ctags for TorqueScript

import os

def generate_tags():
    script_files = []
    tags = []

    import re
    regular_expressions = (
        (re.compile(r'^s*functions+w+::(?P<tag>w+)s*(.*$'), 'm'), #method
        (re.compile(r'^s*functions+(?P<tag>w+)s*(.*$'), 'f'), #function
        (re.compile(r'^s*$(w+::)*(?P<tag>w+)s*=s.*;$'), 'g'), #global
        (re.compile(r'^s*news+w+s*(s*(?P<tag>w+)s*).*$'), 'o'), #object instance
        (re.compile(r'^s*(super)?classs*=s*"(?P<tag>w+)"s*;$', re.IGNORECASE), 'c'), #class type
    )
    for root, dirs, files in os.walk('.'):
        script_files.extend([root + '/' + x for x in files if valid_fileformat(x)])

    for filename in script_files:
        file = open(filename)
        for line in file:
            for re in regular_expressions:
                re_obj = re[0].match(line)
                if re_obj:
                    tags.append(
                        (re_obj.group('tag'), filename, '/^%s$/;"t%s'
                            % (line[:-1], re[1])
                        )
                    )
                    break

    tags.sort()
    tag_file = open('tags', 'w')
    tag_file.writelines(
        ['%st%st%sn' % (tag[0], tag[1], tag[2]) for tag in tags]
    )
    tag_file.close()


def valid_fileformat(filename):
    file_formats = ('gui', 'cs', 'mis')

    for file_format in file_formats:
        if filename.endswith('.%s' % file_format):
            return True

    return False

if __name__ == "__main__":
    generate_tags()