Add CLI `rq` to empty queues and requeue failed jobs

requirements.txt

@@ -1 +1,2 @@
 redis
+click

rq/scripts/rq.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+rq command line tool
+"""
+from __future__ import (absolute_import, division, print_function,
+                        unicode_literals)
+
+import click
+import redis
+from rq import get_failed_queue, Queue, use_connection
+from rq.exceptions import InvalidJobOperationError
+
+
+@click.group()
+@click.option('--url', '-u', envvar='URL',
+        help='URL describing Redis connection details.')
+def rq(url):
+    if url is None:
+        url = "redis://localhost:6379/0"
+    redis_conn = redis.from_url(url)
+    use_connection(redis_conn)
+
+
+@rq.command()
+@click.argument('queues', nargs=-1)
+def empty(queues):
+    """Empty queues, default: empty failed queue
+
+    $ rq empty
+    2 jobs removed from failed queue
+
+    $ rq empty default high
+    10 jobs removed from default queue
+    2 jobs removed from high queue
+    """
+    queues = list(map(Queue, queues))
+    if not queues:
+        queues = (get_failed_queue(),)
+    for queue in queues:
+        num_jobs = queue.empty()
+        print('{} jobs removed from {} queue'.format(num_jobs, queue.name))
+
+
+@rq.command()
+def requeue():
+    """Requeue all failed jobs in failed queue"""
+    failed_queue = get_failed_queue()
+    job_ids = failed_queue.job_ids
+    print('Requeuing {} failed jobs......'.format(len(job_ids)))
+    requeue_failed_num = 0
+    for job_id in job_ids:
+        try:
+            failed_queue.requeue(job_id)
+        except InvalidJobOperationError:
+            print('Requeue job({}) failed'.format(job_id))
+            requeue_failed_num += 1
+
+    print('Requeue over with {} jobs requeuing failed'.format(
+        requeue_failed_num))