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BUG=b:233893248
TEST=CQ

Change-Id: I66591d7a738d241aed3290138c0f68065ab10a6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3879174
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Alex Klein <saklein@chromium.org>
diff --git a/api/compile_build_api_proto.py b/api/compile_build_api_proto.py
index 44002ab..bc2fc66 100644
--- a/api/compile_build_api_proto.py
+++ b/api/compile_build_api_proto.py
@@ -22,373 +22,396 @@
 
 
 # Chromite's protobuf library version (third_party/google/protobuf).
-PROTOC_VERSION = '3.13.0'
+PROTOC_VERSION = "3.13.0"
 
-_CIPD_PACKAGE = 'infra/tools/protoc/linux-amd64'
-_CIPD_PACKAGE_VERSION = f'protobuf_version:v{PROTOC_VERSION}'
+_CIPD_PACKAGE = "infra/tools/protoc/linux-amd64"
+_CIPD_PACKAGE_VERSION = f"protobuf_version:v{PROTOC_VERSION}"
 
 
 class Error(Exception):
-  """Base error class for the module."""
+    """Base error class for the module."""
 
 
 class GenerationError(Error):
-  """A failure we can't recover from."""
+    """A failure we can't recover from."""
 
 
 @enum.unique
 class ProtocVersion(enum.Enum):
-  """Enum for possible protoc versions."""
-  # The SDK version of the bindings use the protoc in the SDK, and so is
-  # compatible with the protobuf library in the SDK, i.e. the one installed
-  # via the ebuild.
-  SDK = enum.auto()
-  # The Chromite version of the bindings uses a protoc binary downloaded from
-  # CIPD that matches the version of the protobuf library in
-  # chromite/third_party/google/protobuf.
-  CHROMITE = enum.auto()
+    """Enum for possible protoc versions."""
 
-  def get_gen_dir(self) -> Path:
-    """Get the chromite/api directory path."""
-    if self is ProtocVersion.SDK:
-      return Path(constants.CHROMITE_DIR) / 'api' / 'gen_sdk'
-    else:
-      return Path(constants.CHROMITE_DIR) / 'api' / 'gen'
+    # The SDK version of the bindings use the protoc in the SDK, and so is
+    # compatible with the protobuf library in the SDK, i.e. the one installed
+    # via the ebuild.
+    SDK = enum.auto()
+    # The Chromite version of the bindings uses a protoc binary downloaded from
+    # CIPD that matches the version of the protobuf library in
+    # chromite/third_party/google/protobuf.
+    CHROMITE = enum.auto()
 
-  def get_proto_dir(self) -> Path:
-    """Get the proto directory for the target protoc."""
-    return Path(constants.CHROMITE_DIR) / 'infra' / 'proto'
+    def get_gen_dir(self) -> Path:
+        """Get the chromite/api directory path."""
+        if self is ProtocVersion.SDK:
+            return Path(constants.CHROMITE_DIR) / "api" / "gen_sdk"
+        else:
+            return Path(constants.CHROMITE_DIR) / "api" / "gen"
 
-  def get_protoc_command(self, cipd_root: Optional[Path] = None) -> Path:
-    """Get protoc command path."""
-    assert self is ProtocVersion.SDK or cipd_root
-    if self is ProtocVersion.SDK:
-      return Path('protoc')
-    elif cipd_root:
-      return cipd_root / 'protoc'
+    def get_proto_dir(self) -> Path:
+        """Get the proto directory for the target protoc."""
+        return Path(constants.CHROMITE_DIR) / "infra" / "proto"
+
+    def get_protoc_command(self, cipd_root: Optional[Path] = None) -> Path:
+        """Get protoc command path."""
+        assert self is ProtocVersion.SDK or cipd_root
+        if self is ProtocVersion.SDK:
+            return Path("protoc")
+        elif cipd_root:
+            return cipd_root / "protoc"
 
 
 @enum.unique
 class SubdirectorySet(enum.Enum):
-  """Enum for the subsets of the proto to compile."""
-  ALL = enum.auto()
-  DEFAULT = enum.auto()
+    """Enum for the subsets of the proto to compile."""
 
-  def get_source_dirs(self, source: Path,
-                      chromeos_config_path: Path) -> Iterable[Path]:
-    """Get the directories for the given subdirectory set."""
-    if self is self.ALL:
-      return [
-          source,
-          chromeos_config_path / 'proto' / 'chromiumos',
-      ]
+    ALL = enum.auto()
+    DEFAULT = enum.auto()
 
-    subdirs = [
-        source / 'analysis_service',
-        source / 'chromite',
-        source / 'chromiumos',
-        source / 'config',
-        source / 'test_platform',
-        source / 'device',
-        chromeos_config_path / 'proto' / 'chromiumos',
-    ]
-    return subdirs
+    def get_source_dirs(
+        self, source: Path, chromeos_config_path: Path
+    ) -> Iterable[Path]:
+        """Get the directories for the given subdirectory set."""
+        if self is self.ALL:
+            return [
+                source,
+                chromeos_config_path / "proto" / "chromiumos",
+            ]
+
+        subdirs = [
+            source / "analysis_service",
+            source / "chromite",
+            source / "chromiumos",
+            source / "config",
+            source / "test_platform",
+            source / "device",
+            chromeos_config_path / "proto" / "chromiumos",
+        ]
+        return subdirs
 
 
 def InstallProtoc(protoc_version: ProtocVersion) -> Path:
-  """Install protoc from CIPD."""
-  if protoc_version is not ProtocVersion.CHROMITE:
-    cipd_root = None
-  else:
-    cipd_root = Path(
-        cipd.InstallPackage(cipd.GetCIPDFromCache(), _CIPD_PACKAGE,
-                            _CIPD_PACKAGE_VERSION))
-  return protoc_version.get_protoc_command(cipd_root)
+    """Install protoc from CIPD."""
+    if protoc_version is not ProtocVersion.CHROMITE:
+        cipd_root = None
+    else:
+        cipd_root = Path(
+            cipd.InstallPackage(
+                cipd.GetCIPDFromCache(), _CIPD_PACKAGE, _CIPD_PACKAGE_VERSION
+            )
+        )
+    return protoc_version.get_protoc_command(cipd_root)
 
 
 def _CleanTargetDirectory(directory: Path):
-  """Remove any existing generated files in the directory.
+    """Remove any existing generated files in the directory.
 
-  This clean only removes the generated files to avoid accidentally destroying
-  __init__.py customizations down the line. That will leave otherwise empty
-  directories in place if things get moved. Neither case is relevant at the
-  time of writing, but lingering empty directories seemed better than
-  diagnosing accidental __init__.py changes.
+    This clean only removes the generated files to avoid accidentally destroying
+    __init__.py customizations down the line. That will leave otherwise empty
+    directories in place if things get moved. Neither case is relevant at the
+    time of writing, but lingering empty directories seemed better than
+    diagnosing accidental __init__.py changes.
 
-  Args:
-    directory: Path to be cleaned up.
-  """
-  logging.info('Cleaning old files from %s.', directory)
-  for current in directory.rglob('*_pb2.py'):
-    # Remove old generated files.
-    current.unlink()
-  for current in directory.rglob('__init__.py'):
-    # Remove empty init files to clean up otherwise empty directories.
-    if not current.stat().st_size:
-      current.unlink()
+    Args:
+      directory: Path to be cleaned up.
+    """
+    logging.info("Cleaning old files from %s.", directory)
+    for current in directory.rglob("*_pb2.py"):
+        # Remove old generated files.
+        current.unlink()
+    for current in directory.rglob("__init__.py"):
+        # Remove empty init files to clean up otherwise empty directories.
+        if not current.stat().st_size:
+            current.unlink()
 
 
-def _GenerateFiles(source: Path, output: Path, protoc_version: ProtocVersion,
-                   dir_subset: SubdirectorySet, protoc_bin_path: Path):
-  """Generate the proto files from the |source| tree into |output|.
+def _GenerateFiles(
+    source: Path,
+    output: Path,
+    protoc_version: ProtocVersion,
+    dir_subset: SubdirectorySet,
+    protoc_bin_path: Path,
+):
+    """Generate the proto files from the |source| tree into |output|.
 
