使用 Ant 构建其他依赖项目 [英] Building other, dependent projects with Ant

问题描述

让我先说我是 Ant 的新手.比如，为了完成这个任务，我两天前才开始学习它.

Let me preface by saying that I am new to Ant. As in, I just started learning it 2 days ago in order to accomplish this task.

我想要做的是创建一个主"蚂蚁脚本，它调用其他几个蚂蚁脚本.例如:

What I'm trying to do is create a "master" ant script that calls several other ant scripts. For example:

Project A
 - contains build.xml, target "makeProjectAjar"
 - output: A.jar

Project B
 - contains build.xml, target "makeProjectBjar"
 - output: B.jar

Project C
 - contains build.xml, target "makeProjectCjar"
 - output: C.jar

Project D
 - contains build.xml, target "finalPackage"
 - Must first build Project A, Project B, Project C
 - Copy A.jar, B.jar, C.jar to Project D
 - Package all of this into D.jar

现在我有 A、B 和 C 的所有单独构建.我的意思是我可以从这些文件夹中的任何一个运行ant"，它会构建项目并生成一个 jar 文件.如果我以这种方式构建 A、B 和 C，我有 3 个 jar 文件.然后我可以将它们复制到 D 并将其打包到最终的 jar 中.效果很好.

Right now I have all of the individual builds for A, B, and C working. By this, I mean I can run 'ant' from any of these folders and it will build the project and produce a jar file. If I build A, B, and C this way, I have 3 jar files. I can then copy them into D and package it into the final jar. That works fine.

但我想要的是能够从项目 D 的 build.xml 中触发 A、B 和 C 构建.我试过这个:

But what I'd like is to be able to trigger the A, B, and C builds from within build.xml of Project D. I've tried this:

<?xml version="1.0" encoding="UTF-8"?>

<project name="CommonJava" default="makeCommonJavaJar" basedir=".">

    <import file="../Common/build.xml"/>
    <import file="../CommonAndroid/build.xml"/>

    <target name="makeCommonJavaJar" description="Create a jar for the CommonJava project"
        depends="clean">
        <mkdir dir="build" />
        <jar jarfile="./build/commonjava.jar" includes="*.class" />
    </target>

    <target name="clean">
        <delete dir="build" />
    </target>

    <target name="build+package" description="Build all prerequisites and package them">
        <antcall target="makeCommonJar"/>
        <antcall target="makeAndroidJar"/>
    </target>
</project>

makeCommonJar 是 Common/build.xml(项目 A)中的目标，makeAndroidJar 是 ../CommonAndroid/build.xml(项目 B)中的目标.但是，似乎在使用 时，它从调用文件夹的上下文中运行.这意味着项目 B 引用的资源不可用，因为它是从项目 D 运行的.这有意义吗?

makeCommonJar is a target in Common/build.xml (Project A) and makeAndroidJar is a target in ../CommonAndroid/build.xml (Project B). However, it seems that when using <import>, it runs from the context of the calling folder. Meaning resources referenced by Project B are unavailable since it's running from Project D. Does that make sense?

长问题短...使用Ant，我如何在其他项目中调用build.xml 文件以便首先构建这些项目?

Long question short... using Ant, how can I call build.xml files in other projects in order to build those projects first?

推荐答案

以下是一些通用指南(不是规则，Ant 非常自由):

Here are some general guidelines (not rules, Ant is quite liberal):

• build.xml 通常设计为在特定项目上运行，因此不会在其他构建中导入"
• import 任务通常用于共享一些构建机制，而不是像您正在做的构建工作流.例如构建 jar 的目标，由目标目录等一些属性参数化.
• subant 和 ant 任务优先用于触发其他项目的构建

• a build.xml is generally designed to be run on a specific project, so it is not 'imported' in other builds
• the import task is generally used to share some comme piece of build mechanic, not a piece of build workflow like you are doing. For instance a target to build jar, parameterized by some properties like the target directory.
• the subant and ant tasks are preferred used to trigger builds of other project

这里是项目 D 的 build.xml:

So here is what would look like a build.xml for project D:

<project name="CommonJava" default="makeCommonJavaJar" basedir=".">

    <target name="build-deps">
        <ant antfile="../Common/build.xml" target="makeCommonJar"/>
        <ant antfile="../CommonAndroid/build.xml" target="makeAndroidJar"/>
    </target>

    <target name="makeCommonJavaJar" depends="build-deps">
        <mkdir dir="build" />
        <jar jarfile="./build/commonjava.jar" includes="*.class" />
    </target>

</project>

参见http://ant.apache.org/manual/Tasks/ant.html

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