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   1 #!/bin/sh
   2
   3 test_description='split commit graph'
   4 . ./test-lib.sh
   5
   6 GIT_TEST_COMMIT_GRAPH=0
   7
   8 test_expect_success 'setup repo' '
   9         git init &&
  10         git config core.commitGraph true &&
  11         git config gc.writeCommitGraph false &&
  12         infodir=".git/objects/info" &&
  13         graphdir="$infodir/commit-graphs" &&
  14         test_oid_init &&
  15         test_oid_cache <<-EOM
  16         shallow sha1:1760
  17         shallow sha256:2064
  18
  19         base sha1:1376
  20         base sha256:1496
  21         EOM
  22 '
  23
  24 graph_read_expect() {
  25         NUM_BASE=0
  26         if test ! -z $2
  27         then
  28                 NUM_BASE=$2
  29         fi
  30         cat >expect <<- EOF
  31         header: 43475048 1 1 3 $NUM_BASE
  32         num_commits: $1
  33         chunks: oid_fanout oid_lookup commit_metadata
  34         EOF
  35         test-tool read-graph >output &&
  36         test_cmp expect output
  37 }
  38
  39 test_expect_success 'create commits and write commit-graph' '
  40         for i in $(test_seq 3)
  41         do
  42                 test_commit $i &&
  43                 git branch commits/$i || return 1
  44         done &&
  45         git commit-graph write --reachable &&
  46         test_path_is_file $infodir/commit-graph &&
  47         graph_read_expect 3
  48 '
  49
  50 graph_git_two_modes() {
  51         git -c core.commitGraph=true $1 >output
  52         git -c core.commitGraph=false $1 >expect
  53         test_cmp expect output
  54 }
  55
  56 graph_git_behavior() {
  57         MSG=$1
  58         BRANCH=$2
  59         COMPARE=$3
  60         test_expect_success "check normal git operations: $MSG" '
  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 'graph exists' commits/3 commits/1
  70
  71 verify_chain_files_exist() {
  72         for hash in $(cat $1/commit-graph-chain)
  73         do
  74                 test_path_is_file $1/graph-$hash.graph || return 1
  75         done
  76 }
  77
  78 test_expect_success 'add more commits, and write a new base graph' '
  79         git reset --hard commits/1 &&
  80         for i in $(test_seq 4 5)
  81         do
  82                 test_commit $i &&
  83                 git branch commits/$i || return 1
  84         done &&
  85         git reset --hard commits/2 &&
  86         for i in $(test_seq 6 10)
  87         do
  88                 test_commit $i &&
  89                 git branch commits/$i || return 1
  90         done &&
  91         git reset --hard commits/2 &&
  92         git merge commits/4 &&
  93         git branch merge/1 &&
  94         git reset --hard commits/4 &&
  95         git merge commits/6 &&
  96         git branch merge/2 &&
  97         git commit-graph write --reachable &&
  98         graph_read_expect 12
  99 '
 100
 101 test_expect_success 'fork and fail to base a chain on a commit-graph file' '
 102         test_when_finished rm -rf fork &&
 103         git clone . fork &&
 104         (
 105                 cd fork &&
 106                 rm .git/objects/info/commit-graph &&
 107                 echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
 108                 test_commit new-commit &&
 109                 git commit-graph write --reachable --split &&
 110                 test_path_is_file $graphdir/commit-graph-chain &&
 111                 test_line_count = 1 $graphdir/commit-graph-chain &&
 112                 verify_chain_files_exist $graphdir
 113         )
 114 '
 115
 116 test_expect_success 'add three more commits, write a tip graph' '
 117         git reset --hard commits/3 &&
 118         git merge merge/1 &&
 119         git merge commits/5 &&
 120         git merge merge/2 &&
 121         git branch merge/3 &&
 122         git commit-graph write --reachable --split &&
 123         test_path_is_missing $infodir/commit-graph &&
 124         test_path_is_file $graphdir/commit-graph-chain &&
 125         ls $graphdir/graph-*.graph >graph-files &&
 126         test_line_count = 2 graph-files &&
 127         verify_chain_files_exist $graphdir
 128 '
 129
 130 graph_git_behavior 'split commit-graph: merge 3 vs 2' merge/3 merge/2
 131
 132 test_expect_success 'add one commit, write a tip graph' '
 133         test_commit 11 &&
 134         git branch commits/11 &&
 135         git commit-graph write --reachable --split &&
 136         test_path_is_missing $infodir/commit-graph &&
 137         test_path_is_file $graphdir/commit-graph-chain &&
 138         ls $graphdir/graph-*.graph >graph-files &&
 139         test_line_count = 3 graph-files &&
 140         verify_chain_files_exist $graphdir
 141 '
 142
 143 graph_git_behavior 'three-layer commit-graph: commit 11 vs 6' commits/11 commits/6
 144
 145 test_expect_success 'add one commit, write a merged graph' '
 146         test_commit 12 &&
 147         git branch commits/12 &&
 148         git commit-graph write --reachable --split &&
 149         test_path_is_file $graphdir/commit-graph-chain &&
 150         test_line_count = 2 $graphdir/commit-graph-chain &&
 151         ls $graphdir/graph-*.graph >graph-files &&
 152         test_line_count = 2 graph-files &&
 153         verify_chain_files_exist $graphdir
 154 '
 155
 156 graph_git_behavior 'merged commit-graph: commit 12 vs 6' commits/12 commits/6
 157
 158 test_expect_success 'create fork and chain across alternate' '
 159         git clone . fork &&
 160         (
 161                 cd fork &&
 162                 git config core.commitGraph true &&
 163                 rm -rf $graphdir &&
 164                 echo "$(pwd)/../.git/objects" >.git/objects/info/alternates &&
 165                 test_commit 13 &&
 166                 git branch commits/13 &&
 167                 git commit-graph write --reachable --split &&
 168                 test_path_is_file $graphdir/commit-graph-chain &&
 169                 test_line_count = 3 $graphdir/commit-graph-chain &&
 170                 ls $graphdir/graph-*.graph >graph-files &&
 171                 test_line_count = 1 graph-files &&
 172                 git -c core.commitGraph=true  rev-list HEAD >expect &&
 173                 git -c core.commitGraph=false rev-list HEAD >actual &&
 174                 test_cmp expect actual &&
 175                 test_commit 14 &&
 176                 git commit-graph write --reachable --split --object-dir=.git/objects/ &&
 177                 test_line_count = 3 $graphdir/commit-graph-chain &&
 178                 ls $graphdir/graph-*.graph >graph-files &&
 179                 test_line_count = 1 graph-files
 180         )
 181 '
 182
 183 graph_git_behavior 'alternate: commit 13 vs 6' commits/13 commits/6
 184
 185 test_expect_success 'test merge stragety constants' '
 186         git clone . merge-2 &&
 187         (
 188                 cd merge-2 &&
 189                 git config core.commitGraph true &&
 190                 test_line_count = 2 $graphdir/commit-graph-chain &&
 191                 test_commit 14 &&
 192                 git commit-graph write --reachable --split --size-multiple=2 &&
 193                 test_line_count = 3 $graphdir/commit-graph-chain
 194
 195         ) &&
 196         git clone . merge-10 &&
 197         (
 198                 cd merge-10 &&
 199                 git config core.commitGraph true &&
 200                 test_line_count = 2 $graphdir/commit-graph-chain &&
 201                 test_commit 14 &&
 202                 git commit-graph write --reachable --split --size-multiple=10 &&
 203                 test_line_count = 1 $graphdir/commit-graph-chain &&
 204                 ls $graphdir/graph-*.graph >graph-files &&
 205                 test_line_count = 1 graph-files
 206         ) &&
 207         git clone . merge-10-expire &&
 208         (
 209                 cd merge-10-expire &&
 210                 git config core.commitGraph true &&
 211                 test_line_count = 2 $graphdir/commit-graph-chain &&
 212                 test_commit 15 &&
 213                 git commit-graph write --reachable --split --size-multiple=10 --expire-time=1980-01-01 &&
 214                 test_line_count = 1 $graphdir/commit-graph-chain &&
 215                 ls $graphdir/graph-*.graph >graph-files &&
 216                 test_line_count = 3 graph-files
 217         ) &&
 218         git clone --no-hardlinks . max-commits &&
 219         (
 220                 cd max-commits &&
 221                 git config core.commitGraph true &&
 222                 test_line_count = 2 $graphdir/commit-graph-chain &&
 223                 test_commit 16 &&
 224                 test_commit 17 &&
 225                 git commit-graph write --reachable --split --max-commits=1 &&
 226                 test_line_count = 1 $graphdir/commit-graph-chain &&
 227                 ls $graphdir/graph-*.graph >graph-files &&
 228                 test_line_count = 1 graph-files
 229         )
 230 '
 231
 232 test_expect_success 'remove commit-graph-chain file after flattening' '
 233         git clone . flatten &&
 234         (
 235                 cd flatten &&
 236                 test_line_count = 2 $graphdir/commit-graph-chain &&
 237                 git commit-graph write --reachable &&
 238                 test_path_is_missing $graphdir/commit-graph-chain &&
 239                 ls $graphdir >graph-files &&
 240                 test_line_count = 0 graph-files
 241         )
 242 '
 243
 244 corrupt_file() {
 245         file=$1
 246         pos=$2
 247         data="${3:-\0}"
 248         chmod a+w "$file" &&
