[nrf fromtree] scripts: west_commands: sign: Deprecate imgtool signing

Deprecates signing for imgtool using west sign

Signed-off-by: Jamie McCrae <[email protected]>
(cherry picked from commit dd7ce12)

Author: nordicjm

scripts/west_commands/sign.py

@@ -129,7 +129,7 @@ def do_add_parser(self, parser_adder):
         group = parser.add_argument_group('tool control options')
         group.add_argument('-t', '--tool', choices=['imgtool', 'rimage'],
                            help='''image signing tool name; imgtool and rimage
-                           are currently supported''')
+                           are currently supported (imgtool is deprecated)''')
         group.add_argument('-p', '--tool-path', default=None,
                            help='''path to the tool itself, if needed''')
         group.add_argument('-D', '--tool-data', default=None,
@@ -246,6 +246,8 @@ def sign(self, command, build_dir, build_conf, formats):
         args = command.args
         b = pathlib.Path(build_dir)
 
+        log.wrn("west sign using imgtool is deprecated and will be removed in a future release")
+
         imgtool = self.find_imgtool(command, args)
         # The vector table offset and application version are set in Kconfig:
         appver = self.get_cfg(command, build_conf, 'CONFIG_MCUBOOT_IMGTOOL_SIGN_VERSION')