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