Report descending sort option

coverage/cmdline.py

@@ -85,6 +85,10 @@ class Opts(object):
             "which isn't done by default."
         ),
     )
+    sort = optparse.make_option(
+        '--sort', action='store', metavar='COLUMN',
+        help="Sort the report by the named column"
+    )
     show_missing = optparse.make_option(
         '-m', '--show-missing', action='store_true',
         help="Show line numbers of statements in each module that weren't executed.",
@@ -405,6 +409,7 @@ def get_prog_name(self):
             Opts.include,
             Opts.omit,
             Opts.precision,
+            Opts.sort,
             Opts.show_missing,
             Opts.skip_covered,
             Opts.skip_empty,
@@ -579,6 +584,7 @@ def command_line(self, argv):
             omit=omit,
             include=include,
             contexts=contexts,
+            sort=options.sort
             )
 
         # We need to be able to import from the current directory, because

coverage/config.py

@@ -211,6 +211,7 @@ def __init__(self):
         self.show_missing = False
         self.skip_covered = False
         self.skip_empty = False
+        self.sort = None
 
         # Defaults for [html]
         self.extra_css = None

coverage/control.py

@@ -831,7 +831,7 @@ def _get_file_reporters(self, morfs=None):
     def report(
         self, morfs=None, show_missing=None, ignore_errors=None,
         file=None, omit=None, include=None, skip_covered=None,
-        contexts=None, skip_empty=None, precision=None,
+        contexts=None, skip_empty=None, precision=None, sort=None
     ):
         """Write a textual summary report to `file`.
 
@@ -882,6 +882,7 @@ def report(
             ignore_errors=ignore_errors, report_omit=omit, report_include=include,
             show_missing=show_missing, skip_covered=skip_covered,
             report_contexts=contexts, skip_empty=skip_empty, precision=precision,
+            sort=sort
         ):
             reporter = SummaryReporter(self)
             return reporter.report(morfs, outfile=file)

coverage/summary.py

@@ -104,10 +104,21 @@ def report(self, morfs, outfile=None):
 
         # Sort the lines and write them out.
         if getattr(self.config, 'sort', None):
-            position = column_order.get(self.config.sort.lower())
+            _sort = self.config.sort.lower()
+            if _sort[0] == '-':
+                reverse = True
+                sort_option = _sort[1:]
+            elif _sort[0] == '+':
+                reverse = False
+                sort_option = _sort[1:]
+            else:
+                reverse = False
+                sort_option = _sort
+
+            position = column_order.get(sort_option)
             if position is None:
                 raise CoverageException("Invalid sorting option: {!r}".format(self.config.sort))
-            lines.sort(key=lambda l: (l[1][position], l[0]))
+            lines.sort(key=lambda l: (l[1][position], l[0]), reverse=reverse)
 
         for line in lines:
             self.writeout(line[0])