fix warnings generated by pylint

stages/io.weldr.ansible

@@ -1,7 +1,6 @@
 #!/usr/bin/python3
 
 import json
-import os
 import subprocess
 import sys
 
@@ -10,7 +9,8 @@ def main(tree, options):
     playbook = options["playbook"]
 
     with open("/tmp/inventory", "w") as f:
-        f.write(f"osbuild-tree ansible_connection=chroot ansible_host={tree} ansible_python_interpreter=/usr/bin/python3")
+        f.write(f"osbuild-tree ansible_connection=chroot ansible_host={tree} "
+                f"ansible_python_interpreter=/usr/bin/python3")
 
     with open("/tmp/playbook.yml", "w") as f:
         if isinstance(playbook, str):
@@ -29,5 +29,5 @@ def main(tree, options):
 
 if __name__ == '__main__':
     args = json.load(sys.stdin)
-    r = main(args["tree"], args["options"])
-    sys.exit(r)
+    ret = main(args["tree"], args["options"])
+    sys.exit(ret)

stages/io.weldr.dnf

@@ -1,7 +1,6 @@
 #!/usr/bin/python3
 
 import json
-import os
 import subprocess
 import sys
 
@@ -17,13 +16,13 @@ def main(tree, options):
         for repoid, repo in repos.items():
             conf.write(f"[{repoid}]\n")
             for key, value in repo.items():
-                if type(value) == str:
+                if isinstance(value, str):
                     s = value
-                elif type(value) == list:
+                elif isinstance(value, list):
                     s = " ".join(value)
-                elif type(value) == bool:
+                elif isinstance(value, bool):
                     s = "1" if value else "0"
-                elif type(value) == int:
+                elif isinstance(value, int):
                     s = str(value)
                 else:
                     print(f"unkown type for `{key}`: {value} ({type(value)})")

stages/io.weldr.grub2

@@ -3,7 +3,6 @@
 import json
 import os
 import sys
-import tempfile
 
 def main(tree, options):
     root_fs_uuid = options["root_fs_uuid"]

stages/io.weldr.noop

@@ -3,7 +3,7 @@
 import json
 import sys
 
-def main(tree, options):
+def main(_tree, options):
     print("Not doing anything with these options:", json.dumps(options))
 
 if __name__ == '__main__':