#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2018-2020 Chris Lamb <lamby@debian.org>
#
# diffoscope 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 3 of the License, or
# (at your option) any later version.
#
# diffoscope 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 diffoscope.  If not, see <https://www.gnu.org/licenses/>.

import re

from diffoscope.tools import tool_required
from diffoscope.difference import Difference

from .utils.file import File
from .utils.command import Command


class Ocamlobjinfo(Command):
    @tool_required("ocamlobjinfo")
    def cmdline(self):
        return ("ocamlobjinfo", self.path)

    def filter(self, line):
        val = line.decode("utf-8")
        if val.startswith("File "):
            return b""
        return line


class OcamlInterfaceFile(File):
    DESCRIPTION = "OCaml interface files"
    FILE_TYPE_RE = re.compile(r"^OCaml interface file ")

    def compare_details(self, other, source=None):
        return [
            Difference.from_operation(
                Ocamlobjinfo, self.path, other.path, source="ocamlobjinfo"
            )
        ]
