How do I pass an argument to an Ant task?

I'm not very good with Ant, but we're using it as a build tool. Right now, we can run "ant test" and it'll run through all the unit tests.

However, I'd love to be able to do something like ant test some_module and have it acc开发者_StackOverflow中文版ept some_module as a parameter, and only test that.

I haven't been able to find how to pass command line args to Ant - any ideas?

One solution might be as follows. (I have a project that does this.)

Have a separate target similar to test with a fileset that restricts the test to one class only. Then pass the name of that class using -D at the ant command line:

ant -Dtest.module=MyClassUnderTest single_test

In the build.xml (highly reduced):

<target name="single_test" depends="compile" description="Run one unit test">
    <junit>
        <batchtest>
            <fileset dir="${test.dir}" includes="**/${test.module}.class" />
        </batchtest>
    </junit>
</target>

You can also define a property with an optional default value that can be replaced via command line, e.g.

<target name="test">
  <property name="moduleName" value="default-module" />
  <echo message="Testing Module: ${moduleName}"/>
  ....
</target>

and run it as:

ant test -DmoduleName=ModuleX

What about using some conditional in your test target and the specifying -Dcondition=true?

<target name="test" depends="_test, _test_if_true>
   ...
</target> 

<target name="_test_if_true" if="condition">
   ...
</target>

<target name="_test" unless="condition">
   ...
</target>

Adapted a bit from the ant faq.

You can define a property on commandline when invoking ant:

ant -Dtest.module=mymodulename

Then you can use it as any other ant property:

...
    <fileset dir="${test.dir}" includes="**/${test.module}.class" />
...

Have a look at Ant's manual.

I tried the solutions posted here for the very same original question. Yes just use ant -D<arg_name>. THe -D is a "keyword" I guess. I'm no ant expert and have not read the manuals in detail. Then inside the ant XML files can be accessed like: ${arg_name}

For instance you can have an argument name like: arg.myarg, so in XML ${arg.myarg}.

Ant really doesn't have parameters_ for the build file. I can think of a few ways to do this:

Use a special target to specify the tests. You can use the <for/> task from AntContrib to allow you to specify multiple tests. You'll need to download the Ant-Contrib jar file. I recommend placing it inside your project under the `${basedir}/antlib/antcontrib" directory. That way, when others checkout your project, they get the needed Ant-Contrib jar file.

<property name="antlib.dir"     value="${basedir}/antlib"/>
<property name="antcontrib.dir" value="${antlib}/antcontrib"/>

<!-- Set up the ant contrib tasks for your use -->
<taskdef resource="net/sf/antcontrib/antlib.xml">
    <classpath>
        <fileset dir="${antcontrib.dir}"/>
    </classpath>
</taskdef>

<target name="select-test"
    description="Select the tests to run"
    depends="test-compile"
    if="junit-tests">
       <for parameter="module" 
          list="${junit-tests}"
          delimiter=" ">
          <sequential>
              <junit
                 fork="true"
                 ...>
                 <batchtest todir="$target/unit-tests">
                 <fileset dir="${test.destdir}">
                    <include name="**/@{module}.class"/>
                 </fileset>
             </junit>
         </sequential>
      </for>
</target>

You cab now run multiple tests like this:

$ ant -D"test-one test-two test-three" select-test

You could try this to access one target at a time. Add these lines to your build.xml file :

<project name="whatever" default="default">
    <input message="Please select module:" addproperty="mod" />
    <target name="default" depends="${mod}/>
...
</project>

This allows you to enter the module you want to execute and execute that itself instead of running the whole build.xml

You might need to make a few more changes to your build.xml for this to work perfectly.

For the arguments , there is Facility called property. You need to set the property. As in ANT plain arguments is taken as target name.

Lest say you have two modules in your project ModuleX and ModuleY where ModuleX has 2 testcases to run and ModuleY with 10 testcases.

You could do something like this :

ant runTestsOnModule -Dtestmodule="ModuleX" 
       OR to test all modules by calling 
ant tests

<target name="runTestsOnModule">
  <antCall target="testcase${testmodule}"/>
</target>'

<! -- run single module -->
<target name="runTestsOnModule">
  <antCall target="testcase${testmodule}"/>
</target>

<!--run all tests-->    
<target name="tests">
   <antcall target="testcaseModuleX">
   <antcall target="testCaseModuleY">
</target>

<target name="testcaseModuleX">
   ..run junit task to call 2 testcase
</target>

<target name="testcaseModuleY">
  ....run junit task to call 10 testcase
</target>