t/t5526-fetch-submodules.sh

   1 #!/bin/sh
   2 # Copyright (c) 2010, Jens Lehmann
   3
   4 test_description='Recursive "git fetch" for submodules'
   5
   6 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
   7 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
   8
   9 . ./test-lib.sh
  10
  11 pwd=$(pwd)
  12
  13 add_upstream_commit() {
  14         (
  15                 cd submodule &&
  16                 head1=$(git rev-parse --short HEAD) &&
  17                 echo new >> subfile &&
  18                 test_tick &&
  19                 git add subfile &&
  20                 git commit -m new subfile &&
  21                 head2=$(git rev-parse --short HEAD) &&
  22                 echo "Fetching submodule submodule" > ../expect.err &&
  23                 echo "From $pwd/submodule" >> ../expect.err &&
  24                 echo "   $head1..$head2  sub        -> origin/sub" >> ../expect.err
  25         ) &&
  26         (
  27                 cd deepsubmodule &&
  28                 head1=$(git rev-parse --short HEAD) &&
  29                 echo new >> deepsubfile &&
  30                 test_tick &&
  31                 git add deepsubfile &&
  32                 git commit -m new deepsubfile &&
  33                 head2=$(git rev-parse --short HEAD) &&
  34                 echo "Fetching submodule submodule/subdir/deepsubmodule" >> ../expect.err
  35                 echo "From $pwd/deepsubmodule" >> ../expect.err &&
  36                 echo "   $head1..$head2  deep       -> origin/deep" >> ../expect.err
  37         )
  38 }
  39
  40 test_expect_success setup '
  41         mkdir deepsubmodule &&
  42         (
  43                 cd deepsubmodule &&
  44                 git init &&
  45                 echo deepsubcontent > deepsubfile &&
  46                 git add deepsubfile &&
  47                 git commit -m new deepsubfile &&
  48                 git branch -M deep
  49         ) &&
  50         mkdir submodule &&
  51         (
  52                 cd submodule &&
  53                 git init &&
  54                 echo subcontent > subfile &&
  55                 git add subfile &&
  56                 git submodule add "$pwd/deepsubmodule" subdir/deepsubmodule &&
  57                 git commit -a -m new &&
  58                 git branch -M sub
  59         ) &&
  60         git submodule add "$pwd/submodule" submodule &&
  61         git commit -am initial &&
  62         git branch -M super &&
  63         git clone . downstream &&
  64         (
  65                 cd downstream &&
  66                 git submodule update --init --recursive
  67         )
  68 '
  69
  70 test_expect_success "fetch --recurse-submodules recurses into submodules" '
  71         add_upstream_commit &&
  72         (
  73                 cd downstream &&
  74                 git fetch --recurse-submodules >../actual.out 2>../actual.err
  75         ) &&
  76         test_must_be_empty actual.out &&
  77         test_i18ncmp expect.err actual.err
  78 '
  79
  80 test_expect_success "submodule.recurse option triggers recursive fetch" '
  81         add_upstream_commit &&
  82         (
  83                 cd downstream &&
  84                 git -c submodule.recurse fetch >../actual.out 2>../actual.err
  85         ) &&
  86         test_must_be_empty actual.out &&
  87         test_i18ncmp expect.err actual.err
  88 '
  89
  90 test_expect_success "fetch --recurse-submodules -j2 has the same output behaviour" '
  91         add_upstream_commit &&
  92         (
  93                 cd downstream &&
  94                 GIT_TRACE="$TRASH_DIRECTORY/trace.out" git fetch --recurse-submodules -j2 2>../actual.err
  95         ) &&
  96         test_must_be_empty actual.out &&
  97         test_i18ncmp expect.err actual.err &&
  98         grep "2 tasks" trace.out
  99 '
 100
 101 test_expect_success "fetch alone only fetches superproject" '
 102         add_upstream_commit &&
 103         (
 104                 cd downstream &&
 105                 git fetch >../actual.out 2>../actual.err
 106         ) &&
 107         test_must_be_empty actual.out &&
 108         test_must_be_empty actual.err
 109 '
 110
 111 test_expect_success "fetch --no-recurse-submodules only fetches superproject" '
 112         (
 113                 cd downstream &&
 114                 git fetch --no-recurse-submodules >../actual.out 2>../actual.err
 115         ) &&
 116         test_must_be_empty actual.out &&
