Ant:将文件集与javac任务一起使用 [英] Ant: Using a fileset with the javac task

问题描述

我想使用FileSet来确切指示我要使用Javac任务编译的文件.我不要任何隐式行为.但是，我对此的尝试失败了.这是到目前为止我得到的:

I want to use a FileSet to indicate exactly which files I want compiled with the Javac task. I don't want any implicit behavior. My attempts at this have failed however. Here's what I've got so far:

包含我所有源文件的FileSet.

A FileSet that contains all my source files.

<fileset id="srcfiles" dir="${srcdir}">
    <include name="**/*.java"/>
</fileset>

还有一个尝试将其传递给javac的目标.

And a target that tries to pass it to javac.

<target name="build">
    <javac srcdir=".">
        <fileset refid="srcfiles"/>
    </javac>
</target>

这给了我这个错误:javac doesn't support the nested "fileset" element.

在阅读Ant文档之后，我尝试将最里面的标签从fileset更改为sourcepath.从某种意义上说，这是可行的，因为文件已编译，但仍然出错:srcfiles doesn't denote a path.我认为该源代码仅是根据隐式规则进行编译的.

After reading the Ant docs, I tried changing the inner most tag from fileset to sourcepath. This worked in the sense that the files were compiled, but it still errored out: srcfiles doesn't denote a path. I think the source was only compiled due to implicit rules.

如何才能明确告诉javac我要编译哪些文件?还是这根本不是Ant应该如何工作的?我来自C ++背景，其中识别源文件是构建过程的重要组成部分.但是，考虑到Java的文件命名和目录结构要求，隐式**/*.java模式规则可能涵盖所有用例.

How can I tell javac explicitly which individual files I want compiled? Or is this simply not how Ant is supposed to work? I come from a C++ background where identifying source files is a significant part of the build process. However, given Java's file naming and directory structure requirements, perhaps the implicit **/*.java pattern rule covers all use cases.

推荐答案

ant手册对于Javac 说:

如果您只希望编译明确指定的文件并禁用 javac的默认搜索机制，则可以取消设置sourcepath 属性:

If you wish to compile only files explicitly specified and disable javac's default searching mechanism then you can unset the sourcepath attribute:

<javac sourcepath="" srcdir="${src}"
       destdir="${build}" >
    <include name="**/*.java"/>
    <exclude name="**/Example.java"/>
</javac>

不过，我认为这不是一个好主意.在设计良好的项目中，应编译给定目录(或一组目录)中的所有文件.不应该编译的文件根本不应该存在，或者应该位于单独的目录中.

I don't think it's a good idea, though. In a well-designed project, all the files in a given directory (or in a set of directories) should be compiled. The files which shouldn't be compiled shouldn't be there at all, or should be in a separate directory.

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