Settings class to remove redundant code for parsing config file.

If a module wants to access bcfg2 settings:

from Bcfg2.Settings import settings



git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@4131 ce84e21b-d406-0410-9b95-82705330c041

1 files changed, 145 insertions, 0 deletions

diff --git a/src/lib/Settings.py b/src/lib/Settings.py
new file mode 100644
index 000000000..4a47c6f8d
--- /dev/null
+++ b/src/lib/Settings.py
@@ -0,0 +1,145 @@
+"""
+Settings for bcfg2.
+FIXME: simplify code!
+FIXME: add statistics configuration
+"""
+
+__revision__ = '$Revision$'
+
+import logging, socket, ConfigParser
+
+class Settings(object):
+
+    def __init__(self):
+        self.CONFIG_FILE             = self.default_config_file()
+
+        self.SERVER_GENERATORS       = self.default_server_generators()
+        self.SERVER_REPOSITORY       = self.default_server_repository()
+        self.SERVER_STRUCTURES       = self.default_server_structures()
+        self.SERVER_SVN              = self.default_server_svn()
+
+        self.COMMUNICATION_KEY       = self.default_communication_key()
+        self.COMMUNICATION_PASSWORD  = self.default_communication_password()
+        self.COMMUNICATION_PROTOCOL  = self.default_communication_protocol()
+        self.COMMUNICATION_USER      = self.default_communication_user()
+
+        self.COMPONENTS_BCFG2        = self.default_components_bcfg2()
+        self.COMPONENTS_BCFG2_STATIC = self.default_components_bcfg2_static()
+
+
+    def __getattr__(self, name):
+        print "name = %s\n" % name
+        if name == '__members__':
+            return self.name()
+        return getattr(self, name)
+
+    def read_config_file(self, filename):
+
+        logger = logging.getLogger('bcfg2 settings')
+
+        # set config file
+        if not filename:
+          logger.info("No config file given. Trying default config file '%s'." % self.CONFIG_FILE)
+        else:
+          logger.debug("Trying user specified config file '%s'." % filename)
+          self.CONFIG_FILE = filename
+
+        # open config file
+        try:
+            cf = open(self.CONFIG_FILE)
+        except IOError:
+            logger.info("Skipping not accessable config file '%s'." % self.CONFIG_FILE)
+            return
+
+        # parse config file
+        cfp = ConfigParser.ConfigParser()
+        try:
+            cfp.readfp(cf)
+        except Exception, e:
+          logger.error("Content of config file '%s' is not valid. Correct it!\n%s\n" % (self.CONFIG_FILE, e))
+          raise SystemExit, 1
+        # communication config
+        if cfp.has_section('communication'):
+            try:
+                self.COMMUNICATION_PROTOCOL = cfp.get('communication','protocol')
+            except:
+              pass
+            try:
+                self.COMMUNICATION_PASSWORD = cfp.get('communication','password')
+            except:
+              pass
+            try:
+                self.COMMUNICATION_KEY      = cfp.get('communication','key')
+            except:
+              pass
+            try:
+                self.COMMUNICATION_USER     = cfp.get('communication','user')
+            except:
+              pass
+        # components config
+        if cfp.has_section('components'):
+            try:
+                self.COMPONENTS_BCFG2 = cfp.get('components', 'bcfg2')
+                self.COMPONENTS_BCFG2_STATIC = True
+            except:
+                pass
+        # server config
+        if cfp.has_section('server'):
+            try:
+                self.SERVER_GENERATORS = cfp.get('server','generators').replace(' ','').split(',')
+            except:
+              pass
+            try:
+                self.SERVER_REPOSITORY = cfp.get('server','repository')
+            except:
+              pass
+            try:
+                self.SERVER_STRUCTURES = cfp.get('server','structures').replace(' ','').split(',')
+            except:
+              pass
+            try:
+                self.SERVER_SVN        = cfp.get('server','svn')
+            except:
+              pass
+
+        return
+
+    def default_config_file(self):
+        return '/etc/bcfg2.conf'
+
+    def default_server_generators(self):
+        return ['SSHbase', 'Cfg', 'Pkgmgr', 'Rules']
+
+    def default_server_structures(self):
+        return ['Bundler', 'Base']
+
+    def default_server_repository(self):
+        return '/var/lib/bcfg2/'
+
+    def default_communication_key(self):
+        return False
+
+    def default_communication_password(self):
+        return 'password'
+
+    def default_communication_protocol(self):
+        return 'xmlrpc/ssl'
+
+    def default_communication_user(self):
+        return 'root'
+
+    def default_components_bcfg2(self):
+        return (socket.gethostname(), 0)
+
+    def default_components_bcfg2_static(self):
+        return False
+
+    def default_sendmail_path(self):
+        return '/usr/sbin/sendmail'
+
+    def default_server_svn(self):
+        return None
+
+
+
+settings = Settings()