t/t5522-pull-symlink.sh

   1 #!/bin/sh
   2
   3 test_description='pulling from symlinked subdir'
   4
   5 . ./test-lib.sh
   6
   7 if ! test_have_prereq SYMLINKS
   8 then
   9         skip_all='Symbolic links not supported, skipping tests.'
  10         test_done
  11 fi
  12
  13 # The scenario we are building:
  14 #
  15 #   trash\ directory/
  16 #     clone-repo/
  17 #       subdir/
  18 #         bar
  19 #     subdir-link -> clone-repo/subdir/
  20 #
  21 # The working directory is subdir-link.
  22
  23 test_expect_success setup '
  24         mkdir subdir &&
  25         echo file >subdir/file &&
  26         git add subdir/file &&
  27         git commit -q -m file &&
  28         git clone -q . clone-repo &&
  29         ln -s clone-repo/subdir/ subdir-link &&
  30         (
  31                 cd clone-repo &&
  32                 git config receive.denyCurrentBranch warn
  33         ) &&
  34         git config receive.denyCurrentBranch warn
  35 '
  36
  37 # Demonstrate that things work if we just avoid the symlink
  38 #
  39 test_expect_success 'pulling from real subdir' '
  40         (
  41                 echo real >subdir/file &&
  42                 git commit -m real subdir/file &&
  43                 cd clone-repo/subdir/ &&
  44                 git pull &&
  45                 test real = $(cat file)
  46         )
  47 '
  48
  49 # From subdir-link, pulling should work as it does from
  50 # clone-repo/subdir/.
  51 #
  52 # Instead, the error pull gave was:
  53 #
  54 #   fatal: 'origin': unable to chdir or not a git archive
  55 #   fatal: The remote end hung up unexpectedly
  56 #
  57 # because git would find the .git/config for the "trash directory"
  58 # repo, not for the clone-repo repo.  The "trash directory" repo
  59 # had no entry for origin.  Git found the wrong .git because
  60 # git rev-parse --show-cdup printed a path relative to
  61 # clone-repo/subdir/, not subdir-link/.  Git rev-parse --show-cdup
  62 # used the correct .git, but when the git pull shell script did
  63 # "cd `git rev-parse --show-cdup`", it ended up in the wrong
  64 # directory.  A POSIX shell's "cd" works a little differently
  65 # than chdir() in C; "cd -P" is much closer to chdir().
  66 #
  67 test_expect_success 'pulling from symlinked subdir' '
  68         (
  69                 echo link >subdir/file &&
  70                 git commit -m link subdir/file &&
  71                 cd subdir-link/ &&
  72                 git pull &&
  73                 test link = $(cat file)
  74         )
  75 '
  76
  77 # Prove that the remote end really is a repo, and other commands
  78 # work fine in this context.  It's just that "git pull" breaks.
  79 #
  80 test_expect_success 'pushing from symlinked subdir' '
  81         (
  82                 cd subdir-link/ &&
  83                 echo push >file &&
  84                 git commit -m push ./file &&
  85                 git push
  86         ) &&
  87         test push = $(git show HEAD:subdir/file)
  88 '
  89
  90 test_done