nodejs/org.eclipse.wst.jsdt.js.node/src/org/eclipse/wst/jsdt/js/node/runtime/NodeJsRunner.java

/*******************************************************************************
 * Copyright (c) 2016 IBM Corporation. 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * 	Contributors:
 * 	    IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.jsdt.js.node.runtime;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.model.IProcess;
import org.eclipse.wst.jsdt.core.runtime.IJSRunner;
import org.eclipse.wst.jsdt.core.runtime.IJSRuntimeInstall;
import org.eclipse.wst.jsdt.core.runtime.JSRunnerConfiguration;
import org.eclipse.wst.jsdt.js.node.NodePlugin;
import org.eclipse.wst.jsdt.js.node.internal.Messages;
import org.eclipse.wst.jsdt.js.node.internal.NodeConstants;
import org.eclipse.wst.jsdt.js.node.internal.util.LaunchConfigurationUtil;

/**
 * @author "Adalberto Lopez Venegas (adalbert)"
 */
public class NodeJsRunner implements IJSRunner {
	private IJSRuntimeInstall jsRuntimeInstall;
	
	public NodeJsRunner(IJSRuntimeInstall jsRuntimeInstall) {
		this.jsRuntimeInstall = jsRuntimeInstall;
	}

	public IProcess run(JSRunnerConfiguration configuration, ILaunch launch, IProgressMonitor monitor) throws CoreException {
		List<String> cmdLine = new ArrayList<String>();
		cmdLine.add(jsRuntimeInstall.getInstallLocation().getPath());

		String [] nodeRuntimeArguments = combineRuntimeArgs(configuration, jsRuntimeInstall);
		if (nodeRuntimeArguments.length != 0) {
			for (String argument : nodeRuntimeArguments) {
				cmdLine.add(argument);
			}
		}

		String mainFile = configuration.getFileToLaunch();
		cmdLine.add(mainFile);

		String [] appArguments = configuration.getProgramArguments();
		if (appArguments.length != 0) {
			for (String argument : appArguments) {
				cmdLine.add(argument);
			}
		}

		File workingPath = null;
		String workingDirectory = configuration.getWorkingDirectory();
		if (workingDirectory.length() > 0){
			workingPath = new File(workingDirectory);
		}

		String[] cmds = {};
		cmds = cmdLine.toArray(cmds);
		
		ProcessBuilder builder = new ProcessBuilder(cmds);
		builder.directory(workingPath);
		try {
			Process process = builder.start();
			builder.redirectErrorStream(true);
			launch.setAttribute(NodeConstants.CONSOLE_ENCODING, NodeConstants.CHARSET_UTF_8);
			return DebugPlugin.newProcess(launch, process, "Node.js process", LaunchConfigurationUtil.getDefaultAttributes()); //$NON-NLS-1$
		} catch (Exception ex) {
			throw new CoreException(new Status (IStatus.ERROR, NodePlugin.PLUGIN_ID, 
					Messages.LAUNCH_CONFIGURATION_FAILED_EXECUTION_ERROR, ex));
		}
	}
	
	protected String[] combineRuntimeArgs(JSRunnerConfiguration configuration, IJSRuntimeInstall jsRuntimeInstall2) {
		String[] launchVMArgs= configuration.getJSRuntimeArguments();
		String[] vmVMArgs = jsRuntimeInstall2.getJSRuntimeArguments();
		if (vmVMArgs == null || vmVMArgs.length == 0) {
			return launchVMArgs;
		}
		
		String[] allVMArgs = new String[launchVMArgs.length + vmVMArgs.length];
		System.arraycopy(vmVMArgs, 0, allVMArgs, 0, vmVMArgs.length);
		System.arraycopy(launchVMArgs, 0, allVMArgs, vmVMArgs.length, launchVMArgs.length);
		return allVMArgs;
	}
}