promise: New promise for self-setup cron.

slapos/package/promise/__init__.py

@@ -30,9 +30,12 @@
 
 import core
 import hostname
+import slappkgcron
 
 promise_list = (
   core.Promise,
   hostname.Promise,
+  slappkgcron.Promise,
+  limits.Promise
  )
 

slapos/package/promise/slappkgcron.py

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# Copyright (c) 2012-2014 Vifib SARL and Contributors.
+# All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly advised to contract a Free Software
+# Service Company
+#
+# This program 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.
+#
+# This program 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 this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+from slapos.package.base_promise import BasePromise
+from slapos.package.conf import get_template, create
+import os
+import pkg_resources
+
+
+class Promise(BasePromise):
+
+  configuration_file_path = '/etc/cron.d/slappkg-update' 
+
+  def _getCronTemplate(self, slapos_location, slapos_configuration):
+    configuration_content = get_template("update.cron.in")
+    return configuration_content % {
+                "configuration_path": self.config.slapos_configuration,
+                "slapos_location": "/opt/slapos"
+           } 
+
+  def checkConsistency(self, fixit=0, **kw):
+    is_ok = False
+
+    if os.path.exists(self.configuration_file_path):
+       expected_content = self._getCronTemplate()
+       with open(self.configuration_file_path, 'r') as actual_conf:
+         is_ok = expected_content == actual_conf.read()
+
+    if not is_ok and fixit:
+      return self.fixConsistency(**kw)
+
+    return is_ok
+
+  def fixConsistency(self, **kw):
+    self.log("Update cron : %s" % self.configuration_file_path)
+    if os.path.exists(self.configuration_file_path):
+      shutil.rmtree(self.configuration_file_path)
+
+    create(path=self.configuration_file_path,
+           text=self._getCronTemplate()) 
+
+    return self.checkConsistency(fixit=0, **kw)
+

slapos/package/template/update.cron.in

-# BEWARE: This file will be automatically regenerated on each boot
+# BEWARE: This file will be automatically regenerated on every run of 
+# slappkg
 SHELL=/bin/sh
 PATH=/usr/bin:/usr/sbin:/sbin:/bin:/usr/lib/news/bin:/usr/local/bin
 MAILTO=root
 
 # This file expects that 
-0 0 * * * root slappkg-update --slapos-configuration=%(configuration_path)s -v >> %(slapos_location)s/log/slappkg-update.log 2>&1
+0 */6 * * * root slappkg-update --slapos-configuration=%(configuration_path)s -v >> %(slapos_location)s/log/slappkg-update.log 2>&1