Add --taskstatus

Used for checking tasks in the status db.
Change `SBYStatusDB.all_tasks_status()` to use a `LEFT JOIN` to get a status of `UNKNOWN` for pending or aborted tasks (e.g. because they were ctrl+c'ed).

sbysrc/sby.py

@@ -63,6 +63,7 @@ init_config_file = args.init_config_file
 status_show = args.status
 status_reset = args.status_reset
 status_cancels = args.status_cancels
+task_status = args.task_status
 status_live_csv = args.livecsv
 status_show_csv = args.statuscsv
 status_latest = args.status_latest
@@ -71,7 +72,7 @@ if autotune and linkmode:
     print("ERROR: --link flag currently not available with --autotune")
     sys.exit(1)
 
-if status_show or status_reset or status_show_csv:
+if status_show or status_reset or task_status or status_show_csv:
     target = workdir_prefix or workdir or sbyfile
     if target is None:
         print("ERROR: Specify a .sby config file or working directory to use --status.")
@@ -105,6 +106,9 @@ if status_show or status_reset or status_show_csv:
 
     if status_show_csv:
         status_db.print_status_summary_csv(tasknames, status_latest)
+        
+    if task_status:
+        status_db.print_task_summary()
 
     status_db.db.close()
 

sbysrc/sby_cmdline.py

@@ -86,6 +86,9 @@ def parser_func(release_version='unknown SBY version'):
     parser.add_argument("--statuscancels", action="store_true", dest="status_cancels",
             help="intertask cancellations can be triggered by the status database")
 
+    parser.add_argument("--taskstatus", action="store_true", dest="task_status",
+            help="display the status of tasks in the status database")
+
     parser.add_argument("--init-config-file", dest="init_config_file",
             help="create a default .sby config file")
     parser.add_argument("sbyfile", metavar="<jobname>.sby | <dirname>", nargs="?",

sbysrc/sby_status.py

@@ -301,7 +301,7 @@ class SbyStatusDb:
                 SELECT task.id, task.name, task.created,
                 task_status.status, task_status.created as 'status_created'
                 FROM task
-                INNER JOIN task_status ON task_status.task=task.id
+                LEFT JOIN task_status ON task_status.task=task.id
             """
         ).fetchall()
 
@@ -399,6 +399,14 @@ class SbyStatusDb:
         for display_name, statuses in sorted(properties.items()):
             print(pretty_path(display_name), combine_statuses(statuses))
 
+    def print_task_summary(self):
+        tasks = self.all_tasks_status()
+        task_status = defaultdict(set)
+        for task in tasks.values():
+            task_status[task["name"]].add(task["status"] or "UNKNOWN")
+        for task_name, statuses in sorted(task_status.items()):
+            print(task_name, combine_statuses(statuses))
+
     def get_status_data_joined(self, status_id: int):
         row = self.db.execute(
             """