android - 通过主 ANT 构建文件构建多个 android 项目

Question

我有一个主构建文件，用于构建一系列 Android 项目。这些 Android 项目中的每一个都引用相同的 Android 库项目(我将其称为 CoreLibrary)。以下是我的子任务。

 <target name="build" description="Builds (only) all applications">
    <subant>
        <target name="debug" />
        <fileset refid="all-applications" />
    </subant>
</target>

问题:我可以做些什么来防止为我的子任务的所有应用程序文件集中的每个 Android 项目重新构建 CoreLibrary？这会显着加快我的构建时间，所以我希望我能做点什么。

Answer 1

其实我最近才想出办法解决这个问题。基本思想是，我的 ANT 文件找到所有库项目，首先构建它们，然后使用 nodeps 目标构建我的项目的其余部分。这有效地防止了 CoreLibrary 不断被重新编译的情况。

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

 <!-- A property for the name of the file that contains 'android.library=true' (which is how we find library projects) -->
<property name="library.setting.file.name" value="project.properties" />

<filelist id="normal-projects" dir=".">
    <!-- You want to add your own projects here -->
    <file name="./MyProject/build.xml" />
    <file name="./MyProject2/build.xml" />
    <file name="./MyProject3/build.xml" />
</filelist>

<fileset id="all-libraries-properties" dir=".">
    <include name="*/${library.setting.file.name}" />
    <contains casesensitive="true" text="android.library=true" />
</fileset>

<pathconvert property="all-libraries" refid="all-libraries-properties">
    <globmapper from="*${library.setting.file.name}" to="*build.xml" />
</pathconvert>    

<target name="-set-debug-mode">
    <property name="build.target" value="debug" />
    <property name="install.target" value="installd" />
</target>

<target name="-set-release-mode">
    <property name="build.target" value="release" />
    <property name="install.target" value="installr" />
</target>

<target name="-build-dependencies" unless="built.dependencies">
    <property name="built.dependencies" value="true" />
    <subant buildpath="${all-libraries}" target="${build.target}" inheritall="false" />
</target>

<target name="-build-normal-projects" depends="-build-dependencies">
    <subant inheritall="false">
        <target name="nodeps" />
        <target name="${build.target}" />
        <resources refid="normal-projects" />
    </subant>
</target>

<target name="-install-normal-projects">
    <subant inheritall="false">
        <target name="${install.target}" />
        <resources refid="normal-projects" />
    </subant>
</target>

<target name="debug" depends="-set-debug-mode, -build-normal-projects" description="Builds (only) a debug-key signed application" />
<target name="release" depends="-set-release-mode, -build-normal-projects" description="Builds (only) a release-key signed application" />

<target name="installd" depends="-set-debug-mode, -install-normal-projects" description="Installs (only) a debug-key signed application" />
<target name="installr" depends="-set-release-mode, -install-normal-projects" description="Installs (only) a release-key signed application" />

</project>

注意 如果我编写了一个实际找到库依赖顺序的任务，那么我可以使用 nodeps 目标构建库，那么这个解决方案可能会得到改进。此外，可能有一种方法可以自动检测“正常项目”，但我还不需要。最后，我从我的普通 ANT 文件中展开了很多东西，把它带到这里，希望我没有遗漏任何东西。然而，这个概念是存在的。