 117         test_must_be_empty actual.err
 118 '
 119
 120 test_expect_success "using fetchRecurseSubmodules=true in .gitmodules recurses into submodules" '
 121         (
 122                 cd downstream &&
 123                 git config -f .gitmodules submodule.submodule.fetchRecurseSubmodules true &&
 124                 git fetch >../actual.out 2>../actual.err
 125         ) &&
 126         test_must_be_empty actual.out &&
 127         test_i18ncmp expect.err actual.err
 128 '
 129
 130 test_expect_success "--no-recurse-submodules overrides .gitmodules config" '
 131         add_upstream_commit &&
 132         (
 133                 cd downstream &&
 134                 git fetch --no-recurse-submodules >../actual.out 2>../actual.err
 135         ) &&
 136         test_must_be_empty actual.out &&
 137         test_must_be_empty actual.err
 138 '
 139
 140 test_expect_success "using fetchRecurseSubmodules=false in .git/config overrides setting in .gitmodules" '
 141         (
 142                 cd downstream &&
 143                 git config submodule.submodule.fetchRecurseSubmodules false &&
 144                 git fetch >../actual.out 2>../actual.err
 145         ) &&
 146         test_must_be_empty actual.out &&
 147         test_must_be_empty actual.err
 148 '
 149
 150 test_expect_success "--recurse-submodules overrides fetchRecurseSubmodules setting from .git/config" '
 151         (
 152                 cd downstream &&
 153                 git fetch --recurse-submodules >../actual.out 2>../actual.err &&
 154                 git config --unset -f .gitmodules submodule.submodule.fetchRecurseSubmodules &&
 155                 git config --unset submodule.submodule.fetchRecurseSubmodules
 156         ) &&
 157         test_must_be_empty actual.out &&
 158         test_i18ncmp expect.err actual.err
 159 '
 160
 161 test_expect_success "--quiet propagates to submodules" '
 162         (
 163                 cd downstream &&
 164                 git fetch --recurse-submodules --quiet >../actual.out 2>../actual.err
 165         ) &&
 166         test_must_be_empty actual.out &&
 167         test_must_be_empty actual.err
 168 '
 169
 170 test_expect_success "--quiet propagates to parallel submodules" '
 171         (
 172                 cd downstream &&
 173                 git fetch --recurse-submodules -j 2 --quiet  >../actual.out 2>../actual.err
 174         ) &&
 175         test_must_be_empty actual.out &&
 176         test_must_be_empty actual.err
 177 '
 178
 179 test_expect_success "--dry-run propagates to submodules" '
 180         add_upstream_commit &&
 181         (
 182                 cd downstream &&
 183                 git fetch --recurse-submodules --dry-run >../actual.out 2>../actual.err
 184         ) &&
 185         test_must_be_empty actual.out &&
 186         test_i18ncmp expect.err actual.err
 187 '
 188
 189 test_expect_success "Without --dry-run propagates to submodules" '
 190         (
 191                 cd downstream &&
 192                 git fetch --recurse-submodules >../actual.out 2>../actual.err
 193         ) &&
 194         test_must_be_empty actual.out &&
 195         test_i18ncmp expect.err actual.err
 196 '
 197
 198 test_expect_success "recurseSubmodules=true propagates into submodules" '
 199         add_upstream_commit &&
 200         (
 201                 cd downstream &&
 202                 git config fetch.recurseSubmodules true &&
 203                 git fetch >../actual.out 2>../actual.err
 204         ) &&
 205         test_must_be_empty actual.out &&
 206         test_i18ncmp expect.err actual.err
 207 '
 208
 209 test_expect_success "--recurse-submodules overrides config in submodule" '
 210         add_upstream_commit &&
 211         (
 212                 cd downstream &&
 213                 (
 214                         cd submodule &&
 215                         git config fetch.recurseSubmodules false
 216                 ) &&
 217                 git fetch --recurse-submodules >../actual.out 2>../actual.err
 218         ) &&
 219         test_must_be_empty actual.out &&
 220         test_i18ncmp expect.err actual.err
 221 '
 222
 223 test_expect_success "--no-recurse-submodules overrides config setting" '
 224         add_upstream_commit &&
 225         (
 226                 cd downstream &&
 227                 git config fetch.recurseSubmodules true &&
 228                 git fetch --no-recurse-submodules >../actual.out 2>../actual.err
