diff --git a/core/src/main/java/hudson/Functions.java b/core/src/main/java/hudson/Functions.java
index 30ea3b973989a20685876c7bf973bdbf466bc403..8db131d770393dd502e99144d8d10ac8407ed58c 100644
--- a/core/src/main/java/hudson/Functions.java
+++ b/core/src/main/java/hudson/Functions.java
@@ -12,6 +12,7 @@ import hudson.model.Job;
 import hudson.model.JobPropertyDescriptor;
 import hudson.model.ModelObject;
 import hudson.model.Node;
+import hudson.model.ParameterDefinition;
 import hudson.model.Project;
 import hudson.model.Run;
 import hudson.model.TopLevelItem;
@@ -554,6 +555,10 @@ public class Functions {
         return RetentionStrategy.LIST;
     }
 
+    public static List<Descriptor<ParameterDefinition>> getParameterDescriptors() {
+        return ParameterDefinition.LIST;
+    }
+
     /**
      * Computes the path to the icon of the given action
      * from the context path.
diff --git a/core/src/main/java/hudson/Util.java b/core/src/main/java/hudson/Util.java
index b0bdbffce6f3eb569944eb27d333689e742b0049..ce1a6b35358a223b2a89d54d5cd0dc1762d75e90 100644
--- a/core/src/main/java/hudson/Util.java
+++ b/core/src/main/java/hudson/Util.java
@@ -5,6 +5,7 @@ import hudson.model.Hudson;
 import static hudson.model.Hudson.isWindows;
 import hudson.util.IOException2;
 import hudson.util.QuotedStringTokenizer;
+import hudson.util.VariableResolver;
 import hudson.Proc.LocalProc;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.Project;
@@ -99,6 +100,16 @@ public class Util {
      *
      */
     public static String replaceMacro(String s, Map<String,String> properties) {
+        return replaceMacro(s,new VariableResolver.ByMap<String>(properties));
+    }
+
+    /**
+     * Replaces the occurrence of '$key' by <tt>resolver.get('key')</tt>.
+     *
+     * <p>
+     * Unlike shell, undefined variables are left as-is (this behavior is the same as Ant.)
+     */
+    public static String replaceMacro(String s, VariableResolver<String> resolver) {
         int idx=0;
         while(true) {
             Matcher m = VARIABLE.matcher(s);
@@ -107,7 +118,7 @@ public class Util {
             String key = m.group().substring(1);
             if(key.charAt(0)=='{')  key = key.substring(1,key.length()-1);
 
-            String value = properties.get(key);
+            String value = resolver.resolve(key);
             if(value==null)
                 idx = m.start()+1; // skip this
             else {
diff --git a/core/src/main/java/hudson/WebAppMain.java b/core/src/main/java/hudson/WebAppMain.java
index a3b63b9365d78f7b323ef7581ce5a2d80326912c..e4c250bad50bc016c6705870f1abfb9bfb607d43 100644
--- a/core/src/main/java/hudson/WebAppMain.java
+++ b/core/src/main/java/hudson/WebAppMain.java
@@ -36,6 +36,7 @@ import java.net.URL;
 import java.net.URLClassLoader;
 import java.util.Locale;
 import java.util.Properties;
+import java.util.Timer;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -152,6 +153,8 @@ public class WebAppMain implements ServletContextListener {
                     try {
                         computeVersion(context);
 
+                        Trigger.timer = new Timer("Hudson cron thread");
+
                         try {
                             context.setAttribute(APP,new Hudson(home,context));
                         } catch( IOException e ) {
diff --git a/core/src/main/java/hudson/maven/EmbedderLoggerImpl.java b/core/src/main/java/hudson/maven/EmbedderLoggerImpl.java
index 1190e6394dae39e13bce7b504fdb6e94deff3c0d..8dc8a7da846ec0d4873f476e32b2edfaf7dc0e34 100644
--- a/core/src/main/java/hudson/maven/EmbedderLoggerImpl.java
+++ b/core/src/main/java/hudson/maven/EmbedderLoggerImpl.java
@@ -13,7 +13,7 @@ import java.util.StringTokenizer;
  * 
  * @author Kohsuke Kawaguchi
  */
-final class EmbedderLoggerImpl extends AbstractMavenEmbedderLogger {
+public final class EmbedderLoggerImpl extends AbstractMavenEmbedderLogger {
     private final PrintStream logger;
 
     public EmbedderLoggerImpl(TaskListener listener) {
diff --git a/core/src/main/java/hudson/maven/MavenModuleSetBuild.java b/core/src/main/java/hudson/maven/MavenModuleSetBuild.java
index 0dbc54d64c6e43fa50627caa1e2e0946083bb4db..c0a0478d224a9157ad81fd1a5e7828ef667d6504 100644
--- a/core/src/main/java/hudson/maven/MavenModuleSetBuild.java
+++ b/core/src/main/java/hudson/maven/MavenModuleSetBuild.java
@@ -17,6 +17,7 @@ import hudson.model.BuildListener;
 import hudson.model.Fingerprint;
 import hudson.model.Hudson;
 import hudson.model.Result;
+import hudson.model.ParametersAction;
 import hudson.remoting.Channel;
 import hudson.remoting.VirtualChannel;
 import hudson.util.ArgumentListBuilder;
@@ -289,8 +290,15 @@ public final class MavenModuleSetBuild extends AbstractBuild<MavenModuleSet,Mave
                 } else {
                     // do builds here
                     try {
+                        List<BuildWrapper> wrappers = new ArrayList<BuildWrapper>();
+                        for (BuildWrapper w : project.getBuildWrappers())
+                            wrappers.add(w);
+                        ParametersAction parameters = getAction(ParametersAction.class);
+                        if (parameters != null)
+                            parameters.createBuildWrappers(MavenModuleSetBuild.this,wrappers);
+
                         buildEnvironments = new ArrayList<BuildWrapper.Environment>();
-                        for( BuildWrapper w : project.getBuildWrappers()) {
+                        for( BuildWrapper w : wrappers) {
                             BuildWrapper.Environment e = w.setUp((AbstractBuild)MavenModuleSetBuild.this, launcher, listener);
                             if(e==null)
                                 return Result.FAILURE;
diff --git a/core/src/main/java/hudson/model/AbstractBuild.java b/core/src/main/java/hudson/model/AbstractBuild.java
index 5342afb5fec1c9e14c2add298aa29545f7015c7c..f92de552942afef0503ce7c2979e6d38755ff927 100644
--- a/core/src/main/java/hudson/model/AbstractBuild.java
+++ b/core/src/main/java/hudson/model/AbstractBuild.java
@@ -378,10 +378,14 @@ public abstract class AbstractBuild<P extends AbstractProject<P,R>,R extends Abs
             jdk.buildEnvVars(env);
         project.getScm().buildEnvVars(this,env);
 
-        if(buildEnvironments!=null) {
+        ParametersAction parameters = getAction(ParametersAction.class);
+        if (parameters != null)
+            parameters.buildEnvVars(this,env);
+
+        if(buildEnvironments!=null)
             for (BuildWrapper.Environment e : buildEnvironments)
                 e.buildEnvVars(env);
-        }
+        
         return env;
     }
 
diff --git a/core/src/main/java/hudson/model/AbstractProject.java b/core/src/main/java/hudson/model/AbstractProject.java
index 44abfb2a954853cdbff368f03574f2d9a50973c9..5d240c0ac3f7863fcefba116b3fb1be9024fae9c 100644
--- a/core/src/main/java/hudson/model/AbstractProject.java
+++ b/core/src/main/java/hudson/model/AbstractProject.java
@@ -367,7 +367,7 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
      */
     public boolean scheduleBuild() {
         if(isDisabled())    return false;
-        return Hudson.getInstance().getQueue().add(this);
+        return Hudson.getInstance().getQueue().add(this, getQuietPeriod());
     }
 
     /**
@@ -845,6 +845,10 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
     protected HistoryWidget createHistoryWidget() {
         return new BuildHistoryWidget<R>(this,getBuilds(),HISTORY_ADAPTER);
     }
+    
+    public boolean isParameterized() {
+    	return getProperty(ParametersDefinitionProperty.class) != null;
+    }
 
 //
 //
@@ -857,6 +861,13 @@ public abstract class AbstractProject<P extends AbstractProject<P,R>,R extends A
     public void doBuild( StaplerRequest req, StaplerResponse rsp ) throws IOException, ServletException {
         BuildAuthorizationToken.checkPermission(this, authToken, req, rsp);
 
+        // if a build is parameterized, let that take over
+        ParametersDefinitionProperty pp = getProperty(ParametersDefinitionProperty.class);
+        if (pp != null) {
+            pp._doBuild(req,rsp);
+            return;
+        }
+
         String delay = req.getParameter("delay");
         if (delay!=null) {
             if (!isDisabled()) {
diff --git a/core/src/main/java/hudson/model/Build.java b/core/src/main/java/hudson/model/Build.java
index 5fb180c7905ff16ae9bb236eb03193b95af0dc9f..65e00b452fcede81658c617a4f313e4082c7a2f3 100644
--- a/core/src/main/java/hudson/model/Build.java
+++ b/core/src/main/java/hudson/model/Build.java
@@ -12,7 +12,6 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.List;
-import java.util.Map;
 import java.util.Collection;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.logging.Logger;
@@ -94,14 +93,19 @@ public abstract class Build <P extends Project<P,B>,B extends Build<P,B>>
 
             buildEnvironments = new ArrayList<Environment>();
             try {
-                for( BuildWrapper w : project.getBuildWrappers().values() ) {
+                List<BuildWrapper> wrappers = new ArrayList<BuildWrapper>(project.getBuildWrappers().values());
+
+                ParametersAction parameters = getAction(ParametersAction.class);
+                if (parameters != null)
+                    parameters.createBuildWrappers(Build.this,wrappers);
+
+                for( BuildWrapper w : wrappers ) {
                     Environment e = w.setUp((AbstractBuild)Build.this, launcher, listener);
                     if(e==null)
                         return Result.FAILURE;
                     buildEnvironments.add(e);
                 }
 
-
                 if(!build(listener,project.getBuilders()))
                     return Result.FAILURE;
             } finally {
diff --git a/core/src/main/java/hudson/model/Executor.java b/core/src/main/java/hudson/model/Executor.java
index 2577e1927a17ac322551d5c9ef08d215b788ff4c..80c410a4c642fca34638929b62e6fde92910fefe 100644
--- a/core/src/main/java/hudson/model/Executor.java
+++ b/core/src/main/java/hudson/model/Executor.java
@@ -56,7 +56,7 @@ public class Executor extends Thread implements ModelObject {
         try {
             finishTime = System.currentTimeMillis();
             while(true) {
-                if(Hudson.getInstance().isTerminating())
+                if(Hudson.getInstance() == null || Hudson.getInstance().isTerminating())
                     return;
 
                 synchronized(owner) {
diff --git a/core/src/main/java/hudson/model/Hudson.java b/core/src/main/java/hudson/model/Hudson.java
index adccb05a8dce3266249af5419a388fa59f25894e..034008f97bc40b5c826f60438e1d3b0a1a0e8ddd 100644
--- a/core/src/main/java/hudson/model/Hudson.java
+++ b/core/src/main/java/hudson/model/Hudson.java
@@ -76,6 +76,7 @@ import org.acegisecurity.context.SecurityContextHolder;
 import org.acegisecurity.providers.anonymous.AnonymousAuthenticationToken;
 import org.acegisecurity.ui.AbstractProcessingFilter;
 import static org.acegisecurity.ui.rememberme.TokenBasedRememberMeServices.ACEGI_SECURITY_HASHED_REMEMBER_ME_COOKIE_KEY;
+import org.apache.commons.logging.LogFactory;
 import org.kohsuke.stapler.MetaClass;
 import org.kohsuke.stapler.QueryParameter;
 import org.kohsuke.stapler.Stapler;
@@ -1424,6 +1425,7 @@ public final class Hudson extends View implements ItemGroup<TopLevelItem>, Node,
         }
         ExternalJob.reloadThread.interrupt();
         Trigger.timer.cancel();
+        Trigger.timer = null;
         if(tcpSlaveAgentListener!=null)
             tcpSlaveAgentListener.shutdown();
 
