ignore duplicate entries

Author: stefanseifert

tooling/conga-aem-maven-plugin/src/main/java/io/wcm/devops/conga/plugins/aem/maven/allpackage/AllPackageBuilder.java

@@ -297,6 +297,7 @@ public boolean build(Map<String, String> properties) throws IOException {
 
     // build content package
     // if auto dependencies is active: build separate "dependency chains" between mutable and immutable packages
+    Set<String> packageFilePaths = new HashSet<>();
     try (ContentPackage contentPackage = builder.build(targetFile)) {
       for (ContentPackageFileSet fileSet : contentPackageFileSets) {
         for (String environmentRunMode : fileSet.getEnvironmentRunModes()) {
@@ -322,9 +323,16 @@ public boolean build(Map<String, String> properties) throws IOException {
             try {
               for (TemporaryContentPackageFile processedFile : processedFiles) {
                 String path = buildPackagePath(processedFile, rootPath, environmentRunMode);
-                contentPackage.addFile(path, processedFile.getFile());
-                if (log.isDebugEnabled()) {
-                  log.debug("  Add " + processedFile.getPackageInfoWithDependencies());
+                if (packageFilePaths.add(path)) {
+                  contentPackage.addFile(path, processedFile.getFile());
+                  if (log.isDebugEnabled()) {
+                    log.debug("  Add " + processedFile.getPackageInfoWithDependencies());
+                  }
+                }
+                else {
+                  if (log.isDebugEnabled()) {
+                    log.debug("  Ignore duplicate: " + processedFile.getPackageInfoWithDependencies());
+                  }
                 }
               }
             }