-  Args:
-    source: Path to the proto source root directory.
-    output: Path to the output root directory.
-    protoc_version: Which protoc to use.
-    dir_subset: The subset of the proto to compile.
-    protoc_bin_path: The protoc command to use.
-  """
-  logging.info('Generating files to %s.', output)
-  osutils.SafeMakedirs(output)
+    Args:
+      source: Path to the proto source root directory.
+      output: Path to the output root directory.
+      protoc_version: Which protoc to use.
+      dir_subset: The subset of the proto to compile.
+      protoc_bin_path: The protoc command to use.
+    """
+    logging.info("Generating files to %s.", output)
+    osutils.SafeMakedirs(output)
 
-  targets = []
+    targets = []
 
-  chromeos_config_path = (
-      Path(constants.SOURCE_ROOT) / 'src' / 'config')
+    chromeos_config_path = Path(constants.SOURCE_ROOT) / "src" / "config"
 
-  with tempfile.TemporaryDirectory() as tempdir:
-    if not chromeos_config_path.exists():
-      chromeos_config_path = Path(tempdir) / 'config'
+    with tempfile.TemporaryDirectory() as tempdir:
+        if not chromeos_config_path.exists():
+            chromeos_config_path = Path(tempdir) / "config"
 
-      logging.info('Creating shallow clone of chromiumos/config')
-      git.Clone(
-          chromeos_config_path,
-          '%s/chromiumos/config' % constants.EXTERNAL_GOB_URL,
-          depth=1)
+            logging.info("Creating shallow clone of chromiumos/config")
+            git.Clone(
+                chromeos_config_path,
+                "%s/chromiumos/config" % constants.EXTERNAL_GOB_URL,
+                depth=1,
+            )
 
-    for src_dir in dir_subset.get_source_dirs(source, chromeos_config_path):
-      targets.extend(list(src_dir.rglob('*.proto')))
+        for src_dir in dir_subset.get_source_dirs(source, chromeos_config_path):
+            targets.extend(list(src_dir.rglob("*.proto")))
 
-    cmd = [
-        protoc_bin_path,
-        '-I',
-        chromeos_config_path / 'proto',
-        '--python_out',
-        output,
-        '--proto_path',
-        source,
-    ]
-    cmd.extend(targets)
+        cmd = [
+            protoc_bin_path,
+            "-I",
+            chromeos_config_path / "proto",
+            "--python_out",
+            output,
+            "--proto_path",
+            source,
+        ]
+        cmd.extend(targets)
 
-    result = cros_build_lib.dbg_run(
-        cmd,
-        cwd=source,
-        check=False,
-        enter_chroot=protoc_version is ProtocVersion.SDK)
+        result = cros_build_lib.dbg_run(
+            cmd,
+            cwd=source,
+            check=False,
+            enter_chroot=protoc_version is ProtocVersion.SDK,
+        )
 
-    if result.returncode:
-      raise GenerationError('Error compiling the proto. See the output for a '
-                            'message.')
+        if result.returncode:
+            raise GenerationError(
+                "Error compiling the proto. See the output for a " "message."
+            )
 
 
 def _InstallMissingInits(directory: Path):
-  """Add any __init__.py files not present in the generated protobuf folders."""
-  logging.info('Adding missing __init__.py files in %s.', directory)
-  # glob ** returns only directories.
-  for current in directory.rglob('**'):
-    (current / '__init__.py').touch()
+    """Add any __init__.py files not present in the generated protobuf folders."""
+    logging.info("Adding missing __init__.py files in %s.", directory)
+    # glob ** returns only directories.
+    for current in directory.rglob("**"):
+        (current / "__init__.py").touch()
 
 
 def _PostprocessFiles(directory: Path, protoc_version: ProtocVersion):
-  """Do postprocessing on the generated files.
+    """Do postprocessing on the generated files.
 
-  Args:
-    directory: The root directory containing the generated files that are
-      to be processed.
-    protoc_version: Which protoc is being used to generate the files.
-  """
-  logging.info('Postprocessing: Fix imports in %s.', directory)
-  # We are using a negative address here (the /address/! portion of the sed
-  # command) to make sure we don't change any imports from protobuf itself.
-  address = '^from google.protobuf'
-  # Find: 'from x import y_pb2 as x_dot_y_pb2'.
-  # "\(^google.protobuf[^ ]*\)" matches the module we're importing from.
-  #   - \( and \) are for groups in sed.
-  #   - ^google.protobuf prevents changing the import for protobuf's files.
-  #   - [^ ] = Not a space. The [:space:] character set is too broad, but would
-  #       technically work too.
-  find = r'^from \([^ ]*\) import \([^ ]*\)_pb2 as \([^ ]*\)$'
-  # Substitute: 'from chromite.api.gen[_sdk].x import y_pb2 as x_dot_y_pb2'.
-  if protoc_version is ProtocVersion.SDK:
-    sub = 'from chromite.api.gen_sdk.\\1 import \\2_pb2 as \\3'
-  else:
-    sub = 'from chromite.api.gen.\\1 import \\2_pb2 as \\3'
+    Args:
+      directory: The root directory containing the generated files that are
+        to be processed.
+      protoc_version: Which protoc is being used to generate the files.
+    """
+    logging.info("Postprocessing: Fix imports in %s.", directory)
+    # We are using a negative address here (the /address/! portion of the sed
+    # command) to make sure we don't change any imports from protobuf itself.
+    address = "^from google.protobuf"
+    # Find: 'from x import y_pb2 as x_dot_y_pb2'.
+    # "\(^google.protobuf[^ ]*\)" matches the module we're importing from.
+    #   - \( and \) are for groups in sed.
+    #   - ^google.protobuf prevents changing the import for protobuf's files.
+    #   - [^ ] = Not a space. The [:space:] character set is too broad, but would
+    #       technically work too.
+    find = r"^from \([^ ]*\) import \([^ ]*\)_pb2 as \([^ ]*\)$"
+    # Substitute: 'from chromite.api.gen[_sdk].x import y_pb2 as x_dot_y_pb2'.
+    if protoc_version is ProtocVersion.SDK:
+        sub = "from chromite.api.gen_sdk.\\1 import \\2_pb2 as \\3"
+    else:
+        sub = "from chromite.api.gen.\\1 import \\2_pb2 as \\3"
 
-  from_sed = [
-      'sed', '-i',
-      '/%(address)s/!s/%(find)s/%(sub)s/g' % {
-          'address': address,
-          'find': find,
-          'sub': sub
-      }
-  ]
-
-  seds = [from_sed]
-  if protoc_version is ProtocVersion.CHROMITE:
-    # We also need to change the google.protobuf imports to point directly
-    # at the chromite.third_party version of the library.
-    # The SDK version of the proto is meant to be used with the protobuf
-    # libraries installed in the SDK, so leave those as google.protobuf.
-    g_p_address = '^from google.protobuf'
-    g_p_find = r'from \([^ ]*\) import \(.*\)$'
-    g_p_sub = 'from chromite.third_party.\\1 import \\2'
-    google_protobuf_sed = [
-        'sed', '-i',
-        '/%(address)s/s/%(find)s/%(sub)s/g' % {
-            'address': g_p_address,
-            'find': g_p_find,
-            'sub': g_p_sub
-        }
+    from_sed = [
+        "sed",
+        "-i",
+        "/%(address)s/!s/%(find)s/%(sub)s/g"
+        % {"address": address, "find": find, "sub": sub},
     ]
-    seds.append(google_protobuf_sed)
 
