Define better warning facility.

cdist/__init__.py

@@ -20,9 +20,9 @@
 #
 
 import os
-import subprocess
 import hashlib
 
+import cdist.log
 import cdist.version
 
 VERSION = cdist.version.VERSION

cdist/argparse.py

@@ -17,13 +17,20 @@ EPILOG = "Get cdist at http://www.nico.schottelius.org/software/cdist/"
 parser = None
 
 
+_verbosity_level_off = -2
+_verbosity_level_debug = 3
 _verbosity_level = {
-    0: logging.ERROR,
-    1: logging.WARNING,
-    2: logging.INFO,
+    _verbosity_level_off: logging.OFF,
+    -1: logging.ERROR,
+    0: logging.WARNING,
+    1: logging.INFO,
+    2: logging.VERBOSE,
+    3: logging.DEBUG,
+    4: logging.TRACE,
 }
+# All verbosity levels above 4 are TRACE.
 _verbosity_level = collections.defaultdict(
-    lambda: logging.DEBUG, _verbosity_level)
+    lambda: logging.TRACE, _verbosity_level)
 
 
 def add_beta_command(cmd):
@@ -83,13 +90,18 @@ def get_parsers():
             '-d', '--debug',
             help=('Set log level to debug (deprecated, use -vvv instead)'),
             action='store_true', default=False)
+    parser['loglevel'].add_argument(
+            '-q', '--quiet',
+            help='Quiet mode: disables logging, including WARNING and ERROR',
+            action='store_true', default=False)
     parser['loglevel'].add_argument(
             '-v', '--verbose',
             help=('Increase the verbosity level. Every instance of -v '
                   'increments the verbosity level by one. Its default value '
-                  'is 0. There are 4 levels of verbosity. The order of levels '
-                  'from the lowest to the highest are: ERROR (0), '
-                  'WARNING (1), INFO (2) and DEBUG (3 or higher).'),
+                  'is 0 which includes ERROR and WARNING levels. '
+                  'The levels, in order from the lowest to the highest, are: '
+                  'ERROR (-1), WARNING (0), INFO (1), VERBOSE (2), DEBUG (3) '
+                  'TRACE (4 or higher).'),
             action='count', default=0)
 
     parser['beta'] = argparse.ArgumentParser(add_help=False)
@@ -213,10 +225,13 @@ def get_parsers():
 def handle_loglevel(args):
     if args.debug:
         retval = "-d/--debug is deprecated, use -vvv instead"
-        args.verbose = 3
+        args.verbose = _verbosity_level_debug
     else:
         retval = None
 
+    if args.quiet:
+        args.verbose = _verbosity_level_off
+
     logging.root.setLevel(_verbosity_level[args.verbose])
 
     return retval

cdist/log.py

@@ -23,6 +23,31 @@
 import logging
 
 
+# Define additional cdist logging levels.
+logging.OFF = logging.CRITICAL + 10  # disable logging
+logging.addLevelName(logging.OFF, 'OFF')
+
+logging.VERBOSE = logging.INFO - 5
+logging.addLevelName(logging.VERBOSE, 'VERBOSE')
+
+
+def _verbose(msg, *args, **kwargs):
+    logging.log(logging.VERBOSE, msg, *args, **kwargs)
+
+
+logging.verbose = _verbose
+
+logging.TRACE = logging.DEBUG - 5
+logging.addLevelName(logging.TRACE, 'TRACE')
+
+
+def _trace(msg, *args, **kwargs):
+    logging.log(logging.TRACE, msg, *args, **kwargs)
+
+
+logging.trace = _trace
+
+
 class Log(logging.Logger):
 
     def __init__(self, name):
@@ -37,3 +62,13 @@ class Log(logging.Logger):
         record.msg = self.name + ": " + str(record.msg)
 
         return True
+
+    def verbose(self, msg, *args, **kwargs):
+        self.log(logging.VERBOSE, msg, *args, **kwargs)
+
+    def trace(self, msg, *args, **kwargs):
+        self.log(logging.TRACE, msg, *args, **kwargs)
+
+
+logging.setLoggerClass(Log)
+logging.basicConfig(format='%(levelname)s: %(message)s')

cdist/util/ipaddr.py

@@ -45,7 +45,7 @@ def resolve_target_host_name(host):
         log.debug("derived host_name for host \"{}\": {}".format(
             host, host_name))
     except (socket.gaierror, socket.herror) as e:
-        log.warn("Could not derive host_name for {}"
+        log.warning("Could not derive host_name for {}"
                  ", $host_name will be empty. Error is: {}".format(host, e))
         # in case of error provide empty value
         host_name = ''
@@ -59,7 +59,7 @@ def resolve_target_fqdn(host):
         log.debug("derived host_fqdn for host \"{}\": {}".format(
             host, host_fqdn))
     except socket.herror as e:
-        log.warn("Could not derive host_fqdn for {}"
+        log.warning("Could not derive host_fqdn for {}"
                  ", $host_fqdn will be empty. Error is: {}".format(host, e))
         # in case of error provide empty value
         host_fqdn = ''

docs/src/man1/cdist.rst

@@ -50,12 +50,16 @@ All commands accept the following options:
 
     Set log level to debug (deprecated, use -vvv instead)
 
+.. option:: -q, --quiet
+
+    Quiet mode: disables logging, including WARNING and ERROR
+
 .. option:: -v, --verbose
 
     Increase the verbosity level. Every instance of -v increments the verbosity
-    level by one. Its default value is 0. There are 4 levels of verbosity. The
-    order of levels from the lowest to the highest are: ERROR (0), WARNING (1),
-    INFO (2) and DEBUG (3 or higher).
+    level by one. Its default value is 0 which includes ERROR and WARNING levels.
+    The levels, in order from the lowest to the highest, are: 
+    ERROR (-1), WARNING (0), INFO (1), VERBOSE (2), DEBUG (3) TRACE (4 or higher).
 
 .. option:: -V, --version
 

scripts/cdist

@@ -80,10 +80,7 @@ if __name__ == "__main__":
         import os
         import re
         import cdist
-        import cdist.log
 
-        logging.setLoggerClass(cdist.log.Log)
-        logging.basicConfig(format='%(levelname)s: %(message)s')
         log = logging.getLogger("cdist")
 
         if re.match("__", os.path.basename(sys.argv[0])):