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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/install_toolchain.py b/scripts/install_toolchain.py
index d83fb30..0e0c7e1 100644
--- a/scripts/install_toolchain.py
+++ b/scripts/install_toolchain.py
@@ -15,59 +15,78 @@
 
 
 def GetParser():
-  """Build the argument parser."""
-  parser = commandline.ArgumentParser(description=__doc__)
+    """Build the argument parser."""
+    parser = commandline.ArgumentParser(description=__doc__)
 
-  parser.add_argument('--noconfigure', dest='configure', default=True,
-                      action='store_false',
-                      help='Disable updating config files in <sysroot>/etc '
-                           'after installation.')
-  parser.add_argument('--force', default=False, action='store_true',
-                      help='Install toolchain even if already up to date.')
-  parser.add_argument('--toolchain',
-                      help='Toolchain. For example: i686-pc-linux-gnu, '
-                           'armv7a-softfloat-linux-gnueabi.')
-  parser.add_argument('--sysroot', type='path', required=True,
-                      help='The sysroot to install the toolchain for.')
+    parser.add_argument(
+        "--noconfigure",
+        dest="configure",
+        default=True,
+        action="store_false",
+        help="Disable updating config files in <sysroot>/etc "
+        "after installation.",
+    )
+    parser.add_argument(
+        "--force",
+        default=False,
+        action="store_true",
+        help="Install toolchain even if already up to date.",
+    )
+    parser.add_argument(
+        "--toolchain",
+        help="Toolchain. For example: i686-pc-linux-gnu, "
+        "armv7a-softfloat-linux-gnueabi.",
+    )
+    parser.add_argument(
+        "--sysroot",
+        type="path",
+        required=True,
+        help="The sysroot to install the toolchain for.",
+    )
 
-  return parser
+    return parser
 
 
 def _GetToolchain(toolchain_name, sysroot):
-  """Get the toolchain value or exit with an error message."""
-  if toolchain_name:
-    # Use the CLI argument when provided.
+    """Get the toolchain value or exit with an error message."""
+    if toolchain_name:
+        # Use the CLI argument when provided.
+        return toolchain_name
+
+    # Fetch the value from the sysroot.
+    toolchain_name = sysroot.GetStandardField(sysroot_lib.STANDARD_FIELD_CHOST)
+    if not toolchain_name:
+        cros_build_lib.Die(
+            "No toolchain specified in the sysroot or command line."
+        )
+
     return toolchain_name
 
-  # Fetch the value from the sysroot.
-  toolchain_name = sysroot.GetStandardField(sysroot_lib.STANDARD_FIELD_CHOST)
-  if not toolchain_name:
-    cros_build_lib.Die('No toolchain specified in the sysroot or command line.')
-
-  return toolchain_name
-
 
 def _ParseArgs(argv):
-  """Parse and validate arguments."""
-  parser = GetParser()
-  opts = parser.parse_args(argv)
+    """Parse and validate arguments."""
+    parser = GetParser()
+    opts = parser.parse_args(argv)
 
-  # Expand the sysroot path to a sysroot object.
-  opts.sysroot = sysroot_lib.Sysroot(opts.sysroot)
-  # Make sure the toolchain value reflects the toolchain we will be using.
-  opts.toolchain = _GetToolchain(opts.toolchain, opts.sysroot)
+    # Expand the sysroot path to a sysroot object.
+    opts.sysroot = sysroot_lib.Sysroot(opts.sysroot)
+    # Make sure the toolchain value reflects the toolchain we will be using.
+    opts.toolchain = _GetToolchain(opts.toolchain, opts.sysroot)
 
-  opts.Freeze()
-  return opts
+    opts.Freeze()
+    return opts
 
 
 def main(argv):
-  cros_build_lib.AssertInsideChroot()
+    cros_build_lib.AssertInsideChroot()
 
-  opts = _ParseArgs(argv)
-  try:
-    toolchain.InstallToolchain(sysroot=opts.sysroot,
-                               toolchain=opts.toolchain,
-                               force=opts.force, configure=opts.configure)
-  except (toolchain.Error, cros_build_lib.RunCommandError, ValueError) as e:
-    cros_build_lib.Die(e)
+    opts = _ParseArgs(argv)
+    try:
+        toolchain.InstallToolchain(
+            sysroot=opts.sysroot,
+            toolchain=opts.toolchain,
+            force=opts.force,
+            configure=opts.configure,
+        )
+    except (toolchain.Error, cros_build_lib.RunCommandError, ValueError) as e:
+        cros_build_lib.Die(e)