 229         ) &&
 230         test_must_be_empty actual.out &&
 231         test_must_be_empty actual.err
 232 '
 233
 234 test_expect_success "Recursion doesn't happen when no new commits are fetched in the superproject" '
 235         (
 236                 cd downstream &&
 237                 (
 238                         cd submodule &&
 239                         git config --unset fetch.recurseSubmodules
 240                 ) &&
 241                 git config --unset fetch.recurseSubmodules &&
 242                 git fetch >../actual.out 2>../actual.err
 243         ) &&
 244         test_must_be_empty actual.out &&
 245         test_must_be_empty actual.err
 246 '
 247
 248 test_expect_success "Recursion stops when no new submodule commits are fetched" '
 249         head1=$(git rev-parse --short HEAD) &&
 250         git add submodule &&
 251         git commit -m "new submodule" &&
 252         head2=$(git rev-parse --short HEAD) &&
 253         echo "From $pwd/." > expect.err.sub &&
 254         echo "   $head1..$head2  super      -> origin/super" >>expect.err.sub &&
 255         head -3 expect.err >> expect.err.sub &&
 256         (
 257                 cd downstream &&
 258                 git fetch >../actual.out 2>../actual.err
 259         ) &&
 260         test_i18ncmp expect.err.sub actual.err &&
 261         test_must_be_empty actual.out
 262 '
 263
 264 test_expect_success "Recursion doesn't happen when new superproject commits don't change any submodules" '
 265         add_upstream_commit &&
 266         head1=$(git rev-parse --short HEAD) &&
 267         echo a > file &&
 268         git add file &&
 269         git commit -m "new file" &&
 270         head2=$(git rev-parse --short HEAD) &&
 271         echo "From $pwd/." > expect.err.file &&
 272         echo "   $head1..$head2  super      -> origin/super" >> expect.err.file &&
 273         (
 274                 cd downstream &&
 275                 git fetch >../actual.out 2>../actual.err
 276         ) &&
 277         test_must_be_empty actual.out &&
 278         test_i18ncmp expect.err.file actual.err
 279 '
 280
 281 test_expect_success "Recursion picks up config in submodule" '
 282         (
 283                 cd downstream &&
 284                 git fetch --recurse-submodules &&
 285                 (
 286                         cd submodule &&
 287                         git config fetch.recurseSubmodules true
 288                 )
 289         ) &&
 290         add_upstream_commit &&
 291         head1=$(git rev-parse --short HEAD) &&
 292         git add submodule &&
 293         git commit -m "new submodule" &&
 294         head2=$(git rev-parse --short HEAD) &&
 295         echo "From $pwd/." > expect.err.sub &&
 296         echo "   $head1..$head2  super      -> origin/super" >> expect.err.sub &&
 297         cat expect.err >> expect.err.sub &&
 298         (
 299                 cd downstream &&
 300                 git fetch >../actual.out 2>../actual.err &&
 301                 (
 302                         cd submodule &&
 303                         git config --unset fetch.recurseSubmodules
 304                 )
 305         ) &&
 306         test_i18ncmp expect.err.sub actual.err &&
 307         test_must_be_empty actual.out
 308 '
 309
 310 test_expect_success "Recursion picks up all submodules when necessary" '
 311         add_upstream_commit &&
 312         (
 313                 cd submodule &&
 314                 (
 315                         cd subdir/deepsubmodule &&
 316                         git fetch &&
 317                         git checkout -q FETCH_HEAD
 318                 ) &&
 319                 head1=$(git rev-parse --short HEAD^) &&
 320                 git add subdir/deepsubmodule &&
 321                 git commit -m "new deepsubmodule" &&
 322                 head2=$(git rev-parse --short HEAD) &&
 323                 echo "Fetching submodule submodule" > ../expect.err.sub &&
 324                 echo "From $pwd/submodule" >> ../expect.err.sub &&
 325                 echo "   $head1..$head2  sub        -> origin/sub" >> ../expect.err.sub
 326         ) &&
 327         head1=$(git rev-parse --short HEAD) &&
 328         git add submodule &&
 329         git commit -m "new submodule" &&
 330         head2=$(git rev-parse --short HEAD) &&
 331         echo "From $pwd/." > expect.err.2 &&
