added classifier support

src/main/java/com/inteligr8/alfresco/amp/AmpMojo.java

@@ -63,6 +63,9 @@ public class AmpMojo extends AbstractMojo implements ArtifactResolutionCallback
 	
 	@Requirement
 	private ArtifactResolver artifactResolver;
+
+	@Parameter( property = "classifier", required = false )
+	protected String classifier;
 	
 	@Parameter( property = "outputFile", required = true, defaultValue = "${project.build.directory}/${project.artifactId}-${project.version}.amp" )
 	protected String outputAmpFile;
@@ -103,6 +106,13 @@ public class AmpMojo extends AbstractMojo implements ArtifactResolutionCallback
     	}
     	this.getLog().debug("Executing AMP packaging");
     	
+    	this.classifier = StringUtils.trimToNull(this.classifier);
+    	if (this.classifier != null) {
+    		this.getLog().info("A classifier was specified; injecting classifier into module and output artifact names");
+    		this.outputAmpFile = this.injectClassifier(this.outputAmpFile);
+    		this.moduleJarFile = this.injectClassifier(this.moduleJarFile);
+    	}
+    	
     	this.normalize();
     	
     	File ampFile = this.getOutputFile();
@@ -134,6 +144,22 @@ public class AmpMojo extends AbstractMojo implements ArtifactResolutionCallback
     	}
     }
     
+    private String injectClassifier(String filename) {
+    	int lastDot = filename.lastIndexOf('.');
+    	if (lastDot < 0)
+    		throw new IllegalArgumentException();
+    	
+    	int lastDash = filename.lastIndexOf('-', lastDot-1);
+    	if (lastDash > 0) {
+    		// see if the classifier was already specified
+    		String possibleClassifier = filename.substring(lastDash+1, lastDot);
+    		if (this.classifier.equals(possibleClassifier))
+    			return filename;
+    	}
+    	
+    	return filename.substring(0, lastDot) + '-' + this.classifier + filename.substring(lastDot);
+    }
+    
     private void normalize() {
     	this.outputAmpFile = StringUtils.trimToNull(this.outputAmpFile);
     	this.moduleJarFile = StringUtils.trimToNull(this.moduleJarFile);