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    <p>In response to sigjuice's request in the comments, I'm posting my script solution. It isn't 100% bullet proof, and I'll probably use <code>filterdiff</code> instead.</p> <pre><code>base_usage_str=r''' python %prog index_regex patch_file description: Extracts all indices from a patch-file matching 'index_regex' e.g. python %prog '^evc_lib' p.patch &gt; evc_lib_p.patch Will extract all indices which begin with evc_lib. -or- python %prog '^(?!evc_lib)' p.patch &gt; not_evc_lib_p.patch Will extract all indices which do *not* begin with evc_lib. authors: Ross Rogers, 2009.04.02 ''' import re,os,sys from optparse import OptionParser def main(): parser = OptionParser(usage=base_usage_str) (options, args) = parser.parse_args(args=sys.argv[1:]) if len(args) != 2: parser.print_help() if len(args) == 0: sys.exit(0) else: sys.exit(1) (index_regex,patch_file) = args sys.stderr.write('Extracting patches for indices found by regex:%s\n'%index_regex) #print 'user_regex',index_regex user_index_match_regex = re.compile(index_regex) # Index: verification/ring_td_cte/tests/mmio_wr_td_target.e # --- sw/cfg/foo.xml 2009-04-30 17:59:11 -07:00 # +++ sw/cfg/foo.xml 2009-05-11 09:26:58 -07:00 index_cre = re.compile(r'''(?:(?&lt;=^)|(?&lt;=\n))(--- (?:.*\n){2,}?(?![ @\+\-]))''') patch_file = open(patch_file,'r') all_patch_sets = index_cre.findall(patch_file.read()) patch_file.close() for file_edit in all_patch_sets: # extract index subset index_path = re.compile('\+\+\+ (?P&lt;index&gt;[\w_\-/\.]+)').search(file_edit).group('index').strip() if user_index_match_regex.search(index_path): sys.stderr.write("Index regex matched index: "+index_path+"\n") print file_edit, if __name__ == '__main__': main() </code></pre>
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    1. POHow does one extract a unified-diff style patch subset?
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    1. USRoss Rogers
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