scripts/lib/argparse_oe: show self.prog in the error message

This aligns our subclassed error() with that in the original class, using
_print_message and self.prog. Also add a docstring based on the original.

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/lib/argparse_oe.py b/scripts/lib/argparse_oe.py
index bf3ebaddfd9b244acfa319c1bcf8e8896ff34704..95b42e75ead06bd64c02018f7e32a4a1d9dffc98 100644 (file)
--- a/scripts/lib/argparse_oe.py
+++ b/scripts/lib/argparse_oe.py
@@ -16,8 +16,13 @@ class ArgumentParser(argparse.ArgumentParser):
         super(ArgumentParser, self).__init__(*args, **kwargs)
 
     def error(self, message):
-        sys.stderr.write('ERROR: %s\n' % message)
-        self.print_help()
+        """error(message: string)
+
+        Prints a help message incorporating the message to stderr and
+        exits.
+        """
+        self._print_message('%s: error: %s\n' % (self.prog, message), sys.stderr)
+        self.print_help(sys.stderr)
         sys.exit(2)
 
     def error_subcommand(self, message, subcommand):