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      1 /*******************************************************************************
      2  * Copyright (c) 2005, 2006 IBM Corporation and others.
      3  * All rights reserved. This program and the accompanying materials
      4  * are made available under the terms of the Eclipse Public License v1.0
      5  * which accompanies this distribution, and is available at
      6  * http://www.eclipse.org/legal/epl-v10.html
      7  *
      8  * Contributors:
      9  *     IBM Corporation - initial API and implementation
     10  *******************************************************************************/
     11 package org.eclipse.releng.util.rss;
     12 
     13 import java.io.File;
     14 import java.io.IOException;
     15 import java.io.InputStream;
     16 import java.io.OutputStream;
     17 
     18 import org.apache.tools.ant.Project;
     19 import org.apache.tools.ant.taskdefs.ExecTask;
     20 import org.apache.tools.ant.types.Commandline.Argument;
     21 
     22 /**
     23  *
     24  *    Helper methods
     25  *
     26  * @author nickb
     27  *
     28  */
     29 public class RSSFeedUtil {
     30 
     31   private static final String SP = " "; //$NON-NLS-1$
     32   private static final String CL = ":"; //$NON-NLS-1$
     33   public static final String EXPECTED_RESULT = "0"; //$NON-NLS-1$
     34 
     35   public static final String RUN_EXEC_TASK_ERROR = "runExecTask.Error"; //$NON-NLS-1$
     36   public static final String RUN_EXEC_TASK_OUTPUT = "runExecTask.Output"; //$NON-NLS-1$
     37   public static final String RUN_EXEC_TASK_RESULT = "runExecTask.Result"; //$NON-NLS-1$
     38 
     39   private int debug = 0;
     40 
     41   /**
     42    * A buffer.
     43    */
     44   private static byte[] buffer = new byte [8192];
     45 
     46   public ExecTask runExecTask(String executable, String commandline, String dir)
     47   {
     48     if (dir==null) {
     49       dir = ".";  //$NON-NLS-1$
     50     }
     51 
     52     ExecTask exec = new ExecTask();
     53     exec.setExecutable(executable);
     54     exec.setResolveExecutable(true);
     55     exec.setDir((new File(dir)).getAbsoluteFile());
     56     Project project = new Project(); project.setName(executable);
     57     exec.setProject(project);
     58     exec.setFailIfExecutionFails(true);
     59     exec.setFailonerror(true);
     60     exec.setErrorProperty(RUN_EXEC_TASK_ERROR);
     61     exec.setOutputproperty(RUN_EXEC_TASK_OUTPUT);
     62     exec.setResultProperty(RUN_EXEC_TASK_RESULT);
     63     exec.setLogError(true);
     64 
     65     if (commandline != null || "".equals(commandline)) { //$NON-NLS-1$
     66       Argument execArg = exec.createArg();
     67       execArg.setLine(commandline);
     68     }
     69     try
     70     {
     71       if (debug>0) {
     72         System.out.println(Messages.getString("RSSFeedPublisherTask.Execute") + SP + executable + (commandline==null?"":SP + commandline)); //$NON-NLS-1$ //$NON-NLS-2$
     73       }
     74       exec.execute();
     75       handleExecTaskReturn(project);
     76     }
     77     catch (Exception e)
     78     {
     79       handleExecTaskReturn(project);
     80       System.err.println(Messages.getString("RSSFeedPublisherTask.ForProject") + SP + project.getName() + CL); //$NON-NLS-1$
     81       e.printStackTrace();
     82     }
     83 
     84     return exec;
     85 
     86   }
     87 
     88   private void handleExecTaskReturn(Project project)
     89   {
     90     String out = null;
     91 
     92     out = project.getProperty(RUN_EXEC_TASK_RESULT);
     93     if (debug>1) {
     94       if (!isNullString(out) && !EXPECTED_RESULT.equals(out)) {
     95         System.err.println(Messages.getString("RSSFeedPublisherTask.Result") + SP + out); //$NON-NLS-1$
     96       }
     97     }
     98 
     99     out = project.getProperty(RUN_EXEC_TASK_OUTPUT);
    100     if (!isNullString(out)) {
    101       System.out.println(out);
    102     }
    103 
    104     out = project.getProperty(RUN_EXEC_TASK_ERROR);
    105     if (!isNullString(out)) {
    106       if (debug>1 && out.equals(Messages.getString("RSSFeedPublisherTask.CVSWarning"))) { //$NON-NLS-1$
    107         System.out.println(out);
    108       } else if (!out.equals(Messages.getString("RSSFeedPublisherTask.CVSWarning"))) { //$NON-NLS-1$
    109         System.err.println(Messages.getString("RSSFeedPublisherTask.Error") + SP + out); //$NON-NLS-1$
    110       }
    111     }
    112   }
    113 
    114   /**
    115    * Copies all bytes in the given source stream to the given destination
    116    * stream. Neither streams are closed.
    117    *
    118    * From: org.eclipse.emf/tests/org.eclipse.emf.test.build/src/org/eclipse/emf/test/build/FileTool.java,v 1.2
    119    *
    120    * @param source
    121    *            the given source stream
    122    * @param destination
    123    *            the given destination stream
    124    */
    125   public static void transferData(InputStream source, OutputStream destination) throws IOException
    126   {
    127     int bytesRead = 0;
    128     while (bytesRead != -1)
    129     {
    130       bytesRead = source.read(buffer, 0, buffer.length);
    131       if (bytesRead != -1)
    132       {
    133         destination.write(buffer, 0, bytesRead);
    134       }
    135     }
    136   }
    137 
    138   public static boolean isNullString(String str)
    139   {
    140     return str==null||"".equals(str); //$NON-NLS-1$
    141   }
    142 
    143   public void setDebug(int debug)
    144   {
    145     this.debug = debug;
    146   }
    147 
    148 }