Fix zap-gui and add zap-install

scripts/west/west-commands.yml

@@ -1,5 +1,10 @@
 # Keep the help strings in sync with the values in the .py files!
 west-commands:
+  - file: scripts/west/zap_install.py
+    commands:
+      - name: zap-install
+        class: ZapInstall
+        help: Install Matter ZCL Advanced Platform (ZAP) GUI
   - file: scripts/west/zap_generate.py
     commands:
       - name: zap-generate

scripts/west/zap_gui.py

@@ -50,6 +50,10 @@ def do_run(self, args, unknown_args):
         zap_file_path = args.zap_file or find_zap()
         zcl_json_path = Path(args.zcl_json).absolute() if args.zcl_json else default_zcl_path
 
+        if zap_file_path is None:
+            log.err("ZAP file not found!")
+            return
+
         if args.clusters:
             # If the user provided the clusters and the zcl.json file provided by -j argument does not exist
             # we will create a new zcl.json file according to the base zcl.json file in default_zcl_path.

scripts/west/zap_install.py

@@ -0,0 +1,35 @@
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+import argparse
+from textwrap import dedent
+from west.commands import WestCommand
+from zap_common import existing_dir_path, ZapInstaller, DEFAULT_MATTER_PATH
+
+
+class ZapInstall(WestCommand):
+
+    def __init__(self):
+        super().__init__(
+            'zap-install',
+            'Install Matter ZCL Advanced Platform (ZAP) GUI',
+            dedent('''
+            Install Matter ZCL Advanced Platform (ZAP) GUI.
+
+            The ZAP GUI in a node.js tool for configuring the data model
+            of a Matter application, which defines clusters, commands,
+            attributes and events enabled for the given application.'''))
+
+    def do_add_parser(self, parser_adder):
+        parser = parser_adder.add_parser(self.name,
+                                         help=self.help,
+                                         formatter_class=argparse.RawDescriptionHelpFormatter,
+                                         description=self.description)
+        parser.add_argument('-m', '--matter-path', type=existing_dir_path,
+                            default=DEFAULT_MATTER_PATH, help=f'Path to Matter SDK. Default is set to {DEFAULT_MATTER_PATH}')
+        return parser
+
+    def do_run(self, args, unknown_args):
+        zap_installer = ZapInstaller(args.matter_path)
+        zap_installer.update_zap_if_needed()