Beispiel #1
0
    def __init__(self, e):  # type: (CalledProcessError) -> None
        message = "Command {} errored with the following output: \n{}".format(
            e.cmd, decode(e.output))

        super(VenvCommandError, self).__init__(message)
Beispiel #2
0
def test_complete():
    module_path = fixtures_dir / "complete"
    builder = CompleteBuilder(Factory().create_poetry(module_path),
                              NullEnv(execute=True), NullIO())
    builder.build()

    whl = module_path / "dist" / "my_package-1.2.3-py3-none-any.whl"

    assert whl.exists()
    if sys.platform != "win32":
        assert (os.stat(str(whl)).st_mode & 0o777) == 0o644

    zip = zipfile.ZipFile(str(whl))

    try:
        assert "my_package/sub_pgk1/extra_file.xml" not in zip.namelist()

        entry_points = zip.read("my_package-1.2.3.dist-info/entry_points.txt")

        assert (decode(entry_points.decode()) == """\
[console_scripts]
extra-script=my_package.extra:main[time]
my-2nd-script=my_package:main2
my-script=my_package:main

""")
        wheel_data = decode(zip.read("my_package-1.2.3.dist-info/WHEEL"))

        assert (wheel_data == """\
Wheel-Version: 1.0
Generator: poetry {}
Root-Is-Purelib: true
Tag: py3-none-any
""".format(__version__))
        wheel_data = decode(zip.read("my_package-1.2.3.dist-info/METADATA"))

        assert (wheel_data == """\
Metadata-Version: 2.1
Name: my-package
Version: 1.2.3
Summary: Some description.
Home-page: https://poetry.eustace.io/
License: MIT
Keywords: packaging,dependency,poetry
Author: Sébastien Eustace
Author-email: [email protected]
Maintainer: People Everywhere
Maintainer-email: [email protected]
Requires-Python: >=3.6,<4.0
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Topic :: Software Development :: Build Tools
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Provides-Extra: time
Requires-Dist: cachy[msgpack] (>=0.2.0,<0.3.0)
Requires-Dist: cleo (>=0.6,<0.7)
Requires-Dist: pendulum (>=1.4,<2.0); (python_version ~= "2.7" and sys_platform == "win32" or python_version in "3.4 3.5") and (extra == "time")
Project-URL: Documentation, https://poetry.eustace.io/docs
Project-URL: Issue Tracker, https://github.com/sdispater/poetry/issues
Project-URL: Repository, https://github.com/sdispater/poetry
Description-Content-Type: text/x-rst

My Package
==========

""")
    finally:
        zip.close()
Beispiel #3
0
    def create_venv(self,
                    io,
                    name=None,
                    executable=None,
                    force=False
                    ):  # type: (IO, Optional[str], Optional[str], bool) -> Env
        if self._env is not None and not force:
            return self._env

        cwd = self._poetry.file.parent
        env = self.get(reload=True)

        if not env.is_sane():
            force = True

        if env.is_venv() and not force:
            # Already inside a virtualenv.
            return env

        create_venv = self._poetry.config.get("virtualenvs.create")
        root_venv = self._poetry.config.get("virtualenvs.in-project")

        venv_path = self._poetry.config.get("virtualenvs.path")
        if root_venv:
            venv_path = cwd / ".venv"
        elif venv_path is None:
            venv_path = Path(CACHE_DIR) / "virtualenvs"
        else:
            venv_path = Path(venv_path)

        if not name:
            name = self._poetry.package.name

        python_patch = ".".join([str(v) for v in sys.version_info[:3]])
        python_minor = ".".join([str(v) for v in sys.version_info[:2]])
        if executable:
            python_patch = decode(
                subprocess.check_output(
                    list_to_shell_command([
                        executable,
                        "-c",
                        "\"import sys; print('.'.join([str(s) for s in sys.version_info[:3]]))\"",
                    ]),
                    shell=True,
                ).strip())
            python_minor = ".".join(python_patch.split(".")[:2])

        supported_python = self._poetry.package.python_constraint
        if not supported_python.allows(Version.parse(python_patch)):
            # The currently activated or chosen Python version
            # is not compatible with the Python constraint specified
            # for the project.
            # If an executable has been specified, we stop there
            # and notify the user of the incompatibility.
            # Otherwise, we try to find a compatible Python version.
            if executable:
                raise NoCompatiblePythonVersionFound(
                    self._poetry.package.python_versions, python_patch)

