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/*******************************************************************************
 *
 * Copyright (c) 2004-2010, Oracle Corporation.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: 
 *
 *   
 *       
 *
 *******************************************************************************/ 

package hudson.cli;

import hudson.model.AbstractBuild;
import hudson.model.AbstractProject;
import hudson.model.Cause;
import hudson.model.ParametersAction;
import hudson.model.ParameterValue;
import hudson.model.ParametersDefinitionProperty;
import hudson.model.ParameterDefinition;
import hudson.Extension;
import hudson.AbortException;
import hudson.model.Item;
import hudson.util.EditDistance;
import org.kohsuke.args4j.Argument;
import org.kohsuke.args4j.Option;

import java.util.concurrent.Future;
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import java.util.Map.Entry;
import java.io.PrintStream;

/**
 * Builds a job, and optionally waits until its completion.
 *
 * @author Kohsuke Kawaguchi
 */
@Extension
public class BuildCommand extends CLICommand {
    @Override
    public String getShortDescription() {
        return "Builds a job, and optionally waits until its completion.";
    }

    @Argument(metaVar="JOB",usage="Name of the job to build",required=true)
    public AbstractProject job;

    @Option(name="-s",usage="Wait until the completion/abortion of the command")
    public boolean sync = false;

    @Option(name="-p",usage="Specify the build parameters in the key=value format.")
    public Map parameters = new HashMap();

    protected int run() throws Exception {
        job.checkPermission(Item.BUILD);

        ParametersAction a = null;
        if (!parameters.isEmpty()) {
            ParametersDefinitionProperty pdp = job.getProperty(ParametersDefinitionProperty.class);
            if (pdp==null)
                throw new AbortException(job.getFullDisplayName()+" is not parameterized but the -p option was specified");

            List values = new ArrayList(); 

            for (Entry e : parameters.entrySet()) {
                String name = e.getKey();
                ParameterDefinition pd = pdp.getParameterDefinition(name);
                if (pd==null)
                    throw new AbortException(String.format("\'%s\' is not a valid parameter. Did you mean %s?",
                            name, EditDistance.findNearest(name, pdp.getParameterDefinitionNames())));
                values.add(pd.createValue(this,e.getValue()));
            }
            for (ParameterDefinition pd : pdp.getParameterDefinitions()) {
                if (parameters.get(pd.getName()) == null) {
                    values.add(pd.getDefaultParameterValue());
                }
            }
            a = new ParametersAction(values);
        }

        Future f = job.scheduleBuild2(0, new CLICause(), a);
        if (!sync)  return 0;

        AbstractBuild b = f.get();    // wait for the completion
        stdout.println("Completed "+b.getFullDisplayName()+" : "+b.getResult());
        return b.getResult().ordinal;
    }

    @Override
    protected void printUsageSummary(PrintStream stderr) {
        stderr.println(
            "Starts a build, and optionally waits for a completion.\n" +
            "Aside from general scripting use, this command can be\n" +
            "used to invoke another job from within a build of one job.\n" +
            "With the -s option, this command changes the exit code based on\n" +
            "the outcome of the build (exit code 0 indicates a success.)\n"
        );
    }

    // TODO: CLI can authenticate as different users, so should record which user here..
    public static class CLICause extends Cause {
        public String getShortDescription() {
            return "Started by command line";
        }

        @Override
        public boolean equals(Object o) {
            return o instanceof CLICause;
        }

        @Override
        public int hashCode() {
            return 7;
        }
    }
}