mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-01-23 00:07:07 +03:00
86 lines
2.1 KiB
Python
86 lines
2.1 KiB
Python
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#!/usr/bin/env python3
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'''
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A utility script for generating documentation.
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Preprocessor macro output from opts_macro.h is parsed and combined with
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bcachefs.5.rst.tmpl to generate bcachefs.5.rst.
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>=python3.6
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'''
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import sys
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import re
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INDENT = ' '
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TEMPLATE = './doc/bcachefs.5.rst.tmpl'
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RST_FILE= './doc/bcachefs.5.rst'
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SANITIZE_CHARS = [
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'\\\\n',
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'\\n',
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' ',
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'"',
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'\\',
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]
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def sanitize(text):
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'''
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Parses opts_macro.h preprocessor output
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:param text: text to sanitize
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:type text: str
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:returns: a list of options
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:rtype: list
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'''
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args = []
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reg = re.search('FMT_START_SECTION(.*)FMT_END_SECTION', text,
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flags=re.DOTALL)
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if not reg:
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raise re.error('no text found')
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# decoding would probably be better, but this works
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for char in SANITIZE_CHARS:
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text = text.replace(char, '')
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text = re.split(r'FMT_END_LINE', text)
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# this seemed easier than getting preprocessor macros to play nice
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# with python's builtin csv module
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for line in text:
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vals = line.split(';')
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if not vals:
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continue
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if len(vals) != 4:
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continue
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vals = list(map(str.strip, vals))
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name, is_bool, desc, arg_name = vals
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# this macro value from opts.h indicates that no values are passed
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if is_bool == 'OPT_BOOL()':
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args.append(f'--{name}\n{INDENT}{desc}')
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else:
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args.append(f'--{name} <{arg_name}>\n{INDENT}{desc}')
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if not args:
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raise re.error('no args found, likely parsing error')
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return args
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def main():
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''' Transform stdin to option list and write templated output to new file '''
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out = ''
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stdin = sys.stdin.read()
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opts = sanitize(stdin)
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opts = '\n'.join(opts)
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# Insert into template
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with open(TEMPLATE, 'r') as in_handle:
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in_handle = in_handle.read()
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out = in_handle.replace('OPTIONS_TABLE', opts)
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with open(RST_FILE, 'w') as out_handle:
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out_handle.write(out)
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if __name__ == '__main__':
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main()
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