initial add of action plugin net_template

The net_config local action handles templating for network configuration
file.  It will also allow network device configurations to be backed up
to the control host

Note: this plugin was originally named net_config but has been refactored to
net_template

lib/ansible/plugins/action/net_template.py

@@ -0,0 +1,93 @@
+#
+# Copyright 2015 Peter Sprygada <psprygada@ansible.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 __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import sys
+import os
+import time
+import glob
+import urlparse
+
+from ansible.plugins.action import ActionBase
+from ansible.utils.boolean import boolean
+from ansible.utils.unicode import to_unicode
+
+BOOLEANS = ('true', 'false', 'yes', 'no')
+
+class ActionModule(ActionBase):
+
+    TRANSFERS_FILES = False
+
+    def run(self, tmp=None, task_vars=None):
+        result = super(ActionModule, self).run(tmp, task_vars)
+        result['changed'] = False
+
+        try:
+            self._handle_template()
+        except ValueError as exc:
+            return dict(failed=True, msg=exc.message)
+
+        result.update(self._execute_module(module_name=self._task.action,
+            module_args=self._task.args, task_vars=task_vars))
+
+        if self._task.args.get('backup'):
+            self._write_backup(task_vars['inventory_hostname'], result['_backup'])
+
+        if '_backup' in result:
+            del result['_backup']
+
+        return result
+
+    def _write_backup(self, host, contents):
+        if not os.path.exists('backup'):
+            os.mkdir('backup')
+        for fn in glob.glob('backup/%s*' % host):
+            os.remove(fn)
+        tstamp = time.strftime("%Y-%m-%d@%H:%M:%S", time.localtime(time.time()))
+        filename = 'backup/%s_config.%s' % (host, tstamp)
+        open(filename, 'w').write(contents)
+
+    def _handle_template(self):
+        src = self._task.args.get('src')
+
+        if os.path.isabs(src) or urlparse.urlsplit('src').scheme:
+            source = src
+
+        elif self._task._role is not None:
+            source = self._loader.path_dwim_relative(self._task._role._role_path, 'templates', src)
+            if not source:
+                source = self._loader.path_dwim_relative(self._task._role._role_path, src)
+        else:
+            source = self._loader.path_dwim_relative(self._loader.get_basedir(), 'templates', src)
+            if not source:
+                source = self._loader.path_dwim_relative(self._loader.get_basedir(), src)
+
+        if not os.path.exists(source):
+            return
+
+        try:
+            with open(source, 'r') as f:
+                template_data = to_unicode(f.read())
+        except IOError:
+            return dict(failed=True, msg='unable to load src file')
+
+        self._task.args['src'] = self._templar.template(template_data)
+
+