@@ -1436,6 +1438,8 @@ public final class Hudson extends View implements ItemGroup<TopLevelItem>, Node,
             getQueue().save();
 
         threadPoolForLoad.shutdown();
+        
+        LogFactory.releaseAll();
     }
 
     public Object getDynamic(String token, StaplerRequest req, StaplerResponse rsp) {
diff --git a/core/src/main/java/hudson/model/JobParameterDefinition.java b/core/src/main/java/hudson/model/JobParameterDefinition.java
new file mode 100644
index 0000000000000000000000000000000000000000..42dea3c2abaae0b92e8fc794c036920fa4961a4b
--- /dev/null
+++ b/core/src/main/java/hudson/model/JobParameterDefinition.java
@@ -0,0 +1,45 @@
+package hudson.model;
+
+import net.sf.json.JSONObject;
+
+import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.StaplerRequest;
+
+public class JobParameterDefinition extends ParameterDefinition {
+
+    @DataBoundConstructor
+    public JobParameterDefinition(String name) {
+        super(name);
+    }
+
+    @Override
+    public ParameterDescriptor getDescriptor() {
+        return DESCRIPTOR;
+    }
+
+    public static final ParameterDescriptor DESCRIPTOR = new DescriptorImpl();
+
+    public static class DescriptorImpl extends ParameterDescriptor {
+
+        protected DescriptorImpl() {
+            super(JobParameterDefinition.class);
+        }
+
+        @Override
+        public String getDisplayName() {
+            return "Project Parameter";
+        }
+
+        @Override
+        public ParameterDefinition newInstance(StaplerRequest req, JSONObject formData) throws FormException {
+            return req.bindJSON(JobParameterDefinition.class, formData);
+        }
+
+    }
+
+    @Override
+    public ParameterValue createValue(StaplerRequest req, JSONObject jo) {
+        return req.bindJSON(JobParameterValue.class, jo);
+    }
+
+}
diff --git a/core/src/main/java/hudson/model/JobParameterValue.java b/core/src/main/java/hudson/model/JobParameterValue.java
new file mode 100644
index 0000000000000000000000000000000000000000..32e3b09e69710c7feef7d23899da28aad1a8a754
--- /dev/null
+++ b/core/src/main/java/hudson/model/JobParameterValue.java
@@ -0,0 +1,24 @@
+package hudson.model;
+
+import org.kohsuke.stapler.DataBoundConstructor;
+
+import java.util.Map;
+
+public class JobParameterValue extends ParameterValue {
+    public final Job job;
+
+    @DataBoundConstructor
+    public JobParameterValue(String name, Job job) {
+        super(name);
+        this.job = job;
+    }
+
+    /**
+     * Exposes the name/value as an environment variable.
+     */
+    @Override
+    public void buildEnvVars(AbstractBuild<?,?> build, Map<String,String> env) {
+        // TODO: check with Tom if this is really what he had in mind
+        env.put(name.toUpperCase(),job.toString());
+    }
+}
diff --git a/core/src/main/java/hudson/model/JobProperty.java b/core/src/main/java/hudson/model/JobProperty.java
index ac85bb2e13523d133ebaee8ddf984257cb1ee4cb..378712b06af96cee54e4e8f5c678059726d05b08 100644
--- a/core/src/main/java/hudson/model/JobProperty.java
+++ b/core/src/main/java/hudson/model/JobProperty.java
@@ -61,6 +61,10 @@ public abstract class JobProperty<J extends Job<?,?>> implements Describable<Job
     /**
      * {@link Action} to be displayed in the job page.
      *
+     * <p>
+     * Returning non-null from this method allows a job property to add an item
+     * to the left navigation bar in the job page.
+     *
      * @param job
      *      Always the same as {@link #owner} but passed in anyway for backward compatibility (I guess.)
      *      You really need not use this value at all.
diff --git a/core/src/main/java/hudson/model/Jobs.java b/core/src/main/java/hudson/model/Jobs.java
index 9d52a37b72dd8ee6bd0fc83d81c85823a48d7712..c43b299a3fedbcc1cd2ec34add4836d344607a9f 100644
--- a/core/src/main/java/hudson/model/Jobs.java
+++ b/core/src/main/java/hudson/model/Jobs.java
@@ -17,5 +17,6 @@ public class Jobs {
      * @see JobPropertyDescriptor#getPropertyDescriptors(Class)
      */
     public static final List<JobPropertyDescriptor> PROPERTIES = Descriptor.toList(
+    		ParametersDefinitionProperty.DESCRIPTOR
     );
 }
diff --git a/core/src/main/java/hudson/model/ParameterDefinition.java b/core/src/main/java/hudson/model/ParameterDefinition.java
new file mode 100644
index 0000000000000000000000000000000000000000..84c1bbf4f16b66010b5904f44aad100b3a5eff0d
--- /dev/null
+++ b/core/src/main/java/hudson/model/ParameterDefinition.java
@@ -0,0 +1,108 @@
+package hudson.model;
+
+import net.sf.json.JSONObject;
+
+import org.kohsuke.stapler.StaplerRequest;
+
+import hudson.util.DescriptorList;
+import hudson.ExtensionPoint;
+
+/**
+ * Defines a parameter for a build.
+ *
+ * <p>
+ * In Hudson, a user can configure a job to require parameters for a build.
+ * For example, imagine a test job that takes the bits to be tested as a parameter.
+ *
+ * <p>
+ * The actual meaning and the purpose of parameters are entirely up to users, so
+ * what the concrete parameter implmentation is pluggable. Write subclasses
+ * in a plugin and hook it up to {@link #LIST} to register it.
+ *
+ * <p>
+ * Three classes are used to model build parameters. First is the
+ * {@link ParameterDescriptor}, which tells Hudson what kind of implementations are
+ * available. From {@link ParameterDescriptor#newInstance(StaplerRequest, JSONObject)},
+ * Hudson creates {@link ParameterDefinition}s based on the job configuration.
+ * For example, if the user defines two string parameters "database-type" and
+ * "appserver-type", we'll get two {@link StringParameterDefinition} instances
+ * with their respective names.
+ *
+ * <p>
+ * When a job is configured with {@link ParameterDefinition} (or more precisely,
+ * {@link ParametersDefinitionProperty}, which in turns retains {@link ParameterDefinition}s),
+ * user would have to enter the values for the defined build parameters.
+ * The {@link #createValue(StaplerRequest, JSONObject)} method is used to convert this
+ * form submission into {@link ParameterValue} objects, which are then accessible
+ * during a build.
+ *
+ *
+ *
+ * <h2>Persistence</h2>
+ * <p>
+ * Instances of {@link ParameterDefinition}s are persisted into job <tt>config.xml</tt>
+ * through XStream.
+ *
+ *
+ * <h2>Assocaited Views</h2>
+ * <h4>config.jelly</h4>
+ * <p>
+ * {@link ParameterDefinition} class uses <tt>config.jelly</tt> to provide contribute a form
+ * fragment in the job configuration screen. Values entered there is fed back to
+ * {@link ParameterDescriptor#newInstance(StaplerRequest, JSONObject)} to create {@link ParameterDefinition}s.
+ *
+ * <h4>index.jelly</h4>
+ * The <tt>index.jelly</tt> view contributes a form fragment in the page where the user
+ * enters actual values of parameters for a build. The result of this form submission
+ * is then fed to {@link ParameterDefinition#createValue(StaplerRequest, JSONObject)} to
+ * create {@link ParameterValue}s.
+ *
+ * TODO: what Jelly pages does this object need for rendering UI?
+ * TODO: {@link ParameterValue} needs to have some mechanism to expose values to the build
+ * @see StringParameterDefinition
+ */
+public abstract class ParameterDefinition implements
+        Describable<ParameterDefinition>, ExtensionPoint {
+
+    private final String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public ParameterDefinition(String name) {
+        super();
+        this.name = name;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public abstract ParameterDescriptor getDescriptor();
+
+    public abstract ParameterValue createValue(StaplerRequest req, JSONObject jo);
+
+    /**
+     * A list of available parameter definition types
+     */
+    public static final DescriptorList<ParameterDefinition> LIST = new DescriptorList<ParameterDefinition>();
+
+    public abstract static class ParameterDescriptor extends
+            Descriptor<ParameterDefinition> {
+
+        protected ParameterDescriptor(Class<? extends ParameterDefinition> klazz) {
+            super(klazz);
+        }
+
+        public String getValuePage() {
+            return getViewPage(clazz, "index.jelly");
+        }
+
+        @Override
+        public String getDisplayName() {
+            return "Parameter";
+        }
+
+    }
+
+}
diff --git a/core/src/main/java/hudson/model/ParameterValue.java b/core/src/main/java/hudson/model/ParameterValue.java
new file mode 100644
index 0000000000000000000000000000000000000000..a87c76e47abdef407fd87a48a2a9ec1ee8f967fc
--- /dev/null
+++ b/core/src/main/java/hudson/model/ParameterValue.java
@@ -0,0 +1,116 @@
+package hudson.model;
+
+import hudson.tasks.BuildWrapper;
+import hudson.tasks.Builder;
+import hudson.util.VariableResolver;
+
+import java.util.Map;
+
+import org.kohsuke.stapler.StaplerRequest;
+import net.sf.json.JSONObject;
+
+/**
+ * A value for a parameter in a build.
+ *
+ * Created by {@link ParameterDefinition#createValue(StaplerRequest, JSONObject)} for
+ * a particular build (although this 'owner' build object is passed in for every method
+ * call as a parameter so that the parameter won't have to persist it.)
+ *
+ * <h2>Persistence</h2>
+ * <p>
+ * Instances of {@link ParameterValue}s are persisted into build's <tt>build.xml</tt>
+ * through XStream (via {@link ParametersAction}), so instances need to be persistable.
+ *
+ * <h2>Assocaited Views</h2>
+ * <h4>value.jelly</h4>
+ * The <tt>value.jelly</tt> view contributes a UI fragment to display the parameter
+ * values used for a build.
+ *
+ * <h2>Notes</h2>
+ * <ol>
+ * <li>{@link ParameterValue} is used to record values of the past build, but
+ *     {@link ParameterDefinition} used back then might be gone already, or represent
+ *     a different parameter now. So don't try to use the name to infer
+ *     {@link ParameterDefinition} is.
+ * </ol>
+ * @see ParameterDefinition
+ */
+public abstract class ParameterValue {
+    protected final String name;
+
+    protected ParameterValue(String name) {
+        this.name = name;
+    }
+
+    /**
+     * Name of the parameter.
+     *
+     * This uniquely distinguishes {@link ParameterValue} among other parameters
+     * for the same build. This must be the same as {@link ParameterDefinition#getName()}.
+     */
+    public final String getName() {
+        return name;
+    }
+
+    /**
+     * Adds environmental variables for the builds to the given map.
+     *
+     * <p>
+     * This provides a means for a parameter to pass the parameter
+     * values to the build to be performed.
+     *
+     * <p>
+     * When this method is invoked, the map already contains the
+     * current "planned export" list. The implementation is
+     * expected to add more values to this map (or do nothing)
+     *
+     * <p>
+     * Environment variables should be by convention all upper case.
+     * (This is so that a Windows/Unix heterogenous environment
+     * won't get inconsistent result depending on which platform to
+     * execute.)
+     *
+     * @param env
+     *      never null.
+     * @param build
+     *      The build for which this parameter is being used. Never null.
+     */
+    public void buildEnvVars(AbstractBuild<?,?> build, Map<String,String> env) {
+        // no-op by default
+    }
+
+    /**
+     * Called at the beginning of a build to let a {@link ParameterValue}
+     * contributes a {@link BuildWrapper} to the build.
+     *
+     * <p>
+     * This provides a means for a parameter to perform more extensive
+     * set up / tear down during a build.
+     *
+     * @param build
+     *      The build for which this parameter is being used. Never null.
+     * @return
+     *      null if the parameter has no {@link BuildWrapper} to contribute to.
+     */
+    public BuildWrapper createBuildWrapper(AbstractBuild<?,?> build) {
+        return null;
+    }
+
+    /**
+     * Returns a {@link VariableResolver} so that other components like {@link Builder}s
+     * can perform variable substitution to reflect parameter values into the build process.
+     *
+     * <p.
+     * This is yet another means in which a {@link ParameterValue} can influence
+     * a build.
+     *
+     * @param build
+     *      The build for which this parameter is being used. Never null.
+     * @return
+     *      if the parameter value is not interested in participating to the
+     *      variable replacement process, return {@link VariableResolver#NONE}.
+     */
+    public VariableResolver<String> createVariableResolver(AbstractBuild<?,?> build) {
+        return VariableResolver.NONE;
+    }
+}
diff --git a/core/src/main/java/hudson/model/ParameterizedProjectTask.java b/core/src/main/java/hudson/model/ParameterizedProjectTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..a9c2bd504bf9f3859d8c06068fa2c541b2e02442
--- /dev/null
+++ b/core/src/main/java/hudson/model/ParameterizedProjectTask.java
@@ -0,0 +1,63 @@
+package hudson.model;
+
+import hudson.model.Queue.Executable;
+import hudson.util.QueueTaskFilter;
+
+import java.io.IOException;
+import java.util.List;
+
+/**
+ * A task representing a project that should be built with a certain set of
+ * parameter values
+ */
+public class ParameterizedProjectTask extends QueueTaskFilter {
+
+    private final AbstractProject<?, ?> project;
+    private final List<ParameterValue> parameters;
+
+    public ParameterizedProjectTask(AbstractProject<?, ?> project,
+                                    List<ParameterValue> parameters) {
+        super(project);
+        this.project = project;
+        this.parameters = parameters;
+    }
+
+    @Override
+    public Executable createExecutable() throws IOException {
+        AbstractBuild<?, ?> build = project.createExecutable();
+        build.addAction(new ParametersAction(parameters, build));
+
+        return build;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result
+                + ((parameters == null) ? 0 : parameters.hashCode());
+        result = prime * result + ((project == null) ? 0 : project.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        ParameterizedProjectTask other = (ParameterizedProjectTask) obj;
+        if (parameters == null) {
+            if (other.parameters != null)
+                return false;
+        } else if (!parameters.equals(other.parameters)) {
+            return false;
+        }
+        if (project != other.project) {
+            return false;
+        }
+        return true;
+    }
+}
diff --git a/core/src/main/java/hudson/model/ParametersAction.java b/core/src/main/java/hudson/model/ParametersAction.java
new file mode 100644
index 0000000000000000000000000000000000000000..6600e6e0c3034e76cd8a24b2d41db0629751f540
--- /dev/null
+++ b/core/src/main/java/hudson/model/ParametersAction.java
@@ -0,0 +1,86 @@
+package hudson.model;
+
+import hudson.Util;
+import hudson.tasks.BuildWrapper;
+import hudson.util.VariableResolver;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Records the parameter values used for a build.
+ *
+ * <P>
+ * This object is associated with the build record so that we remember what parameters
+ * were used for what build.
+ */
+public class ParametersAction implements Action, Iterable<ParameterValue> {
+
+    private final List<ParameterValue> parameters;
+    private final AbstractBuild<?, ?> build;
+
+    public ParametersAction(List<ParameterValue> parameters, AbstractBuild<?, ?> build) {
+        this.parameters = parameters;
+        this.build = build;
+    }
+
+    public void createBuildWrappers(AbstractBuild<?,?> build, Collection<? super BuildWrapper> result) {
+        for (ParameterValue p : parameters) {
+            BuildWrapper w = p.createBuildWrapper(build);
+            if(w!=null) result.add(w);
+        }
+    }
+
+    public void buildEnvVars(AbstractBuild<?,?> build, Map<String,String> env) {
+        for (ParameterValue p : parameters)
+            p.buildEnvVars(build,env);
+    }
+
+    /**
+     * Performs a variable subsitution to the given text and return it.
+     */
+    public String substitute(AbstractBuild<?,?> build, String text) {
+        return Util.replaceMacro(text,createVariableResolver(build));
+    }
+
+    /**
+     * Creates an {@link VariableResolver} that aggregates all the parameters.
+     */
+    public VariableResolver<String> createVariableResolver(AbstractBuild<?,?> build) {
+        VariableResolver[] resolvers = new VariableResolver[parameters.size()];
+        int i=0;
+        for (ParameterValue p : parameters)
+            resolvers[i++] = p.createVariableResolver(build);
+
+        return new VariableResolver.Union<String>(resolvers);
+    }
+
+    public AbstractBuild<?, ?> getBuild() {
+        return build;
+    }
+
+    public Iterator<ParameterValue> iterator() {
+        return parameters.iterator();
+    }
+
+    public List<ParameterValue> getParameters() {
+        return parameters;
+    }
+
+    @Override
+    public String getDisplayName() {
+        return "Parameters";
+    }
+
+    @Override
+    public String getIconFileName() {
+        return "document-properties.gif";
+    }
+
+    @Override
+    public String getUrlName() {
+        return "parameters";
+    }
+}
diff --git a/core/src/main/java/hudson/model/ParametersDefinitionProperty.java b/core/src/main/java/hudson/model/ParametersDefinitionProperty.java
new file mode 100644
index 0000000000000000000000000000000000000000..e685f5505d497abb7ea4743edb6af59b881a8e61
--- /dev/null
+++ b/core/src/main/java/hudson/model/ParametersDefinitionProperty.java
@@ -0,0 +1,154 @@
+package hudson.model;
+
+import hudson.StructuredForm;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import net.sf.json.JSONArray;
+import net.sf.json.JSONObject;
+
+import org.kohsuke.stapler.StaplerRequest;
+import org.kohsuke.stapler.StaplerResponse;
+
+import javax.servlet.ServletException;
+
+/**
+ * Keeps a list of the parameters defined for a project.
+ *
+ * <p>
+ * This class also implements {@link Action} so that <tt>index.jelly</tt> provides
+ * a form to enter build parameters. 
+ */
+public class ParametersDefinitionProperty extends JobProperty<AbstractProject<?, ?>>
+        implements Action {
+
+    private final List<ParameterDefinition> parameterDefinitions;
+
+    public ParametersDefinitionProperty(List<ParameterDefinition> parameterDefinitions) {
+        this.parameterDefinitions = parameterDefinitions;
+    }
+
+    public AbstractProject<?,?> getOwner() {
+        return owner;
+    }
+
+    public List<ParameterDefinition> getParameterDefinitions() {
+        return parameterDefinitions;
+    }
+
+    @Override
+    public Action getJobAction(AbstractProject<?, ?> job) {
+        return this;
+    }
+
+    public AbstractProject<?, ?> getProject() {
+        return (AbstractProject<?, ?>) owner;
+    }
+
+    /**
+     * Interprets the form submission and schedules a build for a parameterized job.
+     *
+     * <p>
+     * This method is supposed to be invoked from {@link AbstractProject#doBuild(StaplerRequest, StaplerResponse)}.
+     */
+    public void _doBuild(StaplerRequest req, StaplerResponse rsp) throws IOException, ServletException {
+        if(!req.getMethod().equals("POST")) {
+            // show the parameter entry form.
+            req.getView(this,"index.jelly").forward(req,rsp);
+            return;
+        }
+
+        List<ParameterValue> values = new ArrayList<ParameterValue>();
+
+        JSONObject formData = StructuredForm.get(req);
+        JSONArray a = JSONArray.fromObject(formData.get("parameter"));
+
+        for (Object o : a) {
+            JSONObject jo = (JSONObject) o;
+            String name = jo.getString("name");
+
+            ParameterDefinition d = getParameterDefinition(name);
+            if(d==null)
+                throw new IllegalArgumentException("No such parameter definition: " + name);
+            values.add(d.createValue(req, jo));
+        }
+
+        Hudson.getInstance().getQueue().add(
+                new ParameterizedProjectTask(owner, values), 0);
+
+        // send the user back to the job top page.
+        rsp.sendRedirect(".");
+    }
+
+    /**
+     * Gets the {@link ParameterDefinition} of the given name, if any.
+     */
+    public ParameterDefinition getParameterDefinition(String name) {
+        for (ParameterDefinition pd : parameterDefinitions)
+            if (pd.getName().equals(name))
+                return pd;
+        return null;
+    }
+
+    @Override
+    public JobPropertyDescriptor getDescriptor() {
+        return DESCRIPTOR;
+    }
+
+    public static final JobPropertyDescriptor DESCRIPTOR = new DescriptorImpl();
+
+    public static class DescriptorImpl extends JobPropertyDescriptor {
+
+        protected DescriptorImpl() {
+            super(ParametersDefinitionProperty.class);
+        }
+
+        @Override
+        public boolean isApplicable(Class<? extends Job> jobType) {
+            return AbstractProject.class.isAssignableFrom(jobType);
+        }
+
+        @Override
+        public JobProperty<?> newInstance(StaplerRequest req,
+                                          JSONObject formData) throws FormException {
+            if (formData.isNullObject()) {
+                return null;
+            }
+
+            List<ParameterDefinition> parameterDefinitions = Descriptor.newInstancesFromHeteroList(
+                    req, formData, "parameter", ParameterDefinition.LIST);
+            if(parameterDefinitions.isEmpty())
+                return null;
+
+            return new ParametersDefinitionProperty(parameterDefinitions);
+        }
+
+        @Override
+        public String getDisplayName() {
+            return "Parameters";
+        }
+
+    }
+
+    @Override
+    public String getDisplayName() {
+        return null;
+    }
+
+    @Override
+    public String getIconFileName() {
+        return null;
+    }
+
+    @Override
+    public String getUrlName() {
+        return "parameters";
+    }
+
+
+    static {
+        ParameterDefinition.LIST.add(StringParameterDefinition.DESCRIPTOR);
+    }
+}
diff --git a/core/src/main/java/hudson/model/Queue.java b/core/src/main/java/hudson/model/Queue.java
index f7e90c2b0cbdde9569e2388f80ad726dcaeb01d4..0b52d2c9a1c03e6cfdd50b33b86d06a7faf9601b 100644
--- a/core/src/main/java/hudson/model/Queue.java
+++ b/core/src/main/java/hudson/model/Queue.java
@@ -1,28 +1,42 @@
 package hudson.model;
 
