pack-bitmap: save "have" bitmap from walk

diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index c55ef099c3f174de10a29aaddfb750fa07aa2d8a..4207af40777c69365dc395e800a7e4214beab076 100644 (file)
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -294,8 +294,20 @@ write_script () {
 # The single parameter is the prerequisite tag (a simple word, in all
 # capital letters by convention).
 
+test_unset_prereq () {
+       ! test_have_prereq "$1" ||
+       satisfied_prereq="${satisfied_prereq% $1 *} ${satisfied_prereq#* $1 }"
+}
+
 test_set_prereq () {
-       satisfied_prereq="$satisfied_prereq$1 "
+       case "$1" in
+       !*)
+               test_unset_prereq "${1#!}"
+               ;;
+       *)
+               satisfied_prereq="$satisfied_prereq$1 "
+               ;;
+       esac
 }
 satisfied_prereq=" "
 lazily_testable_prereq= lazily_tested_prereq=
@@ -553,6 +565,14 @@ test_path_is_dir () {
        fi
 }
 
+test_path_exists () {
+       if ! test -e "$1"
+       then
+               echo "Path $1 doesn't exist. $2"
+               false
+       fi
+}
+
 # Check if the directory exists and is empty as expected, barf otherwise.
 test_dir_is_empty () {
        test_path_is_dir "$1" &&