Le 31 mai 2012 à 18:33, Mitch Gitman a écrit : > Can someone point me to a good, reference example of consuming an Ant > project programmatically? The code needs to have access to the > org.apache.tools.ant.Project object. > > I have been able to do this, but with just one catch. Below are the > relevant lines of Java code: > Project project = new Project(); > project.setBaseDir(basedir); // basedir is a File object > project.init(); > ProjectHelper.configureProject(project, buildFile); // buildFile is a File > object > > From here, I can call executeTarget on the Project object as needed. > > Everything works fine, but here's the catch. Whatever the code is that > instantiates the Project object, the Project will take the libraries in the > classpath for that code (typically a JUnit test) and put that in its own > classpath. > > So, for example, if the programmatically instantiated Ant needs to call the > javac Ant task, then I would need to add lib/tools.jar in the JDK to the > runtime classpath for the code that launches Ant. