RequirementsCheckBear.py

import os

from coalib.bears.GlobalBear import GlobalBear
from coalib.results.Result import Result, RESULT_SEVERITY
from sarge import capture_both


class RequirementsCheckBear(GlobalBear):
    """
    The bear to check and find any conflicting dependencies.
    """
    LANGUAGES = {
        'Python Requirements',
        'Python 2 Requirements',
        'Python 3 Requirements',
    }
    REQUIREMENTS = {PipRequirement('pip-tools', '3.8.0')}
    AUTHORS = {'The coala developers'}
    AUTHORS_EMAILS = {'coala-devel@googlegroups.com'}
    LICENSE = 'AGPL-3.0'

    def run(self, req_files: tuple):
        """
        :param req_files:
            Tuple of requirements files.
        """
        data = ''
        orig_file = ''

        for req_file in req_files:
            if not os.path.isfile(req_file):
                raise ValueError('The file {} doesn\'t exist.'.format(req_file))

            with open(req_file) as req:
                cont = req.read()
                if not orig_file:
                    orig_file = cont
                else:
                    data += cont

        with open(req_files[0], 'a+') as temp_file:
            temp_file.write(data)

        out = capture_both('pip-compile {} -n --no-annotate --no-header '
                           '--no-index --allow-unsafe'.format(req_files[0]))

        if out.stderr.text and not out.stdout.text:
            yield Result(self,
                         message=out.stderr.text.split('\n')[0],
                         severity=RESULT_SEVERITY.MAJOR,
                         )

        with open(req_files[0], 'w+') as temp_file:
            temp_file.write(orig_file)