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 "$table.lock" || exit 1
 419                         done ||
 420                         exit 1
 421                 done &&
 422                 test_line_count = 10 .git/reftable/tables.list
 423         )
 424 '
 425
 426 test_expect_success 'pack-refs: compacts tables' '
 427         test_when_finished "rm -rf repo" &&
 428         git init repo &&
 429
 430         test_commit -C repo A &&
 431         ls -1 repo/.git/reftable >table-files &&
 432         test_line_count = 3 table-files &&
 433         test_line_count = 2 repo/.git/reftable/tables.list &&
 434
 435         git -C repo pack-refs &&
 436         ls -1 repo/.git/reftable >table-files &&
 437         test_line_count = 2 table-files &&
 438         test_line_count = 1 repo/.git/reftable/tables.list
 439 '
 440
 441 test_expect_success 'pack-refs: compaction raises locking errors' '
 442         test_when_finished "rm -rf repo" &&
 443         git init repo &&
 444         test_commit -C repo A &&
 445         touch repo/.git/reftable/tables.list.lock &&
 446         cat >expect <<-EOF &&
 447         error: unable to compact stack: data is locked
 448         EOF
 449         test_must_fail git -C repo pack-refs 2>err &&
 450         test_cmp expect err
 451 '
 452
 453 for command in pack-refs gc "maintenance run --task=pack-refs"
 454 do
 455 test_expect_success "$command: auto compaction" '
 456         test_when_finished "rm -rf repo" &&
 457         git init repo &&
 458         (
 459                 cd repo &&
 460
 461                 test_commit A &&
 462
 463                 # We need a bit of setup to ensure that git-gc(1) actually
 464                 # triggers, and that it does not write anything to the refdb.
 465                 git config gc.auto 1 &&
 466                 git config gc.autoDetach 0 &&
 467                 git config gc.reflogExpire never &&
 468                 git config gc.reflogExpireUnreachable never &&
 469                 test_oid blob17_1 | git hash-object -w --stdin &&
 470
 471                 # The tables should have been auto-compacted, and thus auto
 472                 # compaction should not have to do anything.
 473                 ls -1 .git/reftable >tables-expect &&
 474                 test_line_count = 3 tables-expect &&
 475                 git $command --auto &&
 476                 ls -1 .git/reftable >tables-actual &&
 477                 test_cmp tables-expect tables-actual &&
 478
 479                 test_oid blob17_2 | git hash-object -w --stdin &&
 480
 481                 # Lock all tables write some refs. Auto-compaction will be
 482                 # unable to compact tables and thus fails gracefully, leaving
 483                 # the stack in a sub-optimal state.
 484                 ls .git/reftable/*.ref |
 485                 while read table
 486                 do
 487                         touch "$table.lock" || exit 1
 488                 done &&
 489                 git branch B &&
 490                 git branch C &&
 491                 rm .git/reftable/*.lock &&
 492                 test_line_count = 4 .git/reftable/tables.list &&
 493
 494                 git $command --auto &&
 495                 test_line_count = 1 .git/reftable/tables.list
 496         )
 497 '
 498 done
 499
 500 test_expect_success 'pack-refs: prunes stale tables' '
 501         test_when_finished "rm -rf repo" &&
 502         git init repo &&
 503         touch repo/.git/reftable/stale-table.ref &&
 504         git -C repo pack-refs &&
 505         test_path_is_missing repo/.git/reftable/stable-ref.ref
 506 '
 507
 508 test_expect_success 'pack-refs: does not prune non-table files' '
 509         test_when_finished "rm -rf repo" &&
 510         git init repo &&
 511         touch repo/.git/reftable/garbage &&
 512         git -C repo pack-refs &&
 513         test_path_is_file repo/.git/reftable/garbage
 514 '
 515
 516 test_expect_success 'packed-refs: writes are synced' '
 517         test_when_finished "rm -rf repo" &&
 518         git init repo &&
 519         test_commit -C repo initial &&
 520         test_line_count = 2 table-files &&
 521
 522         : >trace2.txt &&
 523         GIT_TRACE2_EVENT="$(pwd)/trace2.txt" \
 524         GIT_TEST_FSYNC=true \
 525                 git -C repo -c core.fsync=reference \
 526                 -c core.fsyncMethod=fsync pack-refs &&
 527         check_fsync_events trace2.txt <<-EOF
 528         "name":"hardware-flush","count":2
 529         EOF
 530 '
 531
 532 test_expect_success 'ref iterator: bogus names are flagged' '
 533         test_when_finished "rm -rf repo" &&
 534         git init repo &&
 535         (
 536                 cd repo &&
 537                 test_commit --no-tag file &&
 538                 test-tool ref-store main update-ref msg "refs/heads/bogus..name" $(git rev-parse HEAD) $ZERO_OID REF_SKIP_REFNAME_VERIFICATION &&
 539
 540                 cat >expect <<-EOF &&
 541                 $ZERO_OID refs/heads/bogus..name 0xc
 542                 $(git rev-parse HEAD) refs/heads/main 0x0
 543                 EOF
 544                 test-tool ref-store main for-each-ref "" >actual &&
 545                 test_cmp expect actual
 546         )
 547 '
 548
 549 test_expect_success 'ref iterator: missing object IDs are not flagged' '
 550         test_when_finished "rm -rf repo" &&
 551         git init repo &&
 552         (
 553                 cd repo &&
 554                 test-tool ref-store main update-ref msg "refs/heads/broken-hash" $INVALID_OID $ZERO_OID REF_SKIP_OID_VERIFICATION &&
 555
 556                 cat >expect <<-EOF &&
 557                 $INVALID_OID refs/heads/broken-hash 0x0
 558                 EOF
 559                 test-tool ref-store main for-each-ref "" >actual &&
 560                 test_cmp expect actual
 561         )
 562 '
 563
 564 test_expect_success 'basic: commit and list refs' '
 565         test_when_finished "rm -rf repo" &&
 566         git init repo &&
 567         test_commit -C repo file &&
 568         test_write_lines refs/heads/main refs/tags/file >expect &&
 569         git -C repo for-each-ref --format="%(refname)" >actual &&
 570         test_cmp actual expect
 571 '
 572
 573 test_expect_success 'basic: can write large commit message' '
 574         test_when_finished "rm -rf repo" &&
 575         git init repo &&
 576         perl -e "
 577                 print \"this is a long commit message\" x 50000
 578         " >commit-msg &&
 579         git -C repo commit --allow-empty --file=../commit-msg
 580 '
 581
 582 test_expect_success 'basic: show-ref fails with empty repository' '
 583         test_when_finished "rm -rf repo" &&
 584         git init repo &&
 585         test_must_fail git -C repo show-ref >actual &&
 586         test_must_be_empty actual
 587 '
 588
 589 test_expect_success 'basic: can check out unborn branch' '
 590         test_when_finished "rm -rf repo" &&
 591         git init repo &&
 592         git -C repo checkout -b main
 593 '
 594
 595 test_expect_success 'basic: peeled tags are stored' '
 596         test_when_finished "rm -rf repo" &&
 597         git init repo &&
 598         test_commit -C repo file &&
 599         git -C repo tag -m "annotated tag" test_tag HEAD &&
 600         for ref in refs/heads/main refs/tags/file refs/tags/test_tag refs/tags/test_tag^{}
 601         do
 602                 echo "$(git -C repo rev-parse "$ref") $ref" || return 1
 603         done >expect &&
 604         git -C repo show-ref -d >actual &&
 605         test_cmp expect actual
 606 '
 607
 608 test_expect_success 'basic: for-each-ref can print symrefs' '
 609         test_when_finished "rm -rf repo" &&
 610         git init repo &&
 611         (
 612                 cd repo &&
 613                 test_commit file &&
 614                 git branch &&
 615                 git symbolic-ref refs/heads/sym refs/heads/main &&
 616                 cat >expected <<-EOF &&
 617                 refs/heads/main
 618                 EOF
 619                 git for-each-ref --format="%(symref)" refs/heads/sym >actual &&
 620                 test_cmp expected actual
 621         )
 622 '
 623
 624 test_expect_success 'basic: notes' '
 625         test_when_finished "rm -rf repo" &&
 626         git init repo &&
 627         (
 628                 write_script fake_editor <<-\EOF &&
 629                 echo "$MSG" >"$1"
 630                 echo "$MSG" >&2
 631                 EOF
 632
 633                 test_commit 1st &&
 634                 test_commit 2nd &&
 635                 GIT_EDITOR=./fake_editor MSG=b4 git notes add &&