 332         echo "   $head1..$head2  super      -> origin/super" >> expect.err.2 &&
 333         cat expect.err.sub >> expect.err.2 &&
 334         tail -3 expect.err >> expect.err.2 &&
 335         (
 336                 cd downstream &&
 337                 git fetch >../actual.out 2>../actual.err
 338         ) &&
 339         test_i18ncmp expect.err.2 actual.err &&
 340         test_must_be_empty actual.out
 341 '
 342
 343 test_expect_success "'--recurse-submodules=on-demand' doesn't recurse when no new commits are fetched in the superproject (and ignores config)" '
 344         add_upstream_commit &&
 345         (
 346                 cd submodule &&
 347                 (
 348                         cd subdir/deepsubmodule &&
 349                         git fetch &&
 350                         git checkout -q FETCH_HEAD
 351                 ) &&
 352                 head1=$(git rev-parse --short HEAD^) &&
 353                 git add subdir/deepsubmodule &&
 354                 git commit -m "new deepsubmodule" &&
 355                 head2=$(git rev-parse --short HEAD) &&
 356                 echo Fetching submodule submodule > ../expect.err.sub &&
 357                 echo "From $pwd/submodule" >> ../expect.err.sub &&
 358                 echo "   $head1..$head2  sub        -> origin/sub" >> ../expect.err.sub
 359         ) &&
 360         (
 361                 cd downstream &&
 362                 git config fetch.recurseSubmodules true &&
 363                 git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err &&
 364                 git config --unset fetch.recurseSubmodules
 365         ) &&
 366         test_must_be_empty actual.out &&
 367         test_must_be_empty actual.err
 368 '
 369
 370 test_expect_success "'--recurse-submodules=on-demand' recurses as deep as necessary (and ignores config)" '
 371         head1=$(git rev-parse --short HEAD) &&
 372         git add submodule &&
 373         git commit -m "new submodule" &&
 374         head2=$(git rev-parse --short HEAD) &&
 375         tail -3 expect.err > expect.err.deepsub &&
 376         echo "From $pwd/." > expect.err &&
 377         echo "   $head1..$head2  super      -> origin/super" >>expect.err &&
 378         cat expect.err.sub >> expect.err &&
 379         cat expect.err.deepsub >> expect.err &&
 380         (
 381                 cd downstream &&
 382                 git config fetch.recurseSubmodules false &&
 383                 (
 384                         cd submodule &&
 385                         git config -f .gitmodules submodule.subdir/deepsubmodule.fetchRecursive false
 386                 ) &&
 387                 git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err &&
 388                 git config --unset fetch.recurseSubmodules &&
 389                 (
 390                         cd submodule &&
 391                         git config --unset -f .gitmodules submodule.subdir/deepsubmodule.fetchRecursive
 392                 )
 393         ) &&
 394         test_must_be_empty actual.out &&
 395         test_i18ncmp expect.err actual.err
 396 '
 397
 398 test_expect_success "'--recurse-submodules=on-demand' stops when no new submodule commits are found in the superproject (and ignores config)" '
 399         add_upstream_commit &&
 400         head1=$(git rev-parse --short HEAD) &&
 401         echo a >> file &&
 402         git add file &&
 403         git commit -m "new file" &&
 404         head2=$(git rev-parse --short HEAD) &&
 405         echo "From $pwd/." > expect.err.file &&
 406         echo "   $head1..$head2  super      -> origin/super" >> expect.err.file &&
 407         (
 408                 cd downstream &&
 409                 git fetch --recurse-submodules=on-demand >../actual.out 2>../actual.err
 410         ) &&
 411         test_must_be_empty actual.out &&
 412         test_i18ncmp expect.err.file actual.err
 413 '
 414
 415 test_expect_success "'fetch.recurseSubmodules=on-demand' overrides global config" '
 416         (
 417                 cd downstream &&
 418                 git fetch --recurse-submodules
 419         ) &&
 420         add_upstream_commit &&
 421         git config --global fetch.recurseSubmodules false &&
 422         head1=$(git rev-parse --short HEAD) &&
 423         git add submodule &&
 424         git commit -m "new submodule" &&
 425         head2=$(git rev-parse --short HEAD) &&
 426         echo "From $pwd/." > expect.err.2 &&
