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#!/bin/sh
test_description='handling of deep trees in various commands'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
# We'll test against two depths here: a small one that will let us check the
# behavior of the config setting easily, and a large one that should be
# forbidden by default. Testing the default depth will let us know whether our
# default is enough to prevent segfaults on systems that run the tests.
small_depth=50
big_depth=4100
small_ok="-c core.maxtreedepth=$small_depth"
small_no="-c core.maxtreedepth=$((small_depth-1))"
# usage: mkdeep <name> <depth>
# Create a tag <name> containing a file whose path has depth <depth>.
#
# We'll use fast-import here for two reasons:
#
# 1. It's faster than creating $big_depth tree objects.
#
# 2. As we tighten tree limits, it's more likely to allow large sizes
# than trying to stuff a deep path into the index.
mkdeep () {
{
echo "commit refs/tags/$1" &&
echo "committer foo <foo@example.com> 1234 -0000" &&
echo "data <<EOF" &&
echo "the commit message" &&
echo "EOF" &&
printf 'M 100644 inline ' &&
i=0 &&
while test $i -lt $2
do
printf 'a/'
i=$((i+1))
done &&
echo "file" &&
echo "data <<EOF" &&
echo "the file contents" &&
echo "EOF" &&
echo
} | git fast-import
}
test_expect_success 'create small tree' '
mkdeep small $small_depth
'
test_expect_success 'create big tree' '
mkdeep big $big_depth
'
test_expect_success 'limit recursion of git-archive' '
git $small_ok archive small >/dev/null &&
test_must_fail git $small_no archive small >/dev/null
'
test_expect_success 'default limit for git-archive fails gracefully' '
test_must_fail git archive big >/dev/null
'
test_expect_success 'limit recursion of ls-tree -r' '
git $small_ok ls-tree -r small &&
test_must_fail git $small_no ls-tree -r small
'
test_expect_success 'default limit for ls-tree fails gracefully' '
test_must_fail git ls-tree -r big >/dev/null
'
test_expect_success 'limit recursion of rev-list --objects' '
git $small_ok rev-list --objects small >/dev/null &&
test_must_fail git $small_no rev-list --objects small >/dev/null
'
test_expect_success 'default limit for rev-list fails gracefully' '
test_must_fail git rev-list --objects big >/dev/null
'
test_expect_success 'limit recursion of diff-tree -r' '
git $small_ok diff-tree -r $EMPTY_TREE small &&
test_must_fail git $small_no diff-tree -r $EMPTY_TREE small
'
test_expect_success 'default limit for diff-tree fails gracefully' '
test_must_fail git diff-tree -r $EMPTY_TREE big
'
test_done
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