diff --git a/core/src/main/java/hudson/model/AbstractBuild.java b/core/src/main/java/hudson/model/AbstractBuild.java
index debd48cdc93466a78ef78ca977caffef6488b8ba..425750b8d4b61a7be07bbeed8c0d37dbc5ae51e8 100644
--- a/core/src/main/java/hudson/model/AbstractBuild.java
+++ b/core/src/main/java/hudson/model/AbstractBuild.java
@@ -1,11 +1,10 @@
 package hudson.model;
 
+import hudson.Functions;
 import hudson.Launcher;
 import hudson.Proc.LocalProc;
 import hudson.Util;
-import hudson.Functions;
 import hudson.matrix.MatrixConfiguration;
-import hudson.matrix.MatrixRun;
 import hudson.maven.MavenBuild;
 import hudson.model.Fingerprint.BuildPtr;
 import hudson.model.Fingerprint.RangeSet;
@@ -23,9 +22,9 @@ import hudson.tasks.Publisher;
 import hudson.tasks.test.AbstractTestResultAction;
 import hudson.util.AdaptedIterator;
 import hudson.util.Iterators;
+import org.kohsuke.stapler.Stapler;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.StaplerResponse;
-import org.kohsuke.stapler.Stapler;
 import org.kohsuke.stapler.export.Exported;
 import org.xml.sax.SAXException;
 
@@ -45,8 +44,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
-import sun.misc.Request;
-
 /**
  * Base implementation of {@link Run}s that build software.
  *
@@ -185,6 +182,18 @@ public abstract class AbstractBuild<P extends AbstractProject<P,R>,R extends Abs
         };
     }
 
+    /**
+     * Returns true if this user has made a commit to this build.
+     *
+     * @since 1.191
+     */
+    public boolean hasParticipant(User user) {
+        for (ChangeLogSet.Entry e : getChangeSet())
+            if(e.getAuthor()==user)
+                return true;
+        return false;
+    }
+
     protected abstract class AbstractRunner implements Runner {
         /**
          * Since configuration can be changed while a build is in progress,
diff --git a/core/src/main/java/hudson/model/AbstractProject.java b/core/src/main/java/hudson/model/AbstractProject.java
index f3da860d2c6e011c2a254ec025a50fe5acc0248b..17f12aafc8195f97a0102875a27333b60a45380d 100644
--- a/core/src/main/java/hudson/model/AbstractProject.java
+++ b/core/src/main/java/hudson/model/AbstractProject.java
@@ -613,6 +613,18 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
         }
     }
 
+    /**
+     * Returns true if this user has made a commit to this project.
+     *
+     * @since 1.191
+     */
+    public boolean hasParticipant(User user) {
+        for( R build = getLastBuild(); build!=null; build=build.getPreviousBuild())
+            if(build.hasParticipant(user))
+                return true;
+        return false;
+    }
+
     public SCM getScm() {
         return scm;
     }