def return_lexer()

in lib/pygments/mentos.py [0:0]

• 21 lines of code
• 10 McCabe index (conditional complexity)

    def return_lexer(self, lexer, args, inputs, code=None):
        """
        Accepting a variety of possible inputs, return a Lexer object.

        The inputs argument should be a hash with at least one of the following
        keys:

            - 'lexer' ("python")
            - 'mimetype' ("text/x-ruby")
            - 'filename' ("yeaaah.py")

        The code argument should be a string, such as "import derp".

        The code guessing method is not especially great. It is advised that
        clients pass in a literal lexer name whenever possible, which provides
        the best probability of match (100 percent).
        """

        if lexer:
            if inputs:
                return lexers.get_lexer_by_name(lexer, **inputs)
            else:
                return lexers.get_lexer_by_name(lexer)

        if inputs:
            if 'lexer' in inputs:
                return lexers.get_lexer_by_name(inputs['lexer'], **inputs)

            elif 'mimetype' in inputs:
                return lexers.get_lexer_for_mimetype(inputs['mimetype'], **inputs)

            elif 'filename' in inputs:
                name = inputs['filename']

                # If we have code and a filename, pygments allows us to guess
                # with both. This is better than just guessing with code.
                if code:
                    return lexers.guess_lexer_for_filename(name, code, **inputs)
                else:
                    return lexers.get_lexer_for_filename(name, **inputs)

        # If all we got is code, try anyway.
        if code:
            return lexers.guess_lexer(code, **inputs)

        else:
            return None