Add `--ignore REGEXP` option to mkogg.py.

I store my music as FLAC files, but some of it originally came from
other file formats (e.g. purchased mp3s).  These non-FLAC originials
get stored in '.orig' subdirectories.  Now I can run:
  $ mkogg.py --ignore '.*/[.]orig/.*' ...
to avoid converting these originals.

diff --git a/posts/mkogg/mkogg.py b/posts/mkogg/mkogg.py
index 1c96d0a9e284ff6e0d71fa3c45c2e7e378301ae1..f5a10b03ef3988df828288be3e34fe57a0886c68 100755 (executable)
--- a/posts/mkogg/mkogg.py
+++ b/posts/mkogg/mkogg.py
@@ -45,6 +45,7 @@ External packages required for full functionality:
 from hashlib import sha256 as _hash
 import os
 import os.path
+import re as _re
 import shutil
 from subprocess import Popen, PIPE
 from tempfile import mkstemp
@@ -78,13 +79,14 @@ class Converter (object):
     .. _suggestions: http://www.xiph.org/vorbis/doc/v-comment.html
     """
     def __init__(self, source_dir, target_dir, target_extension='ogg',
-                 cache_file=None):
+                 cache_file=None, ignore_function=None):
         self.source_dir = source_dir
         self.target_dir = target_dir
         self._source_extensions = ['flac', 'mp3', 'ogg', 'wav']
         self._target_extension = target_extension
         self._cache_file = cache_file
         self._cache = self._read_cache()
+        self._ignore_function = ignore_function
         f,self._tempfile = mkstemp(prefix='mkogg-')
 
     def cleanup(self):
@@ -134,6 +136,9 @@ class Converter (object):
                     print 'skip', filename, ext
                     continue
                 source_path = os.path.join(dirpath, filename)
+                if (self._ignore_function is not None and
+                    self._ignore_function(source_path)):
+                    continue
                 rel_path = os.path.relpath(dirpath, self.source_dir)
                 target_path = os.path.join(
                     self.target_dir, rel_path,
@@ -469,6 +474,8 @@ if __name__ == '__main__':
     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('-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')
 
@@ -477,9 +484,15 @@ if __name__ == '__main__':
     if options.test:
         sys.exit(test())
 
+    if options.ignore is not None:
+        ignore_regexp = _re.compile(options.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)
+                  cache_file=options.cache, ignore_function=ignore_function)
     try:
         c.run()
     finally: