mirror of https://github.com/t1meshift/js.git
113 lines
3.0 KiB
Python
113 lines
3.0 KiB
Python
"""Pylint tells me this module should have a docstring.
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So here it is.
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"""
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import sys
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import argparse
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import logging
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import colorama
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import coloredlogs
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from jasminesnake import __version__, __snake__, LOG_LEVELS
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from .js_stream import JSBaseStream, JSStringStream, JSFileStream
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from .lex.ErrorListeners import LogErrorListener
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from ast import nodes, to_ascii_tree, from_parse_tree
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def create_argument_parser():
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_arg_parser = argparse.ArgumentParser(
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description="Jasmine Snake, another JS interpreter in Python",
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epilog="I hope you don't use it, **especially** in production.",
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)
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_arg_parser.add_argument("--snake", action="store_true", help="print a snake")
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_arg_parser.add_argument(
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"--verbose",
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"-v",
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action="count",
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default=0,
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help="be more verbose. up to 4 (-vvvv) could be handled, more are ignored",
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)
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_arg_parser.add_argument(
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"infile",
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type=str,
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help='JS input file. use "-" to read input from stdin.',
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nargs="?",
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)
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return _arg_parser
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def main():
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# Init colorama
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colorama.init()
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# Init logging
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log_level = min(args.verbose, 4) # Ignore verbosity values more than 4
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coloredlogs.install(
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level=LOG_LEVELS[log_level]["level"], fmt=LOG_LEVELS[log_level]["format"]
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)
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# Print the snake if an argument is present
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if args.snake:
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print(colorama.Style.DIM + __snake__ + colorama.Style.RESET_ALL)
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print(
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colorama.Fore.BLACK
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+ colorama.Back.YELLOW
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+ "Don't tread on me!"
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+ colorama.Back.RESET
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+ colorama.Fore.RESET
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)
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# Read JS code from file or stdin
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if args.infile is not None:
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stream: JSBaseStream
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if args.infile == "-":
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input_str = sys.stdin.read()
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stream = JSStringStream(input_str)
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else:
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stream = JSFileStream(args.infile, LogErrorListener())
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tree = stream.parse()
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ast_tree = from_parse_tree(tree)
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ascii_ast = to_ascii_tree(ast_tree)
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logging.info("Got an AST!\n%s", ascii_ast)
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# TODO: run logic
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sys.exit(0)
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print("Jasmine Snake v{version}".format(version=__version__))
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print(
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colorama.Fore.YELLOW
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+ "Notice that only single-line statements are supported."
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+ colorama.Fore.RESET
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)
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print()
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try:
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while True:
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input_str = input("> ")
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logging.debug("Got input %s", input_str)
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stream = JSStringStream(input_str, LogErrorListener())
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tree = stream.parse()
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logging.debug("Got tree %s", tree.toStringTree(stream.parser.ruleNames))
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ast_tree = from_parse_tree(tree)
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ascii_ast = to_ascii_tree(ast_tree)
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logging.info("Got an AST!")
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logging.info(ascii_ast)
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# TODO: run logic
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except EOFError:
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print("Ctrl-D received, shutting down...")
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sys.exit(0)
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if __name__ == "__main__":
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arg_parser = create_argument_parser()
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args = arg_parser.parse_args()
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main()
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