 427         echo "   $head1..$head2  super      -> origin/super" >>expect.err.2 &&
 428         head -3 expect.err >> expect.err.2 &&
 429         (
 430                 cd downstream &&
 431                 git config fetch.recurseSubmodules on-demand &&
 432                 git fetch >../actual.out 2>../actual.err
 433         ) &&
 434         git config --global --unset fetch.recurseSubmodules &&
 435         (
 436                 cd downstream &&
 437                 git config --unset fetch.recurseSubmodules
 438         ) &&
 439         test_must_be_empty actual.out &&
 440         test_i18ncmp expect.err.2 actual.err
 441 '
 442
 443 test_expect_success "'submodule.<sub>.fetchRecurseSubmodules=on-demand' overrides fetch.recurseSubmodules" '
 444         (
 445                 cd downstream &&
 446                 git fetch --recurse-submodules
 447         ) &&
 448         add_upstream_commit &&
 449         git config fetch.recurseSubmodules false &&
 450         head1=$(git rev-parse --short HEAD) &&
 451         git add submodule &&
 452         git commit -m "new submodule" &&
 453         head2=$(git rev-parse --short HEAD) &&
 454         echo "From $pwd/." > expect.err.2 &&
 455         echo "   $head1..$head2  super      -> origin/super" >>expect.err.2 &&
 456         head -3 expect.err >> expect.err.2 &&
 457         (
 458                 cd downstream &&
 459                 git config submodule.submodule.fetchRecurseSubmodules on-demand &&
 460                 git fetch >../actual.out 2>../actual.err
 461         ) &&
 462         git config --unset fetch.recurseSubmodules &&
 463         (
 464                 cd downstream &&
 465                 git config --unset submodule.submodule.fetchRecurseSubmodules
 466         ) &&
 467         test_must_be_empty actual.out &&
 468         test_i18ncmp expect.err.2 actual.err
 469 '
 470
 471 test_expect_success "don't fetch submodule when newly recorded commits are already present" '
 472         (
 473                 cd submodule &&
 474                 git checkout -q HEAD^^
 475         ) &&
 476         head1=$(git rev-parse --short HEAD) &&
 477         git add submodule &&
 478         git commit -m "submodule rewound" &&
 479         head2=$(git rev-parse --short HEAD) &&
 480         echo "From $pwd/." > expect.err &&
 481         echo "   $head1..$head2  super      -> origin/super" >> expect.err &&
 482         (
 483                 cd downstream &&
 484                 git fetch >../actual.out 2>../actual.err
 485         ) &&
 486         test_must_be_empty actual.out &&
 487         test_i18ncmp expect.err actual.err &&
 488         (
 489                 cd submodule &&
 490                 git checkout -q sub
 491         )
 492 '
 493
 494 test_expect_success "'fetch.recurseSubmodules=on-demand' works also without .gitmodules entry" '
 495         (
 496                 cd downstream &&
 497                 git fetch --recurse-submodules
 498         ) &&
 499         add_upstream_commit &&
 500         head1=$(git rev-parse --short HEAD) &&
 501         git add submodule &&
 502         git rm .gitmodules &&
 503         git commit -m "new submodule without .gitmodules" &&
 504         head2=$(git rev-parse --short HEAD) &&
 505         echo "From $pwd/." >expect.err.2 &&
 506         echo "   $head1..$head2  super      -> origin/super" >>expect.err.2 &&
 507         head -3 expect.err >>expect.err.2 &&
 508         (
 509                 cd downstream &&
 510                 rm .gitmodules &&
 511                 git config fetch.recurseSubmodules on-demand &&
 512                 # fake submodule configuration to avoid skipping submodule handling
 513                 git config -f .gitmodules submodule.fake.path fake &&
 514                 git config -f .gitmodules submodule.fake.url fakeurl &&
 515                 git add .gitmodules &&
 516                 git config --unset submodule.submodule.url &&
 517                 git fetch >../actual.out 2>../actual.err &&
 518                 # cleanup
 519                 git config --unset fetch.recurseSubmodules &&
 520                 git reset --hard
 521         ) &&
 522         test_must_be_empty actual.out &&
 523         test_i18ncmp expect.err.2 actual.err &&
 524         git checkout HEAD^ -- .gitmodules &&
 525         git add .gitmodules &&
 526         git commit -m "new submodule restored .gitmodules"
 527 '
 528
 529 test_expect_success 'fetching submodules respects parallel settings' '
