t/t0610-reftable-basics.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2020 Google LLC
   4 #
   5
   6 test_description='reftable basics'
   7
   8 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
   9 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
  10 GIT_TEST_DEFAULT_REF_FORMAT=reftable
  11 export GIT_TEST_DEFAULT_REF_FORMAT
  12
  13 TEST_PASSES_SANITIZE_LEAK=true
  14 . ./test-lib.sh
  15
  16 INVALID_OID=$(test_oid 001)
  17
  18 test_expect_success 'init: creates basic reftable structures' '
  19         test_when_finished "rm -rf repo" &&
  20         git init repo &&
  21         test_path_is_dir repo/.git/reftable &&
  22         test_path_is_file repo/.git/reftable/tables.list &&
  23         echo reftable >expect &&
  24         git -C repo rev-parse --show-ref-format >actual &&
  25         test_cmp expect actual
  26 '
  27
  28 test_expect_success 'init: sha256 object format via environment variable' '
  29         test_when_finished "rm -rf repo" &&
  30         GIT_DEFAULT_HASH=sha256 git init repo &&
  31         cat >expect <<-EOF &&
  32         sha256
  33         reftable
  34         EOF
  35         git -C repo rev-parse --show-object-format --show-ref-format >actual &&
  36         test_cmp expect actual
  37 '
  38
  39 test_expect_success 'init: sha256 object format via option' '
  40         test_when_finished "rm -rf repo" &&
  41         git init --object-format=sha256 repo &&
  42         cat >expect <<-EOF &&
  43         sha256
  44         reftable
  45         EOF
  46         git -C repo rev-parse --show-object-format --show-ref-format >actual &&
  47         test_cmp expect actual
  48 '
  49
  50 test_expect_success 'init: reinitializing reftable backend succeeds' '
  51         test_when_finished "rm -rf repo" &&
  52         git init repo &&
  53         test_commit -C repo A &&
  54
  55         git -C repo for-each-ref >expect &&
  56         git init --ref-format=reftable repo &&
  57         git -C repo for-each-ref >actual &&
  58         test_cmp expect actual
  59 '
  60
  61 test_expect_success 'init: reinitializing files with reftable backend fails' '
  62         test_when_finished "rm -rf repo" &&
  63         git init --ref-format=files repo &&
  64         test_commit -C repo file &&
  65
  66         cp repo/.git/HEAD expect &&
  67         test_must_fail git init --ref-format=reftable repo &&
  68         test_cmp expect repo/.git/HEAD
  69 '
  70
  71 test_expect_success 'init: reinitializing reftable with files backend fails' '
  72         test_when_finished "rm -rf repo" &&
  73         git init --ref-format=reftable repo &&
  74         test_commit -C repo file &&
  75
  76         cp repo/.git/HEAD expect &&
  77         test_must_fail git init --ref-format=files repo &&
  78         test_cmp expect repo/.git/HEAD
  79 '
  80
  81 test_expect_perms () {
  82         local perms="$1" &&
  83         local file="$2" &&
  84         local actual="$(ls -l "$file")" &&
  85
  86         case "$actual" in
  87         $perms*)
  88                 : happy
  89                 ;;
  90         *)
  91                 echo "$(basename $2) is not $perms but $actual"
  92                 false
  93                 ;;
  94         esac
  95 }
  96
  97 test_expect_reftable_perms () {
  98         local umask="$1"
  99         local shared="$2"
 100         local expect="$3"
 101
 102         test_expect_success POSIXPERM "init: honors --shared=$shared with umask $umask" '
 103                 test_when_finished "rm -rf repo" &&
 104                 (
 105                         umask $umask &&
 106                         git init --shared=$shared repo
 107                 ) &&
 108                 test_expect_perms "$expect" repo/.git/reftable/tables.list &&
 109                 for table in repo/.git/reftable/*.ref
 110                 do
 111                         test_expect_perms "$expect" "$table" ||
 112                         return 1
 113                 done
 114         '
 115
 116         test_expect_success POSIXPERM "pack-refs: honors --shared=$shared with umask $umask" '
 117                 test_when_finished "rm -rf repo" &&
 118                 (
 119                         umask $umask &&
 120                         git init --shared=$shared repo &&
 121                         test_commit -C repo A &&
 122                         test_line_count = 2 repo/.git/reftable/tables.list &&
 123                         git -C repo pack-refs
 124                 ) &&
 125                 test_expect_perms "$expect" repo/.git/reftable/tables.list &&
 126                 for table in repo/.git/reftable/*.ref
 127                 do
 128                         test_expect_perms "$expect" "$table" ||
 129                         return 1
 130                 done
 131         '
 132 }
 133
 134 test_expect_reftable_perms 002 umask "-rw-rw-r--"
 135 test_expect_reftable_perms 022 umask "-rw-r--r--"
 136 test_expect_reftable_perms 027 umask "-rw-r-----"
 137
 138 test_expect_reftable_perms 002 group "-rw-rw-r--"
 139 test_expect_reftable_perms 022 group "-rw-rw-r--"
 140 test_expect_reftable_perms 027 group "-rw-rw----"
 141
 142 test_expect_reftable_perms 002 world "-rw-rw-r--"
 143 test_expect_reftable_perms 022 world "-rw-rw-r--"
 144 test_expect_reftable_perms 027 world "-rw-rw-r--"
 145
 146 test_expect_success 'clone: can clone reftable repository' '
 147         test_when_finished "rm -rf repo clone" &&
 148         git init repo &&
 149         test_commit -C repo message1 file1 &&
 150
 151         git clone repo cloned &&
 152         echo reftable >expect &&
 153         git -C cloned rev-parse --show-ref-format >actual &&
 154         test_cmp expect actual &&
 155         test_path_is_file cloned/file1
 156 '
 157
 158 test_expect_success 'clone: can clone reffiles into reftable repository' '
 159         test_when_finished "rm -rf reffiles reftable" &&
 160         git init --ref-format=files reffiles &&
 161         test_commit -C reffiles A &&
 162         git clone --ref-format=reftable ./reffiles reftable &&
 163
 164         git -C reffiles rev-parse HEAD >expect &&
 165         git -C reftable rev-parse HEAD >actual &&
 166         test_cmp expect actual &&
 167
 168         git -C reftable rev-parse --show-ref-format >actual &&
 169         echo reftable >expect &&
 170         test_cmp expect actual &&
 171
 172         git -C reffiles rev-parse --show-ref-format >actual &&
 173         echo files >expect &&
 174         test_cmp expect actual
 175 '
 176
 177 test_expect_success 'clone: can clone reftable into reffiles repository' '
 178         test_when_finished "rm -rf reffiles reftable" &&
 179         git init --ref-format=reftable reftable &&
 180         test_commit -C reftable A &&
 181         git clone --ref-format=files ./reftable reffiles &&
 182
 183         git -C reftable rev-parse HEAD >expect &&
 184         git -C reffiles rev-parse HEAD >actual &&
 185         test_cmp expect actual &&
 186
 187         git -C reftable rev-parse --show-ref-format >actual &&
 188         echo reftable >expect &&
 189         test_cmp expect actual &&
 190
 191         git -C reffiles rev-parse --show-ref-format >actual &&
 192         echo files >expect &&
 193         test_cmp expect actual
 194 '
 195
 196 test_expect_success 'ref transaction: corrupted tables cause failure' '
 197         test_when_finished "rm -rf repo" &&
 198         git init repo &&
 199         (
 200                 cd repo &&
 201                 test_commit file1 &&
 202                 for f in .git/reftable/*.ref
 203                 do
 204                         : >"$f" || return 1
 205                 done &&
 206                 test_must_fail git update-ref refs/heads/main HEAD
 207         )
 208 '
 209
 210 test_expect_success 'ref transaction: corrupted tables.list cause failure' '
 211         test_when_finished "rm -rf repo" &&
 212         git init repo &&
 213         (
 214                 cd repo &&
 215                 test_commit file1 &&
 216                 echo garbage >.git/reftable/tables.list &&
 217                 test_must_fail git update-ref refs/heads/main HEAD
 218         )
 219 '
 220
 221 test_expect_success 'ref transaction: refuses to write ref causing F/D conflict' '
 222         test_when_finished "rm -rf repo" &&
 223         git init repo &&
 224         test_commit -C repo file &&
 225         test_must_fail git -C repo update-ref refs/heads/main/forbidden
 226 '
 227
 228 test_expect_success 'ref transaction: deleting ref with invalid name fails' '
 229         test_when_finished "rm -rf repo" &&
 230         git init repo &&
 231         test_commit -C repo file &&
 232         test_must_fail git -C repo update-ref -d ../../my-private-file
 233 '
 234
 235 test_expect_success 'ref transaction: can skip object ID verification' '
 236         test_when_finished "rm -rf repo" &&
 237         git init repo &&
 238         test_must_fail test-tool -C repo ref-store main update-ref msg refs/heads/branch $INVALID_OID $ZERO_OID 0 &&
 239         test-tool -C repo ref-store main update-ref msg refs/heads/branch $INVALID_OID $ZERO_OID REF_SKIP_OID_VERIFICATION
 240 '
 241
 242 test_expect_success 'ref transaction: updating same ref multiple times fails' '
 243         test_when_finished "rm -rf repo" &&
 244         git init repo &&
 245         test_commit -C repo A &&
 246         cat >updates <<-EOF &&
 247         update refs/heads/main $A
 248         update refs/heads/main $A
 249         EOF
 250         cat >expect <<-EOF &&
 251         fatal: multiple updates for ref ${SQ}refs/heads/main${SQ} not allowed
 252         EOF
 253         test_must_fail git -C repo update-ref --stdin <updates 2>err &&
 254         test_cmp expect err
 255 '
 256
 257 test_expect_success 'ref transaction: can delete symbolic self-reference with git-symbolic-ref(1)' '
 258         test_when_finished "rm -rf repo" &&
 259         git init repo &&
 260         git -C repo symbolic-ref refs/heads/self refs/heads/self &&
 261         git -C repo symbolic-ref -d refs/heads/self
 262 '
 263
 264 test_expect_success 'ref transaction: deleting symbolic self-reference without --no-deref fails' '
 265         test_when_finished "rm -rf repo" &&
 266         git init repo &&
 267         git -C repo symbolic-ref refs/heads/self refs/heads/self &&
 268         cat >expect <<-EOF &&
 269         error: multiple updates for ${SQ}refs/heads/self${SQ} (including one via symref ${SQ}refs/heads/self${SQ}) are not allowed
 270         EOF
 271         test_must_fail git -C repo update-ref -d refs/heads/self 2>err &&
 272         test_cmp expect err
 273 '
 274
 275 test_expect_success 'ref transaction: deleting symbolic self-reference with --no-deref succeeds' '
 276         test_when_finished "rm -rf repo" &&
 277         git init repo &&
 278         git -C repo symbolic-ref refs/heads/self refs/heads/self &&
 279         git -C repo update-ref -d --no-deref refs/heads/self
 280 '
 281
 282 test_expect_success 'ref transaction: creating symbolic ref fails with F/D conflict' '
 283         test_when_finished "rm -rf repo" &&
 284         git init repo &&
 285         test_commit -C repo A &&
 286         cat >expect <<-EOF &&
 287         error: ${SQ}refs/heads/main${SQ} exists; cannot create ${SQ}refs/heads${SQ}
 288         EOF
 289         test_must_fail git -C repo symbolic-ref refs/heads refs/heads/foo 2>err &&
 290         test_cmp expect err
 291 '
 292
 293 test_expect_success 'ref transaction: ref deletion' '
 294         test_when_finished "rm -rf repo" &&
 295         git init repo &&
 296         (
 297                 cd repo &&
 298                 test_commit file &&
 299                 HEAD_OID=$(git show-ref -s --verify HEAD) &&
