view docs/test2rst.py @ 6023:6c67219ce779 stable

topic: don't cache topic of e.g. memctx in _topiccache (issue6500)

_topiccache exists to make us hit the storage less often when we want to look
at topics for any reason. It doesn't make much sense to cache something that is
memory-only and is cheap to access however. Caching things like that was also a
source of a bug where creating multiple memctx instances in one process would
cache topic of the first one and ignore actual content of .extra() of the
others. That was happening because the cache is keyed by .rev(), but all memctx
instances have the same .rev() = None.

#!/usr/bin/env python3

import argparse
import os
import re


ignored_patterns = [
    re.compile(r'^#if'),
    re.compile(r'^#else'),
    re.compile(r'^#endif'),
    re.compile(r'#rest-ignore$'),
]


def rstify(orig):
    """Take contents of a .t file and produce reStructuredText"""
    newlines = []

    code_block_mode = False
    sphinx_directive_mode = False

    for line in orig.splitlines():

        # Empty lines doesn't change output
        if not line:
            newlines.append(line)
            code_block_mode = False
            sphinx_directive_mode = False
            continue

        ignored = False
        for pattern in ignored_patterns:
            if pattern.search(line):
                ignored = True
                break
        if ignored:
            continue

        # Sphinx directives mode
        if line.startswith('  .. '):

            # Insert a empty line to makes sphinx happy
            newlines.append("")

            # And unindent the directive
            line = line[2:]
            sphinx_directive_mode = True

        # Code mode
        codeline = line.startswith('  ')
        if codeline and not sphinx_directive_mode:
            if code_block_mode is False:
                newlines.extend(['::', ''])

            code_block_mode = True

        newlines.append(line)

    return "\n".join(newlines)


def main():
    ap = argparse.ArgumentParser()
    ap.add_argument('testfile', help='.t file to transform')

    opts = ap.parse_args()

    with open(opts.testfile) as f:
        content = f.read()
    rst = rstify(content)
    target = os.path.splitext(opts.testfile)[0] + '.rst'
    with open(target, 'w') as f:
        f.write(rst)


if __name__ == '__main__':
    main()