-  pb2 = list(directory.rglob('*_pb2.py'))
-  if pb2:
-    for sed in seds:
-      cros_build_lib.dbg_run(sed + pb2)
+    seds = [from_sed]
+    if protoc_version is ProtocVersion.CHROMITE:
+        # We also need to change the google.protobuf imports to point directly
+        # at the chromite.third_party version of the library.
+        # The SDK version of the proto is meant to be used with the protobuf
+        # libraries installed in the SDK, so leave those as google.protobuf.
+        g_p_address = "^from google.protobuf"
+        g_p_find = r"from \([^ ]*\) import \(.*\)$"
+        g_p_sub = "from chromite.third_party.\\1 import \\2"
+        google_protobuf_sed = [
+            "sed",
+            "-i",
+            "/%(address)s/s/%(find)s/%(sub)s/g"
+            % {"address": g_p_address, "find": g_p_find, "sub": g_p_sub},
+        ]
+        seds.append(google_protobuf_sed)
+
+    pb2 = list(directory.rglob("*_pb2.py"))
+    if pb2:
+        for sed in seds:
+            cros_build_lib.dbg_run(sed + pb2)
 
 
-def CompileProto(protoc_version: ProtocVersion,
-                 output: Optional[Path] = None,
-                 dir_subset: SubdirectorySet = SubdirectorySet.DEFAULT,
-                 postprocess: bool = True):
-  """Compile the Build API protobuf files.
+def CompileProto(
+    protoc_version: ProtocVersion,
+    output: Optional[Path] = None,
+    dir_subset: SubdirectorySet = SubdirectorySet.DEFAULT,
+    postprocess: bool = True,
+):
+    """Compile the Build API protobuf files.
 
-  By default this will compile from infra/proto/src to api/gen. The output
-  directory may be changed, but the imports will always be treated as if it is
-  in the default location.
+    By default this will compile from infra/proto/src to api/gen. The output
+    directory may be changed, but the imports will always be treated as if it is
+    in the default location.
 
-  Args:
-    output: The output directory.
-    protoc_version: Which protoc to use for the compile.
-    dir_subset: What proto to compile.
-    postprocess: Whether to run the postprocess step.
-  """
-  protoc_version = protoc_version or ProtocVersion.CHROMITE
-  source = protoc_version.get_proto_dir() / 'src'
-  if not output:
-    output = protoc_version.get_gen_dir()
+    Args:
+      output: The output directory.
+      protoc_version: Which protoc to use for the compile.
+      dir_subset: What proto to compile.
+      postprocess: Whether to run the postprocess step.
+    """
+    protoc_version = protoc_version or ProtocVersion.CHROMITE
+    source = protoc_version.get_proto_dir() / "src"
+    if not output:
+        output = protoc_version.get_gen_dir()
 
-  protoc_bin_path = InstallProtoc(protoc_version)
-  _CleanTargetDirectory(output)
-  _GenerateFiles(source, output, protoc_version, dir_subset, protoc_bin_path)
-  _InstallMissingInits(output)
-  if postprocess:
-    _PostprocessFiles(output, protoc_version)
+    protoc_bin_path = InstallProtoc(protoc_version)
+    _CleanTargetDirectory(output)
+    _GenerateFiles(source, output, protoc_version, dir_subset, protoc_bin_path)
+    _InstallMissingInits(output)
+    if postprocess:
+        _PostprocessFiles(output, protoc_version)
 
