Add a ProjectBuilder that does not cache snapshots longer than the reactor build, fixes #9

src/main/java/org/apache/maven/project/SnapshotModelCache.java

@@ -0,0 +1,28 @@
+package org.apache.maven.project;
+
+import org.apache.maven.model.building.ModelCache;
+
+public class SnapshotModelCache implements ModelCache {
+
+    private final ModelCache globalCache;
+    private final ModelCache reactorCache;
+
+    public SnapshotModelCache(ModelCache globalCache) {
+        this.globalCache = globalCache;
+        this.reactorCache = new ReactorModelCache();
+    }
+
+    @Override
+    public void put(String groupId, String artifactId, String version, String tag, Object data) {
+        getDelegate(version).put(groupId, artifactId, version, tag, data);
+    }
+
+    @Override
+    public Object get(String groupId, String artifactId, String version, String tag) {
+        return getDelegate(version).get(groupId, artifactId, version, tag);
+    }
+
+    private ModelCache getDelegate(String version) {
+        return version.contains("SNAPSHOT") ? reactorCache : globalCache;
+    }
+}

src/main/resources/META-INF/plexus/components.xml

@@ -6,7 +6,6 @@
       <implementation>org.jboss.fuse.mvnd.plugin.CliPluginRealmCache</implementation>
       <isolated-realm>false</isolated-realm>
     </component>
-    <!--
     <component>
       <role>org.apache.maven.project.ProjectBuilder</role>
       <role-hint>default</role-hint>
@@ -48,6 +47,5 @@
         </requirement>
       </requirements>
     </component>
-    -->
   </components>
 </component-set>