scripts: flash: Add west config for flash skip rebuild

Add a west config option to skip rebuilds by default or not when doing
west flash.

Signed-off-by: Declan Snyder <[email protected]>

Author: decsny

doc/develop/west/build-flash-debug.rst

@@ -551,6 +551,22 @@ only the image from this domain::
 
 .. _west-debugging:
 
+Configuration Options
+=====================
+
+You can :ref:`configure <west-config-cmd>` ``west flash`` using these options.
+
+.. NOTE: docs authors: keep this table sorted alphabetically
+
+.. list-table::
+   :widths: 10 30
+   :header-rows: 1
+
+   * - Option
+     - Description
+   * - ``flash.skip-rebuild``
+     - Boolean, default ``false``. If ``true``, do not rebuild on west flash.
+
 Debugging: ``west debug``, ``west debugserver``
 ***********************************************
 

scripts/west_commands/run_common.py

@@ -242,9 +242,13 @@ def do_run_common(command, user_args, user_runner_args, domain_file=None):
             import_from_path(
                 module.meta.get("name", "runners_ext"), Path(module.project) / runner["file"]
             )
-
     build_dir = get_build_dir(user_args)
-    if not user_args.skip_rebuild:
+
+    # Check if skip-rebuild is configured globally
+    skip_rebuild_config = config.get('flash', 'skip-rebuild', fallback='false')
+    skip_rebuild = user_args.skip_rebuild or (skip_rebuild_config.lower() == 'true')
+
+    if not skip_rebuild:
         rebuild(command, build_dir, user_args)
 
     domains = get_domains_to_process(build_dir, user_args, domain_file)