 
 def GetParser():
-  """Build the argument parser."""
-  parser = commandline.ArgumentParser(description=__doc__)
-  standard_group = parser.add_argument_group(
-      'Committed Bindings',
-      description='Options for generating the bindings in chromite/api/.')
-  standard_group.add_argument(
-      '--chromite',
-      dest='protoc_version',
-      action='append_const',
-      const=ProtocVersion.CHROMITE,
-      help='Generate only the chromite bindings. Generates all by default. The '
-           'chromite bindings are compatible with the version of protobuf in '
-           'chromite/third_party.')
-  standard_group.add_argument(
-      '--sdk',
-      dest='protoc_version',
-      action='append_const',
-      const=ProtocVersion.SDK,
-      help='Generate only the SDK bindings. Generates all by default. The SDK '
-           'bindings are compiled by protoc in the SDK, and is compatible '
-           'with the version of protobuf in the SDK (i.e. the one installed by '
-           'the ebuild).')
+    """Build the argument parser."""
+    parser = commandline.ArgumentParser(description=__doc__)
+    standard_group = parser.add_argument_group(
+        "Committed Bindings",
+        description="Options for generating the bindings in chromite/api/.",
+    )
+    standard_group.add_argument(
+        "--chromite",
+        dest="protoc_version",
+        action="append_const",
+        const=ProtocVersion.CHROMITE,
+        help="Generate only the chromite bindings. Generates all by default. The "
+        "chromite bindings are compatible with the version of protobuf in "
+        "chromite/third_party.",
+    )
+    standard_group.add_argument(
+        "--sdk",
+        dest="protoc_version",
+        action="append_const",
+        const=ProtocVersion.SDK,
+        help="Generate only the SDK bindings. Generates all by default. The SDK "
+        "bindings are compiled by protoc in the SDK, and is compatible "
+        "with the version of protobuf in the SDK (i.e. the one installed by "
+        "the ebuild).",
+    )
 
-  dest_group = parser.add_argument_group(
-      'Out of Tree Bindings',
-      description='Options for generating bindings in a custom location.')
-  dest_group.add_argument(
-      '--destination',
-      type='path',
-      help='A directory where a single version of the proto should be '
-           'generated. When not given, the proto generates in all default '
-           'locations instead.')
-  dest_group.add_argument(
-      '--dest-sdk',
-      action='store_const',
-      dest='dest_protoc',
-      default=ProtocVersion.CHROMITE,
-      const=ProtocVersion.SDK,
-      help='Generate the SDK version of the protos in --destination instead of '
-           'the chromite version.')
-  dest_group.add_argument(
-      '--all-proto',
-      action='store_const',
-      dest='dir_subset',
-      default=SubdirectorySet.DEFAULT,
-      const=SubdirectorySet.ALL,
-      help='Compile ALL proto instead of just the subset needed for the API. '
-           'Only considered when generating out of tree bindings.')
-  dest_group.add_argument(
-      '--skip-postprocessing',
-      action='store_false',
-      dest='postprocess',
-      default=True,
-      help='Skip postprocessing files.'
-  )
-  return parser
+    dest_group = parser.add_argument_group(
+        "Out of Tree Bindings",
+        description="Options for generating bindings in a custom location.",
+    )
+    dest_group.add_argument(
+        "--destination",
+        type="path",
+        help="A directory where a single version of the proto should be "
+        "generated. When not given, the proto generates in all default "
+        "locations instead.",
+    )
+    dest_group.add_argument(
+        "--dest-sdk",
+        action="store_const",
+        dest="dest_protoc",
+        default=ProtocVersion.CHROMITE,
+        const=ProtocVersion.SDK,
+        help="Generate the SDK version of the protos in --destination instead of "
+        "the chromite version.",
+    )
+    dest_group.add_argument(
+        "--all-proto",
+        action="store_const",
+        dest="dir_subset",
+        default=SubdirectorySet.DEFAULT,
+        const=SubdirectorySet.ALL,
+        help="Compile ALL proto instead of just the subset needed for the API. "
+        "Only considered when generating out of tree bindings.",
+    )
+    dest_group.add_argument(
+        "--skip-postprocessing",
+        action="store_false",
+        dest="postprocess",
+        default=True,
+        help="Skip postprocessing files.",
+    )
+    return parser
 
 
 def _ParseArguments(argv):
-  """Parse and validate arguments."""
-  parser = GetParser()
-  opts = parser.parse_args(argv)
+    """Parse and validate arguments."""
+    parser = GetParser()
+    opts = parser.parse_args(argv)
 