 530         git config fetch.recurseSubmodules true &&
 531         (
 532                 cd downstream &&
 533                 GIT_TRACE=$(pwd)/trace.out git fetch &&
 534                 grep "1 tasks" trace.out &&
 535                 GIT_TRACE=$(pwd)/trace.out git fetch --jobs 7 &&
 536                 grep "7 tasks" trace.out &&
 537                 git config submodule.fetchJobs 8 &&
 538                 GIT_TRACE=$(pwd)/trace.out git fetch &&
 539                 grep "8 tasks" trace.out &&
 540                 GIT_TRACE=$(pwd)/trace.out git fetch --jobs 9 &&
 541                 grep "9 tasks" trace.out
 542         )
 543 '
 544
 545 test_expect_success 'fetching submodule into a broken repository' '
 546         # Prepare src and src/sub nested in it
 547         git init src &&
 548         (
 549                 cd src &&
 550                 git init sub &&
 551                 git -C sub commit --allow-empty -m "initial in sub" &&
 552                 git submodule add -- ./sub sub &&
 553                 git commit -m "initial in top"
 554         ) &&
 555
 556         # Clone the old-fashoned way
 557         git clone src dst &&
 558         git -C dst clone ../src/sub sub &&
 559
 560         # Make sure that old-fashoned layout is still supported
 561         git -C dst status &&
 562
 563         # "diff" would find no change
 564         git -C dst diff --exit-code &&
 565
 566         # Recursive-fetch works fine
 567         git -C dst fetch --recurse-submodules &&
 568
 569         # Break the receiving submodule
 570         rm -f dst/sub/.git/HEAD &&
 571
 572         # NOTE: without the fix the following tests will recurse forever!
 573         # They should terminate with an error.
 574
 575         test_must_fail git -C dst status &&
 576         test_must_fail git -C dst diff &&
 577         test_must_fail git -C dst fetch --recurse-submodules
 578 '
 579
 580 test_expect_success "fetch new commits when submodule got renamed" '
 581         git clone . downstream_rename &&
 582         (
 583                 cd downstream_rename &&
 584                 git submodule update --init --recursive &&
 585                 git checkout -b rename &&
 586                 git mv submodule submodule_renamed &&
 587                 (
 588                         cd submodule_renamed &&
 589                         git checkout -b rename_sub &&
 590                         echo a >a &&
 591                         git add a &&
 592                         git commit -ma &&
 593                         git push origin rename_sub &&
 594                         git rev-parse HEAD >../../expect
 595                 ) &&
 596                 git add submodule_renamed &&
 597                 git commit -m "update renamed submodule" &&
 598                 git push origin rename
 599         ) &&
 600         (
 601                 cd downstream &&
 602                 git fetch --recurse-submodules=on-demand &&
 603                 (
 604                         cd submodule &&
 605                         git rev-parse origin/rename_sub >../../actual
 606                 )
 607         ) &&
 608         test_cmp expect actual
 609 '
 610
 611 test_expect_success "fetch new submodule commits on-demand outside standard refspec" '
 612         # add a second submodule and ensure it is around in downstream first
 613         git clone submodule sub1 &&
 614         git submodule add ./sub1 &&
 615         git commit -m "adding a second submodule" &&
 616         git -C downstream pull &&
 617         git -C downstream submodule update --init --recursive &&
 618
 619         git checkout --detach &&
 620
 621         C=$(git -C submodule commit-tree -m "new change outside refs/heads" HEAD^{tree}) &&
 622         git -C submodule update-ref refs/changes/1 $C &&
 623         git update-index --cacheinfo 160000 $C submodule &&
 624         test_tick &&
 625
 626         D=$(git -C sub1 commit-tree -m "new change outside refs/heads" HEAD^{tree}) &&
 627         git -C sub1 update-ref refs/changes/2 $D &&
 628         git update-index --cacheinfo 160000 $D sub1 &&
 629
 630         git commit -m "updated submodules outside of refs/heads" &&
 631         E=$(git rev-parse HEAD) &&
 632         git update-ref refs/changes/3 $E &&
 633         (
 634                 cd downstream &&
 635                 git fetch --recurse-submodules origin refs/changes/3:refs/heads/my_branch &&