 249         printf "$data" | dd of="$file" bs=1 seek="$pos" conv=notrunc
 250 }
 251
 252 test_expect_success 'verify hashes along chain, even in shallow' '
 253         git clone --no-hardlinks . verify &&
 254         (
 255                 cd verify &&
 256                 git commit-graph verify &&
 257                 base_file=$graphdir/graph-$(head -n 1 $graphdir/commit-graph-chain).graph &&
 258                 corrupt_file "$base_file" $(test_oid shallow) "\01" &&
 259                 test_must_fail git commit-graph verify --shallow 2>test_err &&
 260                 grep -v "^+" test_err >err &&
 261                 test_i18ngrep "incorrect checksum" err
 262         )
 263 '
 264
 265 test_expect_success 'verify --shallow does not check base contents' '
 266         git clone --no-hardlinks . verify-shallow &&
 267         (
 268                 cd verify-shallow &&
 269                 git commit-graph verify &&
 270                 base_file=$graphdir/graph-$(head -n 1 $graphdir/commit-graph-chain).graph &&
 271                 corrupt_file "$base_file" 1000 "\01" &&
 272                 git commit-graph verify --shallow &&
 273                 test_must_fail git commit-graph verify 2>test_err &&
 274                 grep -v "^+" test_err >err &&
 275                 test_i18ngrep "incorrect checksum" err
 276         )
 277 '
 278
 279 test_expect_success 'warn on base graph chunk incorrect' '
 280         git clone --no-hardlinks . base-chunk &&
 281         (
 282                 cd base-chunk &&
 283                 git commit-graph verify &&
 284                 base_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
 285                 corrupt_file "$base_file" $(test_oid base) "\01" &&
 286                 git commit-graph verify --shallow 2>test_err &&
 287                 grep -v "^+" test_err >err &&
 288                 test_i18ngrep "commit-graph chain does not match" err
 289         )
 290 '
 291
 292 test_expect_success 'verify after commit-graph-chain corruption' '
 293         git clone --no-hardlinks . verify-chain &&
 294         (
 295                 cd verify-chain &&
 296                 corrupt_file "$graphdir/commit-graph-chain" 60 "G" &&
 297                 git commit-graph verify 2>test_err &&
 298                 grep -v "^+" test_err >err &&
 299                 test_i18ngrep "invalid commit-graph chain" err &&
 300                 corrupt_file "$graphdir/commit-graph-chain" 60 "A" &&
 301                 git commit-graph verify 2>test_err &&
 302                 grep -v "^+" test_err >err &&
 303                 test_i18ngrep "unable to find all commit-graph files" err
 304         )
 305 '
 306
 307 test_expect_success 'verify across alternates' '
 308         git clone --no-hardlinks . verify-alt &&
 309         (
 310                 cd verify-alt &&
 311                 rm -rf $graphdir &&
 312                 altdir="$(pwd)/../.git/objects" &&
 313                 echo "$altdir" >.git/objects/info/alternates &&
 314                 git commit-graph verify --object-dir="$altdir/" &&
 315                 test_commit extra &&
 316                 git commit-graph write --reachable --split &&
 317                 tip_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
 318                 corrupt_file "$tip_file" 100 "\01" &&
 319                 test_must_fail git commit-graph verify --shallow 2>test_err &&
 320                 grep -v "^+" test_err >err &&
 321                 test_i18ngrep "commit-graph has incorrect fanout value" err
 322         )
 323 '
 324
 325 test_expect_success 'add octopus merge' '
 326         git reset --hard commits/10 &&
 327         git merge commits/3 commits/4 &&
 328         git branch merge/octopus &&
 329         git commit-graph write --reachable --split &&
 330         git commit-graph verify --progress 2>err &&
 331         test_line_count = 3 err &&
 332         test_i18ngrep ! warning err &&
 333         test_line_count = 3 $graphdir/commit-graph-chain
 334 '
 335
 336 graph_git_behavior 'graph exists' merge/octopus commits/12
 337
 338 test_expect_success 'split across alternate where alternate is not split' '
 339         git commit-graph write --reachable &&
 340         test_path_is_file .git/objects/info/commit-graph &&
 341         cp .git/objects/info/commit-graph . &&
 342         git clone --no-hardlinks . alt-split &&
 343         (
 344                 cd alt-split &&
 345                 rm -f .git/objects/info/commit-graph &&
 346                 echo "$(pwd)"/../.git/objects >.git/objects/info/alternates &&
 347                 test_commit 18 &&
 348                 git commit-graph write --reachable --split &&
 349                 test_line_count = 1 $graphdir/commit-graph-chain
 350         ) &&
 351         test_cmp commit-graph .git/objects/info/commit-graph
 352 '
 353
 354 test_done