示例#1
0
def test_find_compatible_interpreters():
    py27 = ensure_python_interpreter(PY27)
    py35 = ensure_python_interpreter(PY35)
    py36 = ensure_python_interpreter(PY36)
    path = [py27, py35, py36]

    assert [py35, py36] == find_interpreters(path, '>3')
    assert [py27] == find_interpreters(path, '<3')

    assert [py36] == find_interpreters(path, '>{}'.format(PY35))
    assert [py35] == find_interpreters(path, '>{}, <{}'.format(PY27, PY36))
    assert [py36] == find_interpreters(path, '>=3.6')

    assert [] == find_interpreters(path, '<2')
    assert [] == find_interpreters(path, '>4')
    assert [] == find_interpreters(path, '>{}, <{}'.format(PY27, PY35))

    # All interpreters on PATH including whatever interpreter is currently running.
    all_known_interpreters = set(PythonInterpreter.all())
    all_known_interpreters.add(PythonInterpreter.get())

    interpreters = set(
        iter_compatible_interpreters(compatibility_constraints=['<3']))
    i_rendered = '\n      '.join(sorted(map(repr, interpreters)))
    aki_rendered = '\n      '.join(sorted(map(repr, all_known_interpreters)))
    assert interpreters.issubset(all_known_interpreters), dedent("""
    interpreters '<3':
      {interpreters}

    all known interpreters:
      {all_known_interpreters}
    """.format(interpreters=i_rendered, all_known_interpreters=aki_rendered))
示例#2
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def find_interpreters(path, valid_basenames=None, constraints=None):
    # type: (Iterable[str], Optional[Iterable[str]], Optional[Iterable[str]]) -> List[AnyStr]
    return [
        interp.binary
        for interp in iter_compatible_interpreters(
            path=os.pathsep.join(path),
            valid_basenames=valid_basenames,
            interpreter_constraints=constraints,
        )
    ]
示例#3
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def find_interpreters(
        path,  # type: Iterable[str]
        valid_basenames=None,  # type: Optional[Iterable[str]]
        constraints=None,  # type: Optional[Iterable[str]]
        preferred_interpreter=None,  # type: Optional[PythonInterpreter]
):
    # type: (...) -> List[str]
    return [
        interp.binary for interp in iter_compatible_interpreters(
            path=os.pathsep.join(path),
            valid_basenames=valid_basenames,
            interpreter_constraints=constraints,
            preferred_interpreter=preferred_interpreter,
        )
    ]
示例#4
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    def _find_interpreters(
            pex,  # type: PEX
            all=False,  # type: bool
    ):
        # type: (...) -> Iterator[PythonInterpreter]
        if not all:
            yield pex.interpreter
            return

        if ENV.PEX_PYTHON:
            logger.warning(
                "Ignoring PEX_PYTHON={} in order to scan for all compatible "
                "interpreters.".format(ENV.PEX_PYTHON))
        for interpreter in pex_bootstrapper.iter_compatible_interpreters(
                path=ENV.PEX_PYTHON_PATH,
                interpreter_constraints=pex.pex_info().interpreter_constraints,
        ):
            yield interpreter
示例#5
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def test_find_compatible_interpreters():
    # type: () -> None
    py27 = ensure_python_interpreter(PY27)
    py35 = ensure_python_interpreter(PY35)
    py36 = ensure_python_interpreter(PY36)
    path = [py27, py35, py36]

    assert [py35, py36] == find_interpreters(path, constraints=[">3"])
    assert [py27] == find_interpreters(path, constraints=["<3"])

    assert [py36] == find_interpreters(path, constraints=[">{}".format(PY35)])
    assert [py35
            ] == find_interpreters(path,
                                   constraints=[">{}, <{}".format(PY27, PY36)])
    assert [py36] == find_interpreters(path, constraints=[">=3.6"])

    with pytest.raises(UnsatisfiableInterpreterConstraintsError):
        find_interpreters(path, constraints=["<2"])

    with pytest.raises(UnsatisfiableInterpreterConstraintsError):
        find_interpreters(path, constraints=[">4"])

    with pytest.raises(UnsatisfiableInterpreterConstraintsError):
        find_interpreters(path, constraints=[">{}, <{}".format(PY27, PY35)])

