Do not add option "config-output-dir" when conflicting options are present

Author: hannes-dohrn

native-maven-plugin/src/main/java/org/graalvm/buildtools/maven/NativeExtension.java

@@ -55,6 +55,7 @@
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.function.BiConsumer;
@@ -85,7 +86,12 @@ static String testIdsDirectory(String baseDir) {
 
     static String buildAgentArgument(String baseDir, Context context, List<String> agentOptions) {
         List<String> options = new ArrayList<>(agentOptions);
-        options.add("config-output-dir=" + agentOutputDirectoryFor(baseDir, context));
+        // Do not add config-output-dir when a conflicting option is already present. Otherwise this happens:
+        // native-image-agent: can only once specify exactly one of trace-output=, config-output-dir= or config-merge-dir=.
+        final List<String> mutuallyExclusiveOptions = Arrays.asList("config-output-dir", "trace-output", "config-merge-dir");
+        if (agentOptions.stream().allMatch(option -> mutuallyExclusiveOptions.stream().noneMatch(option::startsWith))) {
+            options.add("config-output-dir=" + agentOutputDirectoryFor(baseDir, context));
+         }
         return "-agentlib:native-image-agent=" + String.join(",", options);
     }