Ant之条件判断

使用ant的if unless实现

			<property name="destfilename" value="文件路径"/>
			
			<target name="detect.file"   >   
  			<condition property="fileIsExists"   >   
  				<and>   
   			<available file="${destfilename}"/> 
  			</and>   
  			</condition> 
			</target>
			
			<target name="savetosvn" if="fileIsExists">
				<echo>savetosvn executing</echo>
			  <antcall target="svncommit"/> 
			</target>
			<target name="savetosvnnofile" unless="fileIsExists" depends="detect.file,savetosvn">
				<echo>savetosvnnofile executing</echo>
			  <antcall target="svncommitwithadd"/> 
			</target>