test-lib: fix GIT_EXIT_OK logic errors, use BAIL_OUT

Change various "exit 1" checks that happened after our "die" handler
had been set up to use BAIL_OUT instead. See 234383c (test-lib.sh:
use "Bail out!" syntax on bad SANITIZE=leak use, 2021-10-14) for the
benefits of the BAIL_OUT function.

The previous use of "error" here was not a logic error, but the "exit"
without "GIT_EXIT_OK" would emit the "FATAL: Unexpected exit with code
$code" message on top of the error we wanted to emit.

Since we'd also like to stop "prove" in its tracks here, the right
thing to do is to emit a "Bail out!" message.

Let's also move the "GIT_EXIT_OK=t" assignments to just above the
"exit [01]" in "test_done". It's not OK if we exit in
e.g. finalize_test_output.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

t/test-lib.sh

@@ -1173,8 +1173,6 @@ test_done () {
 	# removed, so the commands can access pidfiles and socket files.
 	test_atexit_handler
 
-	GIT_EXIT_OK=t
-
 	finalize_test_output
 
 	if test -z "$HARNESS_ACTIVE"
@@ -1246,6 +1244,7 @@ test_done () {
 		fi
 		test_at_end_hook_
 
+		GIT_EXIT_OK=t
 		exit 0 ;;
 
 	*)
@@ -1255,6 +1254,7 @@ test_done () {
 			say "1..$test_count"
 		fi
 
+		GIT_EXIT_OK=t
 		exit 1 ;;
 
 	esac
@@ -1387,14 +1387,12 @@ fi
 GITPERLLIB="$GIT_BUILD_DIR"/perl/build/lib
 export GITPERLLIB
 test -d "$GIT_BUILD_DIR"/templates/blt || {
-	error "You haven't built things yet, have you?"
+	BAIL_OUT "You haven't built things yet, have you?"
 }
 
 if ! test -x "$GIT_BUILD_DIR"/t/helper/test-tool$X
 then
-	echo >&2 'You need to build test-tool:'
-	echo >&2 'Run "make t/helper/test-tool" in the source (toplevel) directory'
-	exit 1
+	BAIL_OUT 'You need to build test-tool; Run "make t/helper/test-tool" in the source (toplevel) directory'
 fi
 
 # Are we running this test at all?
@@ -1448,9 +1446,7 @@ remove_trash_directory () {
 
 # Test repository
 remove_trash_directory "$TRASH_DIRECTORY" || {
-	GIT_EXIT_OK=t
-	echo >&5 "FATAL: Cannot prepare test area"
-	exit 1
+	BAIL_OUT 'cannot prepare test area'
 }
 
 remove_trash=t
@@ -1466,7 +1462,7 @@ fi
 
 # Use -P to resolve symlinks in our working directory so that the cwd
 # in subprocesses like git equals our $PWD (for pathname comparisons).
-cd -P "$TRASH_DIRECTORY" || exit 1
+cd -P "$TRASH_DIRECTORY" || BAIL_OUT "cannot cd -P to \"$TRASH_DIRECTORY\""
 
 start_test_output "$0"