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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/scripts/cros_generate_sysroot.py b/scripts/cros_generate_sysroot.py
index 6097869..f7e12f1 100644
--- a/scripts/cros_generate_sysroot.py
+++ b/scripts/cros_generate_sysroot.py
@@ -19,130 +19,167 @@
 from chromite.lib import toolchain
 
 
-DEFAULT_NAME = 'sysroot_%(package)s.tar.xz'
-PACKAGE_SEPARATOR = '/'
-SYSROOT = 'sysroot'
+DEFAULT_NAME = "sysroot_%(package)s.tar.xz"
+PACKAGE_SEPARATOR = "/"
+SYSROOT = "sysroot"
 
 
 def ParseCommandLine(argv):
-  """Parse args, and run environment-independent checks."""
-  parser = commandline.ArgumentParser(description=__doc__)
-  parser.add_argument('--board', required=True,
-                      help='The board to generate the sysroot for.')
-  parser.add_argument('--package', required=True,
-                      help='The packages to generate the sysroot for.')
-  parser.add_argument('--deps-only', action='store_true',
-                      default=False,
-                      help='Build dependencies only.')
-  parser.add_argument('--out-dir', type='path', required=True,
-                      help='Directory to place the generated tarball.')
-  parser.add_argument('--out-file', default=DEFAULT_NAME,
-                      help='The name to give to the tarball. '
-                           'Defaults to %(default)s.')
-  options = parser.parse_args(argv)
+    """Parse args, and run environment-independent checks."""
+    parser = commandline.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "--board", required=True, help="The board to generate the sysroot for."
+    )
+    parser.add_argument(
+        "--package",
+        required=True,
+        help="The packages to generate the sysroot for.",
+    )
+    parser.add_argument(
+        "--deps-only",
+        action="store_true",
+        default=False,
+        help="Build dependencies only.",
+    )
+    parser.add_argument(
+        "--out-dir",
+        type="path",
+        required=True,
+        help="Directory to place the generated tarball.",
+    )
+    parser.add_argument(
+        "--out-file",
+        default=DEFAULT_NAME,
+        help="The name to give to the tarball. " "Defaults to %(default)s.",
+    )
+    options = parser.parse_args(argv)
 
-  options.out_file %= {
-      'package': options.package.split()[0].replace(PACKAGE_SEPARATOR, '_'),
-  }
+    options.out_file %= {
+        "package": options.package.split()[0].replace(PACKAGE_SEPARATOR, "_"),
+    }
 
-  return options
+    return options
 
 
 class GenerateSysroot(object):
-  """Wrapper for generation functionality."""
+    """Wrapper for generation functionality."""
 
-  PARALLEL_EMERGE = os.path.join(constants.CHROMITE_BIN_DIR, 'parallel_emerge')
+    PARALLEL_EMERGE = os.path.join(
+        constants.CHROMITE_BIN_DIR, "parallel_emerge"
+    )
 
-  def __init__(self, sysroot, options):
-    """Initialize
+    def __init__(self, sysroot, options):
+        """Initialize
 
-    Args:
-      sysroot: Path to sysroot.
-      options: Parsed options.
-    """
-    self.sysroot = sysroot
-    self.options = options
-    self.extra_env = {'ROOT': self.sysroot, 'USE': os.environ.get('USE', '')}
+        Args:
+          sysroot: Path to sysroot.
+          options: Parsed options.
+        """
+        self.sysroot = sysroot
+        self.options = options
+        self.extra_env = {
+            "ROOT": self.sysroot,
+            "USE": os.environ.get("USE", ""),
+        }
 
-  def _Emerge(self, *args, **kwargs):
-    """Emerge the given packages using parallel_emerge."""
-    cmd = [self.PARALLEL_EMERGE, '--board=%s' % self.options.board,
-           '--usepkgonly', '--noreplace'] + list(args)
-    kwargs.setdefault('extra_env', self.extra_env)
-    cros_build_lib.sudo_run(cmd, **kwargs)
+    def _Emerge(self, *args, **kwargs):
+        """Emerge the given packages using parallel_emerge."""
+        cmd = [
+            self.PARALLEL_EMERGE,
+            "--board=%s" % self.options.board,
+            "--usepkgonly",
+            "--noreplace",
+        ] + list(args)
+        kwargs.setdefault("extra_env", self.extra_env)
+        cros_build_lib.sudo_run(cmd, **kwargs)
 
-  def _WriteConfig(self, sysroot):
-    sysroot.WriteConfig(sysroot.GenerateBoardSetupConfig(self.options.board))
-    # For the config to be correctly read, a stub make.conf is needed.
-    # pylint: disable=protected-access
-    make_conf_path = os.path.join(self.sysroot, sysroot_lib._MAKE_CONF)
-    assert not os.path.exists(make_conf_path), 'Expecting an empty sysroot.'
-    osutils.WriteFile(os.path.join(make_conf_path),
-                      'source make.conf.board_setup', makedirs=True, sudo=True)
+    def _WriteConfig(self, sysroot):
+        sysroot.WriteConfig(
+            sysroot.GenerateBoardSetupConfig(self.options.board)
+        )
+        # For the config to be correctly read, a stub make.conf is needed.
+        # pylint: disable=protected-access
+        make_conf_path = os.path.join(self.sysroot, sysroot_lib._MAKE_CONF)
+        assert not os.path.exists(make_conf_path), "Expecting an empty sysroot."
+        osutils.WriteFile(
+            os.path.join(make_conf_path),
+            "source make.conf.board_setup",
+            makedirs=True,
+            sudo=True,
+        )
 