 300                 cat >expect <<-EOF &&
 301                 $HEAD_OID refs/heads/main
 302                 $HEAD_OID refs/tags/file
 303                 EOF
 304                 git show-ref >actual &&
 305                 test_cmp expect actual &&
 306
 307                 test_must_fail git update-ref -d refs/tags/file $INVALID_OID &&
 308                 git show-ref >actual &&
 309                 test_cmp expect actual &&
 310
 311                 git update-ref -d refs/tags/file $HEAD_OID &&
 312                 echo "$HEAD_OID refs/heads/main" >expect &&
 313                 git show-ref >actual &&
 314                 test_cmp expect actual
 315         )
 316 '
 317
 318 test_expect_success 'ref transaction: writes cause auto-compaction' '
 319         test_when_finished "rm -rf repo" &&
 320
 321         git init repo &&
 322         test_line_count = 1 repo/.git/reftable/tables.list &&
 323
 324         test_commit -C repo --no-tag A &&
 325         test_line_count = 1 repo/.git/reftable/tables.list &&
 326
 327         test_commit -C repo --no-tag B &&
 328         test_line_count = 1 repo/.git/reftable/tables.list
 329 '
 330
 331 test_expect_success 'ref transaction: env var disables compaction' '
 332         test_when_finished "rm -rf repo" &&
 333
 334         git init repo &&
 335         test_commit -C repo A &&
 336
 337         start=$(wc -l <repo/.git/reftable/tables.list) &&
 338         iterations=5 &&
 339         expected=$((start + iterations)) &&
 340
 341         for i in $(test_seq $iterations)
 342         do
 343                 GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 344                 git -C repo update-ref branch-$i HEAD || return 1
 345         done &&
 346         test_line_count = $expected repo/.git/reftable/tables.list &&
 347
 348         git -C repo update-ref foo HEAD &&
 349         test_line_count -lt $expected repo/.git/reftable/tables.list
 350 '
 351
 352 test_expect_success 'ref transaction: alternating table sizes are compacted' '
 353         test_when_finished "rm -rf repo" &&
 354
 355         git init repo &&
 356         test_commit -C repo A &&
 357         for i in $(test_seq 5)
 358         do
 359                 git -C repo branch -f foo &&
 360                 git -C repo branch -d foo || return 1
 361         done &&
 362         test_line_count = 2 repo/.git/reftable/tables.list
 363 '
 364
 365 check_fsync_events () {
 366         local trace="$1" &&
 367         shift &&
 368
 369         cat >expect &&
 370         sed -n \
 371                 -e '/^{"event":"counter",.*"category":"fsync",/ {
 372                         s/.*"category":"fsync",//;
 373                         s/}$//;
 374                         p;
 375                 }' \
 376                 <"$trace" >actual &&
 377         test_cmp expect actual
 378 }
 379
 380 test_expect_success 'ref transaction: writes are synced' '
 381         test_when_finished "rm -rf repo" &&
 382         git init repo &&
 383         test_commit -C repo initial &&
 384
 385         GIT_TRACE2_EVENT="$(pwd)/trace2.txt" \
 386         GIT_TEST_FSYNC=true \
 387                 git -C repo -c core.fsync=reference \
 388                 -c core.fsyncMethod=fsync update-ref refs/heads/branch HEAD &&
 389         check_fsync_events trace2.txt <<-EOF
 390         "name":"hardware-flush","count":4
 391         EOF
 392 '
 393
 394 test_expect_success 'ref transaction: empty transaction in empty repo' '
 395         test_when_finished "rm -rf repo" &&
 396         git init repo &&
 397         test_commit -C repo --no-tag A &&
 398         git -C repo update-ref -d refs/heads/main &&
 399         test-tool -C repo ref-store main delete-refs REF_NO_DEREF msg HEAD &&
 400         git -C repo update-ref --stdin <<-EOF
 401         prepare
 402         commit
 403         EOF
 404 '
 405
 406 test_expect_success 'ref transaction: fails gracefully when auto compaction fails' '
 407         test_when_finished "rm -rf repo" &&
 408         git init repo &&
 409         (
 410                 cd repo &&
 411
 412                 test_commit A &&
 413                 for i in $(test_seq 10)
 414                 do
 415                         git branch branch-$i &&
 416                         for table in .git/reftable/*.ref
 417                         do
 418                                 touch "$table.lock" || exit 1
 419                         done ||
 420                         exit 1
 421                 done &&
 422                 test_line_count = 10 .git/reftable/tables.list
 423         )
 424 '
 425
 426 test_expect_success 'ref transaction: timeout acquiring tables.list lock' '
 427         test_when_finished "rm -rf repo" &&
 428         git init repo &&
 429         (
 430                 cd repo &&
 431                 test_commit initial &&
 432                 >.git/reftable/tables.list.lock &&
 433                 test_must_fail git update-ref refs/heads/branch HEAD 2>err &&
 434                 test_grep "cannot lock references" err
 435         )
 436 '
 437
 438 test_expect_success 'ref transaction: retry acquiring tables.list lock' '
 439         test_when_finished "rm -rf repo" &&
 440         git init repo &&
 441         (
 442                 cd repo &&
 443                 test_commit initial &&
 444                 LOCK=.git/reftable/tables.list.lock &&
 445                 >$LOCK &&
 446                 {
 447                         ( sleep 1 && rm -f $LOCK ) &
 448                 } &&
 449                 git -c reftable.lockTimeout=5000 update-ref refs/heads/branch HEAD
 450         )
 451 '
 452
 453 # This test fails most of the time on Windows systems. The root cause is
 454 # that Windows does not allow us to rename the "tables.list.lock" file into
 455 # place when "tables.list" is open for reading by a concurrent process.
