gmantelet/python-lyth

"""
Module that contains the command line application.
"""
import sys
import traceback

from lyth.compiler.analyzer import Analyzer
from lyth.compiler.error import LythSyntaxError
# from lyth.compiler.interpreter import Interpreter
from lyth.compiler.lexer import Lexer
from lyth.compiler.parser import Parser
from lyth.compiler.scanner import Scanner
from lyth.usage import fetch


def main(argv=sys.argv):
    """
    The main entry point of the application.
    """
    settings = fetch(argv[1:])
    error = 0

    # interpreter = Interpreter()

    count = 0

    while count <= settings.cycle:
        try:
            source = input('>>> ')
            if source.rstrip() and source.rstrip()[-1] == ':':
                while True:
                    line = input('... ')
                    source += '\n' + line
                    if not line or len(line) - len(line.lstrip()) == 0:
                        break

            scanner = Scanner(source + "\n")
            parser = Parser(Lexer(scanner))
            analyzer = Analyzer(parser)

            cmd = next(parser)
            # print(interpreter.visit(cmd))

            ret = analyzer.visit(cmd)
            if ret:
                print(ret)

        except LythSyntaxError as e:
            print(e)

        except KeyboardInterrupt:
            print("Keyboard interrupt")
            break

        except Exception:
            exc_type, exc_value, exc_tb = sys.exc_info()
            traceback.print_exception(exc_type, exc_value, exc_tb)
            error = 1
            break

        if settings.cycle:
            count += 1

    print("Goodbye.")
    return error