Rewrite rqinfo to start polling by default.

The options to show only partial info (only workers, only queues) are
kept, but not default anymore.  This makes the default invocation
(without args) the most useful one.

The default refresh interval is 2.5 seconds.

This fixes #42.

bin/rqinfo

@@ -38,7 +38,6 @@ def state_symbol(state):
 
 
 def show_queues(args):
-    while True:
     if len(args.queues):
         qs = map(Queue, args.queues)
     else:
@@ -57,16 +56,13 @@ def show_queues(args):
     scale = get_scale(max_count)
     ratio = chartwidth * 1.0 / scale
 
-        if args.interval:
-            os.system('clear')
-
     for q in qs:
         count = counts[q]
         if not args.raw:
             chart = green('|' + '█' * int(ratio * count))
             line = '%-12s %s %d' % (q.name, chart, count)
         else:
-                line = '%-12s %d' % (q.name, count)
+            line = 'queue %s %d' % (q.name, count)
         print(line)
 
         num_jobs += count
@@ -75,27 +71,40 @@ def show_queues(args):
     if not args.raw:
         print('%d queues, %d jobs total' % (len(qs), num_jobs))
 
-        if args.interval:
-            time.sleep(args.interval)
-        else:
-            break
 
 def show_workers(args):
-    while True:
+    if len(args.queues):
+        qs = map(Queue, args.queues)
+
+        def any_matching_queue(worker):
+            def queue_matches(q):
+                return q in qs
+            return any(map(queue_matches, worker.queues))
+
+        # Filter out workers that don't match the queue filter
+        ws = [w for w in Worker.all() if any_matching_queue(w)]
+    else:
         qs = Queue.all()
         ws = Worker.all()
 
-        if args.interval:
-            os.system('clear')
+    if not args.by_queue:
+        def filter_queues(queue_names):
+            return [qname for qname in queue_names if Queue(qname) in qs]
 
-        queues = {qname: [] for qname in qs}
+        for w in ws:
+            if not args.raw:
+                print '%s %s: %s' % (w.name, state_symbol(w.state), ', '.join(filter_queues(w.queue_names())))
+            else:
+                print 'worker %s %s %s' % (w.name, w.state, ','.join(filter_queues(w.queue_names())))
+    else:
+        # Create reverse lookup table
+        queues = {q: [] for q in qs}
         for w in ws:
             for q in w.queues:
                 if not q in queues:
-                    queues[q] = []
+                    continue
                 queues[q].append(w)
 
-        if args.by_queue:
         max_qname = max(map(lambda q: len(q.name), queues.keys())) if queues else 0
         for q in queues:
             if queues[q]:
@@ -103,15 +112,20 @@ def show_workers(args):
             else:
                 queues_str = '–'
             print '%s %s' % (pad(q.name + ':', max_qname + 1), queues_str)
-        else:
-            for w in ws:
-                print '%s %s: %s' % (w.name, state_symbol(w.state), ', '.join(w.queue_names()))
-        print '%d workers, %d queues' % (len(ws), len(queues))
 
-        if args.interval:
-            time.sleep(args.interval)
-        else:
-            break
+    if not args.raw:
+        print '%d workers, %d queues' % (len(ws), len(qs))
+
+
+def show_both(args):
+    show_queues(args)
+    if not args.raw:
+        print ''
+    show_workers(args)
+    if not args.raw:
+        print ''
+        import datetime
+        print 'Updated: %s' % datetime.datetime.now()
 
 
 def parse_args():
@@ -120,22 +134,24 @@ def parse_args():
     parser.add_argument('--port', '-p', type=int, default=6379, help='The Redis portnumber (default: 6379)')
     parser.add_argument('--db', '-d', type=int, default=0, help='The Redis database (default: 0)')
     parser.add_argument('--path', '-P', default='.', help='Specify the import path.')
+    parser.add_argument('--interval', '-i', metavar='N', type=float, default=2.5, help='Updates stats every N seconds (default: don\'t poll)')
+    parser.add_argument('--raw', '-r', action='store_true', default=False, help='Print only the raw numbers, no bar charts')
+    parser.add_argument('--only-queues', '-Q', dest='only_queues', default=False, action='store_true', help='Show only queue info')
+    parser.add_argument('--only-workers', '-W', dest='only_workers', default=False, action='store_true', help='Show only worker info')
+    parser.add_argument('--by-queue', '-R', dest='by_queue', default=False, action='store_true', help='Shows workers by queue')
+    parser.add_argument('queues', nargs='*', help='The queues to poll')
+    return parser.parse_args()
 
-    parent_parser = argparse.ArgumentParser(add_help=False)
-    parent_parser.add_argument('--interval', '-i', metavar='N', type=float, default=0, help='Updates stats every N seconds (default: don\'t poll)')
-
-    subparsers = parser.add_subparsers()
-
-    queues_p = subparsers.add_parser('queues', parents=[parent_parser], help='Show queue info')
-    queues_p.add_argument('--raw', '-r', action='store_true', default=False, help='Print only the raw numbers, no bar charts')
-    queues_p.add_argument('queues', nargs='*', help='The queues to poll')
-    queues_p.set_defaults(func=show_queues)
-
-    workers_p = subparsers.add_parser('workers', parents=[parent_parser], help='Show worker activity')
-    workers_p.add_argument('--by-queue', '-Q', dest='by_queue', default=False, action='store_true', help='Shows workers by queue')
-    workers_p.set_defaults(func=show_workers)
 
-    return parser.parse_args()
+def interval(val, func, args):
+    while True:
+        if val:
+            os.system('clear')
+        func(args)
+        if val:
+            time.sleep(val)
+        else:
+            break
 
 
 def main():
@@ -148,7 +164,14 @@ def main():
     redis_conn = redis.Redis(host=args.host, port=args.port, db=args.db)
     use_connection(redis_conn)
     try:
-        args.func(args)
+        if args.only_queues:
+            func = show_queues
+        elif args.only_workers:
+            func = show_workers
+        else:
+            func = show_both
+
+        interval(args.interval, func, args)
     except ConnectionError as e:
         print(e)