devtool: sdk-update: add option to skip preparation step

For debugging purposes it's useful to be able to skip the preparation
step so you can inspect what the state of the build system is first.

(From OE-Core rev: 0bba4b5afd2ce2c3a79445eee886979a77f1a4d8)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 10 insertions, 8 deletions

diff --git a/scripts/lib/devtool/sdk.py b/scripts/lib/devtool/sdk.py
index 2d9d911e4c..7faefabad8 100644
--- a/scripts/lib/devtool/sdk.py
+++ b/scripts/lib/devtool/sdk.py
@@ -173,14 +173,15 @@ def sdk_update(args, config, basepath, workspace):
         with open(os.path.join(basepath, 'conf/local.conf'), 'a') as f:
             f.write('SSTATE_MIRRORS_append = " file://.* %s/sstate-cache/PATH \\n "\n' % updateserver)
 
-    # Run bitbake command for the whole SDK
-    sdk_targets = config.get('SDK', 'sdk_targets')
-    logger.info("Executing 'bitbake %s' ... (This may take some time.)" % sdk_targets)
-    try:
-        exec_build_env_command(config.init_path, basepath, 'bitbake %s' % sdk_targets)
-    except:
-        logger.error('bitbake %s failed' % sdk_targets)
-        return -1
+    if not args.skip_prepare:
+        # Run bitbake command for the whole SDK
+        sdk_targets = config.get('SDK', 'sdk_targets')
+        logger.info("Preparing build system... (This may take some time.)")
+        try:
+            exec_build_env_command(config.init_path, basepath, 'bitbake %s' % sdk_targets)
+        except:
+            logger.error('bitbake %s failed' % sdk_targets)
+            return -1
     return 0
 
 def register_commands(subparsers, context):
@@ -188,4 +189,5 @@ def register_commands(subparsers, context):
     if context.fixed_setup:
         parser_sdk = subparsers.add_parser('sdk-update', help='Update SDK components from a nominated location')
         parser_sdk.add_argument('updateserver', help='The update server to fetch latest SDK components from', nargs='?')
+        parser_sdk.add_argument('--skip-prepare', action="store_true", help='Skip re-preparing the build system after updating (for debugging only)')
         parser_sdk.set_defaults(func=sdk_update)