How to set lib path in ANT when the build file location changes

Question

I am new to Ant. Following is the folder structure for my application.

• src : source code
• lib : jars
• util : build.xml (ant build file)
• output : This will have a jar file generated from source

The user should be able to copy this jar file in the output folder to anywhere and when extracted it will have

• lib folder: contains all the libs needed
• build.xml : ant build file to run

The user should be able to run this build.xml as "ant -f build.xml run"

The problem is, in the code structure the build.xml is under output folder, so when I write the build.xml, the lib folder path is set to ../lib/ But when the build.xml is run from the extracted folder, the build.xml is at root level and ../lib will not work since the relative path for lib would be "./lib/"

Help appreciated!

Thanks

Answer 1

尝试将build.xml放在util文件夹之外。或将util /添加到输出列表output.library.jar = bin /，\\ util /在build.properties文件中

Answer 2

Make lib dir dynamic, loaded from a property file. In the properties file local.props (that will be packaged into the jar in the root) you will have:

lib.dir=lib

You will have also another local.props file for your build process, when build.xml is in util directory. This file would have:

lib.dir=../lib

One of the first instructions in your build file must be:

<property file="local.props" />

When referencing to lib directory always use ${lib.dir} . This will make lib directory not only flexible, but also configurable on user side, as a side effect. local.props file is commonly used to provide configurability to script user.