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 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 mkdir subdir
  24 echo file >subdir/file
  25 git add subdir/file
  26 git commit -q -m file
  27 git clone -q . clone-repo
  28 ln -s clone-repo/subdir/ subdir-link
  29
  30
  31 # Demonstrate that things work if we just avoid the symlink
  32 #
  33 test_expect_success 'pulling from real subdir' '
  34         (
  35                 echo real >subdir/file &&
  36                 git commit -m real subdir/file &&
  37                 cd clone-repo/subdir/ &&
  38                 git pull &&
  39                 test real = $(cat file)
  40         )
  41 '
  42
  43 # From subdir-link, pulling should work as it does from
  44 # clone-repo/subdir/.
  45 #
  46 # Instead, the error pull gave was:
  47 #
  48 #   fatal: 'origin': unable to chdir or not a git archive
  49 #   fatal: The remote end hung up unexpectedly
  50 #
  51 # because git would find the .git/config for the "trash directory"
  52 # repo, not for the clone-repo repo.  The "trash directory" repo
  53 # had no entry for origin.  Git found the wrong .git because
  54 # git rev-parse --show-cdup printed a path relative to
  55 # clone-repo/subdir/, not subdir-link/.  Git rev-parse --show-cdup
  56 # used the correct .git, but when the git pull shell script did
  57 # "cd `git rev-parse --show-cdup`", it ended up in the wrong
  58 # directory.  A POSIX shell's "cd" works a little differently
  59 # than chdir() in C; "cd -P" is much closer to chdir().
  60 #
  61 test_expect_success 'pulling from symlinked subdir' '
  62         (
  63                 echo link >subdir/file &&
  64                 git commit -m link subdir/file &&
  65                 cd subdir-link/ &&
  66                 git pull &&
  67                 test link = $(cat file)
  68         )
  69 '
  70
  71 # Prove that the remote end really is a repo, and other commands
  72 # work fine in this context.  It's just that "git pull" breaks.
  73 #
  74 test_expect_success 'pushing from symlinked subdir' '
  75         (
  76                 cd subdir-link/ &&
  77                 echo push >file &&
  78                 git commit -m push ./file &&
  79                 git push
  80         ) &&
  81         test push = $(git show HEAD:subdir/file)
  82 '
  83
  84 test_done