Gradle integration to SVN to generate CHANGELOG from svn log (integration via svnkit)

changelog.gradle

/*

task changeLog(type: ReleaseNotes){
  destFile file("CHANGELOG-DJANGO-SAMPLE")
  url "http://django-page-cms.googlecode.com/svn/trunk/"
}

# gradle changeLog

Creates output (first entry only shown):

---------------------------------------------
revision: 1
author: null
date: Tue Nov 06 22:36:55 NZDT 2007
log message: Initial directory structure.

changed paths:
  A /trunk
  A /tags
  A /branches
---------------------------------------------

*/

buildscript {
	repositories {
    mavenCentral()
		mavenRepo url:'http://maven.tmatesoft.com/content/repositories/releases'
	}

	dependencies {
		classpath 'org.tmatesoft.svnkit:svnkit:1.3.8'
	}
}

import java.util.Collection;
import java.util.Iterator;
import java.util.Set;

import org.tmatesoft.svn.core.SVNException;
import org.tmatesoft.svn.core.SVNLogEntry;
import org.tmatesoft.svn.core.SVNLogEntryPath;
import org.tmatesoft.svn.core.SVNURL;
import org.tmatesoft.svn.core.auth.ISVNAuthenticationManager;
import org.tmatesoft.svn.core.internal.io.dav.DAVRepositoryFactory;
import org.tmatesoft.svn.core.io.SVNRepository;
import org.tmatesoft.svn.core.io.SVNRepositoryFactory;
import org.tmatesoft.svn.core.wc.SVNWCUtil;

// Trying to work around a small defficiency in plug-in class
// resolution.
project.ext.ReleaseNotes = ReleaseNotes.class

class ReleaseNotes extends DefaultTask {

    String url
    File destFile
    
    @Optional
    String username

    @Optional
    String password

    @Optional
    long startRevision

    @Optional
    long endRevision
    

    @TaskAction
    def create() {
    
        startRevision = startRevision != null ? startRevision : 0;
        endRevision =  endRevision != null ? endRevision : -1; //HEAD (the latest) revision
        
        DAVRepositoryFactory.setup();
        
        println("Getting url: ${url}")
        def repository = SVNRepositoryFactory.create(SVNURL.parseURIEncoded(url));

        def authManager = SVNWCUtil.createDefaultAuthenticationManager(username, password);
        repository.setAuthenticationManager(authManager);
        endRevision = repository.getLatestRevision();
 
        java.lang.String[] targetPaths;
        java.util.Collection entries;
        def logEntries = repository.log(targetPaths, entries, startRevision, endRevision, true, true);

        destFile.withWriter { out ->


          
          logEntries.each { logEntry ->

             out.writeLine("---------------------------------------------");
             out.writeLine("revision: " + logEntry.getRevision());
             out.writeLine("author: " + logEntry.getAuthor());

             out.writeLine("date: " + logEntry.getDate());
             out.writeLine("log message: " + logEntry.getMessage());

             if ( logEntry.getChangedPaths().size() > 0 ){

                out.writeLine("");
                out.writeLine("changed paths:");

                logEntry.getChangedPaths().each { paths -> 
                     paths.each { entryPath ->
                       out.writeLine( "  " + entryPath.getValue() )
                     }
                 }           
             }

          }
 
        }

  
    }

}