Fix false warning in config schema validator (#6240)

Signed-off-by: Ben Sherman <bentshermann@gmail.com>

Author: bentsherman

modules/nextflow/src/main/groovy/nextflow/config/ConfigValidator.groovy

@@ -78,7 +78,7 @@ class ConfigValidator {
     void validate(ConfigObject config) {
         final flatConfig = config.flatten()
         for( String key : flatConfig.keySet() ) {
-            final names = key.tokenize('.')
+            final names = key.tokenize('.').findAll { name -> !isSelector(name) }
             if( names.first() == 'profiles' ) {
                 if( !names.isEmpty() ) names.remove(0)
                 if( !names.isEmpty() ) names.remove(0)
@@ -100,6 +100,15 @@ class ConfigValidator {
         }
     }
 
+    /**
+     * Determine whether a scope name is a process selector.
+     *
+     * @param name
+     */
+    private boolean isSelector(String name) {
+        return name.startsWith('withLabel:') || name.startsWith('withName:')
+    }
+
     /**
      * Determine whether a config option is defined in the schema.
      *

modules/nextflow/src/test/groovy/nextflow/config/ConfigValidatorTest.groovy

@@ -64,4 +64,23 @@ class ConfigValidatorTest extends Specification {
         !capture.toString().contains('the following environment variable in the config will be ignored: \'NXF_DEBUG\'')
     }
 
+    def 'should ignore process selectors' () {
+        given:
+        def config = new ConfigMap([
+            process: [
+                'withLabel:foobar': [
+                    cpus: 2
+                ],
+                'withName:foobar': [
+                    cpus: 2
+                ]
+            ]
+        ])
+
+        when:
+        new ConfigValidator().validate(config)
+        then:
+        !capture.toString().contains('Unrecognized config option')
+    }
+
 }