 import hudson.Util;
+import hudson.XmlFile;
 import hudson.model.Node.Mode;
 import hudson.triggers.SafeTimerTask;
 import hudson.triggers.Trigger;
 import hudson.util.OneShotEvent;
-import org.acegisecurity.AccessDeniedException;
-import org.kohsuke.stapler.export.Exported;
-import org.kohsuke.stapler.export.ExportedBean;
+import hudson.util.XStream2;
 
-import javax.management.timer.Timer;
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
-import java.io.PrintWriter;
 import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeSet;
 import java.util.Map.Entry;
-import java.util.*;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import javax.management.timer.Timer;
+
+import org.acegisecurity.AccessDeniedException;
+import org.kohsuke.stapler.export.Exported;
+import org.kohsuke.stapler.export.ExportedBean;
+
+import com.thoughtworks.xstream.XStream;
+import com.thoughtworks.xstream.converters.basic.AbstractSingleValueConverter;
+
 /**
  * Build queue.
  *
@@ -130,7 +144,52 @@ public class Queue extends ResourceController {
      */
     private final Map<Executor, JobOffer> parked = new HashMap<Executor, JobOffer>();
 
+    private final XStream xstream = new XStream2();
+    
     public Queue() {
+        xstream.registerConverter(new AbstractSingleValueConverter() {
+
+			@Override
+			@SuppressWarnings("unchecked")
+			public boolean canConvert(Class klazz) {
+				return TopLevelItem.class.isAssignableFrom(klazz);
+			}
+
+			@Override
+			public Object fromString(String string) {
+				return Hudson.getInstance().getItem(string);
+			}
+
+			@Override
+			public String toString(Object item) {
+				return ((TopLevelItem) item).getName();
+			}
+        });
+        xstream.registerConverter(new AbstractSingleValueConverter() {
+
+			@SuppressWarnings("unchecked")
+			@Override
+			public boolean canConvert(Class klazz) {
+				return Run.class.isAssignableFrom(klazz);
+			}
+
+			@Override
+			public Object fromString(String string) {
+				String[] split = string.split("#");
+				String projectName = split[0];
+				int buildNumber = Integer.parseInt(split[1]);
+				Job<?,?> job = (Job<?,?>) Hudson.getInstance().getItem(projectName);
+				Run<?,?> run = job.getBuildByNumber(buildNumber);
+				return run;
+			}
+
+			@Override
+			public String toString(Object object) {
+				Run<?,?> run = (Run<?,?>) object;
+				return run.getParent().getName() + "#" + run.getNumber();
+			}
+        });
+ 
         // if all the executors are busy doing something, then the queue won't be maintained in
         // timely fashion, so use another thread to make sure it happens.
         new MaintainTask(this);
@@ -140,22 +199,32 @@ public class Queue extends ResourceController {
      * Loads the queue contents that was {@link #save() saved}.
      */
     public synchronized void load() {
-        // write out the contents of the queue
         try {
+        	// first try the old format
             File queueFile = getQueueFile();
-            if (!queueFile.exists())
-                return;
-
-            BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(queueFile)));
-            String line;
-            while ((line = in.readLine()) != null) {
-                AbstractProject j = Hudson.getInstance().getItemByFullName(line, AbstractProject.class);
-                if (j != null)
-                    j.scheduleBuild();
-            }
-            in.close();
-            // discard the queue file now that we are done
-            queueFile.delete();
+            if (queueFile.exists()) {
+                BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(queueFile)));
+	            String line;
+	            while ((line = in.readLine()) != null) {
+	                AbstractProject j = Hudson.getInstance().getItemByFullName(line, AbstractProject.class);
+	                if (j != null)
+	                    j.scheduleBuild();
+	            }
+	            in.close();
+	            // discard the queue file now that we are done
+	            queueFile.delete();
+	            
+	            return;
+	        } else {
+	        	queueFile = getXMLQueueFile();
+	        	if (queueFile.exists()) {
+	        		List<Task> tasks = (List<Task>) new XmlFile(xstream, queueFile).read();
+	        		for (Task task: tasks) {
+	        			add(task, 0);
+	        		}
+	        		queueFile.delete();
+	        	}
+	        }
         } catch (IOException e) {
             LOGGER.log(Level.WARNING, "Failed to load the queue file " + getQueueFile(), e);
         }
@@ -165,21 +234,26 @@ public class Queue extends ResourceController {
      * Persists the queue contents to the disk.
      */
     public synchronized void save() {
-        // write out the contents of the queue
+        // write out the tasks on the queue
+    	ArrayList<Task> tasks = new ArrayList<Task>();
+    	for (Item item: getItems()) {
+    		tasks.add(item.task);
+    	}
+    	
         try {
-            PrintWriter w = new PrintWriter(new FileOutputStream(
-                    getQueueFile()));
-            for (Item i : getItems())
-                w.println(i.task.getName());
-            w.close();
+        	new XmlFile(xstream, getXMLQueueFile()).write(tasks);
         } catch (IOException e) {
             LOGGER.log(Level.WARNING, "Failed to write out the queue file " + getQueueFile(), e);
         }
     }
 
     private File getQueueFile() {
-        return new File(Hudson.getInstance().getRootDir(), "queue.txt");
-    }
+	    return new File(Hudson.getInstance().getRootDir(), "queue.txt");
+	}
+
+    private File getXMLQueueFile() {
+	    return new File(Hudson.getInstance().getRootDir(), "queue.xml");
+	}
 
     /**
      * Schedule a new build for this project.
@@ -245,10 +319,10 @@ public class Queue extends ResourceController {
      * @return true if the project was indeed in the queue and was removed.
      *         false if this was no-op.
      */
-    public synchronized boolean cancel(AbstractProject<?, ?> p) {
+    public synchronized boolean cancel(Task p) {
         LOGGER.fine("Cancelling " + p.getName());
-        for (Iterator itr = waitingList.iterator(); itr.hasNext();) {
-            Item item = (Item) itr.next();
+        for (Iterator<WaitingItem> itr = waitingList.iterator(); itr.hasNext();) {
+            Item item = itr.next();
             if (item.task == p) {
                 itr.remove();
                 return true;
@@ -319,10 +393,10 @@ public class Queue extends ResourceController {
      * Left for backward compatibility.
      *
      * @see #getItem(Task)
-     */
     public synchronized Item getItem(AbstractProject p) {
         return getItem((Task) p);
     }
+     */
 
     /**
      * Returns true if this queue contains the said project.
diff --git a/core/src/main/java/hudson/model/Run.java b/core/src/main/java/hudson/model/Run.java
index 733f2039cd536c721f7d55a2e0810d1b87971a65..8bbe17d986f52c511a2d232467160ac7fd9a6168 100644
--- a/core/src/main/java/hudson/model/Run.java
+++ b/core/src/main/java/hudson/model/Run.java
@@ -781,6 +781,8 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
 
                     listener.started();
 
+                    RunListener.fireStarted(this,listener);
+
                     setResult(job.run(listener));
 
                     LOGGER.info(toString()+" main build action completed: "+result);
diff --git a/core/src/main/java/hudson/model/RunMap.java b/core/src/main/java/hudson/model/RunMap.java
index 86885a92479320ef4fde8dd8d0748af12b7ee4ca..faeb2b08b291ff2adda64aaa81f2d9e1a568db0a 100644
--- a/core/src/main/java/hudson/model/RunMap.java
+++ b/core/src/main/java/hudson/model/RunMap.java
@@ -175,6 +175,8 @@ public final class RunMap<R extends Run<?,R>> extends AbstractMap<Integer,R> imp
                     builds.put( b.getNumber(), b );
                 } catch (IOException e) {
                     e.printStackTrace();
+                } catch (InstantiationError e) {
+                    e.printStackTrace();
                 }
             }
         }
diff --git a/core/src/main/java/hudson/model/RunParameterDefinition.java b/core/src/main/java/hudson/model/RunParameterDefinition.java
new file mode 100644
index 0000000000000000000000000000000000000000..fcd1ce702331d246e99a1a6d9a8ae184a7d89a1b
--- /dev/null
+++ b/core/src/main/java/hudson/model/RunParameterDefinition.java
@@ -0,0 +1,45 @@
+package hudson.model;
+
+import net.sf.json.JSONObject;
+
+import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.StaplerRequest;
+
+public class RunParameterDefinition extends ParameterDefinition {
+
+    @DataBoundConstructor
+    public RunParameterDefinition(String name) {
+        super(name);
+    }
+
+    @Override
+    public ParameterDescriptor getDescriptor() {
+        return DESCRIPTOR;
+    }
+
+    public static final ParameterDescriptor DESCRIPTOR = new DescriptorImpl();
+
+    public static class DescriptorImpl extends ParameterDescriptor {
+
+        protected DescriptorImpl() {
+            super(RunParameterDefinition.class);
+        }
+
+        @Override
+        public String getDisplayName() {
+            return "Run Parameter";
+        }
+
+        @Override
+        public ParameterDefinition newInstance(StaplerRequest req, JSONObject formData) throws FormException {
+            return req.bindJSON(RunParameterDefinition.class, formData);
+        }
+
+    }
+
+    @Override
+    public ParameterValue createValue(StaplerRequest req, JSONObject jo) {
+        return req.bindJSON(RunParameterValue.class, jo);
+    }
+
+}
diff --git a/core/src/main/java/hudson/model/RunParameterValue.java b/core/src/main/java/hudson/model/RunParameterValue.java
new file mode 100644
index 0000000000000000000000000000000000000000..d278e8da63875a41c45ec3f383d2085d3ec22097
--- /dev/null
+++ b/core/src/main/java/hudson/model/RunParameterValue.java
@@ -0,0 +1,25 @@
+package hudson.model;
+
+import org.kohsuke.stapler.DataBoundConstructor;
+
+import java.util.Map;
+
+public class RunParameterValue extends ParameterValue {
+
+    public final Run run;
+
+    @DataBoundConstructor
+    public RunParameterValue(String name, Run run) {
+        super(name);
+        this.run = run;
+    }
+
+    /**
+     * Exposes the name/value as an environment variable.
+     */
+    @Override
+    public void buildEnvVars(AbstractBuild<?,?> build, Map<String,String> env) {
+        // TODO: check with Tom if this is really what he had in mind
+        env.put(name.toUpperCase(),run.toString());
+    }
+}
diff --git a/core/src/main/java/hudson/model/StringParameterDefinition.java b/core/src/main/java/hudson/model/StringParameterDefinition.java
new file mode 100644
index 0000000000000000000000000000000000000000..8738495440b3c6cd4435bceb3168dc66a505ccf9
--- /dev/null
+++ b/core/src/main/java/hudson/model/StringParameterDefinition.java
@@ -0,0 +1,71 @@
+package hudson.model;
+
+import net.sf.json.JSONObject;
+
+import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.StaplerRequest;
+
+/**
+ * Parameter whose value is a string value.
+ */
+public class StringParameterDefinition extends ParameterDefinition {
+
+    private boolean optional;
+    private String defaultValue;
+
+    @DataBoundConstructor
+    public StringParameterDefinition(String name, String defaultValue,
+                                     boolean optional) {
+        super(name);
+        this.defaultValue = defaultValue;
+        this.optional = optional;
+    }
+
+    @Override
+    public ParameterDescriptor getDescriptor() {
+        return DESCRIPTOR;
+    }
+
+    public boolean isOptional() {
+        return optional;
+    }
+
+    public void setOptional(boolean optional) {
+        this.optional = optional;
+    }
+
+    public String getDefaultValue() {
+        return defaultValue;
+    }
+
+    public void setDefaultValue(String defaultValue) {
+        this.defaultValue = defaultValue;
+    }
+
+    public static final ParameterDescriptor DESCRIPTOR = new DescriptorImpl();
+
+    public static class DescriptorImpl extends ParameterDescriptor {
+
+        protected DescriptorImpl() {
+            super(StringParameterDefinition.class);
+        }
+
+        @Override
+        public String getDisplayName() {
+            return "String Parameter";
+        }
+
+        @Override
+        public ParameterDefinition newInstance(StaplerRequest req,
+                                               JSONObject formData) throws FormException {
+            return req.bindJSON(StringParameterDefinition.class, formData);
+        }
+
+    }
+
+    @Override
+    public ParameterValue createValue(StaplerRequest req, JSONObject jo) {
+        return req.bindJSON(StringParameterValue.class, jo);
+    }
+
+}
diff --git a/core/src/main/java/hudson/model/StringParameterValue.java b/core/src/main/java/hudson/model/StringParameterValue.java
new file mode 100644
index 0000000000000000000000000000000000000000..04c25caa7665e80a9c5e241dda22d3a2ca6e7e85
--- /dev/null
+++ b/core/src/main/java/hudson/model/StringParameterValue.java
@@ -0,0 +1,26 @@
+package hudson.model;
+
+import org.kohsuke.stapler.DataBoundConstructor;
+
+import java.util.Map;
+
+/**
+ * {@link ParameterValue} created from {@link StringParameterDefinition}.
+ */
+public class StringParameterValue extends ParameterValue {
+    public final String value;
+
+    @DataBoundConstructor
+    public StringParameterValue(String name, String value) {
+        super(name);
+        this.value = value;
+    }
+
+    /**
+     * Exposes the name/value as an environment variable.
+     */
+    @Override
+    public void buildEnvVars(AbstractBuild<?,?> build, Map<String,String> env) {
+        env.put(name.toUpperCase(),value);
+    }
+}
diff --git a/core/src/main/java/hudson/model/listeners/RunListener.java b/core/src/main/java/hudson/model/listeners/RunListener.java
index 12d6fc883243d83e39af5a4e30dcf5005913fb5a..ca3071ad8a5b76272c9297dc1db7402adc1c6089 100644
--- a/core/src/main/java/hudson/model/listeners/RunListener.java
+++ b/core/src/main/java/hudson/model/listeners/RunListener.java
@@ -36,6 +36,19 @@ public abstract class RunListener<R extends Run> implements ExtensionPoint {
      *      the build is considered completed, so its status cannot be changed anymore.
      */
     public void onCompleted(R r, TaskListener listener) {}
+    
+    /**
+     * Called when a build is started (i.e. it was in the queue, and will now start running
+     * on an executor)
+     *
+     * @param r
+     *      The started build.
+     * @param listener
+     *      The listener for this build. This can be used to produce log messages, for example,
+     *      which becomes a part of the "console output" of this build. But when this method runs,
+     *      the build is considered completed, so its status cannot be changed anymore.
+     */
+    public void onStarted(R r, TaskListener listener) {}
 
