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73 lines
2.0 KiB
Python
73 lines
2.0 KiB
Python
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#!/usr/bin/python
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import difflib
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import re
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import sys
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# Assume we only use the "== Section Name" section title syntax
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sectionheader_re = re.compile(r'^==+\s(.*)\s*$')
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# Assume we only use the "[[ItemName]]" anchor syntax
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anchor_re = re.compile(r'^\[\[([^]]+)\]\]')
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class Reader(object):
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def __init__(self):
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self.d = {}
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# Initial state is to gather section headers
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self.getline = self._getsec
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self.section = None
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def _getsec(self, line):
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"""Read a section header
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Prepare to gather anchors from subsequent lines. Don't change
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state if the line isn't a section header.
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"""
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m = sectionheader_re.match(line)
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if not m:
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return
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self.anchors = anchors = []
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self.d[m.group(1)] = anchors
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self.getline = self._getanchor
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def _getanchor(self, line):
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"""Read an anchor for an item definition
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Append the anchor names to the list of items in the current
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section.
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"""
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m = anchor_re.match(line)
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if not m:
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return self._getsec(line)
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self.anchors.append(m.group(1))
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def diffsort(self, key):
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"""Unified diff of unsorted and sorted item lists
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"""
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# Append newlines because difflib works better with them
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a = [s + '\n' for s in self.d[key]]
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b = sorted(a, key=str.lower)
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return difflib.unified_diff(a, b, fromfile=key+' unsorted',
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tofile=key+' sorted')
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def main():
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"""Diff unsorted and sorted lists of option names in a manpage
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Use the file named by the first argument, or standard input if
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there is none.
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"""
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try:
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fname = sys.argv[1]
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f = open(fname, 'r')
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except IndexError:
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f = sys.stdin
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reader = Reader()
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for line in f:
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reader.getline(line)
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for key in sorted(reader.d.keys(), key=str.lower):
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sys.stdout.writelines(reader.diffsort(key))
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if __name__ == '__main__':
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main()
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