ant - 运行 Ant exec 任务，没有 "Result:"输出

Question

当 Ant exec 任务运行以非零退出状态完成的命令时，exec 任务会输出状态，例如:

 [exec] Result: 1

这是在没有上下文的情况下打印的，因此会让用户感到困惑。 即使使用 outputproperty="someproperty"failureonerror="false" 调用 exec 任务，也会打印该信息。 我对 grep 等命令使用这样的调用，其中非零输出可能是所需的预期结果。

有没有办法抑制“Result:”输出，而不对 Ant 进程的输出进行任何其他更改？

Answer 1

看一下下面的示例，它使用 JavaScript 来禁用和恢复日志记录。

build.xml

<project name="ant-exec-intentional-fail" default="run">
    <target name="run">
        <echo>Show that exec logs "Result: 1" by default...</echo>
        <exec executable="sh" failonerror="false">
            <arg value="-c"/>
            <arg value="exit 1"/>
        </exec>
        <echo>Disabling logging...</echo>
        <script language="javascript"><![CDATA[
            var savedLoggers = project.getBuildListeners();
            for( var i = 0; i < savedLoggers.length; i++ ) {
                var logger = savedLoggers[i];
                project.removeBuildListener( logger );
            }
            project.addReference( "savedLoggers", savedLoggers );
        ]]></script>
        <exec executable="sh" failonerror="false" resultproperty="middle-sh-result">
            <arg value="-c"/>
            <arg value="exit 42"/>
        </exec>
        <!-- Restore logging. -->
        <script language="javascript"><![CDATA[
            var savedLoggers = project.getReference( "savedLoggers" );
            for( var i = 0; i < savedLoggers.length; i++ ) {
                var logger = savedLoggers[i];
                project.addBuildListener( logger );
            }
        ]]></script>
        <echo>Verify logging works again...</echo>
        <exec executable="sh" failonerror="false">
            <arg value="-c"/>
            <arg value="exit 1"/>
        </exec>
        <echo>By the way, the middle exec returned: ${middle-sh-result}</echo>
    </target>
</project>

输出

run:
 [echo] Show that exec logs "Result: 1" by default...
 [exec] Result: 1
 [echo] Disabling logging...
 [echo] Verify logging works again...
 [exec] Result: 1
 [echo] By the way, the middle exec returned: 42