 636                 git -C submodule cat-file -t $C &&
 637                 git -C sub1 cat-file -t $D &&
 638                 git checkout --recurse-submodules FETCH_HEAD
 639         )
 640 '
 641
 642 test_expect_success 'fetch new submodule commit on-demand in FETCH_HEAD' '
 643         # depends on the previous test for setup
 644
 645         C=$(git -C submodule commit-tree -m "another change outside refs/heads" HEAD^{tree}) &&
 646         git -C submodule update-ref refs/changes/4 $C &&
 647         git update-index --cacheinfo 160000 $C submodule &&
 648         test_tick &&
 649
 650         D=$(git -C sub1 commit-tree -m "another change outside refs/heads" HEAD^{tree}) &&
 651         git -C sub1 update-ref refs/changes/5 $D &&
 652         git update-index --cacheinfo 160000 $D sub1 &&
 653
 654         git commit -m "updated submodules outside of refs/heads" &&
 655         E=$(git rev-parse HEAD) &&
 656         git update-ref refs/changes/6 $E &&
 657         (
 658                 cd downstream &&
 659                 git fetch --recurse-submodules origin refs/changes/6 &&
 660                 git -C submodule cat-file -t $C &&
 661                 git -C sub1 cat-file -t $D &&
 662                 git checkout --recurse-submodules FETCH_HEAD
 663         )
 664 '
 665
 666 test_expect_success 'fetch new submodule commits on-demand without .gitmodules entry' '
 667         # depends on the previous test for setup
 668
 669         git config -f .gitmodules --remove-section submodule.sub1 &&
 670         git add .gitmodules &&
 671         git commit -m "delete gitmodules file" &&
 672         git checkout -B super &&
 673         git -C downstream fetch &&
 674         git -C downstream checkout origin/super &&
 675
 676         C=$(git -C submodule commit-tree -m "yet another change outside refs/heads" HEAD^{tree}) &&
 677         git -C submodule update-ref refs/changes/7 $C &&
 678         git update-index --cacheinfo 160000 $C submodule &&
 679         test_tick &&
 680
 681         D=$(git -C sub1 commit-tree -m "yet another change outside refs/heads" HEAD^{tree}) &&
 682         git -C sub1 update-ref refs/changes/8 $D &&
 683         git update-index --cacheinfo 160000 $D sub1 &&
 684
 685         git commit -m "updated submodules outside of refs/heads" &&
 686         E=$(git rev-parse HEAD) &&
 687         git update-ref refs/changes/9 $E &&
 688         (
 689                 cd downstream &&
 690                 git fetch --recurse-submodules origin refs/changes/9 &&
 691                 git -C submodule cat-file -t $C &&
 692                 git -C sub1 cat-file -t $D &&
 693                 git checkout --recurse-submodules FETCH_HEAD
 694         )
 695 '
 696
 697 test_expect_success 'fetch new submodule commit intermittently referenced by superproject' '
 698         # depends on the previous test for setup
 699
 700         D=$(git -C sub1 commit-tree -m "change 10 outside refs/heads" HEAD^{tree}) &&
 701         E=$(git -C sub1 commit-tree -m "change 11 outside refs/heads" HEAD^{tree}) &&
 702         F=$(git -C sub1 commit-tree -m "change 12 outside refs/heads" HEAD^{tree}) &&
 703
 704         git -C sub1 update-ref refs/changes/10 $D &&
 705         git update-index --cacheinfo 160000 $D sub1 &&
 706         git commit -m "updated submodules outside of refs/heads" &&
 707
 708         git -C sub1 update-ref refs/changes/11 $E &&
 709         git update-index --cacheinfo 160000 $E sub1 &&
 710         git commit -m "updated submodules outside of refs/heads" &&
 711
 712         git -C sub1 update-ref refs/changes/12 $F &&
 713         git update-index --cacheinfo 160000 $F sub1 &&
 714         git commit -m "updated submodules outside of refs/heads" &&
 715
 716         G=$(git rev-parse HEAD) &&
 717         git update-ref refs/changes/13 $G &&
 718         (
 719                 cd downstream &&
 720                 git fetch --recurse-submodules origin refs/changes/13 &&
 721
 722                 git -C sub1 cat-file -t $D &&
 723                 git -C sub1 cat-file -t $E &&
 724                 git -C sub1 cat-file -t $F
 725         )
 726 '
 727
 728 add_commit_push () {
 729         dir="$1" &&
 730         msg="$2" &&
 731         shift 2 &&
 732         git -C "$dir" add "$@" &&
 733         git -C "$dir" commit -a -m "$msg" &&
 734         git -C "$dir" push
 735 }
 736
 737 compare_refs_in_dir () {
 738         fail= &&
 739         if test "x$1" = 'x!'
