From 62bc8146ba1c2fa34afc2e3ec0b30121ac5d8e53 Mon Sep 17 00:00:00 2001
From: Karl Heinz Marbaise <khmarbaise@apache.org>
Date: Wed, 7 Jun 2017 23:28:13 +0200
Subject: [PATCH] Fixed #34  o First implementation to report the plugin
 dependencies as well.

---
 .../DisplayDependencyUpdatesMojo.java         | 45 ++++++++++++++++++-
 1 file changed, 43 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/codehaus/mojo/versions/DisplayDependencyUpdatesMojo.java b/src/main/java/org/codehaus/mojo/versions/DisplayDependencyUpdatesMojo.java
index c8ab8f016e..0e732c233b 100644
--- a/src/main/java/org/codehaus/mojo/versions/DisplayDependencyUpdatesMojo.java
+++ b/src/main/java/org/codehaus/mojo/versions/DisplayDependencyUpdatesMojo.java
@@ -24,6 +24,7 @@
 import org.apache.maven.artifact.versioning.ArtifactVersion;
 import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
 import org.apache.maven.model.Dependency;
+import org.apache.maven.model.Plugin;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.MojoFailureException;
 import org.apache.maven.plugins.annotations.Mojo;
@@ -34,8 +35,6 @@
 import org.codehaus.mojo.versions.utils.DependencyComparator;
 import org.codehaus.plexus.util.StringUtils;
 
-import javax.xml.stream.XMLStreamException;
-
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
@@ -43,6 +42,8 @@
 import java.util.Set;
 import java.util.TreeSet;
 
+import javax.xml.stream.XMLStreamException;
+
 /**
  * Displays all dependencies that have newer versions available.
  *
@@ -79,6 +80,14 @@ public class DisplayDependencyUpdatesMojo
     @Parameter( property = "processDependencies", defaultValue = "true" )
     protected boolean processDependencies;
 
+    /**
+     * Whether to process the dependencies sections of plugins.
+     *
+     * @since 2.5
+     */
+    @Parameter( property = "processDependencies", defaultValue = "true" )
+    protected boolean processPluginDependencies;
+
     /**
      * Whether to show additional information such as dependencies that do not need updating.
      *
@@ -89,6 +98,22 @@ public class DisplayDependencyUpdatesMojo
 
     // --------------------- GETTER / SETTER METHODS ---------------------
 
+    private static Set<Dependency> extractDependenciesFromPlugins( List<Plugin> plugins )
+    {
+        Set<Dependency> result = new TreeSet( new DependencyComparator() );
+        for ( Plugin plugin : plugins )
+        {
+            if ( plugin.getDependencies() != null && !plugin.getDependencies().isEmpty() )
+            {
+                for ( Dependency pluginDependency : plugin.getDependencies() )
+                {
+                    result.add( pluginDependency );
+                }
+            }
+        }
+        return result;
+    }
+
     /**
      * Returns a set of dependencies where the dependencies which are defined in the dependency management section have
      * been filtered out.
@@ -139,6 +164,11 @@ public boolean isProcessingDependencies()
         return processDependencies;
     }
 
+    public boolean isProcessingPluginDependencies()
+    {
+        return processPluginDependencies;
+    }
+
     public boolean isVerbose()
     {
         return verbose;
@@ -214,6 +244,13 @@ public void execute()
             dependencies = removeDependencyManagment( dependencies, dependencyManagement );
         }
 
+        Set pluginDependencies = new TreeSet( new DependencyComparator() );
+
+        if ( isProcessingPluginDependencies() )
+        {
+            pluginDependencies = extractDependenciesFromPlugins( getProject().getBuildPlugins() );
+        }
+
         try
         {
             if ( isProcessingDependencyManagement() )
@@ -225,6 +262,10 @@ public void execute()
             {
                 logUpdates( getHelper().lookupDependenciesUpdates( dependencies, false ), "Dependencies" );
             }
+            if ( isProcessingPluginDependencies() )
+            {
+                logUpdates( getHelper().lookupDependenciesUpdates( pluginDependencies, false ), "Plugin Dependencies" );
+            }
         }
         catch ( InvalidVersionSpecificationException e )
         {