持续集成实践 --- Luntbuild 扩展 ---- Builld Version Generated From SVN Revison

最近使用CI Server, 像hudson, cruisecontrol, luntbuild. 三者Luntbuild功能最全面, 当然crusecontrol,hudson也有丰富的plugin得到增强.

 

下载luntbuild1.6.2, 发现Luntbuild没有直接支持从版本管理工具中获取Revision来生成Build Version. Build Version可以使用OGNL来生成, 翻阅用户手册得知, 其OGNL的Root Object为Schedule, 决定改源码达到此功能.

 

学习了Ognl后并仔细阅读源码发现, com.luntsys.luntbuild.builders.Builder.Schedule具有sytem属性,指向OgnlHelper.决定改写此类.

 

为com.luntsys.luntbuild.utility.OgnlHelper添加方法

 

public String retrieveSvnHeadRevision(SvnAdaptor vcs);

 

这样Ognl  Expression可以写成:

 

${system.retrieveSvnHeadRevision(project.vcsList[0])}

 

由于一般项目只采用Single VCS, project.vcsList[0]获取第一个VCS便可.

 

 

参考 com.luntsys.luntbuild.vcs.SvnAdaptor 方法源码 getRevisionsSince(...),  便可实现自己的retrieveSvnHeadRevision

 

public Revisions getRevisionsSince(Date sinceDate, Schedule workingSchedule, Project antProject) {

    //...
}

 

 

实现过程遇到私有方法访问问题, 没发现luntbuild有生成相关的Error Log, 觉得luntbuild这点有待改进.

 

代码改写如下, 与SVN Repos Sever的交互利用了SvnKit. 详情可看http://svnkit.com/javadoc/index.html

 

try {
	svnClientManager = SVNClientManager.newInstance(
			SVNWCUtil.createDefaultOptions(true), vcs.getUser(),
			vcs.getPassword());
	SVNLogClient svnLogClient = svnClientManager.getLogClient();

	SvnModule module = (SvnModule) vcs.getModules().get(0);

	SVNURL url = (SVNURL)invokeSvnAapator(vcs, "getModuleUrl", new Class[]{SvnModule.class}, 
			new Object[]{module});
	
	final SvnRevsionHolder svnRevsionHolder = new SvnRevsionHolder();
	
	svnLogClient.doLog(url, null, SVNRevision.HEAD, SVNRevision.HEAD, SVNRevision.HEAD, 
		false, true, 1, 
		new ISVNLogEntryHandler() {
			public void handleLogEntry(SVNLogEntry svnLogEntry) throws SVNException {
				
				svnRevsionHolder.setRevision(
						String.valueOf(svnLogEntry.getRevision()));
				svnRevsionHolder.setLastCommittedDate(svnLogEntry.getDate());
			}
	});
				
	return svnRevsionHolder.toBuildVersion();			

} catch (Exception e) {
	throw new IllegalStateException("failed to retrieve svn revison", e);
} finally {
	if (svnClientManager != null) {
		svnClientManager.dispose();
	}
}

  

调用私有方法getModuleUrl(...)获取path

 

protected Object invokeSvnAapator(SvnAdaptor vcs, String methodName, Class[] methodParams, Object[] args) {
	Method method = null;
	try {
		method =
			SvnAdaptor.class.getDeclaredMethod(methodName, methodParams);
		
		method.setAccessible(true);
		
		return method.invoke(vcs, args);
		
	} catch (Exception e) {
		throw new IllegalStateException("Failed to invoke method ["
				+ methodName + "] on SvnAdaptor", e);
	}
}

 

  SvnKit的API采用回调实现处理,另外定义了内部类来存储返回信息

 

private static class SvnRevsionHolder {
	
	private String revision;
	
	private Date lastCommittedDate;

	public void setLastCommittedDate(Date lastCommittedDate) {
		this.lastCommittedDate = lastCommittedDate;
	}

	public void setRevision(String revision) {
		this.revision = revision;
	}
	
	public String toBuildVersion() {
		
		return new StringBuffer()
			.append(revision)
			.append("-")
			.append(
				new SimpleDateFormat("yyyyMMddHHmm").format(lastCommittedDate)
			)
			.toString();
	}
}

 

编译之后把原有的class文件替换后,重启Server便大功告成.