            io.write_line(
                "<warning>The currently activated Python version {} "
                "is not supported by the project ({}).\n"
                "Trying to find and use a compatible version.</warning> ".
                format(python_patch, self._poetry.package.python_versions))

            for python_to_try in reversed(
                    sorted(
                        self._poetry.package.AVAILABLE_PYTHONS,
                        key=lambda v: (v.startswith("3"), -len(v), v),
                    )):
                if len(python_to_try) == 1:
                    if not parse_constraint("^{}.0".format(
                            python_to_try)).allows_any(supported_python):
                        continue
                elif not supported_python.allows_all(
                        parse_constraint(python_to_try + ".*")):
                    continue

                python = "python" + python_to_try

                if io.is_debug():
                    io.write_line("<debug>Trying {}</debug>".format(python))

                try:
                    python_patch = decode(
                        subprocess.check_output(
                            list_to_shell_command([
                                python,
                                "-c",
                                "\"import sys; print('.'.join([str(s) for s in sys.version_info[:3]]))\"",
                            ]),
                            stderr=subprocess.STDOUT,
                            shell=True,
                        ).strip())
                except CalledProcessError:
                    continue

                if not python_patch:
                    continue

                if supported_python.allows(Version.parse(python_patch)):
                    io.write_line("Using <c1>{}</c1> ({})".format(
                        python, python_patch))
                    executable = python
                    python_minor = ".".join(python_patch.split(".")[:2])
                    break

            if not executable:
                raise NoCompatiblePythonVersionFound(
                    self._poetry.package.python_versions)

        if root_venv:
            venv = venv_path
        else:
            name = self.generate_env_name(name, str(cwd))
            name = "{}-py{}".format(name, python_minor.strip())
            venv = venv_path / name

        if not venv.exists():
            if create_venv is False:
                io.write_line("<fg=black;bg=yellow>"
                              "Skipping virtualenv creation, "
                              "as specified in config file."
                              "</>")

                return SystemEnv(Path(sys.prefix))

            io.write_line("Creating virtualenv <c1>{}</> in {}".format(
                name, str(venv_path)))

            self.build_venv(
                venv,
                executable=executable,
                flags=self._poetry.config.get("virtualenvs.options"),
            )
        else:
            if force:
                if not env.is_sane():
                    io.write_line(
                        "<warning>The virtual environment found in {} seems to be broken.</warning>"
                        .format(env.path))
                io.write_line("Recreating virtualenv <c1>{}</> in {}".format(
                    name, str(venv)))
                self.remove_venv(venv)
                self.build_venv(
                    venv,
                    executable=executable,
                    flags=self._poetry.config.get("virtualenvs.options"),
                )
            elif io.is_very_verbose():
                io.write_line(
                    "Virtualenv <c1>{}</> already exists.".format(name))

        # venv detection:
        # stdlib venv may symlink sys.executable, so we can't use realpath.
        # but others can symlink *to* the venv Python,
        # so we can't just use sys.executable.
        # So we just check every item in the symlink tree (generally <= 3)
        p = os.path.normcase(sys.executable)
        paths = [p]
        while os.path.islink(p):
            p = os.path.normcase(
                os.path.join(os.path.dirname(p), os.readlink(p)))
            paths.append(p)

        p_venv = os.path.normcase(str(venv))
        if any(p.startswith(p_venv) for p in paths):
            # Running properly in the virtualenv, don't need to do anything
            return SystemEnv(Path(sys.prefix), self.get_base_prefix())

        return VirtualEnv(venv)
Beispiel #4
0
 def _write_metadata_file(self, fp):
     """
     Write out metadata in the 2.x format (email like)
     """
     fp.write(decode(self.get_metadata_content()))
Beispiel #5
0
    def activate(self, python, io):  # type: (str, IO) -> Env
        venv_path = self._poetry.config.get("virtualenvs.path")
        if venv_path is None:
            venv_path = Path(CACHE_DIR) / "virtualenvs"
        else:
            venv_path = Path(venv_path)

        cwd = self._poetry.file.parent

        envs_file = TOMLFile(venv_path / self.ENVS_FILE)

        try:
            python_version = Version.parse(python)
            python = "python{}".format(python_version.major)
            if python_version.precision > 1:
                python += ".{}".format(python_version.minor)
        except ValueError:
            # Executable in PATH or full executable path
            pass

        try:
            python_version = decode(
                subprocess.check_output(
                    list_to_shell_command([
                        python,
                        "-c",
                        "\"import sys; print('.'.join([str(s) for s in sys.version_info[:3]]))\"",
                    ]),
                    shell=True,
                ))
        except CalledProcessError as e:
            raise EnvCommandError(e)

        python_version = Version.parse(python_version.strip())
        minor = "{}.{}".format(python_version.major, python_version.minor)
        patch = python_version.text

        create = False
        is_root_venv = self._poetry.config.get("virtualenvs.in-project")
        # If we are required to create the virtual environment in the root folder,
        # create or recreate it if needed
        if is_root_venv:
            create = False
            venv = self._poetry.file.parent / ".venv"
            if venv.exists():
                # We need to check if the patch version is correct
                _venv = VirtualEnv(venv)
                current_patch = ".".join(
                    str(v) for v in _venv.version_info[:3])

                if patch != current_patch:
                    create = True

            self.create_venv(io, executable=python, force=create)

            return self.get(reload=True)

        envs = tomlkit.document()
        base_env_name = self.generate_env_name(self._poetry.package.name,
                                               str(cwd))
        if envs_file.exists():
            envs = envs_file.read()
            current_env = envs.get(base_env_name)
            if current_env is not None:
                current_minor = current_env["minor"]
                current_patch = current_env["patch"]

                if current_minor == minor and current_patch != patch:
                    # We need to recreate
                    create = True

        name = "{}-py{}".format(base_env_name, minor)
        venv = venv_path / name

        # Create if needed
        if not venv.exists() or venv.exists() and create:
            in_venv = os.environ.get("VIRTUAL_ENV") is not None
            if in_venv or not venv.exists():
                create = True

            if venv.exists():
                # We need to check if the patch version is correct
                _venv = VirtualEnv(venv)
                current_patch = ".".join(
                    str(v) for v in _venv.version_info[:3])

                if patch != current_patch:
                    create = True

            self.create_venv(io, executable=python, force=create)

        # Activate
        envs[base_env_name] = {"minor": minor, "patch": patch}
        envs_file.write(envs)

        return self.get(reload=True)
Beispiel #6
0
    def remove(self, python):  # type: (str) -> Env
        venv_path = self._poetry.config.get("virtualenvs.path")
        if venv_path is None:
            venv_path = Path(CACHE_DIR) / "virtualenvs"
        else:
            venv_path = Path(venv_path)

        cwd = self._poetry.file.parent
        envs_file = TOMLFile(venv_path / self.ENVS_FILE)
        base_env_name = self.generate_env_name(self._poetry.package.name,
                                               str(cwd))

        if python.startswith(base_env_name):
            venvs = self.list()
            for venv in venvs:
                if venv.path.name == python:
                    # Exact virtualenv name
                    if not envs_file.exists():
                        self.remove_venv(venv.path)

                        return venv

                    venv_minor = ".".join(
                        str(v) for v in venv.version_info[:2])
                    base_env_name = self.generate_env_name(cwd.name, str(cwd))
                    envs = envs_file.read()

                    current_env = envs.get(base_env_name)
                    if not current_env:
                        self.remove_venv(venv.path)

                        return venv

                    if current_env["minor"] == venv_minor:
                        del envs[base_env_name]
                        envs_file.write(envs)

                    self.remove_venv(venv.path)

                    return venv

            raise ValueError(
                '<warning>Environment "{}" does not exist.</warning>'.format(
                    python))

        try:
            python_version = Version.parse(python)
            python = "python{}".format(python_version.major)
            if python_version.precision > 1:
                python += ".{}".format(python_version.minor)
        except ValueError:
            # Executable in PATH or full executable path
            pass

        try:
            python_version = decode(
                subprocess.check_output(
                    list_to_shell_command([
                        python,
                        "-c",
                        "\"import sys; print('.'.join([str(s) for s in sys.version_info[:3]]))\"",
                    ]),
                    shell=True,
                ))
        except CalledProcessError as e:
            raise EnvCommandError(e)

        python_version = Version.parse(python_version.strip())
        minor = "{}.{}".format(python_version.major, python_version.minor)

        name = "{}-py{}".format(base_env_name, minor)
        venv = venv_path / name

        if not venv.exists():
            raise ValueError(
                '<warning>Environment "{}" does not exist.</warning>'.format(
                    name))

        if envs_file.exists():
            envs = envs_file.read()
            current_env = envs.get(base_env_name)
            if current_env is not None:
                current_minor = current_env["minor"]

                if current_minor == minor:
                    del envs[base_env_name]
                    envs_file.write(envs)

        self.remove_venv(venv)

        return VirtualEnv(venv)
Beispiel #7
0
def test_complete_no_vcs():
    # Copy the complete fixtures dir to a temporary directory
    module_path = fixtures_dir / "complete"
    temporary_dir = Path(tempfile.mkdtemp()) / "complete"

    shutil.copytree(module_path.as_posix(), temporary_dir.as_posix())

    builder = CompleteBuilder(Poetry.create(temporary_dir),
                              NullEnv(execute=True), NullIO())
    builder.build()

    whl = temporary_dir / "dist" / "my_package-1.2.3-py3-none-any.whl"

    assert whl.exists()

    zip = zipfile.ZipFile(str(whl))

    # Check the zipped file to be sure that included and excluded files are
    # correctly taken account of without vcs
    expected_name_list = [
        "my_package/__init__.py",
        "my_package/data1/test.json",
        "my_package/sub_pkg1/__init__.py",
        "my_package/sub_pkg2/__init__.py",
        "my_package/sub_pkg2/data2/data.json",
        "my_package-1.2.3.dist-info/entry_points.txt",
        "my_package-1.2.3.dist-info/LICENSE",
        "my_package-1.2.3.dist-info/WHEEL",
        "my_package-1.2.3.dist-info/METADATA",
        "my_package-1.2.3.dist-info/RECORD",
    ]

    assert sorted(zip.namelist()) == sorted(expected_name_list)

    try:
        entry_points = zip.read("my_package-1.2.3.dist-info/entry_points.txt")

        assert (decode(entry_points.decode()) == """\
[console_scripts]
extra-script=my_package.extra:main[time]
my-2nd-script=my_package:main2
my-script=my_package:main

""")
        wheel_data = decode(zip.read("my_package-1.2.3.dist-info/WHEEL"))

        assert (wheel_data == """\
Wheel-Version: 1.0
Generator: poetry {}
Root-Is-Purelib: true
Tag: py3-none-any
""".format(__version__))
        wheel_data = decode(zip.read("my_package-1.2.3.dist-info/METADATA"))

        assert (wheel_data == """\
Metadata-Version: 2.1
Name: my-package
Version: 1.2.3
Summary: Some description.
Home-page: https://poetry.eustace.io/
License: MIT
Keywords: packaging,dependency,poetry
Author: Sébastien Eustace
Author-email: [email protected]
Requires-Python: >=3.6,<4.0
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Topic :: Software Development :: Build Tools
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Provides-Extra: time
Requires-Dist: cachy[msgpack] (>=0.2.0,<0.3.0)
Requires-Dist: cleo (>=0.6,<0.7)
Requires-Dist: pendulum (>=1.4,<2.0); extra == "time"
Project-URL: Documentation, https://poetry.eustace.io/docs
Project-URL: Repository, https://github.com/sdispater/poetry
Description-Content-Type: text/x-rst

My Package
==========

""")
    finally:
        zip.close()
Beispiel #8
0
def demo_setup_complex_pep517_legacy(demo_setup_complex: Path) -> Path:
    pyproject_toml = demo_setup_complex / "pyproject.toml"
    pyproject_toml.write_text(
        decode("[build-system]\n"
               'requires = ["setuptools", "wheel"]'))
    yield demo_setup_complex
Beispiel #9
0
    def handle(self):
        from poetry.__version__ import __version__
        from poetry.repositories.pypi_repository import PyPiRepository
        from poetry.semver import Version
        from poetry.utils._compat import Path
        from poetry.utils._compat import decode

        current = Path(__file__)
        try:
            current.relative_to(self.home)
        except ValueError:
            raise RuntimeError(
                "Poetry was not installed with the recommended installer. "
                "Cannot update automatically."
            )

        version = self.argument("version")
        if not version:
            version = ">=" + __version__

        repo = PyPiRepository(fallback=False)
        packages = repo.find_packages(
            "poetry", version, allow_prereleases=self.option("preview")
        )
        if not packages:
            self.line("No release found for the specified version")
            return

        packages.sort(
            key=cmp_to_key(
                lambda x, y: 0
                if x.version == y.version
                else int(x.version < y.version or -1)
            )
        )

        release = None
        for package in packages:
            if package.is_prerelease():
                if self.option("preview"):
                    release = package

                    break

                continue

            release = package

            break

        if release is None:
            self.line("No new release found")
            return

        if release.version == Version.parse(__version__):
            self.line("You are using the latest version")
            return

        try:
            self.update(release)
        except subprocess.CalledProcessError as e:
            self.line("")
            self.output.block(
                [
                    "[CalledProcessError]",
                    "An error has occured: {}".format(str(e)),
                    decode(e.output),
                ],
                style="error",
            )

            return e.returncode
Beispiel #10
0
    def __init__(
        self,
        path,  # type: Path
        category="main",  # type: str
        optional=False,  # type: bool
        base=None,  # type: Path
        develop=False,  # type: bool
    ):
        from . import dependency_from_pep_508
        from .package import Package

        self._path = path
        self._base = base
        self._full_path = path
        self._develop = develop

        if self._base and not self._path.is_absolute():
            self._full_path = self._base / self._path

        if not self._full_path.exists():
            raise ValueError("Directory {} does not exist".format(self._path))

        if self._full_path.is_file():
            raise ValueError("{} is a file, expected a directory".format(self._path))

        # Checking content to dertermine actions
        setup = self._full_path / "setup.py"
        pyproject = TomlFile(self._full_path / "pyproject.toml")
        has_poetry = False
        if pyproject.exists():
            pyproject_content = pyproject.read()
            has_poetry = (
                "tool" in pyproject_content and "poetry" in pyproject_content["tool"]
            )

        if not setup.exists() and not has_poetry:
            raise ValueError(
                "Directory {} does not seem to be a Python package".format(
                    self._full_path
                )
            )

        if has_poetry:
            from poetry.masonry.builders import SdistBuilder
            from poetry.poetry import Poetry

            poetry = Poetry.create(self._full_path)
            builder = SdistBuilder(poetry, NullVenv(), NullIO())

            with setup.open("w") as f:
                f.write(decode(builder.build_setup()))

            package = poetry.package
            self._package = Package(package.pretty_name, package.version)
            self._package.requires += package.requires
            self._package.dev_requires += package.dev_requires
            self._package.python_versions = package.python_versions
            self._package.platform = package.platform
        else:
            # Execute egg_info
            current_dir = os.getcwd()
            os.chdir(str(self._full_path))

            try:
                cwd = base
                venv = Venv.create(NullIO(), cwd=cwd)
                venv.run("python", "setup.py", "egg_info")
            finally:
                os.chdir(current_dir)

            egg_info = list(self._full_path.glob("*.egg-info"))[0]

            meta = pkginfo.UnpackedSDist(str(egg_info))

            if meta.requires_dist:
                reqs = list(meta.requires_dist)
            else:
                reqs = []
                requires = egg_info / "requires.txt"
                if requires.exists():
                    with requires.open() as f:
                        reqs = parse_requires(f.read())

            package = Package(meta.name, meta.version)
            package.description = meta.summary

            for req in reqs:
                package.requires.append(dependency_from_pep_508(req))

            if meta.requires_python:
                package.python_versions = meta.requires_python

            if meta.platforms:
                platforms = [p for p in meta.platforms if p.lower() != "unknown"]
                if platforms:
                    package.platform = " || ".join(platforms)

            self._package = package

        self._package.source_type = "directory"
        self._package.source_url = self._path.as_posix()

        super(DirectoryDependency, self).__init__(
            self._package.name,
            self._package.version,
            category=category,
            optional=optional,
            allows_prereleases=True,
        )
Beispiel #11
0
def test_prepare_metadata_for_build_wheel():
    entry_points = """\
[console_scripts]
extra-script=my_package.extra:main[time]
my-2nd-script=my_package:main2
my-script=my_package:main

"""
    wheel_data = """\
Wheel-Version: 1.0
Generator: poetry {}
Root-Is-Purelib: true
Tag: py3-none-any
""".format(__version__)
    metadata = """\
Metadata-Version: 2.1
Name: my-package
Version: 1.2.3
Summary: Some description.
Home-page: https://poetry.eustace.io/
License: MIT
Keywords: packaging,dependency,poetry
Author: Sébastien Eustace
Author-email: [email protected]
Requires-Python: >=3.6,<4.0
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Topic :: Software Development :: Build Tools
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Provides-Extra: time
Requires-Dist: cachy[msgpack] (>=0.2.0,<0.3.0)
Requires-Dist: cleo (>=0.6,<0.7)
Requires-Dist: pendulum (>=1.4,<2.0); extra == "time"
Project-URL: Documentation, https://poetry.eustace.io/docs
Project-URL: Repository, https://github.com/sdispater/poetry
Description-Content-Type: text/x-rst

My Package
==========

"""
    with temporary_directory() as tmp_dir, cwd(
            os.path.join(fixtures, "complete")):
        dirname = api.prepare_metadata_for_build_wheel(tmp_dir)

        assert "my_package-1.2.3.dist-info" == dirname

        dist_info = Path(tmp_dir, dirname)

        assert (dist_info / "entry_points.txt").exists()
        assert (dist_info / "WHEEL").exists()
        assert (dist_info / "METADATA").exists()

        with (dist_info / "entry_points.txt").open() as f:
            assert entry_points == decode(f.read())

        with (dist_info / "WHEEL").open() as f:
            assert wheel_data == decode(f.read())

        with (dist_info / "METADATA").open() as f:
            assert metadata == decode(f.read())
Beispiel #12
0
 def run(self, *args):  # type: (...) -> str
     return decode(
         subprocess.check_output(["git"] + list(args), stderr=subprocess.STDOUT)
     )
Beispiel #13
0
    def __init__(
            self,
            path,  # type: Path
            category='main',  # type: str
            optional=False,  # type: bool
            base=None,  # type: Path
            develop=False  # type: bool
    ):
        from . import dependency_from_pep_508

        self._path = path
        self._base = base
        self._full_path = path
        self._develop = develop

        if self._base and not self._path.is_absolute():
            self._full_path = self._base / self._path

        if not self._full_path.exists():
            raise ValueError('Directory {} does not exist'.format(self._path))

        if self._full_path.is_file():
            raise ValueError('{} is a file, expected a directory'.format(
                self._path))

        # Checking content to dertermine actions
        setup = self._full_path / 'setup.py'
        pyproject = TomlFile(self._full_path / 'pyproject.toml')
        has_poetry = False
        if pyproject.exists():
            pyproject_content = pyproject.read(True)
            has_poetry = ('tool' in pyproject_content
                          and 'poetry' in pyproject_content['tool'])

        if not setup.exists() and not has_poetry:
            raise ValueError(
                'Directory {} does not seem to be a Python package'.format(
                    self._full_path))

        if has_poetry:
            from poetry.masonry.builders import SdistBuilder
            from poetry.poetry import Poetry

            poetry = Poetry.create(self._full_path)
            builder = SdistBuilder(poetry, NullVenv(), NullIO())

            with setup.open('w') as f:
                f.write(decode(builder.build_setup()))

            self._package = poetry.package
        else:
            from poetry.packages import Package
            # Execute egg_info
            current_dir = os.getcwd()
            os.chdir(str(self._full_path))

            try:
                cwd = base
                venv = Venv.create(NullIO(), cwd=cwd)
                venv.run('python', 'setup.py', 'egg_info')
            finally:
                os.chdir(current_dir)

            egg_info = list(self._full_path.glob('*.egg-info'))[0]

            meta = pkginfo.UnpackedSDist(str(egg_info))

            if meta.requires_dist:
                reqs = list(meta.requires_dist)
            else:
                reqs = []
                requires = egg_info / 'requires.txt'
                if requires.exists():
                    with requires.open() as f:
                        reqs = parse_requires(f.read())

            package = Package(meta.name, meta.version)
            package.description = meta.summary

            for req in reqs:
                package.requires.append(dependency_from_pep_508(req))

            if meta.requires_python:
                package.python_versions = meta.requires_python

            if meta.platforms:
                platforms = [
                    p for p in meta.platforms if p.lower() != 'unknown'
                ]
                if platforms:
                    package.platform = ' || '.join(platforms)

            self._package = package

        self._package.source_type = 'directory'
        self._package.source_reference = str(self._path)

        super(DirectoryDependency, self).__init__(self._package.name,
                                                  self._package.version,
                                                  category=category,
                                                  optional=optional,
                                                  allows_prereleases=True)