yocto-compat-layer.py: Add --dependency argument

When processing a large number of items, there are times that it would be
nice to be able to pass in a series of layers that can be used as dependencies
for the layer that is being scanned.  This avoids the significant overhead
of processing all of the layers to compatibility.

(From OE-Core rev: 57fc8a9771174b7d0533a42c045053adefa537a8)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/yocto-compat-layer.py

@@ -47,6 +47,8 @@ def main():
             help='Layer to test compatibility with Yocto Project')
     parser.add_argument('-o', '--output-log',
             help='File to output log (optional)', action='store')
+    parser.add_argument('--dependency', nargs="+",
+            help='Layers to process for dependencies', action='store')
     parser.add_argument('-n', '--no-auto', help='Disable auto layer discovery',
             action='store_true')
     parser.add_argument('-d', '--debug', help='Enable debug output',
@@ -80,6 +82,11 @@ def main():
     if not layers:
         logger.error("Fail to detect layers")
         return 1
+    if args.dependency:
+        dep_layers = detect_layers(args.dependency, args.no_auto)
+        dep_layers = dep_layers + layers
+    else:
+        dep_layers = layers
 
     logger.info("Detected layers:")
     for layer in layers:
@@ -125,7 +132,8 @@ def main():
 
         shutil.copyfile(bblayersconf + '.backup', bblayersconf)
 
-        if not add_layer(bblayersconf, layer, layers, logger):
+        if not add_layer(bblayersconf, layer, dep_layers, logger):
+            logger.info('Skipping %s due to missing dependencies.' % layer['name'])
             results[layer['name']] = None
             results_status[layer['name']] = 'SKIPPED (Missing dependencies)'
             layers_tested = layers_tested + 1