Add Redis GET $LOOKUP plugin

  renamed

lib/ansible/runner/lookup_plugins/redis_kv.py

+# (c) 2012, Jan-Piet Mens <jpmens(at)gmail.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+from ansible import utils, errors
+import os
+HAVE_REDIS=False
+try:
+    import redis        # https://github.com/andymccurdy/redis-py/
+    HAVE_REDIS=True
+except ImportError:
+    pass
+import re
+
+# ==============================================================
+# REDISGET: Obtain value from a GET on a Redis key. Terms
+# expected: 0 = URL, 1 = Key
+# URL may be empty, in which case redis://localhost:6379 assumed
+# --------------------------------------------------------------
+
+class LookupModule(object):
+
+    def __init__(self, basedir=None, **kwargs):
+        self.basedir = basedir
+
+        if HAVE_REDIS == False:
+            raise errors.AnsibleError("Can't LOOKUP(redis_kv): module redis is not installed")
+
+    def run(self, terms, **kwargs):
+
+        (url,key) = terms.split(',')
+        if url == "":
+            url = 'redis://localhost:6379'
+
+        # urlsplit on Python 2.6.1 is broken. Hmm. Probably also the reason
+        # Redis' from_url() doesn't work here.
+
+        p = '(?P<scheme>[^:]+)://?(?P<host>[^:/ ]+).?(?P<port>[0-9]*).*'
+
+        try:
+            m = re.search(p, url)
+            host = m.group('host')
+            port = int(m.group('port'))
+        except AttributeError:
+            raise errors.AnsibleError("Bad URI in redis lookup")
+
+        try:
+            conn = redis.Redis(host=host, port=port)
+            res = conn.get(key)
+            if res is None:
+                res = ""
+            return res
+        except:
+            return ""  # connection failed or key not found