Added a --simple-output option

This option turns off fancy output options like colors or progress bars.

Address #649

overviewer.py

@@ -89,6 +89,8 @@ def main():
             help="Print less output. You can specify this option multiple times.")
     parser.add_option("-v", "--verbose", dest="verbose", action="count", default=0,
             help="Print more output. You can specify this option multiple times.")
+    parser.add_option("--simple-output", dest="simple", action="store_true", default=False,
+            help="Use a simple output format, with no colors or progress bars")
 
     # create a group for "plugin exes" (the concept of a plugin exe is only loosly defined at this point)
     exegroup = OptionGroup(parser, "Other Scripts",
@@ -114,7 +116,8 @@ def main():
 
     # re-configure the logger now that we've processed the command line options
     logger.configure(logging.INFO + 10*options.quiet - 10*options.verbose,
-                     options.verbose > 0)
+                     verbose=options.verbose > 0,
+                     simple=options.simple)
 
     ##########################################################################
     # This section of main() runs in response to any one-time options we have,

overviewer_core/logger.py

@@ -254,7 +254,7 @@ class ANSIColorFormatter(HighlightingFormatter):
             # No coloring if it's not to be highlighted or colored
             return logging.Formatter.format(self, record)
 
-def configure(loglevel=logging.INFO, verbose=False):
+def configure(loglevel=logging.INFO, verbose=False, simple=False):
     """Configures the root logger to our liking
 
     For a non-standard loglevel, pass in the level with which to configure the handler.
@@ -268,8 +268,10 @@ def configure(loglevel=logging.INFO, verbose=False):
     logger = logging.getLogger()
 
     outstream = sys.stdout
+    if simple:
+        formatter = DumbFormatter(verbose)
 
-    if platform.system() == 'Windows':
+    elif platform.system() == 'Windows':
         # Our custom output stream processor knows how to deal with select ANSI
         # color escape sequences
         outstream = WindowsOutputStream(outstream)

overviewer_core/settingsDefinition.py

@@ -97,7 +97,8 @@ processes = Setting(required=True, validator=int, default=-1)
 # ends up adding overhead and isn't worth it.
 memcached_host = Setting(required=False, validator=str, default=None)
 
-if platform.system() == 'Windows' or not sys.stdout.isatty():
+# TODO clean up this ugly in sys.argv hack
+if platform.system() == 'Windows' or not sys.stdout.isatty() or "--simple" in sys.argv:
     obs = LoggingObserver()
 else:
     obs = ProgressBarObserver(fd=sys.stdout)