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#!/usr/bin/env python3
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"""
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Consistent formatting of rst section titles
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"""
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import re
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import subprocess
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spaces = [
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(0, 1), # we assume this is a over-and-underlined header
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(2, 1),
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(1, 1),
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(1, 0),
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(1, 0),
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]
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# http://sphinx-doc.org/rest.html :
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# for the Python documentation, this convention is used which you may follow:
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# # with overline, for parts
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# * with overline, for chapters
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# =, for sections
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# -, for subsections
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# ^, for subsubsections
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# ", for paragraphs
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pystyles = ['#', '*', '=', '-', '^', '"']
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# match on a header line underlined with one of the valid characters
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headermatch = re.compile(r'''\n*(.+)\n([][!"#$%&'()*+,./:;<=>?@\\^_`{|}~-])\2{2,}\n+''', flags=re.MULTILINE)
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def main():
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filenames = subprocess.check_output(['hg', 'files', 'set:**.rst+kallithea/i18n/how_to']).splitlines()
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for fn in filenames:
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fn = fn.decode()
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print('processing %s' % fn)
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s = open(fn).read()
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# find levels and their styles
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lastpos = 0
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styles = []
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for markup in headermatch.findall(s):
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style = markup[1]
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if style in styles:
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stylepos = styles.index(style)
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if stylepos > lastpos + 1:
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print('bad style %r with level %s - was at %s' % (style, stylepos, lastpos))
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else:
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stylepos = len(styles)
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if stylepos > lastpos + 1:
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print('bad new style %r - expected %r' % (style, styles[lastpos + 1]))
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else:
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styles.append(style)
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lastpos = stylepos
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# remove superfluous spacing (may however be restored by header spacing)
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s = re.sub(r'''(\n\n)\n*''', r'\1', s, flags=re.MULTILINE)
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if styles:
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newstyles = pystyles[pystyles.index(styles[0]):]
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def subf(m):
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title, style = m.groups()
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level = styles.index(style)
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before, after = spaces[level]
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newstyle = newstyles[level]
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return '\n' * (before + 1) + title + '\n' + newstyle * len(title) + '\n' * (after + 1)
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s = headermatch.sub(subf, s)
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# remove superfluous spacing when headers are adjacent
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s = re.sub(r'''(\n.+\n([][!"#$%&'()*+,./:;<=>?@\\^_`{|}~-])\2{2,}\n\n\n)\n*''', r'\1', s, flags=re.MULTILINE)
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# fix trailing space and spacing before link sections
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s = s.strip() + '\n'
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s = re.sub(r'''\n+((?:\.\. _[^\n]*\n)+)$''', r'\n\n\n\1', s)
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open(fn, 'w').write(s)
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print(subprocess.check_output(['hg', 'diff'] + filenames))
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if __name__ == '__main__':
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main()
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