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import textwrap

from pbr.tests import fixtures as pbr_fixtures
from pbr.tests.functional import base


class TestPEP517Support(base.BaseTestCase):
    def test_pep_517_support(self):
        # Note that the current PBR PEP517 entrypoints rely on a valid
        # PBR setup.py existing.
        pkgs = {
            'test_pep517': {
                'requirements.txt': textwrap.dedent(
                    """\
                        sphinx
                        iso8601
                    """
                ),
                # Override default setup.py to remove setup_requires.
                'setup.py': textwrap.dedent(
                    """\
                        #!/usr/bin/env python
                        import setuptools
                        setuptools.setup(pbr=True)
                    """
                ),
                'setup.cfg': textwrap.dedent(
                    """\
                        [metadata]
                        name = test_pep517
                        summary = A tiny test project
                        author = PBR Team
                        author_email = foo@example.com
                        home_page = https://example.com/
                        classifier =
                            Intended Audience :: Information Technology
                            Intended Audience :: System Administrators
                            License :: OSI Approved :: Apache Software License
                            Operating System :: POSIX :: Linux
                            Programming Language :: Python
                            Programming Language :: Python :: 2
                            Programming Language :: Python :: 2.7
                            Programming Language :: Python :: 3
                            Programming Language :: Python :: 3.6
                            Programming Language :: Python :: 3.7
                            Programming Language :: Python :: 3.8
                    """
                ),
                # note that we use 36.6.0 rather than 64.0.0 since the
                # latter doesn't support Python < 3.8 and we run our tests
                # against Python 2.7 still. That's okay since we're not
                # testing PEP-660 functionality here (which requires the
                # newer setuptools)
                'pyproject.toml': textwrap.dedent(
                    """\
                        [build-system]
                        requires = ["pbr", "setuptools>=36.6.0", "wheel"]
                        build-backend = "pbr.build"
                    """
                ),
            },
        }
        pkg_dirs = self.useFixture(pbr_fixtures.Packages(pkgs)).package_dirs
        pkg_dir = pkg_dirs['test_pep517']
        venv = self.useFixture(pbr_fixtures.Venv('PEP517'))

        # Test building sdists and wheels works. Note we do not use pip here
        # because pip will forcefully install the latest version of PBR on
        # pypi to satisfy the build-system requires. This means we can't self
        # test changes using pip. Build with --no-isolation appears to avoid
        # this problem.
        self._run_cmd(
            venv.python,
            ('-m', 'build', '--no-isolation', '.'),
            allow_fail=False,
            cwd=pkg_dir,
        )