 456 test_expect_success !WINDOWS 'ref transaction: many concurrent writers' '
 457         test_when_finished "rm -rf repo" &&
 458         git init repo &&
 459         (
 460                 cd repo &&
 461                 # Set a high timeout. While a couple of seconds should be
 462                 # plenty, using the address sanitizer will significantly slow
 463                 # us down here. So we are aiming way higher than you would ever
 464                 # think is necessary just to keep us from flaking. We could
 465                 # also lock indefinitely by passing -1, but that could
 466                 # potentially block CI jobs indefinitely if there was a bug
 467                 # here.
 468                 git config set reftable.lockTimeout 300000 &&
 469                 test_commit --no-tag initial &&
 470
 471                 head=$(git rev-parse HEAD) &&
 472                 for i in $(test_seq 100)
 473                 do
 474                         printf "%s commit\trefs/heads/branch-%s\n" "$head" "$i" ||
 475                         return 1
 476                 done >expect &&
 477                 printf "%s commit\trefs/heads/main\n" "$head" >>expect &&
 478
 479                 for i in $(test_seq 100)
 480                 do
 481                         { git update-ref refs/heads/branch-$i HEAD& } ||
 482                         return 1
 483                 done &&
 484
 485                 wait &&
 486                 git for-each-ref --sort=v:refname >actual &&
 487                 test_cmp expect actual
 488         )
 489 '
 490
 491 test_expect_success 'pack-refs: compacts tables' '
 492         test_when_finished "rm -rf repo" &&
 493         git init repo &&
 494
 495         test_commit -C repo A &&
 496         ls -1 repo/.git/reftable >table-files &&
 497         test_line_count = 3 table-files &&
 498         test_line_count = 2 repo/.git/reftable/tables.list &&
 499
 500         git -C repo pack-refs &&
 501         ls -1 repo/.git/reftable >table-files &&
 502         test_line_count = 2 table-files &&
 503         test_line_count = 1 repo/.git/reftable/tables.list
 504 '
 505
 506 test_expect_success 'pack-refs: compaction raises locking errors' '
 507         test_when_finished "rm -rf repo" &&
 508         git init repo &&
 509         test_commit -C repo A &&
 510         touch repo/.git/reftable/tables.list.lock &&
 511         cat >expect <<-EOF &&
 512         error: unable to compact stack: data is locked
 513         EOF
 514         test_must_fail git -C repo pack-refs 2>err &&
 515         test_cmp expect err
 516 '
 517
 518 for command in pack-refs gc "maintenance run --task=pack-refs"
 519 do
 520 test_expect_success "$command: auto compaction" '
 521         test_when_finished "rm -rf repo" &&
 522         git init repo &&
 523         (
 524                 cd repo &&
 525
 526                 test_commit A &&
 527
 528                 # We need a bit of setup to ensure that git-gc(1) actually
 529                 # triggers, and that it does not write anything to the refdb.
 530                 git config gc.auto 1 &&
 531                 git config gc.autoDetach 0 &&
 532                 git config gc.reflogExpire never &&
 533                 git config gc.reflogExpireUnreachable never &&
 534                 test_oid blob17_1 | git hash-object -w --stdin &&
 535
 536                 # The tables should have been auto-compacted, and thus auto
 537                 # compaction should not have to do anything.
 538                 ls -1 .git/reftable >tables-expect &&
 539                 test_line_count = 3 tables-expect &&
 540                 git $command --auto &&
 541                 ls -1 .git/reftable >tables-actual &&
 542                 test_cmp tables-expect tables-actual &&
 543
 544                 test_oid blob17_2 | git hash-object -w --stdin &&
 545
 546                 # Lock all tables, write some refs. Auto-compaction will be
 547                 # unable to compact tables and thus fails gracefully,
 548                 # compacting only those tables which are not locked.
 549                 ls .git/reftable/*.ref | sort |
 550                 while read table
 551                 do
 552                         touch "$table.lock" &&
 553                         basename "$table" >>tables.expect || exit 1
 554                 done &&
 555                 test_line_count = 2 .git/reftable/tables.list &&
 556                 git branch B &&
 557                 git branch C &&
 558
 559                 # The new tables are auto-compacted, but the locked tables are
 560                 # left intact.