-  def _InstallToolchain(self):
-    # Create the sysroot's config.
-    sysroot = sysroot_lib.Sysroot(self.sysroot)
-    self._WriteConfig(sysroot)
-    toolchain.InstallToolchain(sysroot, configure=False)
+    def _InstallToolchain(self):
+        # Create the sysroot's config.
+        sysroot = sysroot_lib.Sysroot(self.sysroot)
+        self._WriteConfig(sysroot)
+        toolchain.InstallToolchain(sysroot, configure=False)
 
-  def _InstallKernelHeaders(self):
-    self._Emerge('sys-kernel/linux-headers')
+    def _InstallKernelHeaders(self):
+        self._Emerge("sys-kernel/linux-headers")
 
-  def _InstallBuildDependencies(self):
-    # Calculate buildtime deps that are not runtime deps.
-    raw_sysroot = build_target_lib.get_default_sysroot_path(self.options.board)
-    packages = []
-    if not self.options.deps_only:
-      packages = self.options.package.split()
-    else:
-      for pkg in self.options.package.split():
-        cmd = ['qdepends', '-q', '-C', pkg]
-        output = cros_build_lib.run(
-            cmd, extra_env={'ROOT': raw_sysroot}, capture_output=True,
-            encoding='utf-8').stdout
+    def _InstallBuildDependencies(self):
+        # Calculate buildtime deps that are not runtime deps.
+        raw_sysroot = build_target_lib.get_default_sysroot_path(
+            self.options.board
+        )
+        packages = []
+        if not self.options.deps_only:
+            packages = self.options.package.split()
+        else:
+            for pkg in self.options.package.split():
+                cmd = ["qdepends", "-q", "-C", pkg]
+                output = cros_build_lib.run(
+                    cmd,
+                    extra_env={"ROOT": raw_sysroot},
+                    capture_output=True,
+                    encoding="utf-8",
+                ).stdout
 
-        if output.count('\n') > 1:
-          raise AssertionError('Too many packages matched for given pattern')
+                if output.count("\n") > 1:
+                    raise AssertionError(
+                        "Too many packages matched for given pattern"
+                    )
 
-        # qdepend outputs "package: deps", so only grab the deps.
-        deps = output.partition(':')[2].split()
-        packages.extend(deps)
-    # Install the required packages.
-    if packages:
-      self._Emerge(*packages)
+                # qdepend outputs "package: deps", so only grab the deps.
+                deps = output.partition(":")[2].split()
+                packages.extend(deps)
+        # Install the required packages.
+        if packages:
+            self._Emerge(*packages)
 
-  def _CreateTarball(self):
-    tarball_path = os.path.join(self.options.out_dir, self.options.out_file)
-    cros_build_lib.CreateTarball(tarball_path, self.sysroot, sudo=True)
+    def _CreateTarball(self):
+        tarball_path = os.path.join(self.options.out_dir, self.options.out_file)
+        cros_build_lib.CreateTarball(tarball_path, self.sysroot, sudo=True)
 
-  def Perform(self):
-    """Generate the sysroot."""
-    self._InstallToolchain()
-    self._InstallKernelHeaders()
-    self._InstallBuildDependencies()
-    self._CreateTarball()
+    def Perform(self):
+        """Generate the sysroot."""
+        self._InstallToolchain()
+        self._InstallKernelHeaders()
+        self._InstallBuildDependencies()
+        self._CreateTarball()
 
 
 def FinishParsing(options):
-  """Run environment dependent checks on parsed args."""
-  target = os.path.join(options.out_dir, options.out_file)
-  if os.path.exists(target):
-    cros_build_lib.Die('Output file %r already exists.' % target)
+    """Run environment dependent checks on parsed args."""
+    target = os.path.join(options.out_dir, options.out_file)
+    if os.path.exists(target):
+        cros_build_lib.Die("Output file %r already exists." % target)
 
-  if not os.path.isdir(options.out_dir):
-    cros_build_lib.Die(
-        'Non-existent directory %r specified for --out-dir' % options.out_dir)
+    if not os.path.isdir(options.out_dir):
+        cros_build_lib.Die(
+            "Non-existent directory %r specified for --out-dir"
+            % options.out_dir
+        )
 
 
 def main(argv):
-  options = ParseCommandLine(argv)
-  FinishParsing(options)
+    options = ParseCommandLine(argv)
+    FinishParsing(options)
 
-  cros_build_lib.AssertInsideChroot()
+    cros_build_lib.AssertInsideChroot()
 
-  with sudo.SudoKeepAlive(ttyless_sudo=False):
-    with osutils.TempDir(set_global=True, sudo_rm=True) as tempdir:
-      sysroot = os.path.join(tempdir, SYSROOT)
-      os.mkdir(sysroot)
-      GenerateSysroot(sysroot, options).Perform()
+    with sudo.SudoKeepAlive(ttyless_sudo=False):
+        with osutils.TempDir(set_global=True, sudo_rm=True) as tempdir:
+            sysroot = os.path.join(tempdir, SYSROOT)
+            os.mkdir(sysroot)
+            GenerateSysroot(sysroot, options).Perform()