update-date.py 文件源码

def search_and_replace_date(lines, newdate):
    pattern = gpar.date_assign_re % gpar.datevar
    repl = gpar.date_repl_re % newdate
    log.debug('search_and_replace_date: pattern: %s', pattern)
    log.debug('search_and_replace_date: replace: %s', repl)
    for ln, line in enumerate(lines):
        newline, n = re.subn(pattern, repl, line)
        if n:
            if line != newline:
                # pattern matched and line changed
                log.debug('found pattern: %s', line[:-1])
                log.debug('  replacement: %s', newline[:-1])
                lines[ln] = newline
                return True
            else:
                # pattern matched, but not changed
                return False
    return False