pylint: Add miscellaneous checksv6.4.0-rc1-packaging

Add comment about disabled checks in pylint hook and enable all default pylint checks except for those.
Address these miscellaneous pylint warnings:
-C0123: Use isinstance() rather than type() for a typecheck. (unidiomatic-typecheck)
-R1714: Consider merging these comparisons with "in" (consider-using-in)
-R1722: Consider using sys.exit() (consider-using-sys-exit)
-C0206: Consider iterating with .items() (consider-using-dict-items)
-R1710: All return statements in a function should return an expression. (inconsistent-return-statements)
-W0707: Consider explicitly re-raising using the 'from' keyword (raise-missing-from)
-W1510: Using subprocess.run without explicitly set `check` is not recommended. (subprocess-run-check)
-W0102: Dangerous default value as argument (dangerous-default-value)
-W1508: os.getenv default type is builtins.bool. Expected str or None. (invalid-envvar-default)
-W0212: Access to a protected member of a client class (protected-access)
-W0631: Using possibly undefined loop variable (undefined-loop-variable)
-W1113: Keyword argument before variable positional arguments list in the definition of __init__ function (keyword-arg-before-vararg)
-W0201: Attribute defined outside __init__ (attribute-defined-outside-init)
-W0221: Number of parameters in overridden method differ (arguments-differ)
-C0202: Class method should have 'cls' as first argument (bad-classmethod-argument)
-W1505: Using deprecated method currentThread() (deprecated-method)
-R1707: Disallow trailing comma tuple (trailing-comma-tuple)
-W0603: Using the global statement (global-statement)
-W0602: Using global for 'OUTPUT_STATES' but no assignment is done (global-variable-not-assigned)
-C2801: Unnecessarily calls dunder method __contains__. Use in keyword.

Change-Id: Ia1c6ff3f6c328a94b40a1c0f11c83151abc91423
Reviewed-by: Iikka Eklund <iikka.eklund@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/packaging-tools/sdkcomponent.py b/packaging-tools/sdkcomponent.py
index 0c32efaf6..0594736f5 100644
--- a/packaging-tools/sdkcomponent.py
+++ b/packaging-tools/sdkcomponent.py
@@ -82,6 +82,7 @@ class SdkComponent:
                     return '*** Archive check fail! ***\n*** Unable to locate archive: ' + self.archive_uri
             elif not os.path.isfile(self.archive_uri):
                 return '*** Archive check fail! ***\n*** Unable to locate archive: ' + self.archive_uri
+            return None
 
         def path_leaf(self, path):
             head, tail = ntpath.split(path)
@@ -134,7 +135,7 @@ class SdkComponent:
             self.version = self.version.replace(item[0], item[1])
 
     def is_root_component(self):
-        if self.root_component == 'yes' or self.root_component == 'true':
+        if self.root_component in ('yes', 'true'):
             return True
         return False