Buuhuu commented on a change in pull request #46:
URL: 
https://github.com/apache/jackrabbit-filevault-package-maven-plugin/pull/46#discussion_r533243860



##########
File path: 
src/main/java/org/apache/jackrabbit/filevault/maven/packaging/FormatDocviewXmlMojo.java
##########
@@ -109,7 +111,14 @@ public void execute() throws MojoExecutionException, 
MojoFailureException {
             getLog().info("Skip executing mojo 'format-xml' for incremental 
builds as parameter 'enableForIncrementalBuilds' is set to 'false'");
         } else {
             File jcrSourceDirectory = 
AbstractSourceAndMetadataPackageMojo.getFirstExistingDirectory(jcrRootSourceDirectory);
-            executeInternal(jcrSourceDirectory);
+            if (jcrSourceDirectory != null) {
+                executeInternal(jcrSourceDirectory);
+            } else {
+                if (getLog().isDebugEnabled()) {
+                    getLog().debug("None of the configured 
jcrRootSourceDirectory directories exists, skipping: " +

Review comment:
       afaik `org.apache.maven.plugin.logging.Log` does not support placeholder 
replacement, thats why the check if `isDebugEnabled()`
   
   Other Mojos may do the configuration validation. I don't see this being 
necessary in the bounded context for "format xml". So said the debug log level 
is correct from my perspective as "if the directory does not exist, do 
nothing". 
   
   This change addressees the execution of the `format-xml` goal from command 
line and even if unlikely it may not run in a maven project at all. So I would 
rather not depend on the packaging here.




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