 740         then
 741                 fail='!' &&
 742                 shift
 743         fi &&
 744         git -C "$1" rev-parse --verify "$2" >expect &&
 745         git -C "$3" rev-parse --verify "$4" >actual &&
 746         eval $fail test_cmp expect actual
 747 }
 748
 749
 750 test_expect_success 'setup nested submodule fetch test' '
 751         # does not depend on any previous test setups
 752
 753         for repo in outer middle inner
 754         do
 755                 git init --bare $repo &&
 756                 git clone $repo ${repo}_content &&
 757                 echo "$repo" >"${repo}_content/file" &&
 758                 add_commit_push ${repo}_content "initial" file ||
 759                 return 1
 760         done &&
 761
 762         git clone outer A &&
 763         git -C A submodule add "$pwd/middle" &&
 764         git -C A/middle/ submodule add "$pwd/inner" &&
 765         add_commit_push A/middle/ "adding inner sub" .gitmodules inner &&
 766         add_commit_push A/ "adding middle sub" .gitmodules middle &&
 767
 768         git clone outer B &&
 769         git -C B/ submodule update --init middle &&
 770
 771         compare_refs_in_dir A HEAD B HEAD &&
 772         compare_refs_in_dir A/middle HEAD B/middle HEAD &&
 773         test_path_is_file B/file &&
 774         test_path_is_file B/middle/file &&
 775         test_path_is_missing B/middle/inner/file &&
 776
 777         echo "change on inner repo of A" >"A/middle/inner/file" &&
 778         add_commit_push A/middle/inner "change on inner" file &&
 779         add_commit_push A/middle "change on inner" inner &&
 780         add_commit_push A "change on inner" middle
 781 '
 782
 783 test_expect_success 'fetching a superproject containing an uninitialized sub/sub project' '
 784         # depends on previous test for setup
 785
 786         git -C B/ fetch &&
 787         compare_refs_in_dir A origin/HEAD B origin/HEAD
 788 '
 789
 790 fetch_with_recursion_abort () {
 791         # In a regression the following git call will run into infinite recursion.
 792         # To handle that, we connect the sed command to the git call by a pipe
 793         # so that sed can kill the infinite recursion when detected.
 794         # The recursion creates git output like:
 795         # Fetching submodule sub
 796         # Fetching submodule sub/sub              <-- [1]
 797         # Fetching submodule sub/sub/sub
 798         # ...
 799         # [1] sed will stop reading and cause git to eventually stop and die
 800
 801         git -C "$1" fetch --recurse-submodules 2>&1 |
 802                 sed "/Fetching submodule $2[^$]/q" >out &&
 803         ! grep "Fetching submodule $2[^$]" out
 804 }
 805
 806 test_expect_success 'setup recursive fetch with uninit submodule' '
 807         # does not depend on any previous test setups
 808
 809         test_create_repo super &&
 810         test_commit -C super initial &&
 811         test_create_repo sub &&
 812         test_commit -C sub initial &&
 813         git -C sub rev-parse HEAD >expect &&
 814
 815         git -C super submodule add ../sub &&
 816         git -C super commit -m "add sub" &&
 817
 818         git clone super superclone &&
 819         git -C superclone submodule status >out &&
 820         sed -e "s/^-//" -e "s/ sub.*$//" out >actual &&
 821         test_cmp expect actual
 822 '
 823
 824 test_expect_success 'recursive fetch with uninit submodule' '
 825         # depends on previous test for setup
 826
 827         fetch_with_recursion_abort superclone sub &&
 828         git -C superclone submodule status >out &&
 829         sed -e "s/^-//" -e "s/ sub$//" out >actual &&
 830         test_cmp expect actual
 831 '
 832
 833 test_expect_success 'recursive fetch after deinit a submodule' '
 834         # depends on previous test for setup
 835
 836         git -C superclone submodule update --init sub &&
 837         git -C superclone submodule deinit -f sub &&
 838
 839         fetch_with_recursion_abort superclone sub &&
 840         git -C superclone submodule status >out &&
 841         sed -e "s/^-//" -e "s/ sub$//" out >actual &&
 842         test_cmp expect actual
 843 '
 844
 845 test_done