read_expect "11" "large_edges"
 234 '
 235
 236 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 237 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 238
 239 test_expect_success 'perform fast-forward merge in full repo' '
 240         cd "$TRASH_DIRECTORY/full" &&
 241         git checkout -b merge-5-to-8 commits/5 &&
 242         git merge commits/8 &&
 243         git show-ref -s merge-5-to-8 >output &&
 244         git show-ref -s commits/8 >expect &&
 245         test_cmp expect output
 246 '
 247
 248 test_expect_success 'check that gc computes commit-graph' '
 249         cd "$TRASH_DIRECTORY/full" &&
 250         git commit --allow-empty -m "blank" &&
 251         git commit-graph write --reachable &&
 252         cp $objdir/info/commit-graph commit-graph-before-gc &&
 253         git reset --hard HEAD~1 &&
 254         git config gc.writeCommitGraph true &&
 255         git gc &&
 256         cp $objdir/info/commit-graph commit-graph-after-gc &&
 257         ! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
 258         git commit-graph write --reachable &&
 259         test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
 260 '
 261
 262 # the verify tests below expect the commit-graph to contain
 263 # exactly the commits reachable from the commits/8 branch.
 264 # If the file changes the set of commits in the list, then the
 265 # offsets into the binary file will result in different edits
 266 # and the tests will likely break.
 267
 268 test_expect_success 'git commit-graph verify' '
 269         cd "$TRASH_DIRECTORY/full" &&
 270         git rev-parse commits/8 | git commit-graph write --stdin-commits &&
 271         git commit-graph verify >output
 272 '
 273
 274 NUM_COMMITS=9
 275 NUM_OCTOPUS_EDGES=2
 276 HASH_LEN=20
 277 GRAPH_BYTE_VERSION=4
 278 GRAPH_BYTE_HASH=5
 279 GRAPH_BYTE_CHUNK_COUNT=6
 280 GRAPH_CHUNK_LOOKUP_OFFSET=8
 281 GRAPH_CHUNK_LOOKUP_WIDTH=12
 282 GRAPH_CHUNK_LOOKUP_ROWS=5
 283 GRAPH_BYTE_OID_FANOUT_ID=$GRAPH_CHUNK_LOOKUP_OFFSET
 284 GRAPH_BYTE_OID_LOOKUP_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 285                             1 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 286 GRAPH_BYTE_COMMIT_DATA_ID=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 287                              2 * $GRAPH_CHUNK_LOOKUP_WIDTH))
 288 GRAPH_FANOUT_OFFSET=$(($GRAPH_CHUNK_LOOKUP_OFFSET + \
 289                        $GRAPH_CHUNK_LOOKUP_WIDTH * $GRAPH_CHUNK_LOOKUP_ROWS))
 290 GRAPH_BYTE_FANOUT1=$(($GRAPH_FANOUT_OFFSET + 4 * 4))
 291 GRAPH_BYTE_FANOUT2=$(($GRAPH_FANOUT_OFFSET + 4 * 255))
 292 GRAPH_OID_LOOKUP_OFFSET=$(($GRAPH_FANOUT_OFFSET + 4 * 256))
 293 GRAPH_BYTE_OID_LOOKUP_ORDER=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 8))
 294 GRAPH_BYTE_OID_LOOKUP_MISSING=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * 4 + 10))
 295 GRAPH_COMMIT_DATA_OFFSET=$(($GRAPH_OID_LOOKUP_OFFSET + $HASH_LEN * $NUM_COMMITS))
 296 GRAPH_BYTE_COMMIT_TREE=$GRAPH_COMMIT_DATA_OFFSET
 297 GRAPH_BYTE_COMMIT_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN))
 298 GRAPH_BYTE_COMMIT_EXTRA_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 4))
 299 GRAPH_BYTE_COMMIT_WRONG_PARENT=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 3))
 300 GRAPH_BYTE_COMMIT_GENERATION=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 11))
 301 GRAPH_BYTE_COMMIT_DATE=$(($GRAPH_COMMIT_DATA_OFFSET + $HASH_LEN + 12))
 302 GRAPH_COMMIT_DATA_WIDTH=$(($HASH_LEN + 16))
 303 GRAPH_OCTOPUS_DATA_OFFSET=$(($GRAPH_COMMIT_DATA_OFFSET + \
 304                              $GRAPH_COMMIT_DATA_WIDTH * $NUM_COMMITS))
 305 GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 306 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 307
 308 # usage: corrupt_graph_and_verify <position> <data> <string>
 309 # Manipulates the commit-graph file at the position
 310 # by inserting the data, then runs 'git commit-graph verify'
 311 # and places the output in the file 'err'. Test 'err' for
 312 # the given string.
