1 /*

     2  * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of the License "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Nokia Corporation - initial contribution.

    11  *

    12  * Contributors:

    13  *

    14  * Description:  

    15  *

    16  */

    17 package com.nokia.maven.scm.provider.hg;

    18 

    19 import java.io.File;

    20 

    21 import org.apache.maven.scm.ScmException;

    22 import org.apache.maven.scm.ScmFileStatus;

    23 import org.apache.maven.scm.log.ScmLogger;

    24 import org.apache.maven.scm.provider.hg.HgUtils;

    25 import org.apache.maven.scm.provider.hg.command.HgCommandConstants;

    26 import org.apache.maven.scm.provider.hg.command.HgConsumer;

    27 

    28 /**

    29  * Custom version of the HgUtils helper

    30  * class.

    31  * It currently implement a fix function

    32  * to get the current revision 

    33  * number.

    34  *

    35  */

    36 public final class HgUtilsInternal {

    37     

    38     private HgUtilsInternal() {

    39     }

    40 

    41     public static long getCurrentRevisionNumber(ScmLogger logger, File workingDir)

    42         throws ScmException {

    43 

    44         String[] revCmd = new String[] { HgCommandConstants.REVNO_CMD };

    45         HgRevNoConsumer consumer = new HgRevNoConsumer(logger);

    46         HgUtils.execute(consumer, logger, workingDir, revCmd);

    47 

    48         return consumer.getCurrentRevisionNumber();

    49     }

    50 

    51     /**

    52      * Get current (working) revision.

    53      * <p/>

    54      * Resolve revision to the last integer found in the command output.

    55      */

    56     private static class HgRevNoConsumer extends HgConsumer {

    57 

    58         private long revNo;

    59 

    60         HgRevNoConsumer(ScmLogger logger) {

    61             super(logger);

    62         }

    63 

    64         /**

    65          * {@inheritDoc}

    66          * Parse the output of the ID command

    67          * line will be split by space and first parameter

    68          */

    69         @Override

    70         public void doConsume(ScmFileStatus status, String line) {

    71             String[] elements = line.split("\\s+");

    72             if (elements.length > 0) {

    73                 // If the clone is modified then the id contains the character '+'

    74                 String strId = elements[0].trim().replace("+", "");

    75                 if (this.getLogger().isDebugEnabled()) {

    76                     this.getLogger().debug("Parsing: " + strId);

    77                 }

    78                 try {

    79                     revNo = Long.parseLong(strId, 16);

    80                 } catch (NumberFormatException e) {

    81                     this.getLogger().error(e);

    82                 }

    83             }

    84         }

    85 

    86         long getCurrentRevisionNumber() {

    87             return revNo;

    88         }

    89     }

    90 

    91 }