    # All interpreters on PATH including whatever interpreter is currently running.
    all_known_interpreters = set(PythonInterpreter.all())
    all_known_interpreters.add(PythonInterpreter.get())

    interpreters = set(
        iter_compatible_interpreters(interpreter_constraints=["<3"]))
    i_rendered = "\n      ".join(sorted(map(repr, interpreters)))
    aki_rendered = "\n      ".join(sorted(map(repr, all_known_interpreters)))
    assert interpreters.issubset(all_known_interpreters), dedent("""
        interpreters '<3':
          {interpreters}
        
        all known interpreters:
          {all_known_interpreters}
        """.format(interpreters=i_rendered,
                   all_known_interpreters=aki_rendered))
示例#6
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def build_pex(reqs, options, cache=None):
    interpreters = None  # Default to the current interpreter.

    pex_python_path = options.python_path  # If None, this will result in using $PATH.
    # TODO(#1075): stop looking at PEX_PYTHON_PATH and solely consult the `--python-path` flag.
    if pex_python_path is None and (options.rc_file
                                    or not ENV.PEX_IGNORE_RCFILES):
        rc_variables = Variables(rc=options.rc_file)
        pex_python_path = rc_variables.PEX_PYTHON_PATH

    # NB: options.python and interpreter constraints cannot be used together.
    if options.python:
        with TRACER.timed("Resolving interpreters", V=2):

            def to_python_interpreter(full_path_or_basename):
                if os.path.isfile(full_path_or_basename):
                    return PythonInterpreter.from_binary(full_path_or_basename)
                else:
                    interp = PythonInterpreter.from_env(full_path_or_basename)
                    if interp is None:
                        die("Failed to find interpreter: %s" %
                            full_path_or_basename)
                    return interp

            interpreters = [
                to_python_interpreter(interp) for interp in options.python
            ]
    elif options.interpreter_constraint:
        with TRACER.timed("Resolving interpreters", V=2):
            constraints = options.interpreter_constraint
            validate_constraints(constraints)
            try:
                interpreters = list(
                    iter_compatible_interpreters(
                        path=pex_python_path,
                        interpreter_constraints=constraints))
            except UnsatisfiableInterpreterConstraintsError as e:
                die(
                    e.create_message(
                        "Could not find a compatible interpreter."),
                    CANNOT_SETUP_INTERPRETER,
                )

    platforms = OrderedSet(options.platforms)
    interpreters = interpreters or []
    if options.platforms and options.resolve_local_platforms:
        with TRACER.timed(
                "Searching for local interpreters matching {}".format(
                    ", ".join(map(str, platforms)))):
            candidate_interpreters = OrderedSet(
                iter_compatible_interpreters(path=pex_python_path))
            candidate_interpreters.add(PythonInterpreter.get())
            for candidate_interpreter in candidate_interpreters:
                resolved_platforms = candidate_interpreter.supported_platforms.intersection(
                    platforms)
                if resolved_platforms:
                    for resolved_platform in resolved_platforms:
                        TRACER.log("Resolved {} for platform {}".format(
                            candidate_interpreter, resolved_platform))
                        platforms.remove(resolved_platform)
                    interpreters.append(candidate_interpreter)
        if platforms:
            TRACER.log(
                "Could not resolve a local interpreter for {}, will resolve only binary distributions "
                "for {}.".format(
                    ", ".join(map(str, platforms)),
                    "this platform"
                    if len(platforms) == 1 else "these platforms",
                ))

    interpreter = (PythonInterpreter.latest_release_of_min_compatible_version(
        interpreters) if interpreters else None)

    try:
        with open(options.preamble_file) as preamble_fd:
            preamble = preamble_fd.read()
    except TypeError:
        # options.preamble_file is None
        preamble = None

    pex_builder = PEXBuilder(
        path=safe_mkdtemp(),
        interpreter=interpreter,
        preamble=preamble,
        copy_mode=CopyMode.SYMLINK,
        include_tools=options.include_tools or options.venv,
    )

    if options.resources_directory:
        pex_warnings.warn(
            "The `-R/--resources-directory` option is deprecated. Resources should be added via "
            "`-D/--sources-directory` instead.")

    for directory in OrderedSet(options.sources_directory +
                                options.resources_directory):
        src_dir = os.path.normpath(directory)
        for root, _, files in os.walk(src_dir):
            for f in files:
                src_file_path = os.path.join(root, f)
                dst_path = os.path.relpath(src_file_path, src_dir)
                pex_builder.add_source(src_file_path, dst_path)

    pex_info = pex_builder.info
    pex_info.zip_safe = options.zip_safe
    pex_info.unzip = options.unzip
    pex_info.venv = bool(options.venv)
    pex_info.venv_bin_path = options.venv
    pex_info.venv_copies = options.venv_copies
    pex_info.pex_path = options.pex_path
    pex_info.always_write_cache = options.always_write_cache
    pex_info.ignore_errors = options.ignore_errors
    pex_info.emit_warnings = options.emit_warnings
    pex_info.inherit_path = InheritPath.for_value(options.inherit_path)
    pex_info.pex_root = options.runtime_pex_root
    pex_info.strip_pex_env = options.strip_pex_env

    if options.interpreter_constraint:
        for ic in options.interpreter_constraint:
            pex_builder.add_interpreter_constraint(ic)

    indexes = compute_indexes(options)

    for requirements_pex in options.requirements_pexes:
        pex_builder.add_from_requirements_pex(requirements_pex)

    with TRACER.timed(
            "Resolving distributions ({})".format(reqs +
                                                  options.requirement_files)):
        if options.cache_ttl:
            pex_warnings.warn(
                "The --cache-ttl option is deprecated and no longer has any effect."
            )
        if options.headers:
            pex_warnings.warn(
                "The --header option is deprecated and no longer has any effect."
            )

        network_configuration = NetworkConfiguration(
            retries=options.retries,
            timeout=options.timeout,
            proxy=options.proxy,
            cert=options.cert,
            client_cert=options.client_cert,
        )

        try:
            if options.pex_repository:
                with TRACER.timed("Resolving requirements from PEX {}.".format(
                        options.pex_repository)):
                    resolveds = resolve_from_pex(
                        pex=options.pex_repository,
                        requirements=reqs,
                        requirement_files=options.requirement_files,
                        constraint_files=options.constraint_files,
                        network_configuration=network_configuration,
                        transitive=options.transitive,
                        interpreters=interpreters,
                        platforms=list(platforms),
                        manylinux=options.manylinux,
                        ignore_errors=options.ignore_errors,
                    )
            else:
                with TRACER.timed("Resolving requirements."):
                    resolveds = resolve_multi(
                        requirements=reqs,
                        requirement_files=options.requirement_files,
                        constraint_files=options.constraint_files,
                        allow_prereleases=options.allow_prereleases,
                        transitive=options.transitive,
                        interpreters=interpreters,
                        platforms=list(platforms),
                        indexes=indexes,
                        find_links=options.find_links,
                        resolver_version=ResolverVersion.for_value(
                            options.resolver_version),
                        network_configuration=network_configuration,
                        cache=cache,
                        build=options.build,
                        use_wheel=options.use_wheel,
                        compile=options.compile,
                        manylinux=options.manylinux,
                        max_parallel_jobs=options.max_parallel_jobs,
                        ignore_errors=options.ignore_errors,
                    )

            for resolved_dist in resolveds:
                pex_builder.add_distribution(resolved_dist.distribution)
                if resolved_dist.direct_requirement:
                    pex_builder.add_requirement(
                        resolved_dist.direct_requirement)
        except Unsatisfiable as e:
            die(str(e))

    if options.entry_point and options.script:
        die("Must specify at most one entry point or script.", INVALID_OPTIONS)

    if options.entry_point:
        pex_builder.set_entry_point(options.entry_point)
    elif options.script:
        pex_builder.set_script(options.script)

    if options.python_shebang:
        pex_builder.set_shebang(options.python_shebang)

    return pex_builder
示例#7
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def build_pex(reqs, options):
    interpreters = None  # Default to the current interpreter.

    # NB: options.python and interpreter constraints cannot be used together.
    if options.python:
        with TRACER.timed('Resolving interpreters', V=2):

            def to_python_interpreter(full_path_or_basename):
                if os.path.exists(full_path_or_basename):
                    return PythonInterpreter.from_binary(full_path_or_basename)
                else:
                    interpreter = PythonInterpreter.from_env(
                        full_path_or_basename)
                    if interpreter is None:
                        die('Failed to find interpreter: %s' %
                            full_path_or_basename)
                    return interpreter

            interpreters = [
                to_python_interpreter(interp) for interp in options.python
            ]
    elif options.interpreter_constraint:
        with TRACER.timed('Resolving interpreters', V=2):
            constraints = options.interpreter_constraint
            validate_constraints(constraints)
            if options.rc_file or not ENV.PEX_IGNORE_RCFILES:
                rc_variables = Variables.from_rc(rc=options.rc_file)
                pex_python_path = rc_variables.get('PEX_PYTHON_PATH', None)
            else:
                pex_python_path = None
            interpreters = list(
                iter_compatible_interpreters(pex_python_path, constraints))
            if not interpreters:
                die('Could not find compatible interpreter',
                    CANNOT_SETUP_INTERPRETER)

    try:
        with open(options.preamble_file) as preamble_fd:
            preamble = preamble_fd.read()
    except TypeError:
        # options.preamble_file is None
        preamble = None

    interpreter = min(interpreters) if interpreters else None

    pex_builder = PEXBuilder(path=safe_mkdtemp(),
                             interpreter=interpreter,
                             preamble=preamble)

    def walk_and_do(fn, src_dir):
        src_dir = os.path.normpath(src_dir)
        for root, dirs, files in os.walk(src_dir):
            for f in files:
                src_file_path = os.path.join(root, f)
                dst_path = os.path.relpath(src_file_path, src_dir)
                fn(src_file_path, dst_path)

    for directory in options.sources_directory:
        walk_and_do(pex_builder.add_source, directory)

    for directory in options.resources_directory:
        walk_and_do(pex_builder.add_resource, directory)

    pex_info = pex_builder.info
    pex_info.zip_safe = options.zip_safe
    pex_info.pex_path = options.pex_path
    pex_info.always_write_cache = options.always_write_cache
    pex_info.ignore_errors = options.ignore_errors
    pex_info.emit_warnings = options.emit_warnings
    pex_info.inherit_path = options.inherit_path
    if options.interpreter_constraint:
        for ic in options.interpreter_constraint:
            pex_builder.add_interpreter_constraint(ic)

    # NB: `None` means use the default (pypi) index, `[]` means use no indexes.
    indexes = None
    if options.indexes != [_PYPI] and options.indexes is not None:
        indexes = [str(index) for index in options.indexes]

    with TRACER.timed(
            'Resolving distributions ({})'.format(reqs +
                                                  options.requirement_files)):
        try:
            resolveds = resolve_multi(
                requirements=reqs,
                requirement_files=options.requirement_files,
                constraint_files=options.constraint_files,
                allow_prereleases=options.allow_prereleases,
                transitive=options.transitive,
                interpreters=interpreters,
                platforms=options.platforms,
                indexes=indexes,
                find_links=options.find_links,
                cache=options.cache_dir,
                build=options.build,
                use_wheel=options.use_wheel,
                compile=options.compile,
                manylinux=options.manylinux,
                max_parallel_jobs=options.max_parallel_jobs,
                ignore_errors=options.ignore_errors)

            for resolved_dist in resolveds:
                log('  %s -> %s' %
                    (resolved_dist.requirement, resolved_dist.distribution),
                    V=options.verbosity)
                pex_builder.add_distribution(resolved_dist.distribution)
                pex_builder.add_requirement(resolved_dist.requirement)
        except Unsatisfiable as e:
            die(e)

    if options.entry_point and options.script:
        die('Must specify at most one entry point or script.', INVALID_OPTIONS)

    if options.entry_point:
        pex_builder.set_entry_point(options.entry_point)
    elif options.script:
        pex_builder.set_script(options.script)

    if options.python_shebang:
        pex_builder.set_shebang(options.python_shebang)

    return pex_builder
示例#8
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def find_interpreters(path, *constraints):
    # type: (List[str], *str) -> List[AnyStr]
    return [
        interp.binary for interp in iter_compatible_interpreters(
            path=os.pathsep.join(path), compatibility_constraints=constraints)
    ]
示例#9
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def build_pex(reqs, options, cache=None):
    interpreters = None  # Default to the current interpreter.

