New lookup plugin csvreader

lib/ansible/runner/lookup_plugins/csvfile.py

+# (c) 2013, 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
+import codecs
+import csv
+
+class LookupModule(object):
+
+    def __init__(self, basedir=None, **kwargs):
+        self.basedir = basedir
+
+    def read_csv(self, filename, key, delimiter, dflt=None, col=1):
+
+        try:
+            f = codecs.open(filename, 'r', encoding='utf-8')
+            creader = csv.reader(f, delimiter=delimiter)
+
+            for row in creader:
+                if row[0] == key:
+                    return row[int(col)]
+        except Exception, e:
+            raise errors.AnsibleError("csvfile: %s" % str(e))
+
+        return dflt
+
+    def run(self, terms, inject=None, **kwargs):
+
+        terms = utils.listify_lookup_plugin_terms(terms, self.basedir, inject)
+
+        if isinstance(terms, basestring):
+            terms = [ terms ]
+
+        ret = []
+        for term in terms:
+            params = term.split()
+            key = params[0]
+
+            paramvals = {
+                'file' : 'ansible.csv',
+                'default' : None,
+                'delimiter' : "TAB",
+                'col' : "1",          # column to return
+            }
+
+            # parameters specified?
+            try:
+                for param in params[1:]:
+                    name, value = param.split('=')
+                    assert(name in paramvals)
+                    paramvals[name] = value
+            except (ValueError, AssertionError) as e:
+                raise errors.AnsibleError(e)
+
+            if paramvals['delimiter'] == 'TAB':
+                paramvals['delimiter'] = "\t"
+
+            path = utils.path_dwim(self.basedir, paramvals['file'])
+
+            var = self.read_csv(path, key, paramvals['delimiter'], paramvals['default'], paramvals['col'])
+            if var is not None:
+                if type(var) is list:
+                    for v in var:
+                        ret.append(v)
+                else:
+                    ret.append(var)
+        return ret