t/t6700-tree-depth.sh

   1 #!/bin/sh
   2
   3 test_description='handling of deep trees in various commands'
   4 . ./test-lib.sh
   5
   6 # We'll test against two depths here: a small one that will let us check the
   7 # behavior of the config setting easily, and a large one that should be
   8 # forbidden by default. Testing the default depth will let us know whether our
   9 # default is enough to prevent segfaults on systems that run the tests.
  10 small_depth=50
  11 big_depth=4100
  12
  13 small_ok="-c core.maxtreedepth=$small_depth"
  14 small_no="-c core.maxtreedepth=$((small_depth-1))"
  15
  16 # usage: mkdeep <name> <depth>
  17 #   Create a tag <name> containing a file whose path has depth <depth>.
  18 #
  19 # We'll use fast-import here for two reasons:
  20 #
  21 #   1. It's faster than creating $big_depth tree objects.
  22 #
  23 #   2. As we tighten tree limits, it's more likely to allow large sizes
  24 #      than trying to stuff a deep path into the index.
  25 mkdeep () {
  26         {
  27                 echo "commit refs/tags/$1" &&
  28                 echo "committer foo <foo@example.com> 1234 -0000" &&
  29                 echo "data <<EOF" &&
  30                 echo "the commit message" &&
  31                 echo "EOF" &&
  32
  33                 printf 'M 100644 inline ' &&
  34                 i=0 &&
  35                 while test $i -lt $2
  36                 do
  37                         printf 'a/'
  38                         i=$((i+1))
  39                 done &&
  40                 echo "file" &&
  41
  42                 echo "data <<EOF" &&
  43                 echo "the file contents" &&
  44                 echo "EOF" &&
  45                 echo
  46         } | git fast-import
  47 }
  48
  49 test_expect_success 'create small tree' '
  50         mkdeep small $small_depth
  51 '
  52
  53 test_expect_success 'create big tree' '
  54         mkdeep big $big_depth
  55 '
  56
  57 test_expect_success 'limit recursion of git-archive' '
  58         git $small_ok archive small >/dev/null &&
  59         test_must_fail git $small_no archive small >/dev/null
  60 '
  61
  62 test_expect_success 'default limit for git-archive fails gracefully' '
  63         test_must_fail git archive big >/dev/null
  64 '
  65
  66 test_expect_success 'limit recursion of ls-tree -r' '
  67         git $small_ok ls-tree -r small &&
  68         test_must_fail git $small_no ls-tree -r small
  69 '
  70
  71 test_expect_success 'default limit for ls-tree fails gracefully' '
  72         test_must_fail git ls-tree -r big >/dev/null
  73 '
  74
  75 test_expect_success 'limit recursion of rev-list --objects' '
  76         git $small_ok rev-list --objects small >/dev/null &&
  77         test_must_fail git $small_no rev-list --objects small >/dev/null
  78 '
  79
  80 test_expect_success 'default limit for rev-list fails gracefully' '
  81         test_must_fail git rev-list --objects big >/dev/null
  82 '
  83
  84 test_expect_success 'limit recursion of diff-tree -r' '
  85         git $small_ok diff-tree -r $EMPTY_TREE small &&
  86         test_must_fail git $small_no diff-tree -r $EMPTY_TREE small
  87 '
  88
  89 test_expect_success 'default limit for diff-tree fails gracefully' '
  90         test_must_fail git diff-tree -r $EMPTY_TREE big
  91 '
  92
  93 test_done