scripts: west_commands: add JSON excepthook

To be used with west commands implementing a jsonschema based protocol.

Signed-off-by: Gerard Marull-Paretas <[email protected]>

CODEOWNERS

@@ -656,6 +656,7 @@
 /scripts/ncs-toolchain-version-minimum.txt @nrfconnect/ncs-co-build-system @nrfconnect/ncs-ci
 /scripts/tools-versions-*.txt             @nrfconnect/ncs-co-build-system @nrfconnect/ncs-ci
 /scripts/requirements-*.txt               @nrfconnect/ncs-co-build-system @nrfconnect/ncs-ci
+/scripts/west_commands/utils/             @gmarull
 /scripts/west_commands/create_board/      @gmarull
 /scripts/west_commands/ncs-bicr.py        @gmarull
 /scripts/west_commands/ncs-board-actions.py @gmarull

scripts/west_commands/utils/__init__.py

@@ -0,0 +1,24 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+import json
+import sys
+import traceback
+
+
+def install_json_excepthook():
+    def excepthook(type, value, tb):
+        output = {
+            "errors": [
+                {
+                    "type": type.__name__,
+                    "message": str(value),
+                    "traceback": "".join(traceback.format_tb(tb))
+                }
+            ]
+        }
+
+        print(json.dumps(output, indent=2), file=sys.stderr)
+        sys.exit(1)
+
+    sys.excepthook = excepthook