chpathtool: clean up arg parsing to use proper argparse module
Also throw in some documentation for good measure since not everyone knows
what this thing does.
diff --git a/bin/chpathtool.py b/bin/chpathtool.py
index b8c6fd5..aa3b7d4 100755
--- a/bin/chpathtool.py
+++ b/bin/chpathtool.py
@@ -2,6 +2,10 @@
# Copyright 2011-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
+"""Helper tool for converting installed files to custom prefixes.
+
+In other words, eprefixy $D for Gentoo/Prefix."""
+
import io
import os
import stat
@@ -142,14 +146,16 @@
def main(argv):
- usage = '%(prog)s [options] <location> <old> <new>'
- parser = ArgumentParser(usage=usage)
- options, args = parser.parse_known_args(argv)
+ parser = ArgumentParser(description=__doc__)
+ parser.add_argument('location', default=None,
+ help='root directory (e.g. $D)')
+ parser.add_argument('old', default=None,
+ help='original build prefix (e.g. /)')
+ parser.add_argument('new', default=None,
+ help='new install prefix (e.g. $EPREFIX)')
+ opts = parser.parse_args(argv)
- if len(args) != 3:
- parser.error('3 args required, got %s' % (len(args),))
-
- location, old, new = args
+ location, old, new = opts.location, opts.old, opts.new
is_text_file = IsTextFile()
