yt-dlc/devscripts/make_readme.py

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from __future__ import unicode_literals
import io
import sys
import re
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README_FILE = 'README.md'
helptext = sys.stdin.read()
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if isinstance(helptext, bytes):
helptext = helptext.decode('utf-8')
with io.open(README_FILE, encoding='utf-8') as f:
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oldreadme = f.read()
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header = oldreadme[:oldreadme.index('## General Options:')]
footer = oldreadme[oldreadme.index('# CONFIGURATION'):]
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options = helptext[helptext.index(' General Options:'):]
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options = re.sub(r'(?m)^ (\w.+)$', r'## \1', options)
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options = options + '\n'
with io.open(README_FILE, 'w', encoding='utf-8') as f:
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f.write(header)
f.write(options)
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f.write(footer)