__main__.py

#!/usr/bin/env python3

"""Coco.py -- the Compiler Driver"""

__copyright__ = """
Compiler Generator Coco/R,
Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz
extended by M. Loeberbauer & A. Woess, Univ. of Linz
ported from Java to Python by Ronald Longo
improved and refactored by KOLANICH

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.

As an exception, it is allowed to write an extension of Coco/R that is used as a plugin in non-free software.

If not otherwise stated, any source code generated by Coco/R (other than Coco/R itself) does not fall under the GNU General Public License.
"""  # pylint: disable=duplicate-code


import sys
from pathlib import Path

import plumbum.cli

from .CLI import CocoArgs
from .controller import Controller
from .setupInfo import MetaData
from .utils import astIntoText

ROOT_DIR = Path(__file__).absolute().parent


class CocoCli(CocoArgs):
	if "version" in MetaData and "author" in MetaData and "author_email" in MetaData:
		DESCRIPTION = "Coco/R v%s for Python - Translated by %s (%s)\n" % (MetaData["version"], MetaData["author"], MetaData["author_email"])
	else:
		DESCRIPTION = "Coco/R v??? for Python - Translated by ??? (??)\nWE CANNOT RETRIEVE THE METADATA correctly, SOMETHING GONE WRONG, FIX IT: " + repr(MetaData)

	outputDir = plumbum.cli.SwitchAttr(("-O", "outputDir"), plumbum.cli.ExistingDirectory, default=False, help="Output files to that directory.")

	useAnnotatedAssignments = plumbum.cli.Flag(("useAnnotatedAssignments",), default=False, help="Use annotated assignments. This will make your code incompatible to python < 3.5. It is not recommended to enable it. When disabled, type comments - a backward-compatible mechanism is used.")

	def main(self, ATGName: plumbum.cli.ExistingFile):
		ATGName = Path(ATGName)
		dirName = ATGName.parent
		fileName = ATGName.name

		if not self.outputDir:
			self.outputDir = dirName

		self.outputDir = Path(self.outputDir)

		# Initialize the Scanner
		try:
			strVal = ATGName.read_text(encoding="utf-8")
		except IOError:
			raise RuntimeError('-- Compiler Error: Cannot open file "%s"' % ATGName)

		c = Controller()
		for key in c.table.ddt.__slots__:
			try:
				v = getattr(self, key)
			except AttributeError:
				continue
			setattr(c.table.ddt, key, v)

		c.parse(strVal)

		res = c.pipeline(useAnnotatedAssignments=self.useAnnotatedAssignments)

		sys.stdout.write(c.errors.Summarize(c.scanner.buffer))

		if res.parser:
			sys.stdout.write("parser")
			try:
				(self.outputDir / "Parser.py").write_text(astIntoText(res.parser))
			except BaseException as ex:
				print(ex)
				raise RuntimeError("-- Compiler Error: Cannot generate parser file.")

		if res.scanner:
			sys.stdout.write(" + scanner")
			try:
				(self.outputDir / "Scanner.py").write_text(astIntoText(res.scanner))
			except BaseException as ex:
				print(ex)
				raise RuntimeError("-- Compiler Error: Cannot generate scanner file.")

		sys.stdout.write(" generated\n")
		return 0


if __name__ == "__main__":
	CocoCli.run()