From: W. Trevor King <wking@tremily.us>
Date: Mon, 31 Dec 2012 12:06:20 +0000 (-0500)
Subject: mkogg.py: Upgrade from optparse to argparse
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=19119afac2000f4918c4a6caa4c633ab37d1f23c;p=blog.git

mkogg.py: Upgrade from optparse to argparse
---

diff --git a/posts/mkogg/mkogg.py b/posts/mkogg/mkogg.py
index 581631a..f2fc1f8 100755
--- a/posts/mkogg/mkogg.py
+++ b/posts/mkogg/mkogg.py
@@ -462,43 +462,62 @@ def test():
 
 
 if __name__ == '__main__':
-    import optparse
+    import argparse
     import sys
 
-    usage = '%prog [options] source-dir target-dir'
-    epilog = __doc__
-    p = optparse.OptionParser(usage=usage, epilog=epilog)
-    p.format_epilog = lambda formatter: epilog+'\n'
-    p.add_option('-t', '--target-extension', dest='ext',
-                 default='ogg', metavar='EXT',
-                 help='Conversion target type (e.g. flac, mp3) (%default)')
-    p.add_option('-c', '--cache', dest='cache', metavar='PATH',
-                 help=('Save conversion hashes in a cache file to avoid '
-                       'repeated previous conversions.'))
-    p.add_option('-n', '--no-hash', dest='hash', action='store_false',
-                 default=True,
-                 help=("Don't hash files.  Just assume matching names would "
-                       'have matching hashes.'))
-    p.add_option('-i', '--ignore', dest='ignore', metavar='REGEXP',
-                 help=('Ignore source paths matching REGEXP.'))
-    p.add_option('--test', dest='test', action='store_true', default=False,
-                 help='Run internal tests and exit')
-
-    options,args = p.parse_args()
-
-    if options.test:
+    class Formatter (argparse.RawDescriptionHelpFormatter,
+                     argparse.ArgumentDefaultsHelpFormatter):
+        pass
+
+    p = argparse.ArgumentParser(
+        description=__doc__.splitlines()[0],
+        epilog='\n'.join(__doc__.splitlines()[2:]),
+        formatter_class=Formatter)
+    p.add_argument(
+        '-v', '--version', action='version',
+        version='%(prog)s {}'.format(__version__))
+    p.add_argument(
+        '-t', '--target-extension', dest='ext', metavar='EXT',
+        default='ogg', choices=['flac', 'mp3', 'ogg', 'wav'],
+        help='Conversion target type')
+    p.add_argument(
+        '-c', '--cache', dest='cache', metavar='PATH',
+        help=('Save conversion hashes in a cache file to avoid '
+              'repeated previous conversions.'))
+    p.add_argument(
+        '-n', '--no-hash', dest='hash',
+        default=True, action='store_const', const=False,
+        help=("Don't hash files.  Just assume matching names would "
+              'have matching hashes.'))
+    p.add_argument(
+        '-i', '--ignore', dest='ignore', metavar='REGEXP',
+        help='Ignore source paths matching REGEXP.')
+    p.add_argument(
+        '--test', dest='test',
+        default=False, action='store_const', const=True,
+        help='Run internal tests and exit')
+    p.add_argument(
+        'source_dir', metavar='SOURCE', default='.',
+        help='Source directory')
+    p.add_argument(
+        'target_dir', metavar='TARGET', default='.',
+        help='Target directory')
+
+    args = p.parse_args()
+
+    if args.test:
         sys.exit(test())
 
-    if options.ignore is not None:
-        ignore_regexp = _re.compile(options.ignore)
+    if args.ignore:
+        ignore_regexp = _re.compile(args.ignore)
         ignore_function = ignore_regexp.match
     else:
         ignore_function = None
 
-    source_dir,target_dir = args
-    c = Converter(source_dir, target_dir, target_extension=options.ext,
-                  cache_file=options.cache, hash=options.hash,
-                  ignore_function=ignore_function)
+    c = Converter(
+        args.source_dir, args.target_dir, target_extension=args.ext,
+        cache_file=args.cache, hash=args.hash,
+        ignore_function=ignore_function)
     try:
         c.run()
     finally: