tools/make-man-rules.py

   1 #!/usr/bin/env python3
   2 #  -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
   3 #  SPDX-License-Identifier: LGPL-2.1+
   4
   5 from __future__ import print_function
   6 import collections
   7 import sys
   8 import os.path
   9 import pprint
  10 from xml_helper import xml_parse
  11
  12 def man(page, number):
  13     return '{}.{}'.format(page, number)
  14
  15 def xml(file):
  16     return os.path.basename(file)
  17
  18 def add_rules(rules, name):
  19     xml = xml_parse(name)
  20     # print('parsing {}'.format(name), file=sys.stderr)
  21     if xml.getroot().tag != 'refentry':
  22         return
  23     conditional = xml.getroot().get('conditional') or ''
  24     rulegroup = rules[conditional]
  25     refmeta = xml.find('./refmeta')
  26     title = refmeta.find('./refentrytitle').text
  27     number = refmeta.find('./manvolnum').text
  28     refnames = xml.findall('./refnamediv/refname')
  29     target = man(refnames[0].text, number)
  30     if title != refnames[0].text:
  31         raise ValueError('refmeta and refnamediv disagree: ' + name)
  32     for refname in refnames:
  33         assert all(refname not in group
  34                    for group in rules.values()), "duplicate page name"
  35         alias = man(refname.text, number)
  36         rulegroup[alias] = target
  37         # print('{} => {} [{}]'.format(alias, target, conditional), file=sys.stderr)
  38
  39 def create_rules(xml_files):
  40     " {conditional => {alias-name => source-name}} "
  41     rules = collections.defaultdict(dict)
  42     for name in xml_files:
  43         try:
  44             add_rules(rules, name)
  45         except Exception:
  46             print("Failed to process", name, file=sys.stderr)
  47             raise
  48     return rules
  49
  50 def mjoin(files):
  51     return ' \\\n\t'.join(sorted(files) or '#')
  52
  53 MESON_HEADER = '''\
  54 # Do not edit. Generated by make-man-rules.py.
  55 manpages = ['''
  56
  57 MESON_FOOTER = '''\
  58 ]
  59 # Really, do not edit.'''
  60
  61 def make_mesonfile(rules, dist_files):
  62     # reformat rules as
  63     # grouped = [ [name, section, [alias...], condition], ...]
  64     #
  65     # but first create a dictionary like
  66     # lists = { (name, condition) => [alias...]
  67     grouped = collections.defaultdict(list)
  68     for condition, items in rules.items():
  69         for alias, name in items.items():
  70             group = grouped[(name, condition)]
  71             if name != alias:
  72                 group.append(alias)
  73
  74     lines = [ [p[0][:-2], p[0][-1], sorted(a[:-2] for a in aliases), p[1]]
  75               for p, aliases in sorted(grouped.items()) ]
  76     return '\n'.join((MESON_HEADER, pprint.pformat(lines)[1:-1], MESON_FOOTER))
  77
  78 if __name__ == '__main__':
  79     pages = sys.argv[1:]
  80
  81     rules = create_rules(pages)
  82     dist_files = (xml(file) for file in pages
  83                   if not file.endswith(".directives.xml") and
  84                      not file.endswith(".index.xml"))
  85     print(make_mesonfile(rules, dist_files))