-  if not opts.protoc_version:
-    opts.protoc_version = [ProtocVersion.CHROMITE, ProtocVersion.SDK]
+    if not opts.protoc_version:
+        opts.protoc_version = [ProtocVersion.CHROMITE, ProtocVersion.SDK]
 
-  if opts.destination:
-    opts.destination = Path(opts.destination)
+    if opts.destination:
+        opts.destination = Path(opts.destination)
 
-  opts.Freeze()
-  return opts
+    opts.Freeze()
+    return opts
 
 
 def main(argv):
-  opts = _ParseArguments(argv)
+    opts = _ParseArguments(argv)
 
-  if opts.destination:
-    # Destination set, only compile a single version in the destination.
-    try:
-      CompileProto(
-          protoc_version=opts.dest_protoc,
-          output=opts.destination,
-          dir_subset=opts.dir_subset,
-          postprocess=opts.postprocess
-      )
-    except Error as e:
-      cros_build_lib.Die('Error compiling bindings to destination: %s', str(e))
-    else:
-      return 0
+    if opts.destination:
+        # Destination set, only compile a single version in the destination.
+        try:
+            CompileProto(
+                protoc_version=opts.dest_protoc,
+                output=opts.destination,
+                dir_subset=opts.dir_subset,
+                postprocess=opts.postprocess,
+            )
+        except Error as e:
+            cros_build_lib.Die(
+                "Error compiling bindings to destination: %s", str(e)
+            )
+        else:
+            return 0
 
-  if ProtocVersion.CHROMITE in opts.protoc_version:
-    # Compile the chromite bindings.
-    try:
-      CompileProto(protoc_version=ProtocVersion.CHROMITE)
-    except Error as e:
-      cros_build_lib.Die('Error compiling chromite bindings: %s', str(e))
+    if ProtocVersion.CHROMITE in opts.protoc_version:
+        # Compile the chromite bindings.
+        try:
+            CompileProto(protoc_version=ProtocVersion.CHROMITE)
+        except Error as e:
+            cros_build_lib.Die("Error compiling chromite bindings: %s", str(e))
 
-  if ProtocVersion.SDK in opts.protoc_version:
-    # Compile the SDK bindings.
-    if not cros_build_lib.IsInsideChroot():
-      # Rerun inside of the SDK instead of trying to map all of the paths.
-      cmd = [
-          (Path(constants.CHROOT_SOURCE_ROOT) / 'chromite' / 'api' /
-           'compile_build_api_proto'),
-          '--sdk',
-      ]
-      result = cros_build_lib.dbg_run(cmd, enter_chroot=True, check=False)
-      return result.returncode
-    else:
-      try:
-        CompileProto(protoc_version=ProtocVersion.SDK)
-      except Error as e:
-        cros_build_lib.Die('Error compiling SDK bindings: %s', str(e))
+    if ProtocVersion.SDK in opts.protoc_version:
+        # Compile the SDK bindings.
+        if not cros_build_lib.IsInsideChroot():
+            # Rerun inside of the SDK instead of trying to map all of the paths.
+            cmd = [
+                (
+                    Path(constants.CHROOT_SOURCE_ROOT)
+                    / "chromite"
+                    / "api"
+                    / "compile_build_api_proto"
+                ),
+                "--sdk",
+            ]
+            result = cros_build_lib.dbg_run(cmd, enter_chroot=True, check=False)
+            return result.returncode
+        else:
+            try:
+                CompileProto(protoc_version=ProtocVersion.SDK)
+            except Error as e:
+                cros_build_lib.Die("Error compiling SDK bindings: %s", str(e))