t/t7009-filter-branch-null-sha1.sh

   1 #!/bin/sh
   2
   3 test_description='filter-branch removal of trees with null sha1'
   4 . ./test-lib.sh
   5
   6 test_expect_success 'setup: base commits' '
   7         test_commit one &&
   8         test_commit two &&
   9         test_commit three
  10 '
  11
  12 test_expect_success 'setup: a commit with a bogus null sha1 in the tree' '
  13         {
  14                 git ls-tree HEAD &&
  15                 printf "160000 commit $_z40\\tbroken\\n"
  16         } >broken-tree &&
  17         echo "add broken entry" >msg &&
  18
  19         tree=$(git mktree <broken-tree) &&
  20         test_tick &&
  21         commit=$(git commit-tree $tree -p HEAD <msg) &&
  22         git update-ref HEAD "$commit"
  23 '
  24
  25 # we have to make one more commit on top removing the broken
  26 # entry, since otherwise our index does not match HEAD (and filter-branch will
  27 # complain). We could make the index match HEAD, but doing so would involve
  28 # writing a null sha1 into the index.
  29 test_expect_success 'setup: bring HEAD and index in sync' '
  30         test_tick &&
  31         git commit -a -m "back to normal"
  32 '
  33
  34 test_expect_success 'noop filter-branch complains' '
  35         test_must_fail git filter-branch \
  36                 --force --prune-empty \
  37                 --index-filter "true"
  38 '
  39
  40 test_expect_success 'filter commands are still checked' '
  41         test_must_fail git filter-branch \
  42                 --force --prune-empty \
  43                 --index-filter "git rm --cached --ignore-unmatch three.t"
  44 '
  45
  46 test_expect_success 'removing the broken entry works' '
  47         echo three >expect &&
  48         git filter-branch \
  49                 --force --prune-empty \
  50                 --index-filter "git rm --cached --ignore-unmatch broken" &&
  51         git log -1 --format=%s >actual &&
  52         test_cmp expect actual
  53 '
  54
  55 test_done