 636                 GIT_EDITOR=./fake_editor MSG=b3 git notes edit &&
 637                 echo b4 >expect &&
 638                 git notes --ref commits@{1} show >actual &&
 639                 test_cmp expect actual
 640         )
 641 '
 642
 643 test_expect_success 'basic: stash' '
 644         test_when_finished "rm -rf repo" &&
 645         git init repo &&
 646         (
 647                 cd repo &&
 648                 test_commit file &&
 649                 git stash list >expect &&
 650                 test_line_count = 0 expect &&
 651
 652                 echo hoi >>file.t &&
 653                 git stash push -m stashed &&
 654                 git stash list >expect &&
 655                 test_line_count = 1 expect &&
 656
 657                 git stash clear &&
 658                 git stash list >expect &&
 659                 test_line_count = 0 expect
 660         )
 661 '
 662
 663 test_expect_success 'basic: cherry-pick' '
 664         test_when_finished "rm -rf repo" &&
 665         git init repo &&
 666         (
 667                 cd repo &&
 668                 test_commit message1 file1 &&
 669                 test_commit message2 file2 &&
 670                 git branch source &&
 671                 git checkout HEAD^ &&
 672                 test_commit message3 file3 &&
 673                 git cherry-pick source &&
 674                 test_path_is_file file2
 675         )
 676 '
 677
 678 test_expect_success 'basic: rebase' '
 679         test_when_finished "rm -rf repo" &&
 680         git init repo &&
 681         (
 682                 cd repo &&
 683                 test_commit message1 file1 &&
 684                 test_commit message2 file2 &&
 685                 git branch source &&
 686                 git checkout HEAD^ &&
 687                 test_commit message3 file3 &&
 688                 git rebase source &&
 689                 test_path_is_file file2
 690         )
 691 '
 692
 693 test_expect_success 'reflog: can delete separate reflog entries' '
 694         test_when_finished "rm -rf repo" &&
 695         git init repo &&
 696         (
 697                 cd repo &&
 698
 699                 test_commit file &&
 700                 test_commit file2 &&
 701                 test_commit file3 &&
 702                 test_commit file4 &&
 703                 git reflog >actual &&
 704                 grep file3 actual &&
 705
 706                 git reflog delete HEAD@{1} &&
 707                 git reflog >actual &&
 708                 ! grep file3 actual
 709         )
 710 '
 711
 712 test_expect_success 'reflog: can switch to previous branch' '
 713         test_when_finished "rm -rf repo" &&
 714         git init repo &&
 715         (
 716                 cd repo &&
 717                 test_commit file1 &&
 718                 git checkout -b branch1 &&
 719                 test_commit file2 &&
 720                 git checkout -b branch2 &&
 721                 git switch - &&
 722                 git rev-parse --symbolic-full-name HEAD >actual &&
 723                 echo refs/heads/branch1 >expect &&
 724                 test_cmp actual expect
 725         )
 726 '
 727
 728 test_expect_success 'reflog: copying branch writes reflog entry' '
 729         test_when_finished "rm -rf repo" &&
 730         git init repo &&
 731         (
 732                 cd repo &&
 733                 test_commit file1 &&
 734                 test_commit file2 &&
 735                 oid=$(git rev-parse --short HEAD) &&
 736                 git branch src &&
 737                 cat >expect <<-EOF &&
 738                 ${oid} dst@{0}: Branch: copied refs/heads/src to refs/heads/dst
 739                 ${oid} dst@{1}: branch: Created from main
 740                 EOF
 741                 git branch -c src dst &&
 742                 git reflog dst >actual &&
 743                 test_cmp expect actual
 744         )
 745 '
 746
 747 test_expect_success 'reflog: renaming branch writes reflog entry' '
 748         test_when_finished "rm -rf repo" &&
 749         git init repo &&
 750         (
 751                 cd repo &&
 752                 git symbolic-ref HEAD refs/heads/before &&
 753                 test_commit file &&
 754                 git show-ref >expected.refs &&
