[FIXED JENKINS-18272]

Expose various key properties of POM as environment variables.

src/main/java/hudson/maven/MavenModule.java

@@ -323,6 +323,33 @@ public String getVersion() {
         return version;
     }
 
+    /**
+     * Packaging type of the module.
+     *
+     * pom, jar, maven-plugin, ejb, war, ear, rar, par or other custom types.
+     *
+     * @since 2.1
+     */
+    public String getPackaging() {
+        return packaging;
+    }
+
+    /**
+     * Short-cut for {@code getModuleName().groupId}
+     * @since 2.1
+     */
+    public String getGroupId() {
+        return getModuleName().groupId;
+    }
+
+    /**
+     * Short-cut for {@code getModuleName().artifactId}
+     * @since 2.1
+     */
+    public String getArtifactId() {
+        return getModuleName().artifactId;
+    }
+
     /**
      * Gets the list of goals to execute for this module.
      */

src/main/java/hudson/maven/MavenModuleSetBuild.java

@@ -183,7 +183,18 @@ public EnvVars getEnvironment(TaskListener log) throws IOException, InterruptedE
                 mvn.buildEnvVars(envs);
             }
         }
-
+
+        MavenModule root = getProject().getRootModule();
+        if (root!=null) {// I don't think it can ever be null but let's be defensive
+            // TODO: this needs to be documented but where?
+            envs.put("POM_DISPLAYNAME", root.getDisplayName());
+            envs.put("POM_VERSION", root.getVersion());
+            envs.put("POM_GROUPID", root.getGroupId());
+            envs.put("POM_ARTIFACTID", root.getArtifactId());
+            envs.put("POM_PACKAGING", root.getPackaging());
+            envs.put("POM_RELATIVEPATH", root.getRelativePath());
+        }
+
         return envs;
     }