AntCall和Ant任务之间有什么区别？

Question

除了Ant任务在不同的构建文件上运行之外,AntCall任务(此处描述)和Ant任务(此处描述)之间是否存在实质性差异？

Answer 1

这实际上取决于你所谓的"实质性差异".区别在于一个人调用另一个,所以基本上是相同的东西,但在不同的上下文中使用.

以下是一个片段,defaults.properties用于定义标准Ant任务:

ant=org.apache.tools.ant.taskdefs.Ant
antcall=org.apache.tools.ant.taskdefs.CallTarget
...........

如果打开这些任务的源代码,您将看到CallTarget包含一个Ant对象并将大部分工作委托给它:

public class CallTarget extends Task {
    private Ant callee;
    ...........
    ...........
    /**
     * Delegate the work to the ant task instance, after setting it up.
     * @throws BuildException on validation failure or if the target didn't
     * execute.
     */
    public void execute() throws BuildException {
        if (callee == null) {
            init();
        }
        if (!targetSet) {
            throw new BuildException(
                "Attribute target or at least one nested target is required.",
                 getLocation());
        }
        callee.setAntfile(getProject().getProperty("ant.file"));
        callee.setInheritAll(inheritAll);
        callee.setInheritRefs(inheritRefs);
        callee.execute();
    }
    ..........
    ..........
}