 755                 sed s/before/after/g <expected.refs >expected &&
 756                 git branch -M after &&
 757                 git show-ref >actual &&
 758                 test_cmp expected actual &&
 759                 echo refs/heads/after >expected &&
 760                 git symbolic-ref HEAD >actual &&
 761                 test_cmp expected actual
 762         )
 763 '
 764
 765 test_expect_success 'reflog: can store empty logs' '
 766         test_when_finished "rm -rf repo" &&
 767         git init repo &&
 768         (
 769                 cd repo &&
 770
 771                 test_must_fail test-tool ref-store main reflog-exists refs/heads/branch &&
 772                 test-tool ref-store main create-reflog refs/heads/branch &&
 773                 test-tool ref-store main reflog-exists refs/heads/branch &&
 774                 test-tool ref-store main for-each-reflog-ent-reverse refs/heads/branch >actual &&
 775                 test_must_be_empty actual
 776         )
 777 '
 778
 779 test_expect_success 'reflog: expiry empties reflog' '
 780         test_when_finished "rm -rf repo" &&
 781         git init repo &&
 782         (
 783                 cd repo &&
 784
 785                 test_commit initial &&
 786                 git checkout -b branch &&
 787                 test_commit fileA &&
 788                 test_commit fileB &&
 789
 790                 cat >expect <<-EOF &&
 791                 commit: fileB
 792                 commit: fileA
 793                 branch: Created from HEAD
 794                 EOF
 795                 git reflog show --format="%gs" refs/heads/branch >actual &&
 796                 test_cmp expect actual &&
 797
 798                 git reflog expire branch --expire=all &&
 799                 git reflog show --format="%gs" refs/heads/branch >actual &&
 800                 test_must_be_empty actual &&
 801                 test-tool ref-store main reflog-exists refs/heads/branch
 802         )
 803 '
 804
 805 test_expect_success 'reflog: can be deleted' '
 806         test_when_finished "rm -rf repo" &&
 807         git init repo &&
 808         (
 809                 cd repo &&
 810                 test_commit initial &&
 811                 test-tool ref-store main reflog-exists refs/heads/main &&
 812                 test-tool ref-store main delete-reflog refs/heads/main &&
 813                 test_must_fail test-tool ref-store main reflog-exists refs/heads/main
 814         )
 815 '
 816
 817 test_expect_success 'reflog: garbage collection deletes reflog entries' '
 818         test_when_finished "rm -rf repo" &&
 819         git init repo &&
 820         (
 821                 cd repo &&
 822
 823                 for count in $(test_seq 1 10)
 824                 do
 825                         test_commit "number $count" file.t $count number-$count ||
 826                         return 1
 827                 done &&
 828                 git reflog refs/heads/main >actual &&
 829                 test_line_count = 10 actual &&
 830                 grep "commit (initial): number 1" actual &&
 831                 grep "commit: number 10" actual &&
 832
 833                 git gc &&
 834                 git reflog refs/heads/main >actual &&
 835                 test_line_count = 0 actual
 836         )
 837 '
 838
 839 test_expect_success 'reflog: updates via HEAD update HEAD reflog' '
 840         test_when_finished "rm -rf repo" &&
 841         git init repo &&
 842         (
 843                 cd repo &&
 844                 test_commit main-one &&
 845                 git checkout -b new-branch &&
 846                 test_commit new-one &&
 847                 test_commit new-two &&
 848
 849                 echo new-one >expect &&
 850                 git log -1 --format=%s HEAD@{1} >actual &&
 851                 test_cmp expect actual
 852         )
 853 '
 854
 855 test_expect_success 'branch: copying branch with D/F conflict' '
 856         test_when_finished "rm -rf repo" &&
 857         git init repo &&
 858         (
 859                 cd repo &&
 860                 test_commit A &&
 861                 git branch branch &&
 862                 cat >expect <<-EOF &&
 863                 error: ${SQ}refs/heads/branch${SQ} exists; cannot create ${SQ}refs/heads/branch/moved${SQ}
 864                 fatal: branch copy failed
 865                 EOF
 866                 test_must_fail git branch -c branch branch/moved 2>err &&
 867                 test_cmp expect err
 868         )
 869 '
 870
 871 test_expect_success 'branch: moving branch with D/F conflict' '
 872         test_when_finished "rm -rf repo" &&
 873         git init repo &&
 874         (
 875                 cd repo &&
 876                 test_commit A &&
 877                 git branch branch &&
 878                 git branch conflict &&
 879                 cat >expect <<-EOF &&
 880                 error: ${SQ}refs/heads/conflict${SQ} exists; cannot create ${SQ}refs/heads/conflict/moved${SQ}
 881                 fatal: branch rename failed
 882                 EOF
 883                 test_must_fail git branch -m branch conflict/moved 2>err &&
 884                 test_cmp expect err
 885         )
 886 '
 887
 888 test_expect_success 'worktree: adding worktree creates separate stack' '
 889         test_when_finished "rm -rf repo worktree" &&
 890         git init repo &&
 891         test_commit -C repo A &&
 892
 893         git -C repo worktree add ../worktree &&
 894         test_path_is_file repo/.git/worktrees/worktree/refs/heads &&
 895         echo "ref: refs/heads/.invalid" >expect &&
 896         test_cmp expect repo/.git/worktrees/worktree/HEAD &&
 897         test_path_is_dir repo/.git/worktrees/worktree/reftable &&
 898         test_path_is_file repo/.git/worktrees/worktree/reftable/tables.list
 899 '
 900
 901 test_expect_success 'worktree: pack-refs in main repo packs main refs' '
 902         test_when_finished "rm -rf repo worktree" &&
 903         git init repo &&
 904         test_commit -C repo A &&
 905
 906         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 907         git -C repo worktree add ../worktree &&
 908         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 909         git -C worktree update-ref refs/worktree/per-worktree HEAD &&
 910
 911         test_line_count = 4 repo/.git/worktrees/worktree/reftable/tables.list &&
 912         test_line_count = 3 repo/.git/reftable/tables.list &&
 913         git -C repo pack-refs &&
 914         test_line_count = 4 repo/.git/worktrees/worktree/reftable/tables.list &&
 915         test_line_count = 1 repo/.git/reftable/tables.list
 916 '
 917
 918 test_expect_success 'worktree: pack-refs in worktree packs worktree refs' '
 919         test_when_finished "rm -rf repo worktree" &&
 920         git init repo &&
 921         test_commit -C repo A &&
 922
 923         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 924         git -C repo worktree add ../worktree &&
 925         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 926         git -C worktree update-ref refs/worktree/per-worktree HEAD &&
 927
 928         test_line_count = 4 repo/.git/worktrees/worktree/reftable/tables.list &&
 929         test_line_count = 3 repo/.git/reftable/tables.list &&
 930         git -C worktree pack-refs &&
 931         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
 932         test_line_count = 3 repo/.git/reftable/tables.list
 933 '
 934
 935 test_expect_success 'worktree: creating shared ref updates main stack' '
 936         test_when_finished "rm -rf repo worktree" &&
 937         git init repo &&
 938         test_commit -C repo A &&
 939
 940         git -C repo worktree add ../worktree &&
 941         git -C repo pack-refs &&
 942         git -C worktree pack-refs &&
 943         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
 944         test_line_count = 1 repo/.git/reftable/tables.list &&
 945
 946         GIT_TEST_REFTABLE_AUTOCOMPACTION=false \
 947         git -C worktree update-ref refs/heads/shared HEAD &&
 948         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
 949         test_line_count = 2 repo/.git/reftable/tables.list
 950 '
 951
 952 test_expect_success 'worktree: creating per-worktree ref updates worktree stack' '
 953         test_when_finished "rm -rf repo worktree" &&
 954         git init repo &&
 955         test_commit -C repo A &&
 956
 957         git -C repo worktree add ../worktree &&
 958         git -C repo pack-refs &&
 959         git -C worktree pack-refs &&
 960         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
 961         test_line_count = 1 repo/.git/reftable/tables.list &&
 962
 963         git -C worktree update-ref refs/bisect/per-worktree HEAD &&
 964         test_line_count = 2 repo/.git/worktrees/worktree/reftable/tables.list &&
 965         test_line_count = 1 repo/.git/reftable/tables.list
 966 '
 967
 968 test_expect_success 'worktree: creating per-worktree ref from main repo' '
 969         test_when_finished "rm -rf repo worktree" &&
 970         git init repo &&
 971         test_commit -C repo A &&
 972
 973         git -C repo worktree add ../worktree &&
 974         git -C repo pack-refs &&
 975         git -C worktree pack-refs &&
 976         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
 977         test_line_count = 1 repo/.git/reftable/tables.list &&
 978
 979         git -C repo update-ref worktrees/worktree/refs/bisect/per-worktree HEAD &&
 980         test_line_count = 2 repo/.git/worktrees/worktree/reftable/tables.list &&
 981         test_line_count = 1 repo/.git/reftable/tables.list
 982 '
 983
 984 test_expect_success 'worktree: creating per-worktree ref from second worktree' '
 985         test_when_finished "rm -rf repo wt1 wt2" &&
 986         git init repo &&
 987         test_commit -C repo A &&
 988
 989         git -C repo worktree add ../wt1 &&
 990         git -C repo worktree add ../wt2 &&
 991         git -C repo pack-refs &&
 992         git -C wt1 pack-refs &&
 993         git -C wt2 pack-refs &&
 994         test_line_count = 1 repo/.git/worktrees/wt1/reftable/tables.list &&
 995         test_line_count = 1 repo/.git/worktrees/wt2/reftable/tables.list &&
 996         test_line_count = 1 repo/.git/reftable/tables.list &&
 997
 998         git -C wt1 update-ref worktrees/wt2/refs/bisect/per-worktree HEAD &&
 999         test_line_count = 1 repo/.git/worktrees/wt1/reftable/tables.list &&
1000         test_line_count = 2 repo/.git/worktrees/wt2/reftable/tables.list &&
1001         test_line_count = 1 repo/.git/reftable/tables.list
1002 '
1003
1004 test_expect_success 'worktree: can create shared and per-worktree ref in one transaction' '
1005         test_when_finished "rm -rf repo worktree" &&
1006         git init repo &&
1007         test_commit -C repo A &&
1008
1009         git -C repo worktree add ../worktree &&
1010         git -C repo pack-refs &&
1011         git -C worktree pack-refs &&
1012         test_line_count = 1 repo/.git/worktrees/worktree/reftable/tables.list &&
1013         test_line_count = 1 repo/.git/reftable/tables.list &&
1014
1015         cat >stdin <<-EOF &&
1016         create worktrees/worktree/refs/bisect/per-worktree HEAD
1017         create refs/branches/shared HEAD
1018         EOF
1019         git -C repo update-ref --stdin <stdin &&
1020         test_line_count = 2 repo/.git/worktrees/worktree/reftable/tables.list &&
1021         test_line_count = 2 repo/.git/reftable/tables.list
1022 '
1023
1024 test_expect_success 'worktree: can access common refs' '
1025         test_when_finished "rm -rf repo worktree" &&
1026         git init repo &&
1027         test_commit -C repo file1 &&
1028         git -C repo branch branch1 &&
1029         git -C repo worktree add ../worktree &&
1030
1031         echo refs/heads/worktree >expect &&
1032         git -C worktree symbolic-ref HEAD >actual &&
1033         test_cmp expect actual &&
1034         git -C worktree checkout branch1
1035 '
1036
1037 test_expect_success 'worktree: adds worktree with detached HEAD' '
1038         test_when_finished "rm -rf repo worktree" &&
1039
1040         git init repo &&
1041         test_commit -C repo A &&
1042         git -C repo rev-parse main >expect &&
1043
1044         git -C repo worktree add --detach ../worktree main &&
1045         git -C worktree rev-parse HEAD >actual &&
1046         test_cmp expect actual
1047 '
1048
1049 test_expect_success 'fetch: accessing FETCH_HEAD special ref works' '
1050         test_when_finished "rm -rf repo sub" &&
1051
1052         git init sub &&
1053         test_commit -C sub two &&
1054         git -C sub rev-parse HEAD >expect &&
1055
1056         git init repo &&
1057         test_commit -C repo one &&
1058         git -C repo fetch ../sub &&
1059         git -C repo rev-parse FETCH_HEAD >actual &&
1060         test_cmp expect actual
1061 '
1062
1063 test_done