     /**
      * Registers this object as an active listener so that it can start getting
@@ -66,4 +79,14 @@ public abstract class RunListener<R extends Run> implements ExtensionPoint {
                 l.onCompleted(r,listener);
         }
     }
+
+    /**
+     * Fires the {@link #onStarted} event.
+     */
+    public static void fireStarted(Run r, TaskListener listener) {
+        for (RunListener l : LISTENERS) {
+            if(l.targetType.isInstance(r))
+                l.onStarted(r,listener);
+        }
+    }
 }
diff --git a/core/src/main/java/hudson/security/AuthorizationMatrixProperty.java b/core/src/main/java/hudson/security/AuthorizationMatrixProperty.java
new file mode 100644
index 0000000000000000000000000000000000000000..a65bd2fab81e94f7944d2f1f9c031b6a23e4d796
--- /dev/null
+++ b/core/src/main/java/hudson/security/AuthorizationMatrixProperty.java
@@ -0,0 +1,238 @@
+package hudson.security;
+
+import hudson.model.Item;
+import hudson.model.Job;
+import hudson.model.JobProperty;
+import hudson.model.JobPropertyDescriptor;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.Map.Entry;
+
+import net.sf.json.JSONObject;
+
+import org.acegisecurity.Authentication;
+import org.acegisecurity.acls.sid.GrantedAuthoritySid;
+import org.acegisecurity.acls.sid.PrincipalSid;
+import org.acegisecurity.acls.sid.Sid;
+import org.kohsuke.stapler.StaplerRequest;
+
+import com.thoughtworks.xstream.converters.Converter;
+import com.thoughtworks.xstream.converters.MarshallingContext;
+import com.thoughtworks.xstream.converters.UnmarshallingContext;
+import com.thoughtworks.xstream.io.HierarchicalStreamReader;
+import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
+
+public class AuthorizationMatrixProperty extends JobProperty<Job<?, ?>> {
+
+	public static final JobPropertyDescriptor DESCRIPTOR = new DescriptorImpl();
+
+	private transient ACL acl = new AclImpl();
+
+	private boolean useProjectSecurity;
+
+	public boolean isUseProjectSecurity() {
+		return useProjectSecurity;
+	}
+
+	public void setUseProjectSecurity(boolean useProjectSecurity) {
+		this.useProjectSecurity = useProjectSecurity;
+	}
+
+	/**
+	 * List up all permissions that are granted.
+	 * 
+	 * Strings are either the granted authority or the principal, which is not
+	 * distinguished.
+	 */
+	private final Map<Permission, Set<String>> grantedPermissions = new HashMap<Permission, Set<String>>();
+
+	private Set<String> sids = new HashSet<String>();
+
+	public Set<String> getGroups() {
+		return sids;
+	}
+
+	/**
+	 * Returns all SIDs configured in this matrix, minus "anonymous"
+	 * 
+	 * @return Always non-null.
+	 */
+	public List<String> getAllSIDs() {
+		Set<String> r = new HashSet<String>();
+		for (Set<String> set : grantedPermissions.values())
+			r.addAll(set);
+		r.remove("anonymous");
+
+		String[] data = r.toArray(new String[r.size()]);
+		Arrays.sort(data);
+		return Arrays.asList(data);
+	}
+
+	/**
+	 * Adds to {@link #grantedPermissions}. Use of this method should be limited
+	 * during construction, as this object itself is considered immutable once
+	 * populated.
+	 */
+	protected void add(Permission p, String sid) {
+		Set<String> set = grantedPermissions.get(p);
+		if (set == null)
+			grantedPermissions.put(p, set = new HashSet<String>());
+		set.add(sid);
+		sids.add(sid);
+	}
+
+	@Override
+	public JobPropertyDescriptor getDescriptor() {
+		return DESCRIPTOR;
+	}
+
+	public static class DescriptorImpl extends JobPropertyDescriptor {
+
+		@Override
+		public JobProperty<?> newInstance(StaplerRequest req,
+				JSONObject formData) throws FormException {
+			boolean useProjectSecurity = formData.has("useProjectSecurity");
+			AuthorizationMatrixProperty amp = new AuthorizationMatrixProperty();
+			amp.setUseProjectSecurity(useProjectSecurity);
+			for (Map.Entry<String, Object> r : (Set<Map.Entry<String, Object>>) formData
+					.getJSONObject("data").entrySet()) {
+				String sid = r.getKey();
+				if (r.getValue() instanceof JSONObject) {
+					for (Map.Entry<String, Boolean> e : (Set<Map.Entry<String, Boolean>>) ((JSONObject) r
+							.getValue()).entrySet()) {
+						if (e.getValue()) {
+							Permission p = Permission.fromId(e.getKey());
+							amp.add(p, sid);
+						}
+					}
+				}
+			}
+			return amp;
+		}
+
+		protected DescriptorImpl() {
+			super(AuthorizationMatrixProperty.class);
+		}
+
+		@Override
+		public boolean isApplicable(Class<? extends Job> jobType) {
+			return true;
+		}
+
+		@Override
+		public String getDisplayName() {
+			return "Authorization Matrix";
+		}
+
+		public List<PermissionGroup> getAllGroups() {
+			return Collections.singletonList(PermissionGroup.get(Item.class));
+		}
+
+	}
+
+	private final class AclImpl extends SidACL {
+		protected Boolean hasPermission(Sid sid, Permission p) {
+			String s = toString(sid);
+			for (; p != null; p = p.impliedBy) {
+				Set<String> set = grantedPermissions.get(p);
+				if (set != null && set.contains(s))
+					return true;
+			}
+			return false;
+		}
+
+		protected Boolean _hasPermission(Authentication a, Permission permission) {
+			Boolean b = super._hasPermission(a, permission);
+			// permissions granted to anonymous users are granted to everyone
+			if (b == null)
+				b = hasPermission(ANONYMOUS, permission);
+			return b;
+		}
+
+		private String toString(Sid p) {
+			if (p instanceof GrantedAuthoritySid)
+				return ((GrantedAuthoritySid) p).getGrantedAuthority();
+			if (p instanceof PrincipalSid)
+				return ((PrincipalSid) p).getPrincipal();
+			// hmm...
+			return p.toString();
+		}
+	}
+
+	private Object readResolve() {
+		acl = new AclImpl();
+		return this;
+	}
+
+	public ACL getACL() {
+		return acl;
+	}
+
+	/**
+	 * Checks if the given SID has the given permission.
+	 */
+	public boolean hasPermission(String sid, Permission p) {
+		for (; p != null; p = p.impliedBy) {
+			Set<String> set = grantedPermissions.get(p);
+			if (set != null && set.contains(sid))
+				return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Works like {@link #add(Permission, String)} but takes both parameters
+	 * from a single string of the form <tt>PERMISSIONID:sid</tt>
+	 */
+	private void add(String shortForm) {
+		int idx = shortForm.indexOf(':');
+		add(Permission.fromId(shortForm.substring(0, idx)), shortForm
+				.substring(idx + 1));
+	}
+
+	/**
+	 * Persist {@link ProjectMatrixAuthorizationStrategy} as a list of IDs that
+	 * represent {@link ProjectMatrixAuthorizationStrategy#grantedPermissions}.
+	 */
+	public static final class ConverterImpl implements Converter {
+		public boolean canConvert(Class type) {
+			return type == AuthorizationMatrixProperty.class;
+		}
+
+		public void marshal(Object source, HierarchicalStreamWriter writer,
+				MarshallingContext context) {
+			AuthorizationMatrixProperty amp = (AuthorizationMatrixProperty) source;
+
+			for (Entry<Permission, Set<String>> e : amp.grantedPermissions
+					.entrySet()) {
+				String p = e.getKey().getId();
+				for (String sid : e.getValue()) {
+					writer.startNode("permission");
+					context.convertAnother(p + ':' + sid);
+					writer.endNode();
+				}
+			}
+
+		}
+
+		public Object unmarshal(HierarchicalStreamReader reader,
+				final UnmarshallingContext context) {
+			AuthorizationMatrixProperty as = new AuthorizationMatrixProperty();
+
+			while (reader.hasMoreChildren()) {
+				reader.moveDown();
+				String id = (String) context.convertAnother(as, String.class);
+				as.add(id);
+				reader.moveUp();
+			}
+
+			return as;
+		}
+	}
+}
diff --git a/core/src/main/java/hudson/security/AuthorizationStrategy.java b/core/src/main/java/hudson/security/AuthorizationStrategy.java
index 5788511e0eaab97556735c09bf28f3e74102c2a4..a3f8b747ef42de00b5f6d64985154c42ae09f00e 100644
--- a/core/src/main/java/hudson/security/AuthorizationStrategy.java
+++ b/core/src/main/java/hudson/security/AuthorizationStrategy.java
@@ -173,7 +173,8 @@ public abstract class AuthorizationStrategy implements Describable<Authorization
             LIST.load(FullControlOnceLoggedInAuthorizationStrategy.class);
             LIST.load(GlobalMatrixAuthorizationStrategy.class);
             LIST.load(LegacyAuthorizationStrategy.class);
-
+            LIST.load(ProjectMatrixAuthorizationStrategy.class);
+            
             // can't do this in the constructor due to the initialization order
             LIST.add(Unsecured.DESCRIPTOR);
         }
diff --git a/core/src/main/java/hudson/security/ProjectBasedAuthorizationStrategy.java b/core/src/main/java/hudson/security/ProjectBasedAuthorizationStrategy.java
deleted file mode 100644
index 6eee05ec8e2d6ad3641df9f25f92e322e9c7ce95..0000000000000000000000000000000000000000
--- a/core/src/main/java/hudson/security/ProjectBasedAuthorizationStrategy.java
+++ /dev/null
@@ -1,91 +0,0 @@
-package hudson.security;
-
-import hudson.model.AbstractProject;
-import hudson.model.Computer;
-import hudson.model.Descriptor;
-import hudson.model.Hudson;
-import hudson.model.Item;
-import hudson.model.View;
-import hudson.util.FormFieldValidator;
-
-import java.util.Collections;
-import java.util.List;
-
-import net.sf.json.JSONObject;
-
-import org.acegisecurity.GrantedAuthority;
-import org.acegisecurity.GrantedAuthorityImpl;
-import org.acegisecurity.acls.sid.GrantedAuthoritySid;
-import org.kohsuke.stapler.StaplerRequest;
-
-/**
- * {@link AuthorizationStrategy} that grants control based on owned permissions.
- */
-// TODO: ask Tom to explain what this class is.
-public class ProjectBasedAuthorizationStrategy extends AuthorizationStrategy {
-    @Override
-    public ACL getRootACL() {
-        return ROOT_ACL;
-    }
-
-    @Override
-	public ACL getACL(AbstractProject<?, ?> project) {
-    	SparseACL acl = new SparseACL(ROOT_ACL);
-    	acl.add(new GrantedAuthoritySid(createItemAuthority(project)), Permission.FULL_CONTROL, true);
-    	return acl;
-	}
-
-    @Override
-	public ACL getACL(Computer computer) {
-    	SparseACL acl = new SparseACL(ROOT_ACL);
-    	acl.add(ACL.ANONYMOUS, Hudson.ADMINISTER, false);
-    	acl.add(ACL.EVERYONE, Hudson.ADMINISTER, true);
-    	return acl;
-	}
-
-	@Override
-	public ACL getACL(View view) {
-    	SparseACL acl = new SparseACL(ROOT_ACL);
-    	acl.add(ACL.ANONYMOUS, Permission.CREATE, false);
-    	acl.add(ACL.EVERYONE, Permission.CREATE, true);
-    	return acl;
-	}
-
-    public List<String> getGroups() {
-        return Collections.emptyList();
-    }
-
-    public static final SparseACL ROOT_ACL = new SparseACL(null);
-
-    static {
-    	ROOT_ACL.add(new GrantedAuthoritySid("admin"), Permission.FULL_CONTROL, true);
-    	ROOT_ACL.add(ACL.ANONYMOUS,FormFieldValidator.CHECK,false);
-        ROOT_ACL.add(ACL.EVERYONE,FormFieldValidator.CHECK,true);
-        ROOT_ACL.add(ACL.ANONYMOUS, Permission.CREATE, false);
-        ROOT_ACL.add(ACL.EVERYONE, Permission.CREATE, true);
-        ROOT_ACL.add(ACL.EVERYONE,Permission.READ,true);
-        ROOT_ACL.add(ACL.EVERYONE,Permission.FULL_CONTROL,false);
-    }
-    
-    public GrantedAuthority createItemAuthority(Item item) {
-    	return new GrantedAuthorityImpl(item.getFullName());
-    }
-
-    public Descriptor<AuthorizationStrategy> getDescriptor() {
-        return DESCRIPTOR;
-    }
-
-    public static final Descriptor<AuthorizationStrategy> DESCRIPTOR = new Descriptor<AuthorizationStrategy>(ProjectBasedAuthorizationStrategy.class) {
-        public String getDisplayName() {
-            return "Project Based Access Control";
-        }
-
-        public AuthorizationStrategy newInstance(StaplerRequest req, JSONObject formData) throws FormException {
-            return new ProjectBasedAuthorizationStrategy();
-        }
-
-        public String getHelpFile() {
-            return "/help/security/full-control-once-logged-in.html";
-        }
-    };
-}
diff --git a/core/src/main/java/hudson/security/ProjectMatrixAuthorizationStrategy.java b/core/src/main/java/hudson/security/ProjectMatrixAuthorizationStrategy.java
new file mode 100644
index 0000000000000000000000000000000000000000..0ae6fb8bf7cb14ccc3f4c7b7277f7a96054bc648
--- /dev/null
+++ b/core/src/main/java/hudson/security/ProjectMatrixAuthorizationStrategy.java
@@ -0,0 +1,230 @@
+package hudson.security;
+
+import com.thoughtworks.xstream.converters.Converter;
+import com.thoughtworks.xstream.converters.MarshallingContext;
+import com.thoughtworks.xstream.converters.UnmarshallingContext;
+import com.thoughtworks.xstream.io.HierarchicalStreamReader;
+import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
+
+import hudson.model.AbstractProject;
+import hudson.model.Descriptor;
+import hudson.model.Job;
+import hudson.model.JobProperty;
+import hudson.model.Jobs;
+import net.sf.json.JSONObject;
+import org.acegisecurity.Authentication;
+import org.acegisecurity.acls.sid.GrantedAuthoritySid;
+import org.acegisecurity.acls.sid.PrincipalSid;
+import org.acegisecurity.acls.sid.Sid;
+import org.kohsuke.stapler.StaplerRequest;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+/**
+ * Role-based authorization via a matrix.
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public class ProjectMatrixAuthorizationStrategy extends AuthorizationStrategy {
+    protected transient ACL acl = new AclImpl();
+
+    /**
+     * List up all permissions that are granted.
+     *
+     * Strings are either the granted authority or the principal,
+     * which is not distinguished.
+     */
+    private final Map<Permission,Set<String>> grantedPermissions = new HashMap<Permission, Set<String>>();
+
+    private final Set<String> sids = new HashSet<String>();
+
+    /**
+     * Adds to {@link #grantedPermissions}.
+     * Use of this method should be limited during construction,
+     * as this object itself is considered immutable once populated.
+     */
+    protected void add(Permission p, String sid) {
+        Set<String> set = grantedPermissions.get(p);
+        if(set==null)
+            grantedPermissions.put(p,set = new HashSet<String>());
+        set.add(sid);
+        sids.add(sid);
+    }
+
+	/**
+     * Works like {@link #add(Permission, String)} but takes both parameters
+     * from a single string of the form <tt>PERMISSIONID:sid</tt>
+     */
+    private void add(String shortForm) {
+        int idx = shortForm.indexOf(':');
+        add(Permission.fromId(shortForm.substring(0,idx)),shortForm.substring(idx+1));
+    }
+
+    @Override
+    public ACL getRootACL() {
+        return acl;
+    }
+
+    @Override
+	public ACL getACL(AbstractProject<?, ?> project) {
+    	AuthorizationMatrixProperty amp = project.getProperty(AuthorizationMatrixProperty.class);
+    	if (amp != null && amp.isUseProjectSecurity()) {
+    		return amp.getACL();
+    	} else {
+    		return getRootACL();
+    	}
+	}
+
+    public Set<String> getGroups() {
+        return sids;
+    }
+
+    private Object readResolve() {
+        acl = new AclImpl();
+        return this;
+    }
+
+    /**
+     * Checks if the given SID has the given permission.
+     */
+    public boolean hasPermission(String sid, Permission p) {
+        for(; p!=null; p=p.impliedBy) {
+            Set<String> set = grantedPermissions.get(p);
+            if(set!=null && set.contains(sid))
+                return true;
+        }
+        return false;
+    }
+
+    /**
+     * Returns all SIDs configured in this matrix, minus "anonymous"
+     *
+     * @return
+     *      Always non-null.
+     */
+    public List<String> getAllSIDs() {
+        Set<String> r = new HashSet<String>();
+        for (Set<String> set : grantedPermissions.values())
+            r.addAll(set);
+        r.remove("anonymous");
+
+        String[] data = r.toArray(new String[r.size()]);
+        Arrays.sort(data);
+        return Arrays.asList(data);
+    }
+
+    protected final class AclImpl extends SidACL {
+        protected Boolean hasPermission(Sid p, Permission permission) {
+            if(ProjectMatrixAuthorizationStrategy.this.hasPermission(toString(p),permission))
+                return true;
+            return null;
+        }
+
+        protected Boolean _hasPermission(Authentication a, Permission permission) {
+            Boolean b = super._hasPermission(a,permission);
+            // permissions granted to anonymous users are granted to everyone
+            if(b==null) b=hasPermission(ANONYMOUS,permission);
+            return b;
+        }
+
+        private String toString(Sid p) {
+            if (p instanceof GrantedAuthoritySid)
+                return ((GrantedAuthoritySid) p).getGrantedAuthority();
+            if (p instanceof PrincipalSid)
+                return ((PrincipalSid) p).getPrincipal();
+            // hmm...
+            return p.toString();
+        }
+    }
+
+    public Descriptor<AuthorizationStrategy> getDescriptor() {
+        return DESCRIPTOR;
+    }
+
+    public static final Descriptor<AuthorizationStrategy> DESCRIPTOR = new DescriptorImpl();
+
+    /**
+     * Persist {@link ProjectMatrixAuthorizationStrategy} as a list of IDs that
+     * represent {@link ProjectMatrixAuthorizationStrategy#grantedPermissions}.
+     */
+    public static final class ConverterImpl implements Converter {
+        public boolean canConvert(Class type) {
+            return type== ProjectMatrixAuthorizationStrategy.class;
+        }
+
+        public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
+            ProjectMatrixAuthorizationStrategy strategy = (ProjectMatrixAuthorizationStrategy)source;
+
+            for (Entry<Permission, Set<String>> e : strategy.grantedPermissions.entrySet()) {
+                String p = e.getKey().getId();
+                for (String sid : e.getValue()) {
+                    writer.startNode("permission");
+                    context.convertAnother(p+':'+sid);
+                    writer.endNode();
+                }
+            }
+
+        }
+
+        public Object unmarshal(HierarchicalStreamReader reader, final UnmarshallingContext context) {
+            ProjectMatrixAuthorizationStrategy as = new ProjectMatrixAuthorizationStrategy();
+
+            while (reader.hasMoreChildren()) {
+                reader.moveDown();
+                String id = (String)context.convertAnother(as,String.class);
+                as.add(id);
+                reader.moveUp();
+            }
+
+            return as;
+        }
+    }
+    
+    static {
+        LIST.add(DESCRIPTOR);
+        Jobs.PROPERTIES.add(AuthorizationMatrixProperty.DESCRIPTOR);
+    }
+
+    public static final class DescriptorImpl extends Descriptor<AuthorizationStrategy> {
+        public DescriptorImpl() {
+            super(ProjectMatrixAuthorizationStrategy.class);
+        }
+
+        public String getDisplayName() {
+            return "Project-based Matrix Authorization Strategy";
+        }
+
+        public AuthorizationStrategy newInstance(StaplerRequest req, JSONObject formData) throws FormException {
+            ProjectMatrixAuthorizationStrategy gmas = new ProjectMatrixAuthorizationStrategy();
+            for(Map.Entry<String,JSONObject> r : (Set<Map.Entry<String,JSONObject>>)formData.getJSONObject("data").entrySet()) {
+                String sid = r.getKey();
+                for(Map.Entry<String,Boolean> e : (Set<Map.Entry<String,Boolean>>)r.getValue().entrySet()) {
+                    if(e.getValue()) {
+                        Permission p = Permission.fromId(e.getKey());
+                        gmas.add(p,sid);
+                    }
+                }
+            }
+            return gmas;
+        }
+
+        public String getHelpFile() {
+            return "/help/security/global-matrix.html";
+        }
+
+        public List<PermissionGroup> getAllGroups() {
+            List<PermissionGroup> groups = new ArrayList<PermissionGroup>(PermissionGroup.getAll());
+            groups.remove(PermissionGroup.get(Permission.class));
+            return groups;
+        }
+    }
+
+}
+
diff --git a/core/src/main/java/hudson/tasks/Ant.java b/core/src/main/java/hudson/tasks/Ant.java
index 8f90b5f5e1b04667204a70bc929358c102b2bbbe..f792255d7edb8f608d63ab55f15070d7757f972f 100644
--- a/core/src/main/java/hudson/tasks/Ant.java
+++ b/core/src/main/java/hudson/tasks/Ant.java
@@ -10,6 +10,7 @@ import hudson.model.AbstractBuild;
 import hudson.model.AbstractProject;
 import hudson.model.BuildListener;
 import hudson.model.Descriptor;
+import hudson.model.ParametersAction;
 import hudson.model.TaskListener;
 import hudson.remoting.Callable;
 import hudson.util.ArgumentListBuilder;
@@ -105,6 +106,11 @@ public class Ant extends Builder {
     public boolean perform(AbstractBuild<?,?> build, Launcher launcher, BuildListener listener) throws InterruptedException, IOException {
         AbstractProject proj = build.getProject();
 
