wic: fix pylint warning unused-variable

Removed or reworked code with unused variables.

(From OE-Core rev: 3644b9f5ca25dfc61d4f5eda0f073c8a879b492b)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/engine.py

@@ -43,9 +43,7 @@ def verify_build_env():
 
     Returns True if it is, false otherwise
     """
-    try:
-        builddir = os.environ["BUILDDIR"]
-    except KeyError:
+    if not os.environ.get("BUILDDIR"):
         print "BUILDDIR not found, exiting. (Did you forget to source oe-init-build-env?)"
         sys.exit(1)
 

scripts/lib/wic/imager/baseimager.py

@@ -132,9 +132,9 @@ class BaseImageCreator(object):
                 os.makedirs(self.workdir)
             self.__builddir = tempfile.mkdtemp(dir=self.workdir,
                                                prefix="imgcreate-")
-        except OSError, (err, msg):
+        except OSError as err:
             raise CreatorError("Failed create build directory in %s: %s" %
-                               (self.tmpdir, msg))
+                               (self.tmpdir, err))
 
     def __setup_tmpdir(self):
         if not self.enabletmpfs:

scripts/lib/wic/imager/direct.py

@@ -327,7 +327,7 @@ class DirectImageCreator(BaseImageCreator):
 
         parts = self._get_parts()
 
-        for disk_name, disk in self.__image.disks.items():
+        for disk_name in self.__image.disks:
             extension = "direct" + {"gzip": ".gz",
                                     "bzip2": ".bz2",
                                     "xz": ".xz",

scripts/lib/wic/plugin.py

@@ -124,12 +124,7 @@ class PluginMgr(object):
 
         self.append_dirs(plugins_dir)
 
-        plugins = []
-
-        for _source_name, klass in self.get_plugins('source').iteritems():
-            plugins.append(_source_name)
-
-        return plugins
+        return self.get_plugins('source')
 
 
     def get_source_plugin_methods(self, source_name, methods):

scripts/lib/wic/plugins/source/bootimg-efi.py

@@ -45,12 +45,6 @@ class BootimgEFIPlugin(SourcePlugin):
         """
         Create loader-specific (grub-efi) config
         """
-        splash = os.path.join(cr_workdir, "/EFI/boot/splash.jpg")
-        if os.path.exists(splash):
-            splashline = "menu background splash.jpg"
-        else:
-            splashline = ""
-
         options = cr.ks.handler.bootloader.appendLine
 
         grubefi_conf = ""

scripts/wic

@@ -308,7 +308,7 @@ def main(argv):
 
     parser.disable_interspersed_args()
 
-    (options, args) = parser.parse_args(argv)
+    args = parser.parse_args(argv)[1]
 
     if len(args):
         if args[0] == "help":