 313 corrupt_graph_and_verify() {
 314         pos=$1
 315         data="${2:-\0}"
 316         grepstr=$3
 317         cd "$TRASH_DIRECTORY/full" &&
 318         test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
 319         cp $objdir/info/commit-graph commit-graph-backup &&
 320         printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
 321         test_must_fail git commit-graph verify 2>test_err &&
 322         grep -v "^+" test_err >err
 323         test_i18ngrep "$grepstr" err
 324 }
 325
 326 test_expect_success 'detect bad signature' '
 327         corrupt_graph_and_verify 0 "\0" \
 328                 "graph signature"
 329 '
 330
 331 test_expect_success 'detect bad version' '
 332         corrupt_graph_and_verify $GRAPH_BYTE_VERSION "\02" \
 333                 "graph version"
 334 '
 335
 336 test_expect_success 'detect bad hash version' '
 337         corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
 338                 "hash version"
 339 '
 340
 341 test_expect_success 'detect low chunk count' '
 342         corrupt_graph_and_verify $GRAPH_BYTE_CHUNK_COUNT "\02" \
 343                 "missing the .* chunk"
 344 '
 345
 346 test_expect_success 'detect missing OID fanout chunk' '
 347         corrupt_graph_and_verify $GRAPH_BYTE_OID_FANOUT_ID "\0" \
 348                 "missing the OID Fanout chunk"
 349 '
 350
 351 test_expect_success 'detect missing OID lookup chunk' '
 352         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ID "\0" \
 353                 "missing the OID Lookup chunk"
 354 '
 355
 356 test_expect_success 'detect missing commit data chunk' '
 357         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATA_ID "\0" \
 358                 "missing the Commit Data chunk"
 359 '
 360
 361 test_expect_success 'detect incorrect fanout' '
 362         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT1 "\01" \
 363                 "fanout value"
 364 '
 365
 366 test_expect_success 'detect incorrect fanout final value' '
 367         corrupt_graph_and_verify $GRAPH_BYTE_FANOUT2 "\01" \
 368                 "fanout value"
 369 '
 370
 371 test_expect_success 'detect incorrect OID order' '
 372         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_ORDER "\01" \
 373                 "incorrect OID order"
 374 '
 375
 376 test_expect_success 'detect OID not in object database' '
 377         corrupt_graph_and_verify $GRAPH_BYTE_OID_LOOKUP_MISSING "\01" \
 378                 "from object database"
 379 '
 380
 381 test_expect_success 'detect incorrect tree OID' '
 382         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_TREE "\01" \
 383                 "root tree OID for commit"
 384 '
 385
 386 test_expect_success 'detect incorrect parent int-id' '
 387         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_PARENT "\01" \
 388                 "invalid parent"
 389 '
 390
 391 test_expect_success 'detect extra parent int-id' '
 392         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_EXTRA_PARENT "\00" \
 393                 "is too long"
 394 '
 395
 396 test_expect_success 'detect wrong parent' '
 397         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_WRONG_PARENT "\01" \
 398                 "commit-graph parent for"
 399 '
 400
 401 test_expect_success 'detect incorrect generation number' '
 402         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\070" \
 403                 "generation for commit"
 404 '
 405
 406 test_expect_success 'detect incorrect generation number' '
 407         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_GENERATION "\01" \
 408                 "non-zero generation number"
 409 '
 410
 411 test_expect_success 'detect incorrect commit date' '
 412         corrupt_graph_and_verify $GRAPH_BYTE_COMMIT_DATE "\01" \
 413                 "commit date"
 414 '
 415
 416 test_expect_success 'detect incorrect parent for octopus merge' '
 417         corrupt_graph_and_verify $GRAPH_BYTE_OCTOPUS "\01" \
 418                 "invalid parent"
 419 '
 420
 421 test_expect_success 'detect invalid checksum hash' '
 422         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 423                 "incorrect checksum"
 424 '
 425
 426 test_expect_success 'git fsck (checks commit-graph)' '
 427         cd "$TRASH_DIRECTORY/full" &&
 428         git fsck &&
 429         corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 430                 "incorrect checksum" &&
 431         test_must_fail git fsck
 432 '
 433
 434 test_done