How to set Ant properties based on variables in Eclipse?

Question

I have a common problem and there are probably countless ways to solve it. I\'m looking for an elegant, simple solution to this typical scenario:

I have a project in Ec

Answer 1

See Window -> Preferences -> Ant -> Runtime -> Properties to define custom ant properties that should be available to any ant script invoked from Eclipse. The simply set the same property manually when invoking script from command-line.

Your build.properties file can exist wherever you like. Use normal Ant facilities to import it into your script.

Answer 2

You can set eclipse relative properties for your ANT Build from eclipse

Go to your ANT Builder properties and in arguments section you can set properties using -D as below

-Dworkspace="${workspace_loc}" -Dproject_dir="${project_loc}"

(here workspace_loc and project_loc are eclipse variables). These properties can be accessed in your ANT build script like regular properties, for example:

<echo message="${workspace}" />
<echo message="${project_dir}" />

Answer 3

For my project archieve.

ProjectName <dir>
 |_ ant <dir>
     |_ ant.xml

Your case can just simply change the ant xml file, the <project default="main" basedir="../"/>

Then I can get the project root using variable of

e.g. <echo message= "Project Root: ${basedir}" />

Answer 4

I think what I'm looking for is to add the following to the build.properties file:

project.root = ${basedir}

alternatively, I can just use the basedir property whenever project.root is needed.

I happened to be looking at the source code for ivy.properties and I saw the basedir property being used. I just tested and verified that this property works on different machines both from inside eclipse and from the command line as well as when making a call to ant from a different directory such as:

ant -f /path/to/eclipse/workspace/projectName/build.xml

When I get a minute, I will verify that this also works when importing the property file in different locations (such as inside src/main/resources/config/ivy/ivysettings.xml).

Answer 5

if you need more than the trivial basedir stuff =
Ant4Eclipse - a bunch of ant tasks for access to eclipse configurations from within ant -
may help you. Just use it as is or grep the code and pick the relevant parts..