Format a given text file as Source Engine aliases.

cstext.py

import sys
import argparse


ALIAS_DECLARATION = "alias {script_name} {script_name}0"
ALIAS_PREFIX = "alias {script_name}{line_number} \""
ALIAS_SUFFIX = "alias {script_name} {script_name}{next_line_number}"


def main(argv):
    args = parse_args()
    script_name = args.input_file.name.split('.')[0]
    input_text = args.input_file.readlines()
    args.input_file.close()

    split_lines = [list(string_split_length(line.rstrip().replace('"', "''"), 127)) for line in input_text]
    processed_lines = []
    for line_number, split_line in enumerate(split_lines):
        line_prefix = ALIAS_PREFIX.format(
                script_name = script_name,
                line_number = line_number)
        line_content = '; '.join('say ' + part for part in split_line) + '"; '
        next_line_number = line_number + 1 if line_number < len(split_lines) - 1 else 0
        line_suffix = ALIAS_SUFFIX.format(
                script_name = script_name,
                next_line_number = next_line_number)
        processed_line = line_prefix + line_content + line_suffix
        processed_lines.append(processed_line)

    alias_declaration = ALIAS_DECLARATION.format(script_name = script_name)
    args.output_file.write(alias_declaration + "\n\n")
    for line in processed_lines:
        args.output_file.write(line + "\n")

    args.output_file.close()

    print("Done.\n")

    #print(repr(processed_lines))


def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('input_file', type=argparse.FileType('r'), help="The input file.")
    parser.add_argument('output_file', type=argparse.FileType('w'), help="The output file.")
    return parser.parse_args()


def string_split_length(string, length):
    return (string[0+i:length+i] for i in range(0, len(string), length))


if __name__ == "__main__":
    main(sys.argv)