want_color: automatically fallback to color.ui

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 64390d716d68b79b5a0915a707c95f5c2df39a46..395bf609ad9892d5c7e2d44ed5d75f6b51114d3d 100644 (file)
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -357,6 +357,24 @@ test_chmod () {
        git update-index --add "--chmod=$@"
 }
 
+# Unset a configuration variable, but don't fail if it doesn't exist.
+test_unconfig () {
+       git config --unset-all "$@"
+       config_status=$?
+       case "$config_status" in
+       5) # ok, nothing to unset
+               config_status=0
+               ;;
+       esac
+       return $config_status
+}
+
+# Set git config, automatically unsetting it after the test is over.
+test_config () {
+       test_when_finished "test_unconfig '$1'" &&
+       git config "$@"
+}
+
 # Use test_set_prereq to tell that a particular prerequisite is available.
 # The prerequisite can later be checked for in two ways:
 #
@@ -446,9 +464,14 @@ test_debug () {
 
 test_run_ () {
        test_cleanup=:
+       expecting_failure=$2
        eval >&3 2>&4 "$1"
        eval_ret=$?
-       eval >&3 2>&4 "$test_cleanup"
+
+       if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
+       then
+               eval >&3 2>&4 "$test_cleanup"
+       fi
        if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
                echo ""
        fi
@@ -497,7 +520,7 @@ test_expect_failure () {
        if ! test_skip "$@"
        then
                say >&3 "checking known breakage: $2"
-               test_run_ "$2"
+               test_run_ "$2" expecting_failure
                if [ "$?" = 0 -a "$eval_ret" = 0 ]
                then
                        test_known_broken_ok_ "$1"
@@ -774,6 +797,9 @@ test_cmp() {
 #
 # except that the greeting and config --unset must both succeed for
 # the test to pass.
+#
+# Note that under --immediate mode, no clean-up is done to help diagnose
+# what went wrong.
 
 test_when_finished () {
        test_cleanup="{ $*
@@ -884,8 +910,13 @@ then
        }
 
        make_valgrind_symlink () {
-               # handle only executables
-               test -x "$1" || return
+               # handle only executables, unless they are shell libraries that
+               # need to be in the exec-path.  We will just use "#!" as a
+               # guess for a shell-script, since we have no idea what the user
+               # may have configured as the shell path.
+               test -x "$1" ||
+               test "#!" = "$(head -c 2 <"$1")" ||
+               return;
 
                base=$(basename "$1")
                symlink_target=$GIT_BUILD_DIR/$base