 561                 test_line_count = 3 .git/reftable/tables.list &&
 562                 head -n 2 .git/reftable/tables.list >tables.head &&
 563                 test_cmp tables.expect tables.head &&
 564
 565                 rm .git/reftable/*.lock &&
 566                 git $command --auto &&
 567                 test_line_count = 1 .git/reftable/tables.list
 568         )
 569 '
 570 done
 571
 572 test_expect_success 'pack-refs: prunes stale tables' '
 573         test_when_finished "rm -rf repo" &&
 574         git init repo &&
 575         touch repo/.git/reftable/stale-table.ref &&
 576         git -C repo pack-refs &&
 577         test_path_is_missing repo/.git/reftable/stable-ref.ref
 578 '
 579
 580 test_expect_success 'pack-refs: does not prune non-table files' '
 581         test_when_finished "rm -rf repo" &&
 582         git init repo &&
 583         touch repo/.git/reftable/garbage &&
 584         git -C repo pack-refs &&
 585         test_path_is_file repo/.git/reftable/garbage
 586 '
 587
 588 test_expect_success 'packed-refs: writes are synced' '
 589         test_when_finished "rm -rf repo" &&
 590         git init repo &&
 591         test_commit -C repo initial &&
 592         test_line_count = 2 table-files &&
 593
 594         : >trace2.txt &&
 595         GIT_TRACE2_EVENT="$(pwd)/trace2.txt" \
 596         GIT_TEST_FSYNC=true \
 597                 git -C repo -c core.fsync=reference \
 598                 -c core.fsyncMethod=fsync pack-refs &&
 599         check_fsync_events trace2.txt <<-EOF
 600         "name":"hardware-flush","count":2
 601         EOF
 602 '
 603
 604 test_expect_success 'ref iterator: bogus names are flagged' '
 605         test_when_finished "rm -rf repo" &&
 606         git init repo &&
 607         (
 608                 cd repo &&
 609                 test_commit --no-tag file &&
 610                 test-tool ref-store main update-ref msg "refs/heads/bogus..name" $(git rev-parse HEAD) $ZERO_OID REF_SKIP_REFNAME_VERIFICATION &&
 611
 612                 cat >expect <<-EOF &&
 613                 $ZERO_OID refs/heads/bogus..name 0xc
 614                 $(git rev-parse HEAD) refs/heads/main 0x0
 615                 EOF
 616                 test-tool ref-store main for-each-ref "" >actual &&
 617                 test_cmp expect actual
 618         )
 619 '
 620
 621 test_expect_success 'ref iterator: missing object IDs are not flagged' '
 622         test_when_finished "rm -rf repo" &&
 623         git init repo &&
 624         (
 625                 cd repo &&
 626                 test-tool ref-store main update-ref msg "refs/heads/broken-hash" $INVALID_OID $ZERO_OID REF_SKIP_OID_VERIFICATION &&
 627
 628                 cat >expect <<-EOF &&
 629                 $INVALID_OID refs/heads/broken-hash 0x0
 630                 EOF
 631                 test-tool ref-store main for-each-ref "" >actual &&
 632                 test_cmp expect actual
 633         )
 634 '
 635
 636 test_expect_success 'basic: commit and list refs' '
 637         test_when_finished "rm -rf repo" &&
 638         git init repo &&
 639         test_commit -C repo file &&
 640         test_write_lines refs/heads/main refs/tags/file >expect &&
 641         git -C repo for-each-ref --format="%(refname)" >actual &&
 642         test_cmp actual expect
 643 '
 644
 645 test_expect_success 'basic: can write large commit message' '
 646         test_when_finished "rm -rf repo" &&
 647         git init repo &&
 648         perl -e "
 649                 print \"this is a long commit message\" x 50000
 650         " >commit-msg &&
 651         git -C repo commit --allow-empty --file=../commit-msg
 652 '
 653
 654 test_expect_success 'basic: show-ref fails with empty repository' '
 655         test_when_finished "rm -rf repo" &&
 656         git init repo &&
 657         test_must_fail git -C repo show-ref >actual &&
 658         test_must_be_empty actual
 659 '
 660
 661 test_expect_success 'basic: can check out unborn branch' '
 662         test_when_finished "rm -rf repo" &&
 663         git init repo &&
 664         git -C repo checkout -b main
 665 '
 666
 667 test_expect_success 'basic: peeled tags are stored' '
 668         test_when_finished "rm -rf repo" &&
 669         git init repo &&
 670         test_commit -C repo file &&
 671         git -C repo tag -m "annotated tag" test_tag HEAD &&
 672         for ref in refs/heads/main refs/tags/file refs/tags/test_tag refs/tags/test_tag^{}
 673         do
 674                 echo "$(git -C repo rev-parse "$ref") $ref" || return 1
 675         done >expect &&
 676         git -C repo show-ref -d >actual &&
 677         test_cmp expect actual
 678 '
 679
 680 test_expect_success 'basic: for-each-ref can print symrefs' '
 681         test_when_finished "rm -rf repo" &&
 682         git init repo &&
 683         (
 684                 cd repo &&
 685                 test_commit file &&
 686                 git branch &&
 687                 git symbolic-ref refs/heads/sym refs/heads/main &&
 688                 cat >expected <<-EOF &&
 689                 refs/heads/main
 690                 EOF
 691                 git for-each-ref --format="%(symref)" refs/heads/sym >actual &&
 692                 test_cmp expected actual
 693         )
 694 '
 695
 696 test_expect_success 'basic: notes' '
 697         test_when_finished "rm -rf repo" &&
 698         git init repo &&
 699         (
 700                 write_script fake_editor <<-\EOF &&
 701                 echo "$MSG" >"$1"
 702                 echo "$MSG" >&2
 703                 EOF
 704
 705                 test_commit 1st &&
 706                 test_commit 2nd &&
 707                 GIT_EDITOR=./fake_editor MSG=b4 git notes add &&
 708                 GIT_EDITOR=./fake_editor MSG=b3 git notes edit &&
 709                 echo b4 >expect &&
 710                 git notes --ref commits@{1} show >actual &&
 711                 test_cmp expect actual
 712         )
 713 '
 714
 715 test_expect_success 'basic: stash' '
 716         test_when_finished "rm -rf repo" &&
 717         git init repo &&
 718         (
 719                 cd repo &&
 720                 test_commit file &&
 721                 git stash list >expect &&
 722                 test_line_count = 0 expect &&
 723
 724                 echo hoi >>file.t &&
 725                 git stash push -m stashed &&
 726                 git stash list >expect &&
 727                 test_line_count = 1 expect &&
 728
 729                 git stash clear &&
 730                 git stash list >expect &&
 731                 test_line_count = 0 expect
 732         )
 733 '
 734
 735 test_expect_success 'basic: cherry-pick' '
 736         test_when_finished "rm -rf repo" &&
 737         git init repo &&
 738         (
 739                 cd repo &&
 740                 test_commit message1 file1 &&
 741                 test_commit message2 file2 &&
 742                 git branch source &&
 743                 git checkout HEAD^ &&
 744                 test_commit message3 file3 &&
 745                 git cherry-pick source &&
 746                 test_path_is_file file2
 747         )
 748 '
 749
 750 test_expect_success 'basic: rebase' '
 751         test_when_finished "rm -rf repo" &&
 752         git init repo &&
 753         (
 754                 cd repo &&
 755                 test_commit message1 file1 &&
 756                 test_commit message2 file2 &&
 757                 git branch source &&
 758                 git checkout HEAD^ &&
 759                 test_commit message3 file3 &&
 760                 git rebase source &&
 761                 test_path_is_file file2
 762         )
 763 '
 764
 765 test_expect_success 'reflog: can delete separate reflog entries' '
 766         test_when_finished "rm -rf repo" &&
 767         git init repo &&
 768         (
 769                 cd repo &&
 770
 771                 test_commit file &&
 772                 test_commit file2 &&
 773                 test_commit file3 &&
 774                 test_commit file4 &&
 775                 git reflog >actual &&
 776                 grep file3 actual &&
 777
 778                 git reflog delete HEAD@{1} &&
 779                 git reflog >actual &&
 780                 ! grep file3 actual
 781         )
 782 '
 783
 784 test_expect_success 'reflog: can switch to previous branch' '
 785         test_when_finished "rm -rf repo" &&
 786         git init repo &&
 787         (
 788                 cd repo &&
 789                 test_commit file1 &&
 790                 git checkout -b branch1 &&
 791                 test_commit file2 &&
 792                 git checkout -b branch2 &&
 793                 git switch - &&
 794                 git rev-parse --symbolic-full-name HEAD >actual &&
 795                 echo refs/heads/branch1 >expect &&
 796                 test_cmp actual expect
 797         )
 798 '
 799
 800 test_expect_success 'reflog: copying branch writes reflog entry' '
 801         test_when_finished "rm -rf repo" &&
 802         git init repo &&
 803         (
 804                 cd repo &&
 805                 test_commit file1 &&
 806                 test_commit file2 &&
 807                 oid=$(git rev-parse --short HEAD) &&
 808                 git branch src &&
 809                 cat >expect <<-EOF &&
 810                 ${oid} dst@{0}: Branch: copied refs/heads/src to refs/heads/dst
 811                 ${oid} dst@{1}: branch: Created from main
 812                 EOF
 813                 git branch -c src dst &&
 814                 git reflog dst >actual &&
 815                 test_cmp expect actual
 816         )
 817 '
 818
 819 test_expect_success 'reflog: renaming branch writes reflog entry' '
 820         test_when_finished "rm -rf repo" &&
 821         git init repo &&
 822         (
 823                 cd repo &&
 824                 git symbolic-ref HEAD refs/heads/before &&
 825                 test_commit file &&
 826                 git show-ref >expected.refs &&
 827                 sed s/before/after/g <expected.refs >expected &&
 828                 git branch -M after &&
 829                 git show-ref >actual &&
 830                 test_cmp expected actual &&
 831                 echo refs/heads/after >expected &&
 832                 git symbolic-ref HEAD >actual &&
 833                 test_cmp expected actual
 834         )
 835 '
 836
 837 test_expect_success 'reflog: can store empty logs' '
 838         test_when_finished "rm -rf repo" &&
 839         git init repo &&
 840         (
 841                 cd repo &&
 842
 843                 test_must_fail test-tool ref-store main reflog-exists refs/heads/branch &&
 844                 test-tool ref-store main create-reflog refs/heads/branch &&
 845                 test-tool ref-store main reflog-exists refs/heads/branch &&
 846                 test-tool ref-store main for-each-reflog-ent-reverse refs/heads/branch >actual &&
 847                 test_must_be_empty actual
 848         )
 849 '
 850
 851 test_expect_success 'reflog: expiry empties reflog' '
 852         test_when_finished "rm -rf repo" &&
 853         git init repo &&
 854         (
 855                 cd repo &&
 856
 857                 test_commit initial &&
 858                 git checkout -b branch &&
 859                 test_commit fileA &&
 860                 test_commit fileB &&
 861
 862                 cat >expect <<-EOF &&
 863                 commit: fileB
 864                 commit: fileA
 865                 branch: Created from HEAD
 866                 EOF
 867                 git reflog show --format="%gs" refs/heads/branch >actual &&
 868                 test_cmp expect actual &&
 869
 870                 git reflog expire branch --expire=all &&
 871                 git reflog show --format="%gs" refs/heads/branch >actual &&
 872                 test_must_be_empty actual &&
 873                 test-tool ref-store main reflog-exists refs/heads/branch
 874         )
 875 '
 876
 877 test_expect_success 'reflog: can be deleted' '
 878         test_when_finished "rm -rf repo" &&
 879         git init repo &&
 880         (
 881                 cd repo &&
 882                 test_commit initial &&
 883                 test-tool ref-store main reflog-exists refs/heads/main &&
 884                 test-tool ref-store main delete-reflog refs/heads/main &&
 885                 test_must_fail test-tool ref-store main reflog-exists refs/heads/main
 886         )
 887 '
 888
 889 test_expect_success 'reflog: garbage collection deletes reflog entries' '
 890         test_when_finished "rm -rf repo" &&
 891         git init repo &&
 892         (
 893                 cd repo &&
 894
 895                 for count in $(test_seq 1 10)
 896                 do
 897                         test_commit "number $count" file.t $count number-$count ||
 898                         return 1
 899                 done &&
 900                 git reflog refs/heads/main >actual &&
 901                 test_line_count = 10 actual &&
 902                 grep "commit (initial): number 1" actual &&
 903                 grep "commit: number 10" actual &&
 904
 905                 git gc &&
 906                 git reflog refs/heads/main >actual &&
 907                 test_line_count = 0 actual
 908         )
 909 '
 910
 911 test_expect_success 'reflog: updates via HEAD update HEAD reflog' '
 912         test_when_finished "rm -rf repo" &&
 913         git init repo &&
 914         (
 915                 cd repo &&
 916                 test_commit main-one &&
 917                 git checkout -b new-branch &&
 918                 test_commit new-one &&
 919                 test_commit new-two &&
 920
 921                 echo new-one >expect &&
 922                 git log -1 --format=%s HEAD@{1} >actual &&
 923                 test_cmp expect actual
 924         )
 925 '
 926
 927 test_expect_success 'branch: copying branch with D/F conflict' '
 928         test_when_finished "rm -rf repo" &&
 929         git init repo &&
 930         (
 931                 cd repo &&
 932                 test_commit A &&
 933                 git branch branch &&
 934                 cat >expect <<-EOF &&
 935                 error: ${SQ}refs/heads/branch${SQ} exists; cannot create ${SQ}refs/heads/branch/moved${SQ}
 936                 fatal: branch copy failed
 937                 EOF
 938                 test_must_fail git branch -c branch branch/moved 2>err &&
 939                 test_cmp expect err
 940         )
 941 '
 942
 943 test_expect_success 'branch: moving branch with D/F conflict' '
 944         test_when_finished "rm -rf repo" &&
 945         git init repo &&
 946         (
 947                 cd repo &&
 948                 test_commit A &&
 949                 git branch branch &&
 950                 git branch conflict &&
 951                 cat >expect <<-EOF &&
 952                 error: ${SQ}refs/heads/conflict${SQ} exists; cannot create ${SQ}refs/heads/conflict/moved${SQ}
 953                 fatal: branch rename failed
 954                 EOF
 955                 test_must_fail git branch -m branch conflict/moved 2>err &&
 956                 test_cmp expect err
 957         )
 958 '
 959
 960 test_expect_success 'worktree: adding worktree creates separate stack' '
 961         test_when_finished "rm -rf repo worktree" &&
 962         git init repo &&
 963         test_commit -C repo A &&
 964
 965         git -C repo worktree add ../worktree &&
 966         test_path_is_file repo/.git/worktrees/worktree/refs/heads &&
 967         echo "ref: refs/heads/.invalid" >expect &&
 968         test_cmp expect repo/.git/worktrees/worktree/HEAD &&
 969         test_path_is_dir repo/.git/worktrees/worktree/reftable &&
 970         test_path_is_file repo/.git/worktrees/worktree/reftable/tables.list
 971 '
 972
 973 test_expect_success 'worktree: pack-refs in main repo packs main refs' '
 974         test_when_finished "rm -rf repo worktree" &&
 975         git init repo &&
 976         test_commit -C repo A &&
 977
 978         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 979         git -C repo worktree add ../worktree &&
 980         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 981         git -C worktree update-ref refs/worktree/per-worktree HEAD &&
 982
 983         test_line_count = 4 repo/.git/worktrees/worktree/reftable/tables.list &&
 984         test_line_count = 3 repo/.git/reftable/tables.list &&
 985         git -C repo pack-refs &&
 986         test_line_count = 4 repo/.git/worktrees/worktree/reftable/tables.list &&
 987         test_line_count = 1 repo/.git/reftable/tables.list
 988 '
 989
 990 test_expect_success 'worktree: pack-refs in worktree packs worktree refs' '
 991         test_when_finished "rm -rf repo worktree" &&
 992         git init repo &&
 993         test_commit -C repo A &&
 994
 995         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 996         git -C repo worktree add ../worktree &&
 997         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 998         git -C worktree update-ref refs/worktree/per-worktree HEAD &&
 999
1000         test_line_count = 4 repo/.git/worktrees/worktree/reftable/tables.list &&