+        String targets = this.targets;
+        ParametersAction parameters = build.getAction(ParametersAction.class);
+        if (parameters != null)
+            targets = parameters.substitute(build,targets);
+
         ArgumentListBuilder args = new ArgumentListBuilder();
 
         String execName;
diff --git a/core/src/main/java/hudson/tasks/Maven.java b/core/src/main/java/hudson/tasks/Maven.java
index 8c403ef5671e3db4dece60e2dec4aaaf6919a2eb..b4bd568bd4f8f643ec376fdfaf4bcdc267e7088e 100644
--- a/core/src/main/java/hudson/tasks/Maven.java
+++ b/core/src/main/java/hudson/tasks/Maven.java
@@ -15,6 +15,7 @@ import hudson.model.AbstractBuild;
 import hudson.model.AbstractProject;
 import hudson.model.BuildListener;
 import hudson.model.Descriptor;
+import hudson.model.ParametersAction;
 import hudson.remoting.Callable;
 import hudson.remoting.VirtualChannel;
 import hudson.util.ArgumentListBuilder;
@@ -125,6 +126,11 @@ public class Maven extends Builder {
     public boolean perform(AbstractBuild<?,?> build, Launcher launcher, BuildListener listener) throws IOException, InterruptedException {
         AbstractProject proj = build.getProject();
 
+        String targets = this.targets;
+        ParametersAction parameters = build.getAction(ParametersAction.class);
+        if (parameters != null)
+            targets = parameters.substitute(build,targets);
+
         int startIndex = 0;
         int endIndex;
         do {
diff --git a/core/src/main/java/hudson/triggers/Trigger.java b/core/src/main/java/hudson/triggers/Trigger.java
index 5b03a62d99e2d3a28b9adf297e4eb2993ee18d5b..c43824752998b2402eea7d4730e396aa66b98a86 100644
--- a/core/src/main/java/hudson/triggers/Trigger.java
+++ b/core/src/main/java/hudson/triggers/Trigger.java
@@ -203,7 +203,7 @@ public abstract class Trigger<J extends Item> implements Describable<Trigger<?>>
      * This timer is available for all the components inside Hudson to schedule
      * some work.
      */
-    public static final Timer timer = new Timer("Hudson cron thread");
+    public static Timer timer;
 
     public static void init() {
         long MIN = 1000*60;
diff --git a/core/src/main/java/hudson/util/PluginServletFilter.java b/core/src/main/java/hudson/util/PluginServletFilter.java
index 2ef98d6e9b2aac9b8b69487dc00da47c8b797137..2bb8c5e727c1867bc094be13489877c8ea5ee98d 100644
--- a/core/src/main/java/hudson/util/PluginServletFilter.java
+++ b/core/src/main/java/hudson/util/PluginServletFilter.java
@@ -16,14 +16,29 @@ import java.util.Collection;
  */
 public class PluginServletFilter implements Filter {
 
