Use TRIGGER to fail tasks depending upon a failed task

atom

@@ -412,6 +412,9 @@ done
 echo '
 	CREATE TEMPORARY TABLE tasks(
 		id		INTEGER PRIMARY KEY,
+		requires	INTEGER,
+		required	INTEGER,
+		status		INTEGER NOT NULL,
 		key		TEXT	UNIQUE,
 		rename_pattern	TEXT,
 		fat32compat	INTEGER,
@@ -479,15 +482,23 @@ echo '
 		cmd_arg57	TEXT,
 		cmd_arg58	TEXT,
 		cmd_arg59	TEXT,
-		requires	INTEGER,
-		required	INTEGER,
-		status		INTEGER NOT NULL,
 		cleanup		TEXT,
 		FOREIGN KEY(requires) REFERENCES tasks(id)
 			ON DELETE SET NULL
 	);
 	CREATE INDEX tasks_by_key ON tasks ( key );
 	CREATE INDEX tasks_by_sourcefile ON tasks ( source_file );
+
+	CREATE TEMPORARY TRIGGER fail_depends
+		AFTER UPDATE OF
+			status
+		ON
+			tasks
+		WHEN
+			NEW.status=2
+	BEGIN
+		UPDATE tasks SET status=2 WHERE requires=NEW.id;
+	END;
 ' >&3
 
 echo '

lib/database/open

@@ -15,5 +15,6 @@ openDatabase() {
 	cat $schema >&3
 	echo '.separator ::AtOM:SQL:Sep::' >&3
 	echo 'PRAGMA foreign_keys = ON;' >&3
+	echo 'PRAGMA recursive_triggers = ON;' >&3
 	checkDatabaseVersion
 }

lib/workers/cleaner

@@ -12,7 +12,6 @@ cleaner() {
 		(( failed+=faildepends ))
 		(( ran+=faildepends ))
 		Update tasks status 2 <<<"id = $taskid"
-		Update tasks status 2 <<<"requires = $taskid"
 		echo "SELECT	COUNT(*)
 			FROM	tasks
 			WHERE	( status = 0 OR status = 1 )