从性能变量的Ant文件 [英] Variables from properties file in Ant

问题描述

我有一个Android应用程序，需要针对不同的环境（如UAT，分期，生产等），待建。每个环境都需要不同的属性（例如，网址，包装等）。

我希望把所有的不同的参数到一个单一的属性文件和preFIX与它相匹配的环境中每个参数。

例如，属性文件将包含 dev.home-URL = http://home_dev.com 的开发环境和刺。家庭URL = http://home.com 的生产环境。

我用下面创建一个指向物业，一个preFIX文件属性 PARAMS ：

 ＆LT;属性文件=parameters.propertiespreFIX =PARAMS/＆GT;
 

和使用属性，我用：

  $ {params.home-URL}
 

问题来了，当我需要添加环境的preFIX的参数。 它最终会这样看，这显然无法做到的：

  $ {PARAMS。$ {ENV-preFIX}。家里-URL}
 

解决方案

一个关于蚂蚁经常被问到的问题是：

我怎么可以这样做＆LT;属性名= 托值=$ {$ {anotherprop}}/＆GT; （双扩展属性）

下面的Ant构建文件是来自一些常见问题。

parameters.properties

  dev.home-URL = http://home_dev.com
prod.home-URL = http://home.com
 

的build.xml

 ＆LT;项目默认=榜样＆GT;
    ＆LT;属性名=ENV-preFIX值=开发/＆GT;
    ＆LT;属性文件=parameters.propertiespreFIX =PARAMS/＆GT;

    ＆LT; macrodef名=propertycopy＆GT;
        ＆LT;属性名=姓名/＆GT;
        ＆LT;属性名=从/＆GT;
        ＆LT;连续＆GT;
            ＆LT;属性名=@ {名}值=$ {@ {从}}/＆GT;
        ＆LT; /顺序＆GT;
    ＆LT; / macrodef＆GT;

    ＆lt;目标名称=榜样＆GT;
        ＆LT;从= propertycopy名=local.property。PARAMS $ {ENV-preFIX}。家里-URL/＆GT;
        ＆LT;回声＆GT; $ {local.property}＆LT; /回声＆GT;
    ＆LT; /目标和GT;
＆LT; /项目＆GT;
 

执行例如任务输出：

 构建文件：/workspace/build.xml
例：
     [回应] http://home_dev.com
BUILD SUCCESSFUL
总时间：405毫秒
 

I have an Android app that needs to be built for different environments (e.g., UAT, staging, production, etc.). Each environment needs different properties (e.g., URLs, packages, etc.).

I would like to put all the different parameters into a single properties file and prefix each parameter with the environment it matches to.

For example, the properties file will contain dev.home-url = http://home_dev.com for the development environment and prod.home-url = http://home.com for the production environment.

I use the below to create a property that points to the properties file with a prefix of params:

<property file="parameters.properties" prefix="params" />

And to use a property, I use:

${params.home-url}

The problem comes when I need to add the prefix of the environment to the parameter. It would end up looking like this, which obviously can't be done:

${params.${env-prefix}.home-url}

解决方案

A frequently asked question about Ant is:

How can I do something like <property name="prop" value="${${anotherprop}}"/> (double expanding the property)?

The following Ant build file was inspired by that FAQ.

parameters.properties

dev.home-url = http://home_dev.com
prod.home-url = http://home.com

build.xml

<project default="example">
    <property name="env-prefix" value="dev" />
    <property file="parameters.properties" prefix="params" />

    <macrodef name="propertycopy">
        <attribute name="name" />
        <attribute name="from" />
        <sequential>
            <property name="@{name}" value="${@{from}}" />
        </sequential>
    </macrodef>

    <target name="example">
        <propertycopy name="local.property" from="params.${env-prefix}.home-url" />
        <echo>${local.property}</echo>
    </target>
</project>

Executing the example task outputs:

Buildfile: /workspace/build.xml
example:
     [echo] http://home_dev.com
BUILD SUCCESSFUL
Total time: 405 milliseconds

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