-	public static CopyOnWriteList<Filter> LIST = new CopyOnWriteList<Filter>();
+	private static CopyOnWriteList<Filter> LIST = new CopyOnWriteList<Filter>();
+	
+	private static FilterConfig filterConfig;
     
     public PluginServletFilter() {
     }
 
     public void init(FilterConfig filterConfig) throws ServletException {
-        for (Filter f : LIST)
-            f.init(filterConfig);
+    	this.filterConfig = filterConfig;
+    	synchronized (LIST)  {
+    		for (Filter f : LIST) {
+    			f.init(filterConfig);
+    		}
+    	}
+    }
+    
+    public static void addFilter(Filter filter) throws ServletException {
+    	synchronized (LIST) {
+    		if (filterConfig != null) {
+    			filter.init(filterConfig);
+    		}
+    		LIST.add(filter);
+    	}
     }
 
     public void doFilter(ServletRequest request, ServletResponse response, final FilterChain chain) throws IOException, ServletException {
diff --git a/core/src/main/java/hudson/util/QueueTaskFilter.java b/core/src/main/java/hudson/util/QueueTaskFilter.java
new file mode 100644
index 0000000000000000000000000000000000000000..50a6d725001fc2b68730c6d73fb87a447a5e2b39
--- /dev/null
+++ b/core/src/main/java/hudson/util/QueueTaskFilter.java
@@ -0,0 +1,80 @@
+package hudson.util;
+
+import hudson.model.Queue;
+import hudson.model.Label;
+import hudson.model.Node;
+import hudson.model.ResourceList;
+
+import java.io.IOException;
+
+/**
+ * Convenient base class for {@link Queue.Task} decorators.
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public abstract class QueueTaskFilter implements Queue.Task {
+    /**
+     * Delegation target.
+     */
+    protected volatile Queue.Task delegate;
+
+    protected QueueTaskFilter(Queue.Task delegate) {
+        this.delegate = delegate;
+    }
+
+    protected QueueTaskFilter() {
+    }
+
+    public Label getAssignedLabel() {
+        return delegate.getAssignedLabel();
+    }
+
+    public Node getLastBuiltOn() {
+        return delegate.getLastBuiltOn();
+    }
+
+    public boolean isBuildBlocked() {
+        return delegate.isBuildBlocked();
+    }
+
+    public String getWhyBlocked() {
+        return delegate.getWhyBlocked();
+    }
+
+    public String getName() {
+        return delegate.getName();
+    }
+
+    public String getFullDisplayName() {
+        return delegate.getFullDisplayName();
+    }
+
+    public long getEstimatedDuration() {
+        return delegate.getEstimatedDuration();
+    }
+
+    public Queue.Executable createExecutable() throws IOException {
+        return delegate.createExecutable();
+    }
+
+    public void checkAbortPermission() {
+        delegate.checkAbortPermission();
+    }
+
+    public boolean hasAbortPermission() {
+        return delegate.hasAbortPermission();
+    }
+
+    public String getDisplayName() {
+        return delegate.getDisplayName();
+    }
+
+    public ResourceList getResourceList() {
+        return delegate.getResourceList();
+    }
+
+    // Queue.Task hashCode and equals need to be implemented to provide value equality semantics
+    public abstract int hashCode();
+
+    public abstract boolean equals(Object obj);
+}
diff --git a/core/src/main/java/hudson/util/VariableResolver.java b/core/src/main/java/hudson/util/VariableResolver.java
new file mode 100644
index 0000000000000000000000000000000000000000..5b01eaa652840c764f3e7cabc27dcce8dd28b197
--- /dev/null
+++ b/core/src/main/java/hudson/util/VariableResolver.java
@@ -0,0 +1,78 @@
+package hudson.util;
+
+import java.util.Map;
+import java.util.Collection;
+
+/**
+ * Resolves variables to its value, while encapsulating
+ * how that resolution happens.
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public interface VariableResolver<V> {
+    /**
+     * Receives a variable name and obtains the value associated with the name.
+     *
+     * <p>
+     * This can be implemented simply on top of a {@link Map} (see {@link ByMap}), or
+     * this can be used like an expression evaluator.
+     *
+     * @param name
+     *      Name of the variable to be resolved.
+     *      Never null, never empty. The name shouldn't include the syntactic
+     *      marker of an expression. IOW, it should be "foo" but not "${foo}".
+     *      A part of the goal of this design is to abstract away the expression
+     *      marker syntax. 
+     * @return
+     *      Object referenced by the name.
+     *      Null if not found.
+     */
+    V resolve(String name);
+
+    /**
+     * Empty resolver that always returns null.
+     */
+    public static final VariableResolver NONE = new VariableResolver() {
+        public Object resolve(String name) {
+            return null;
+        }
+    };
+
+    /**
+     * {@link VariableResolver} backed by a {@link Map}.
+     */
+    public static final class ByMap<V> implements VariableResolver<V> {
+        private final Map<String,V> data;
+
+        public ByMap(Map<String, V> data) {
+            this.data = data;
+        }
+
+        public V resolve(String name) {
+            return data.get(name);
+        }
+    }
+
+    /**
+     * Union of multiple {@link VariableResolver}.
+     */
+    public static final class Union<V> implements VariableResolver<V> {
+        private final VariableResolver<? extends V>[] resolvers;
+
+        public Union(VariableResolver<? extends V>... resolvers) {
+            this.resolvers = resolvers;
+        }
+
+        public Union(Collection<? extends VariableResolver<? extends V>> resolvers) {
+            this.resolvers = resolvers.toArray(new VariableResolver[resolvers.size()]);
+        }
+
+        public V resolve(String name) {
+            for (VariableResolver<? extends V> r : resolvers) {
+                V v = r.resolve(name);
+                if(v!=null) return v;
+            }
+            return null;
+        }
+    }
+}
diff --git a/core/src/main/resources/hudson/model/AbstractProject/sidepanel.jelly b/core/src/main/resources/hudson/model/AbstractProject/sidepanel.jelly
index 3797dcee96fa4e43e6bcbfe6efb7d05912bfa028..6c96005e43022365b6ab5b4e7e4ea45241be5d75 100644
--- a/core/src/main/resources/hudson/model/AbstractProject/sidepanel.jelly
+++ b/core/src/main/resources/hudson/model/AbstractProject/sidepanel.jelly
@@ -1,7 +1,7 @@
 <!--
   Side panel for the project view.
 -->
-<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:i="jelly:fmt">
+<j:jelly xmlns:j="jelly:core" xmlns:x="jelly:xml" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form" xmlns:i="jelly:fmt">
   <l:header title="${it.name}">
     <st:include page="rssHeader.jelly" />
     <link rel="alternate" title="Hudson:${it.name} (changelog)" href="rssChangelog" type="application/rss+xml" />
@@ -16,7 +16,8 @@
       <l:task icon="images/24x24/folder.gif"  href="${url}/ws/" title="${%Workspace}" permission="${it.WORKSPACE}" />
       <j:if test="${it.configurable}">
         <j:if test="${!it.disabled}">
-          <l:task icon="images/24x24/clock.gif" href="${url}/build?delay=0sec" title="${%Build Now}" onclick="return build(this)" permission="${it.BUILD}" />
+          <l:task icon="images/24x24/clock.gif" href="${url}/build?delay=0sec" title="${%Build Now}"
+                  onclick="${h.ifThenElse(it.parameterized,null,'return build(this)')}" permission="${it.BUILD}" />
           <script>
             function build(a) {
               new Ajax.Request(a.href,{method:"post"});
diff --git a/core/src/main/resources/hudson/model/ParameterDefinition/config.jelly b/core/src/main/resources/hudson/model/ParameterDefinition/config.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..39f265428262252398f6f31530ebc191a1f57f58
--- /dev/null
+++ b/core/src/main/resources/hudson/model/ParameterDefinition/config.jelly
@@ -0,0 +1,8 @@
+<!--
+  This Jelly view shows UI for configuring parameter definitions as a part of the job configuration.
+-->
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form"
+	xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project">
+	<f:textbox name="parameter.name" value="${instance.name}"/>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/model/ParametersAction/index.jelly b/core/src/main/resources/hudson/model/ParametersAction/index.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..3fb3361bdf4620c5834725b28d21c295a4522c51
--- /dev/null
+++ b/core/src/main/resources/hudson/model/ParametersAction/index.jelly
@@ -0,0 +1,16 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form"
+	xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project">
+	<l:layout title="${it.displayName}">
+		<st:include page="sidepanel.jelly" it="${it.build}" />
+		<l:main-panel>
+			<h1>${%Build} #${it.build.number}</h1>
+			<l:pane title="Parameters" width="3">
+			<j:forEach var="parameterValue" items="${it.parameters}">
+				<st:include it="${parameterValue}"
+					page="value.jelly" />
+			</j:forEach>
+			</l:pane>
+		</l:main-panel>
+	</l:layout>
+</j:jelly>
diff --git a/core/src/main/resources/hudson/model/ParametersDefinitionProperty/config.jelly b/core/src/main/resources/hudson/model/ParametersDefinitionProperty/config.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..2f76a7c770cfe4d8654e54c7b557aef0441e14c9
--- /dev/null
+++ b/core/src/main/resources/hudson/model/ParametersDefinitionProperty/config.jelly
@@ -0,0 +1,12 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form"
+	xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project">
+  <f:optionalBlock name="parameterized" title="${%This build is parameterized}"
+          checked="${instance!=null}" help="/help/project-config/parameterized-build.html">
+    <f:nested>
+      <f:hetero-list name="parameter" hasHeader="true"
+        descriptors="${h.getParameterDescriptors()}" items="${instance.parameterDefinitions}"
+        addCaption="${%Add Parameter}" />
+    </f:nested>
+  </f:optionalBlock>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/model/ParametersDefinitionProperty/index.jelly b/core/src/main/resources/hudson/model/ParametersDefinitionProperty/index.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..39deff7d6e3f8691425dd77185c26e6eb97b0b1a
--- /dev/null
+++ b/core/src/main/resources/hudson/model/ParametersDefinitionProperty/index.jelly
@@ -0,0 +1,28 @@
+<!--
+  This view is rendered as /hudson/job/XYZ/build
+-->
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form"
+	xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project">
+  <!--
+    send back 4xx code so that machine agents don't confuse this form with successful build triggering
+    405 is "Method Not Allowed" and this fits here because we need POST.
+  -->
+  <st:statusCode value="405" />
+  <l:layout title="${it.displayName}">
+	<st:include page="sidepanel.jelly" it="${it.project}" />
+		<l:main-panel>
+			<h1>${it.owner.pronoun} ${it.owner.displayName}</h1>
+      <p>${%description}</p>
+      <f:form method="post" action="build">
+				<j:forEach var="parameterDefinition" items="${it.parameterDefinitions}">
+					<st:include it="${parameterDefinition}"
+						page="${parameterDefinition.descriptor.valuePage}" />
+				</j:forEach>
+				<f:block>
+					<f:submit value="${%Build}" />
+				</f:block>
+			</f:form>
+		</l:main-panel>
+	</l:layout>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/model/ParametersDefinitionProperty/index.properties b/core/src/main/resources/hudson/model/ParametersDefinitionProperty/index.properties
new file mode 100644
index 0000000000000000000000000000000000000000..18cbed9144e888607522a5a90b1537c6d1c05aeb
--- /dev/null
+++ b/core/src/main/resources/hudson/model/ParametersDefinitionProperty/index.properties
@@ -0,0 +1 @@
+description=This build requires parameters:
diff --git a/core/src/main/resources/hudson/model/StringParameterDefinition/config.jelly b/core/src/main/resources/hudson/model/StringParameterDefinition/config.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..35d06e881697bb80c85a06699ee07728fa5d204b
--- /dev/null
+++ b/core/src/main/resources/hudson/model/StringParameterDefinition/config.jelly
@@ -0,0 +1,13 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form"
+	xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project">
+	<f:entry title="Name">
+		<f:textbox name="parameter.name" value="${instance.name}" />
+	</f:entry>
+	<f:entry title="Default Value">
+		<f:textbox name="parameter.defaultValue" value="${instance.defaultValue}" />
+	</f:entry>
+	<f:entry title="Optional">
+		<f:checkbox name="parameter.optional" value="${instance.optional}" />
+	</f:entry>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/model/StringParameterDefinition/index.jelly b/core/src/main/resources/hudson/model/StringParameterDefinition/index.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..65bba58487f7e7c55e501208a368bc2da35b1f50
--- /dev/null
+++ b/core/src/main/resources/hudson/model/StringParameterDefinition/index.jelly
@@ -0,0 +1,10 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form"
+	xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project">
+	<f:entry title="${it.name}">
+		<div name="parameter">
+			<input type="hidden" name="name" value="${it.name}" />
+			<f:textbox name="value" value="${it.defaultValue}" />
+		</div>
+	</f:entry>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/model/StringParameterValue/value.jelly b/core/src/main/resources/hudson/model/StringParameterValue/value.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..30c526a01ec3ca41198b0ea1a93c6b070960dc7f
