hboutemy commented on code in PR #24:
URL: 
https://github.com/apache/maven-source-plugin/pull/24#discussion_r1542096039


##########
src/main/java/org/apache/maven/plugins/source/AbstractSourceJarMojo.java:
##########
@@ -303,15 +304,24 @@ protected void packageSources(List<MavenProject> 
theProjects) throws MojoExecuti
             }
 
             if (attach) {
+                boolean requiresAttach = true;
                 for (Artifact attachedArtifact : 
project.getAttachedArtifacts()) {
-                    if (isAlreadyAttached(attachedArtifact, project, 
getClassifier())) {
-                        getLog().error("We have duplicated artifacts 
attached.");
-                        throw new MojoExecutionException("Presumably you have 
configured maven-source-plugin "
-                                + "to execute twice in your build. You have to 
configure a classifier "
-                                + "for at least one of them.");
+                    Artifact previouslyAttached = 
getPreviouslyAttached(attachedArtifact, project, getClassifier());
+                    if (previouslyAttached != null) {
+                        if (!outputFile.equals(previouslyAttached.getFile())) {

Review Comment:
   then do nothing? keep ignoring? keep saying "fixed in Maven 4"? keep saying 
"don't do"? keep saying "if you do that, you are wrong"?
   we're staying in circle being a pain in the ass of users who just conclude: 
"last working version was 3.2.1"



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