    pex_python_path = None  # Defaults to $PATH
    if options.rc_file or not ENV.PEX_IGNORE_RCFILES:
        rc_variables = Variables(rc=options.rc_file)
        pex_python_path = rc_variables.PEX_PYTHON_PATH

    # NB: options.python and interpreter constraints cannot be used together.
    if options.python:
        with TRACER.timed("Resolving interpreters", V=2):

            def to_python_interpreter(full_path_or_basename):
                if os.path.isfile(full_path_or_basename):
                    return PythonInterpreter.from_binary(full_path_or_basename)
                else:
                    interpreter = PythonInterpreter.from_env(full_path_or_basename)
                    if interpreter is None:
                        die("Failed to find interpreter: %s" % full_path_or_basename)
                    return interpreter

            interpreters = [to_python_interpreter(interp) for interp in options.python]
    elif options.interpreter_constraint:
        with TRACER.timed("Resolving interpreters", V=2):
            constraints = options.interpreter_constraint
            validate_constraints(constraints)
            try:
                interpreters = list(iter_compatible_interpreters(pex_python_path, constraints))
            except UnsatisfiableInterpreterConstraintsError as e:
                die(
                    e.create_message("Could not find a compatible interpreter."),
                    CANNOT_SETUP_INTERPRETER,
                )

    platforms = OrderedSet(options.platforms)
    interpreters = interpreters or []
    if options.platforms and options.resolve_local_platforms:
        with TRACER.timed(
            "Searching for local interpreters matching {}".format(", ".join(map(str, platforms)))
        ):
            candidate_interpreters = OrderedSet(iter_compatible_interpreters(pex_python_path))
            candidate_interpreters.add(PythonInterpreter.get())
            for candidate_interpreter in candidate_interpreters:
                resolved_platforms = candidate_interpreter.supported_platforms.intersection(
                    platforms
                )
                if resolved_platforms:
                    for resolved_platform in resolved_platforms:
                        TRACER.log(
                            "Resolved {} for platform {}".format(
                                candidate_interpreter, resolved_platform
                            )
                        )
                        platforms.remove(resolved_platform)
                    interpreters.append(candidate_interpreter)
        if platforms:
            TRACER.log(
                "Could not resolve a local interpreter for {}, will resolve only binary distributions "
                "for {}.".format(
                    ", ".join(map(str, platforms)),
                    "this platform" if len(platforms) == 1 else "these platforms",
                )
            )

    interpreter = min(interpreters) if interpreters else None
    if options.use_first_matching_interpreter and interpreters:
        if len(interpreters) > 1:
            unused_interpreters = set(interpreters) - {interpreter}
            TRACER.log(
                "Multiple interpreters resolved, but only using {} because "
                "`--use-first-matching-interpreter` was used. These interpreters were matched but "
                "will not be used: {}".format(
                    interpreter.binary,
                    ", ".join(interpreter.binary for interpreter in sorted(unused_interpreters)),
                )
            )
        interpreters = [interpreter]

    try:
        with open(options.preamble_file) as preamble_fd:
            preamble = preamble_fd.read()
    except TypeError:
        # options.preamble_file is None
        preamble = None

    pex_builder = PEXBuilder(path=safe_mkdtemp(), interpreter=interpreter, preamble=preamble)

    def walk_and_do(fn, src_dir):
        src_dir = os.path.normpath(src_dir)
        for root, dirs, files in os.walk(src_dir):
            for f in files:
                src_file_path = os.path.join(root, f)
                dst_path = os.path.relpath(src_file_path, src_dir)
                fn(src_file_path, dst_path)

    for directory in options.sources_directory:
        walk_and_do(pex_builder.add_source, directory)

    for directory in options.resources_directory:
        walk_and_do(pex_builder.add_resource, directory)

    pex_info = pex_builder.info
    pex_info.zip_safe = options.zip_safe
    pex_info.unzip = options.unzip
    pex_info.pex_path = options.pex_path
    pex_info.always_write_cache = options.always_write_cache
    pex_info.ignore_errors = options.ignore_errors
    pex_info.emit_warnings = options.emit_warnings
    pex_info.inherit_path = options.inherit_path
    pex_info.pex_root = options.runtime_pex_root
    pex_info.strip_pex_env = options.strip_pex_env

    # If we're only building the PEX for the first of many interpreters due to
    # `--use-first-matching-interpreter` selection, we do not want to enable those same interpreter
    # constraints at runtime, where they could lead to a different interpreter being selected
    # leading to a failure to execute the PEX. Instead we rely on the shebang set by that single
    # interpreter to pick out a similar interpreter at runtime (for a CPython interpreter, the
    # shebang will be `#!/usr/bin/env pythonX.Y` which should generally be enough to select a
    # matching interpreter. To be clear though, there are many corners this will not work for
    # including mismatching abi (python2.7m vs python2.7mu) when the PEX contains platform specific
    # wheels, etc.
    if options.interpreter_constraint and not options.use_first_matching_interpreter:
        for ic in options.interpreter_constraint:
            pex_builder.add_interpreter_constraint(ic)

    # NB: `None` means use the default (pypi) index, `[]` means use no indexes.
    indexes = None
    if options.indexes != [_PYPI] and options.indexes is not None:
        indexes = [str(index) for index in options.indexes]

    for requirements_pex in options.requirements_pexes:
        pex_builder.add_from_requirements_pex(requirements_pex)

    with TRACER.timed("Resolving distributions ({})".format(reqs + options.requirement_files)):
        network_configuration = NetworkConfiguration.create(
            cache_ttl=options.cache_ttl,
            retries=options.retries,
            timeout=options.timeout,
            headers=options.headers,
            proxy=options.proxy,
            cert=options.cert,
            client_cert=options.client_cert,
        )

        try:
            resolveds = resolve_multi(
                requirements=reqs,
                requirement_files=options.requirement_files,
                constraint_files=options.constraint_files,
                allow_prereleases=options.allow_prereleases,
                transitive=options.transitive,
                interpreters=interpreters,
                platforms=list(platforms),
                indexes=indexes,
                find_links=options.find_links,
                network_configuration=network_configuration,
                cache=cache,
                build=options.build,
                use_wheel=options.use_wheel,
                compile=options.compile,
                manylinux=options.manylinux,
                max_parallel_jobs=options.max_parallel_jobs,
                ignore_errors=options.ignore_errors,
            )

            for resolved_dist in resolveds:
                log(
                    "  %s -> %s" % (resolved_dist.requirement, resolved_dist.distribution),
                    V=options.verbosity,
                )
                pex_builder.add_distribution(resolved_dist.distribution)
                pex_builder.add_requirement(resolved_dist.requirement)
        except Unsatisfiable as e:
            die(e)

    if options.entry_point and options.script:
        die("Must specify at most one entry point or script.", INVALID_OPTIONS)

    if options.entry_point:
        pex_builder.set_entry_point(options.entry_point)
    elif options.script:
        pex_builder.set_script(options.script)

    if options.python_shebang:
        pex_builder.set_shebang(options.python_shebang)

    return pex_builder
示例#10
0
def find_interpreters(path, *constraints):
    return [
        interp.binary for interp in iter_compatible_interpreters(
            path=os.pathsep.join(path), compatibility_constraints=constraints)
    ]
示例#11
0
文件: pex.py 项目: zhanwu/pex
def build_pex(args, options, resolver_option_builder):
    with TRACER.timed('Resolving interpreters', V=2):

        def to_python_interpreter(full_path_or_basename):
            if os.path.exists(full_path_or_basename):
                return PythonInterpreter.from_binary(full_path_or_basename)
            else:
                interpreter = PythonInterpreter.from_env(full_path_or_basename)
                if interpreter is None:
                    die('Failed to find interpreter: %s' %
                        full_path_or_basename)
                return interpreter

        interpreters = [
            to_python_interpreter(interp)
            for interp in options.python or [sys.executable]
        ]

    if options.interpreter_constraint:
        # NB: options.python and interpreter constraints cannot be used together, so this will not
        # affect usages of the interpreter(s) specified by the "--python" command line flag.
        constraints = options.interpreter_constraint
        validate_constraints(constraints)
        if options.rc_file or not ENV.PEX_IGNORE_RCFILES:
            rc_variables = Variables.from_rc(rc=options.rc_file)
            pex_python_path = rc_variables.get('PEX_PYTHON_PATH', '')
        else:
            pex_python_path = ""
        interpreters = list(
            iter_compatible_interpreters(pex_python_path, constraints))

    if not interpreters:
        die('Could not find compatible interpreter', CANNOT_SETUP_INTERPRETER)

    try:
        with open(options.preamble_file) as preamble_fd:
            preamble = preamble_fd.read()
    except TypeError:
        # options.preamble_file is None
        preamble = None

    interpreter = min(interpreters)

    pex_builder = PEXBuilder(path=safe_mkdtemp(),
                             interpreter=interpreter,
                             preamble=preamble)

    def walk_and_do(fn, src_dir):
        src_dir = os.path.normpath(src_dir)
        for root, dirs, files in os.walk(src_dir):
            for f in files:
                src_file_path = os.path.join(root, f)
                dst_path = os.path.relpath(src_file_path, src_dir)
                fn(src_file_path, dst_path)

    for directory in options.sources_directory:
        walk_and_do(pex_builder.add_source, directory)

    for directory in options.resources_directory:
        walk_and_do(pex_builder.add_resource, directory)

    pex_info = pex_builder.info
    pex_info.zip_safe = options.zip_safe
    pex_info.pex_path = options.pex_path
    pex_info.always_write_cache = options.always_write_cache
    pex_info.ignore_errors = options.ignore_errors
    pex_info.emit_warnings = options.emit_warnings
    pex_info.inherit_path = options.inherit_path
    if options.interpreter_constraint:
        for ic in options.interpreter_constraint:
            pex_builder.add_interpreter_constraint(ic)

    resolvables = resolvables_from_iterable(args,
                                            resolver_option_builder,
                                            interpreter=interpreter)

    for requirements_txt in options.requirement_files:
        resolvables.extend(
            requirements_from_file(requirements_txt,
                                   builder=resolver_option_builder,
                                   interpreter=interpreter))

    # pip states the constraints format is identical tor requirements
    # https://pip.pypa.io/en/stable/user_guide/#constraints-files
    for constraints_txt in options.constraint_files:
        constraints = []
        for r in requirements_from_file(constraints_txt,
                                        builder=resolver_option_builder,
                                        interpreter=interpreter):
            r.is_constraint = True
            constraints.append(r)
        resolvables.extend(constraints)

    with TRACER.timed('Resolving distributions'):
        try:
            resolveds = resolve_multi(
                resolvables,
                interpreters=interpreters,
                platforms=options.platforms,
                cache=options.cache_dir,
                cache_ttl=options.cache_ttl,
                allow_prereleases=resolver_option_builder.prereleases_allowed,
                use_manylinux=options.use_manylinux,
                transitive=options.transitive)

            for resolved_dist in resolveds:
                log('  %s -> %s' %
                    (resolved_dist.requirement, resolved_dist.distribution),
                    V=options.verbosity)
                pex_builder.add_distribution(resolved_dist.distribution)
                pex_builder.add_requirement(resolved_dist.requirement)
        except Unsatisfiable as e:
            die(e)

    if options.entry_point and options.script:
        die('Must specify at most one entry point or script.', INVALID_OPTIONS)

    if options.entry_point:
        pex_builder.set_entry_point(options.entry_point)
    elif options.script:
        pex_builder.set_script(options.script)

    if options.python_shebang:
        pex_builder.set_shebang(options.python_shebang)

    return pex_builder