--- /dev/null
+++ b/core/src/main/resources/hudson/model/StringParameterValue/value.jelly
@@ -0,0 +1,7 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form"
+	xmlns:i="jelly:fmt" xmlns:p="/lib/hudson/project">
+	<f:entry title="${it.name}">
+		<f:textbox name="value" value="${it.value}" readonly="true" />
+	</f:entry>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/security/AuthorizationMatrixProperty/config.jelly b/core/src/main/resources/hudson/security/AuthorizationMatrixProperty/config.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..9408be98e31aac98a0b1106f03616b0152836d96
--- /dev/null
+++ b/core/src/main/resources/hudson/security/AuthorizationMatrixProperty/config.jelly
@@ -0,0 +1,121 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define"
+	xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
+	<f:optionalBlock xmlns:local="local" name="useProjectSecurity"
+		title="${%Enable project-based security}" checked="${instance.isUseProjectSecurity()}">
+		<f:block>
+			<j:set var="groups" value="${descriptor.allGroups}" />
+			<d:taglib uri="local">
+      <!-- generate one row for the sid name @sid -->
+				<d:tag name="row">
+					<td class="left-most">${title}</td>
+					<j:forEach var="g" items="${groups}">
+						<j:forEach var="p" items="${g.permissions}">
+							<td width="*">
+								<f:checkbox name="[${p.id}]"
+									checked="${instance.hasPermission(attrs.sid,p)}" />
+							</td>
+						</j:forEach>
+					</j:forEach>
+					<td class="stop">
+						<j:if test="${attrs.sid!='anonymous'}">
+							<a href="#">
+								<img alt="remove" src="${imagesURL}/16x16/stop.gif" />
+							</a>
+						</j:if>
+					</td>
+				</d:tag>
+			</d:taglib>
+			<link rel="stylesheet" href="${h.getViewResource(descriptor,'table.css')}"
+				type="text/css" />
+			<table id="global-matrix-authorization-strategy-table" class="center-align"
+				name="data" width="100%">
+
+      <!-- The first row will show grouping -->
+				<tr class="group-row">
+					<td rowspan="2" class="pane-header blank"> ${%User/group}
+        </td>
+        <j:forEach var="g" items="${groups}">
+          <td class="pane-header" colspan="${g.size()}">
+            ${g.title}
+          </td>
+        </j:forEach>
+        <td rowspan="2" class="stop" />
+      </tr>
+      <!-- The second row for individual permission -->
+      <tr class="caption-row">
+        <j:forEach var="g" items="${groups}">
+          <j:forEach var="p" items="${g.permissions}">
+            <th class="pane">
+              ${p.name}
+            </th>
+          </j:forEach>
+        </j:forEach>
+      </tr>
+
+      <j:forEach var="sid" items="${instance.allSIDs}">
+        <tr name="[${sid}]">
+          <local:row title="${sid}" sid="${sid}"/>
+        </tr>
+      </j:forEach>
+      <tr name="anonymous">
+        <local:row sid="anonymous" title="${%Anonymous}" />
+      </tr>
+
+
+      <!-- template row to be used for adding a new row -->
+      <j:set var="id" value="${h.generateId()}"/>
+      <tr id="${id}" style="display:none">
+        <local:row sid="${null}" />
+      </tr>
+    </table>
+    <div style="margin-top:0.5em; margin-left: 2em;">
+      ${%User/group to add}:
+      <input type="text" id="${id}text" />
+      <input type="button" value="${%Add}" id="${id}button"/>
+    </div>
+    </f:block>
+    </f:optionalBlock>
+    <script>
+      (function() {
+        <!-- place master outside the DOM tree so that it won't creep into the submitted form -->
+        var master = document.getElementById('${id}');
+        var table = master.parentNode;
+        table.removeChild(master);
+      
+        makeButton("${id}button", function (e) {
+          <!-- when 'add' is clicked... -->
+          var name = $$('${id}text').value;
+          if(name=="") {
+            alert("Please enter an user name or a group name");
+            return;
+          }
+          if(findElementsBySelector(table,"TR").find(function(n){return n.getAttribute("name")==name;})!=null) {
+            alert("Entry for '"+name+"' already exists");
+            return;
+          }
+
+          if(document.importNode!=null)
+            copy = document.importNode(master,true);
+          else
+            copy = master.cloneNode(true); <!-- for IE -->
+          copy.removeAttribute("id");
+          copy.removeAttribute("style");
+          copy.firstChild.innerHTML = name;
+          copy.setAttribute("name",'['+name+']');
+          table.appendChild(copy);
+          Behaviour.applySubtree(findAncestor(table,"TABLE"));
+        });
+      })();
+
+      Behaviour.register({
+        "#global-matrix-authorization-strategy-table TD.stop A" : function(e) {
+          e.onclick = function() {
+            var tr = findAncestor(this,"TR");
+            tr.parentNode.removeChild(tr);
+            return false;
+          }
+          e = null; <!-- avoid memory leak -->
+        }
+      });
+    </script>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/security/AuthorizationMatrixProperty/table.css b/core/src/main/resources/hudson/security/AuthorizationMatrixProperty/table.css
new file mode 100644
index 0000000000000000000000000000000000000000..4c9c0edd25112d090e93001bbaf21a88f25c09a4
--- /dev/null
+++ b/core/src/main/resources/hudson/security/AuthorizationMatrixProperty/table.css
@@ -0,0 +1,33 @@
+#global-matrix-authorization-strategy-table {
+  border-collapse: collapse;
+  border-spacing: 0;
+  border: 1px solid #D3D7CF;
+}
+
+#global-matrix-authorization-strategy-table TH {
+  padding: 0.2em;
+}
+
+#global-matrix-authorization-strategy-table TD.blank {
+  vertical-align: middle;
+  padding: 0.2em;
+}
+
+#global-matrix-authorization-strategy-table .caption-row TH {
+  font-weight: bold;
+}
+
+#global-matrix-authorization-strategy-table TD {
+  border: 1px solid #D3D7CF;
+}
+
+#global-matrix-authorization-strategy-table TD.left-most {
+  text-align: left;
+  border-left: none;
+}
+
+#global-matrix-authorization-strategy-table TD.stop {
+  border-top: 1px solid white;
+  border-right: 1px solid white;
+  border-bottom: 1px solid white;
+}
diff --git a/core/src/main/resources/hudson/security/ProjectMatrixAuthorizationStrategy/config.jelly b/core/src/main/resources/hudson/security/ProjectMatrixAuthorizationStrategy/config.jelly
new file mode 100644
index 0000000000000000000000000000000000000000..0170d708d8fdbb2ff505eb999d1ed35ba4e54714
--- /dev/null
+++ b/core/src/main/resources/hudson/security/ProjectMatrixAuthorizationStrategy/config.jelly
@@ -0,0 +1,115 @@
+<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
+	<f:block xmlns:local="local">
+    <j:set var="groups" value="${descriptor.allGroups}"/>
+    <d:taglib uri="local">
+      <!-- generate one row for the sid name @sid -->
+      <d:tag name="row">
+        <td class="left-most">${title}</td>
+        <j:forEach var="g" items="${groups}">
+          <j:forEach var="p" items="${g.permissions}">
+            <td width="*">
+              <f:checkbox name="[${p.id}]" checked="${instance.hasPermission(attrs.sid,p)}"/>
+            </td>
+          </j:forEach>
+        </j:forEach>
+        <td class="stop">
+          <j:if test="${attrs.sid!='anonymous'}">
+            <a href="#">
+              <img alt="remove" src="${imagesURL}/16x16/stop.gif"/>
+            </a>
+          </j:if>
+        </td>
+      </d:tag>
+    </d:taglib>
+    <link rel="stylesheet" href="${h.getViewResource(descriptor,'table.css')}" type="text/css" />
+    <table id="global-matrix-authorization-strategy-table" class="center-align" name="data" width="100%">
+
+      <!-- The first row will show grouping -->
+      <tr class="group-row">
+        <td rowspan="2" class="pane-header blank">
+          ${%User/group}
+        </td>
+        <j:forEach var="g" items="${groups}">
+          <td class="pane-header" colspan="${g.size()}">
+            ${g.title}
+          </td>
+        </j:forEach>
+        <td rowspan="2" class="stop" />
+      </tr>
+      <!-- The second row for individual permission -->
+      <tr class="caption-row">
+        <j:forEach var="g" items="${groups}">
+          <j:forEach var="p" items="${g.permissions}">
+            <th class="pane">
+              ${p.name}
+            </th>
+          </j:forEach>
+        </j:forEach>
+      </tr>
+
+      <j:forEach var="sid" items="${instance.allSIDs}">
+        <tr name="[${sid}]">
+          <local:row title="${sid}" sid="${sid}"/>
+        </tr>
+      </j:forEach>
+      <tr name="anonymous">
+        <local:row sid="anonymous" title="${%Anonymous}" />
+      </tr>
+
+
+      <!-- template row to be used for adding a new row -->
+      <j:set var="id" value="${h.generateId()}"/>
+      <tr id="${id}" style="display:none">
+        <local:row sid="${null}" />
+      </tr>
+    </table>
+    <div style="margin-top:0.5em; margin-left: 2em;">
+      ${%User/group to add}:
+      <input type="text" id="${id}text" />
+      <input type="button" value="${%Add}" id="${id}button"/>
+    </div>
+    <script>
+      (function() {
+        <!-- place master outside the DOM tree so that it won't creep into the submitted form -->
+        var master = document.getElementById('${id}');
+        var table = master.parentNode;
+        table.removeChild(master);
+      
+        makeButton("${id}button", function (e) {
+          <!-- when 'add' is clicked... -->
+          var name = $$('${id}text').value;
+          if(name=="") {
+            alert("Please enter an user name or a group name");
+            return;
+          }
+          if(findElementsBySelector(table,"TR").find(function(n){return n.getAttribute("name")==name;})!=null) {
+            alert("Entry for '"+name+"' already exists");
+            return;
+          }
+
+          if(document.importNode!=null)
+            copy = document.importNode(master,true);
+          else
+            copy = master.cloneNode(true); <!-- for IE -->
+          copy.removeAttribute("id");
+          copy.removeAttribute("style");
+          copy.firstChild.innerHTML = name;
+          copy.setAttribute("name",'['+name+']');
+          table.appendChild(copy);
+          Behaviour.applySubtree(findAncestor(table,"TABLE"));
+        });
+      })();
+
+      Behaviour.register({
+        "#global-matrix-authorization-strategy-table TD.stop A" : function(e) {
+          e.onclick = function() {
+            var tr = findAncestor(this,"TR");
+            tr.parentNode.removeChild(tr);
+            return false;
+          }
+          e = null; <!-- avoid memory leak -->
+        }
+      });
+    </script>
+  </f:block>
+</j:jelly>
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/security/ProjectMatrixAuthorizationStrategy/table.css b/core/src/main/resources/hudson/security/ProjectMatrixAuthorizationStrategy/table.css
new file mode 100644
index 0000000000000000000000000000000000000000..4c9c0edd25112d090e93001bbaf21a88f25c09a4
--- /dev/null
+++ b/core/src/main/resources/hudson/security/ProjectMatrixAuthorizationStrategy/table.css
@@ -0,0 +1,33 @@
+#global-matrix-authorization-strategy-table {
+  border-collapse: collapse;
+  border-spacing: 0;
+  border: 1px solid #D3D7CF;
+}
+
+#global-matrix-authorization-strategy-table TH {
+  padding: 0.2em;
+}
+
+#global-matrix-authorization-strategy-table TD.blank {
+  vertical-align: middle;
+  padding: 0.2em;
+}
+
+#global-matrix-authorization-strategy-table .caption-row TH {
+  font-weight: bold;
+}
+
+#global-matrix-authorization-strategy-table TD {
+  border: 1px solid #D3D7CF;
+}
+
+#global-matrix-authorization-strategy-table TD.left-most {
+  text-align: left;
+  border-left: none;
+}
+
+#global-matrix-authorization-strategy-table TD.stop {
+  border-top: 1px solid white;
+  border-right: 1px solid white;
+  border-bottom: 1px solid white;
+}
diff --git a/war/resources/help/project-config/parameterized-build.html b/war/resources/help/project-config/parameterized-build.html
new file mode 100644
index 0000000000000000000000000000000000000000..1db569992558933221e695def679c3c1203eb731
--- /dev/null
+++ b/war/resources/help/project-config/parameterized-build.html
@@ -0,0 +1,14 @@
+<div>
+    When you are using Hudson for various automations, it's sometimes convenient
+    to be able to "parameterize" a build, by requiring a set of user inputs to
+    be made available to the build process. For example, you might be setting up
+    an on-demand test job, where the user can submit a zip file of the binaries to be tested.
+
+    <p>
+    This section configures what parameters your build takes. Parameters are distinguished
+    by their names, and so you can have multiple parameters provided that they have different names.
+
+    <p>
+    See <a  href="http://hudson.gotdns.com/wiki/display/HUDSON/Parameterized+Build">the Wiki topic</a>
+    for more discussions about this feature.
+</div>
\ No newline at end of file
diff --git a/war/resources/images/24x24/document-properties.gif b/war/resources/images/24x24/document-properties.gif
new file mode 100644
index 0000000000000000000000000000000000000000..3ea89af61d8d0177eced906ccfd467d2b5f4e96b
Binary files /dev/null and b/war/resources/images/24x24/document-properties.gif differ