Replace clear zookeeper python with clear zookeeper bash

The zk-shell binary/library can save us from having to do
alot here so just use it and remove some code.

Change-Id: I07bde4dea61a125f7368349517e9878c2ee25608

tools/clear_zk.py

@@ -1,50 +0,0 @@
-#!/usr/bin/env python
-
-import contextlib
-import os
-import re
-import sys
-
-top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
-                                       os.pardir))
-sys.path.insert(0, top_dir)
-
-from taskflow.utils import kazoo_utils
-
-
-@contextlib.contextmanager
-def finalize_client(client):
-    try:
-        yield client
-    finally:
-        kazoo_utils.finalize_client(client)
-
-
-def iter_children(client, path):
-    if client.exists(path):
-        for child_path in client.get_children(path):
-            if path == "/":
-                child_path = "/%s" % (child_path)
-            else:
-                child_path = "%s/%s" % (path, child_path)
-            yield child_path
-            for child_child_path in iter_children(client, child_path):
-                yield child_child_path
-
-
-def main():
-    conf = {}
-    if len(sys.argv) > 1:
-        conf['hosts'] = sys.argv[1:]
-    with finalize_client(kazoo_utils.make_client(conf)) as client:
-        client.start(timeout=1.0)
-        children = list(iter_children(client, "/taskflow"))
-        for child_path in reversed(children):
-            if not re.match(r"^/taskflow/(.*?)-test/(.*)$", child_path):
-                continue
-            print("Deleting %s" % child_path)
-            client.delete(child_path)
-
-
-if __name__ == "__main__":
-    main()

tools/clear_zk.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# This requires https://pypi.python.org/pypi/zk_shell/ to be installed...
+
+set -e
+
+ZK_HOSTS=${ZK_HOSTS:-localhost:2181}
+TF_PATH=${TF_PATH:-taskflow}
+
+for path in `zk-shell --run-once "ls" $ZK_HOSTS`; do
+    if [[ $path == ${TF_PATH}* ]]; then
+        echo "Removing (recursively) path \"$path\""
+        zk-shell --run-once "rmr $path" $ZK_HOSTS
+    fi
+done