Python PythonIdentity.get方法代码示例

# 需要导入模块: from pex.interpreter import PythonIdentity [as 别名]
# 或者: from pex.interpreter.PythonIdentity import get [as 别名]
  def __init__(self, root_dir, relpath=None, must_exist=True):
    """Creates a BuildFile object representing the BUILD file set at the specified path.

    :param string root_dir: The base directory of the project
    :param string relpath: The path relative to root_dir where the BUILD file is found - this can either point
        directly at the BUILD file or else to a directory which contains BUILD files
    :param bool must_exist: If True, the specified BUILD file must exist or else an IOError is thrown
    :raises IOError: if the root_dir path is not absolute
    :raises MissingBuildFileError: if the path does not house a BUILD file and must_exist is True
    """

    if not os.path.isabs(root_dir):
      raise self.InvalidRootDirError('BuildFile root_dir {root_dir} must be an absolute path.'
                                     .format(root_dir=root_dir))

    path = os.path.join(root_dir, relpath) if relpath else root_dir
    self._build_basename = BuildFile._BUILD_FILE_PREFIX
    buildfile = os.path.join(path, self._build_basename) if os.path.isdir(path) else path

    if must_exist:
      # If the build file must exist then we want to make sure it's not a dir.
      # In other cases we are ok with it being a dir, for example someone might have
      # repo/scripts/build/doit.sh.
      if os.path.isdir(buildfile):
        raise self.MissingBuildFileError(
          'Path to buildfile ({buildfile}) is a directory, but it must be a file.'
          .format(buildfile=buildfile))

      if not os.path.exists(os.path.dirname(buildfile)):
        raise self.MissingBuildFileError('Path to BUILD file does not exist at: {path}'
                                         .format(path=os.path.dirname(buildfile)))

    # There is no BUILD file without a prefix so select any viable sibling
    if not os.path.exists(buildfile) or os.path.isdir(buildfile):
      for build in BuildFile._get_all_build_files(os.path.dirname(buildfile)):
        self._build_basename = build
        buildfile = os.path.join(path, self._build_basename)
        break

    if must_exist:
      if not os.path.exists(buildfile):
        raise self.MissingBuildFileError('BUILD file does not exist at: {path}'
                                         .format(path=buildfile))

      if not BuildFile._is_buildfile_name(os.path.basename(buildfile)):
        raise self.MissingBuildFileError('{path} is not a BUILD file'
                                         .format(path=buildfile))

    self.root_dir = os.path.realpath(root_dir)
    self.full_path = os.path.realpath(buildfile)

    self.name = os.path.basename(self.full_path)
    self.parent_path = os.path.dirname(self.full_path)

    self._bytecode_path = os.path.join(self.parent_path,
                                       '.{name}.{ident}.pyc'.format(name=self.name,
                                                                    ident=PythonIdentity.get()))

    self.relpath = os.path.relpath(self.full_path, self.root_dir)
    self.spec_path = os.path.dirname(self.relpath)

# 需要导入模块: from pex.interpreter import PythonIdentity [as 别名]
# 或者: from pex.interpreter.PythonIdentity import get [as 别名]
def main():
    parser = optparse.OptionParser(usage="usage: %prog [options] output")
    parser.add_option("--entry-point", default="__main__")
    parser.add_option("--directory", action="store_true", default=False)
    parser.add_option(
        "--no-zip-safe", action="store_false", dest="zip_safe", default=True
    )
    parser.add_option("--python", default="")
    parser.add_option("--python-version", default="")
    parser.add_option("--python-shebang", default=None)
    parser.add_option("--preload", action="append", default=[])
    options, args = parser.parse_args()
    if len(args) == 1:
        output = args[0]
    else:
        parser.error("'output' positional argument is required")
        return 1

    # The manifest is passed via stdin, as it can sometimes get too large
    # to be passed as a CLA.
    manifest = json.load(sys.stdin)

    # The version of pkg_resources.py (from setuptools) on some distros is
    # too old for PEX.  So we keep a recent version in the buck repo and
    # force it into the process by constructing a custom PythonInterpreter
    # instance using it.
    if not options.python:
        options.python = sys.executable
        identity = PythonIdentity.get()
    elif not options.python_version:
        # Note: this is expensive (~500ms). prefer passing --python-version when possible.
        identity = PythonInterpreter.from_binary(options.python).identity
    else:
        # Convert "CPython 2.7" to "CPython 2 7 0"
        python_version = options.python_version.replace(".", " ").split()
        if len(python_version) == 3:
            python_version.append("0")
        identity = PythonIdentity.from_id_string(" ".join(python_version))

    interpreter = PythonInterpreter(options.python, identity, extras={})

    pex_builder = PEXBuilder(
        path=output if options.directory else None, interpreter=interpreter
    )

    if options.python_shebang is not None:
        pex_builder.set_shebang(options.python_shebang)

    # Set whether this PEX as zip-safe, meaning everything will stayed zipped up
    # and we'll rely on python's zip-import mechanism to load modules from
    # the PEX.  This may not work in some situations (e.g. native
    # libraries, libraries that want to find resources via the FS).
    pex_builder.info.zip_safe = options.zip_safe

    # Set the starting point for this PEX.
    pex_builder.info.entry_point = options.entry_point

    # Copy in our version of `pkg_resources` & `_markerlib`.
    copy_package(pex_builder, "pkg_resources", prefix=pex_builder.BOOTSTRAP_DIR)
    copy_package(pex_builder, "_markerlib", prefix=pex_builder.BOOTSTRAP_DIR)

    # Add the sources listed in the manifest.
    for dst, src in manifest["modules"].iteritems():
        # NOTE(agallagher): calls the `add_source` and `add_resource` below
        # hard-link the given source into the PEX temp dir.  Since OS X and
        # Linux behave different when hard-linking a source that is a
        # symbolic link (Linux does *not* follow symlinks), resolve any
        # layers of symlinks here to get consistent behavior.
        try:
            pex_builder.add_source(dereference_symlinks(src), dst)
        except OSError as e:
            raise Exception("Failed to add {}: {}".format(src, e))

    # Add resources listed in the manifest.
    for dst, src in manifest["resources"].iteritems():
        # NOTE(agallagher): see rationale above.
        pex_builder.add_resource(dereference_symlinks(src), dst)

    # Add resources listed in the manifest.
    for dst, src in manifest["nativeLibraries"].iteritems():
        # NOTE(agallagher): see rationale above.
        pex_builder.add_resource(dereference_symlinks(src), dst)

    if options.directory:
        pex_builder.freeze(code_hash=False, bytecode_compile=False)
    else:
        pex_builder.build(output)