move UrgencyLog class to daklib

Signed-off-by: NMark Hymers <mhy@debian.org>

daklib/urgencylog.py

+#!/usr/bin/env python
+# vim:set et sw=4:
+
+"""
+Urgency Logger class for dak
+
+@contact: Debian FTP Master <ftpmaster@debian.org>
+@copyright: 2001 - 2006 James Troup <james@nocrew.org>
+@copyright: 2009  Joerg Jaspert <joerg@debian.org>
+@license: GNU General Public License version 2 or later
+"""
+
+# 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 2 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 singleton import Singleton
+from config import Config
+from utils import warn, open_file, move
+
+###############################################################################
+
+class UrgencyLog(Singleton):
+    "Urgency Logger object"
+    def __init__(self, *args, **kwargs):
+        super(UrgencyLog, self).__init__(*args, **kwargs)
+
+    def _startup(self):
+        "Initialize a new Urgency Logger object"
+
+        self.timestamp = time.strftime("%Y%m%d%H%M%S")
+
+        # Create the log directory if it doesn't exist
+        self.log_dir = Config()["Dir::UrgencyLog"]
+
+        if not os.path.exists(self.log_dir) or not os.access(self.log_dir, os.W_OK):
+            warn("UrgencyLog directory %s does not exist or is not writeable, using /srv/ftp.debian.org/tmp/ instead" % (self.log_dir))
+            self.log_dir = '/srv/ftp.debian.org/tmp/'
+
+        # Open the logfile
+        self.log_filename = "%s/.install-urgencies-%s.new" % (self.log_dir, self.timestamp)
+        self.log_file = open_file(self.log_filename, 'w')
+        self.writes = 0
+
+    def log(self, source, version, urgency):
+        "Log an event"
+        self.log_file.write(" ".join([source, version, urgency])+'\n')
+        self.log_file.flush()
+        self.writes += 1
+
+    def close(self):
+        "Close a Logger object"
+        self.log_file.flush()
+        self.log_file.close()
+
+        if self.writes:
+            new_filename = "%s/install-urgencies-%s" % (self.log_dir, self.timestamp)
+            move(self.log_filename, new_filename)
+        else:
+            os.unlink(self.log_filename)
+