ci: update check_compliance to not create duplicate lines in Kconfig

check_compliance generates Kconfig files for sourcing board and soc
Kconfig tree in order to run compliance.

Each board and soc generated a source entry, however several socs are
using same soc dir and thus multiple identical source lines where
created.

Use a set() to ensure unique folders before generating Kconfig files.
This ensures that each Kconfig file is only sourced once.
This improves both compliance as fewer lines needs to be written, as
well as improves Kconfiglib as fewer Kconfig files must be sourced, as
redundant sourcing is not avoided.

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>

scripts/ci/check_compliance.py

@@ -431,17 +431,18 @@ class KconfigCheck(ComplianceTest):
         root_args = argparse.Namespace(**{'soc_roots': [Path(ZEPHYR_BASE)]})
         v2_systems = list_hardware.find_v2_systems(root_args)
 
+        soc_folders = {soc.folder for soc in v2_systems.get_socs()}
         with open(kconfig_defconfig_file, 'w') as fp:
-            for soc in v2_systems.get_socs():
-                fp.write('osource "' + os.path.join(soc.folder, 'Kconfig.defconfig') + '"\n')
+            for folder in soc_folders:
+                fp.write('osource "' + os.path.join(folder, 'Kconfig.defconfig') + '"\n')
 
         with open(kconfig_soc_file, 'w') as fp:
-            for soc in v2_systems.get_socs():
-                fp.write('source "' + os.path.join(soc.folder, 'Kconfig.soc') + '"\n\n')
+            for folder in soc_folders:
+                fp.write('source "' + os.path.join(folder, 'Kconfig.soc') + '"\n')
 
         with open(kconfig_file, 'w') as fp:
-            for soc in v2_systems.get_socs():
-                fp.write('source "' + os.path.join(soc.folder, 'Kconfig') + '"\n')
+            for folder in soc_folders:
+                fp.write('source "' + os.path.join(folder, 'Kconfig') + '"\n')
 
         kconfig_file = os.path.join(kconfig_dir, 'arch', 'Kconfig')