1001         test_line_count = 3 repo/.git/reftable/tables.list &&
1002         git -C worktree pack-refs &&
1003         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
1004         test_line_count = 3 repo/.git/reftable/tables.list
1005 '
1006
1007 test_expect_success 'worktree: creating shared ref updates main stack' '
1008         test_when_finished "rm -rf repo worktree" &&
1009         git init repo &&
1010         test_commit -C repo A &&
1011
1012         git -C repo worktree add ../worktree &&
1013         git -C repo pack-refs &&
1014         git -C worktree pack-refs &&
1015         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
1016         test_line_count = 1 repo/.git/reftable/tables.list &&
1017
1018         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
1019         git -C worktree update-ref refs/heads/shared HEAD &&
1020         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
1021         test_line_count = 2 repo/.git/reftable/tables.list
1022 '
1023
1024 test_expect_success 'worktree: creating per-worktree ref updates worktree stack' '
1025         test_when_finished "rm -rf repo worktree" &&
1026         git init repo &&
1027         test_commit -C repo A &&
1028
1029         git -C repo worktree add ../worktree &&
1030         git -C repo pack-refs &&
1031         git -C worktree pack-refs &&
1032         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
1033         test_line_count = 1 repo/.git/reftable/tables.list &&
1034
1035         git -C worktree update-ref refs/bisect/per-worktree HEAD &&
1036         test_line_count = 2 repo/.git/worktrees/worktree/reftable/tables.list &&
1037         test_line_count = 1 repo/.git/reftable/tables.list
1038 '
1039
1040 test_expect_success 'worktree: creating per-worktree ref from main repo' '
1041         test_when_finished "rm -rf repo worktree" &&
1042         git init repo &&
1043         test_commit -C repo A &&
1044
1045         git -C repo worktree add ../worktree &&
1046         git -C repo pack-refs &&
1047         git -C worktree pack-refs &&
1048         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
1049         test_line_count = 1 repo/.git/reftable/tables.list &&
1050
1051         git -C repo update-ref worktrees/worktree/refs/bisect/per-worktree HEAD &&
1052         test_line_count = 2 repo/.git/worktrees/worktree/reftable/tables.list &&
1053         test_line_count = 1 repo/.git/reftable/tables.list
1054 '
1055
1056 test_expect_success 'worktree: creating per-worktree ref from second worktree' '
1057         test_when_finished "rm -rf repo wt1 wt2" &&
1058         git init repo &&
1059         test_commit -C repo A &&
1060
1061         git -C repo worktree add ../wt1 &&
1062         git -C repo worktree add ../wt2 &&
1063         git -C repo pack-refs &&
1064         git -C wt1 pack-refs &&
1065         git -C wt2 pack-refs &&
1066         test_line_count = 1 repo/.git/worktrees/wt1/reftable/tables.list &&
1067         test_line_count = 1 repo/.git/worktrees/wt2/reftable/tables.list &&
1068         test_line_count = 1 repo/.git/reftable/tables.list &&
1069
1070         git -C wt1 update-ref worktrees/wt2/refs/bisect/per-worktree HEAD &&
1071         test_line_count = 1 repo/.git/worktrees/wt1/reftable/tables.list &&
1072         test_line_count = 2 repo/.git/worktrees/wt2/reftable/tables.list &&
1073         test_line_count = 1 repo/.git/reftable/tables.list
1074 '
1075
1076 test_expect_success 'worktree: can create shared and per-worktree ref in one transaction' '
1077         test_when_finished "rm -rf repo worktree" &&
1078         git init repo &&
1079         test_commit -C repo A &&
1080
1081         git -C repo worktree add ../worktree &&
1082         git -C repo pack-refs &&
1083         git -C worktree pack-refs &&
1084         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
1085         test_line_count = 1 repo/.git/reftable/tables.list &&
1086
1087         cat >stdin <<-EOF &&
1088         create worktrees/worktree/refs/bisect/per-worktree HEAD
1089         create refs/branches/shared HEAD
1090         EOF
1091         git -C repo update-ref --stdin <stdin &&
1092         test_line_count = 2 repo/.git/worktrees/worktree/reftable/tables.list &&
1093         test_line_count = 2 repo/.git/reftable/tables.list
1094 '
1095
1096 test_expect_success 'worktree: can access common refs' '
1097         test_when_finished "rm -rf repo worktree" &&
1098         git init repo &&
1099         test_commit -C repo file1 &&
1100         git -C repo branch branch1 &&
1101         git -C repo worktree add ../worktree &&
1102
1103         echo refs/heads/worktree >expect &&
1104         git -C worktree symbolic-ref HEAD >actual &&
1105         test_cmp expect actual &&
1106         git -C worktree checkout branch1
1107 '
1108
1109 test_expect_success 'worktree: adds worktree with detached HEAD' '
1110         test_when_finished "rm -rf repo worktree" &&
1111
1112         git init repo &&
1113         test_commit -C repo A &&
1114         git -C repo rev-parse main >expect &&
1115
1116         git -C repo worktree add --detach ../worktree main &&
1117         git -C worktree rev-parse HEAD >actual &&
1118         test_cmp expect actual
1119 '
1120
1121 test_expect_success 'fetch: accessing FETCH_HEAD special ref works' '
1122         test_when_finished "rm -rf repo sub" &&
1123
1124         git init sub &&
1125         test_commit -C sub two &&
1126         git -C sub rev-parse HEAD >expect &&
1127
1128         git init repo &&
1129         test_commit -C repo one &&
1130         git -C repo fetch ../sub &&
1131         git -C repo rev-parse FETCH_HEAD >actual &&
1132         test_cmp expect actual
1133 '
1134
1135 test_done