conf parsing for the cache section

feed2toot/confparsers/cache.py

@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+# Copyright © 2015-2017 Carl Chenet <carl.chenet@ohmytux.com>
+# 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
+# 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, see <http://www.gnu.org/licenses/
+
+# Get values of the cache section
+'''Get values of the cache section'''
+
+# standard library imports
+import os.path
+import sys
+
+def parsecache(clioption, config):
+    '''Parse configuration values and get values of the hashtaglist section'''
+    cachefile = ''
+    cachelimit = 100
+    section = 'cache'
+    if not clioption:
+        ##################
+        # cachefile option
+        ##################
+        confoption = 'cachefile'
+        if config.has_section(section):
+            cachefile = config.get(section, confoption)
+        else:
+            sys.exit('You should provide a {confoption} parameter in the [{section}] section'.format(section=section, confoption=confoption))
+        cachefile = os.path.expanduser(cachefile)
+        cachefileparent = os.path.dirname(cachefile)
+        if cachefileparent and not os.path.exists(cachefileparent):
+            sys.exit('The parent directory of the cache file does not exist: {cachefileparent}'.format(cachefileparent=cachefileparent))
+    else:
+        cachefile = clioption
+    ####################
+    # cache_limit option
+    ####################
+    if config.has_section(section):
+        confoption = 'cache_limit'
+        if config.has_option(section, confoption):
+            try:
+                cachelimit = int(config.get(section, confoption))
+            except ValueError as err:
+                sys.exit('Error in configuration with the {confoption} parameter in [{section}]: {err}'.format(confoption=confoption, section=section, err=err))
+        else:
+            cachelimit = 100
+    return cachefile, cachelimit