Question

我有一个像这样的蚂蚁文件：

<project name="test" basedir="." default="build">
    <taskdef resource="net/sf/antcontrib/antcontrib.properties">
        <classpath>
            <pathelement location="/data/build/scripts/ant-contrib-0.6.jar" />
        </classpath>
    </taskdef>

    <property name="target" value="/tmp/target.file" />

    <target name="build" depends="checkDone,fullBuild,noBuild" >
        <echo message="Build process completed for ${target}"/>
    </target>

    <target name="checkDone" >
        <available file="${target}" property="done"/>
    </target>

    <target name="noBuild" if="done" >
        <echo message="Build process skipped, ${target} already done" />
    </target>

    <target name="fullBuild" depends="step1,step2" unless="done" >
        <echo message="Build process executed for ${target}" />
    </target>

    <target name="step1" >
        <echo message="Executing step1" />
    </target>

    <target name="step2" >
        <echo message="Executing step2" />
    </target>

</project>

TL; DR：如果文件在那里，我想执行“noBuild”，如果不是，我想执行由step1和step2组成的“fullBuild”。

问题是：如果文件已经存在，则跳过“fullBuild”，但step1和step2不是......：这是日志：

Apache Ant version 1.6.5 compiled on June 2 2005
Buildfile: /data/build/scripts/test.ant
Detected Java version: 1.5 in: /soft/ibm/WebSphere/ProcServer/java/jre
Detected OS: Linux
parsing buildfile /data/build/scripts/test.ant with URI = file:///data/build/scripts/test.ant
Project base dir set to: /data/build/scripts
Build sequence for target(s) `build' is [checkDone, step1, step2, fullBuild, noBuild, build]
Complete build sequence is [checkDone, step1, step2, fullBuild, noBuild, build, ]

checkDone:
[available] Found: /tmp/target.file

step1:
    [echo] Executing step1

step2:
    [echo] Executing step2

fullBuild:
Skipped because property 'done' set.

noBuild:
    [echo] Build process skipped, /tmp/target.file already done

build:
    [echo] Build process completed for /tmp/target.file

BUILD SUCCESSFUL

那么，我错过了什么？或者我应该在所有目标中真正拥有“除非”条款吗？

Answer 1

这是一个常见的蚂蚁问题。来自目标的if / unless属性不适用于依赖链因此，请参阅ant manual：

重要说明：if和unless属性仅启用或禁用它们所附着的目标。他们不控制是否目标条件目标依赖于执行。事实上，他们甚至没有得到评估，直到目标即将到来已执行，其所有前任已经执行。

所以你必须使用除属性也用于stepX目标：

<target name="step1" unless="done">
<target name="step2" unless="done">

跳过由于“除非”而跳过的目标的依赖关系

1 个答案: