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#!/usr/bin/env python3
"""
hypervideo --help | make_readme.py
This must be run in a console of correct width
"""
# Allow direct execution
import os
import sys
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import functools
import re
from devscripts.utils import read_file, write_file
README_FILE = 'README.md'
OPTIONS_START = 'General Options:'
OPTIONS_END = 'CONFIGURATION'
EPILOG_START = 'See full documentation'
ALLOWED_OVERSHOOT = 2
DISABLE_PATCH = object()
def take_section(text, start=None, end=None, *, shift=0):
return text[
text.index(start) + shift if start else None:
text.index(end) + shift if end else None
]
def apply_patch(text, patch):
return text if patch[0] is DISABLE_PATCH else re.sub(*patch, text)
options = take_section(sys.stdin.read(), f'\n {OPTIONS_START}', f'\n{EPILOG_START}', shift=1)
max_width = max(map(len, options.split('\n')))
switch_col_width = len(re.search(r'(?m)^\s{5,}', options).group())
delim = f'\n{" " * switch_col_width}'
PATCHES = (
( # Standardize `--update` message
r'(?m)^( -U, --update\s+).+(\n \s.+)*$',
r'\1Update this program to the latest version',
),
( # Headings
r'(?m)^ (\w.+\n)( (?=\w))?',
r'## \1'
),
( # Fixup `--date` formatting
rf'(?m)( --date DATE.+({delim}[^\[]+)*)\[.+({delim}.+)*$',
(rf'\1[now|today|yesterday][-N[day|week|month|year]].{delim}'
f'E.g. "--date today-2weeks" downloads only{delim}'
'videos uploaded on the same day two weeks ago'),
),
( # Do not split URLs
rf'({delim[:-1]})? (?P<label>\[\S+\] )?(?P<url>https?({delim})?:({delim})?/({delim})?/(({delim})?\S+)+)\s',
lambda mobj: ''.join((delim, mobj.group('label') or '', re.sub(r'\s+', '', mobj.group('url')), '\n'))
),
( # Do not split "words"
rf'(?m)({delim}\S+)+$',
lambda mobj: ''.join((delim, mobj.group(0).replace(delim, '')))
),
( # Allow overshooting last line
rf'(?m)^(?P<prev>.+)${delim}(?P<current>.+)$(?!{delim})',
lambda mobj: (mobj.group().replace(delim, ' ')
if len(mobj.group()) - len(delim) + 1 <= max_width + ALLOWED_OVERSHOOT
else mobj.group())
),
( # Avoid newline when a space is available b/w switch and description
DISABLE_PATCH, # This creates issues with prepare_manpage
r'(?m)^(\s{4}-.{%d})(%s)' % (switch_col_width - 6, delim),
r'\1 '
),
( # Replace brackets with a Markdown link
r'SponsorBlock API \((http.+)\)',
r'[SponsorBlock API](\1)'
),
)
readme = read_file(README_FILE)
write_file(README_FILE, ''.join((
take_section(readme, end=f'## {OPTIONS_START}'),
functools.reduce(apply_patch, PATCHES, options),
take_section(readme, f'# {OPTIONS_END}'),
)))
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