Merge branch 'ab/test-bail'

A new feature has been added to abort early in the test framework.

* ab/test-bail:
  test-lib.sh: use "Bail out!" syntax on bad SANITIZE=leak use
  test-lib.sh: de-duplicate error() teardown code

t/test-lib.sh

@@ -589,17 +589,33 @@ USER_TERM="$TERM"
 TERM=dumb
 export TERM USER_TERM
 
-error () {
+_error_exit () {
-	say_color error "error: $*"
 	finalize_junit_xml
 	GIT_EXIT_OK=t
 	exit 1
 }
 
+error () {
+	say_color error "error: $*"
+	_error_exit
+}
+
 BUG () {
 	error >&7 "bug in the test script: $*"
 }
 
+BAIL_OUT () {
+	test $# -ne 1 && BUG "1 param"
+
+	# Do not change "Bail out! " string. It's part of TAP syntax:
+	# https://testanything.org/tap-specification.html
+	local bail_out="Bail out! "
+	local message="$1"
+
+	say_color error $bail_out "$message"
+	_error_exit
+}
+
 say () {
 	say_color info "$*"
 }
@@ -608,9 +624,7 @@ if test -n "$HARNESS_ACTIVE"
 then
 	if test "$verbose" = t || test -n "$verbose_only"
 	then
-		printf 'Bail out! %s\n' \
+		BAIL_OUT 'verbose mode forbidden under TAP harness; try --verbose-log'
-		 'verbose mode forbidden under TAP harness; try --verbose-log'
-		exit 1
 	fi
 fi
 
@@ -720,7 +734,7 @@ test_failure_ () {
 	say_color error "not ok $test_count - $1"
 	shift
 	printf '%s\n' "$*" | sed -e 's/^/#	/'
-	test "$immediate" = "" || { finalize_junit_xml; GIT_EXIT_OK=t; exit 1; }
+	test "$immediate" = "" || _error_exit
 }
 
 test_known_broken_ok_ () {
@@ -1398,7 +1412,7 @@ then
 	fi
 elif test_bool_env GIT_TEST_PASSING_SANITIZE_LEAK false
 then
-	error "GIT_TEST_PASSING_SANITIZE_LEAK=true has no effect except when compiled with SANITIZE=leak"
+	BAIL_OUT "GIT_TEST_PASSING_SANITIZE_LEAK=true has no effect except when compiled with SANITIZE=leak"
 fi
 
 # Last-minute variable setup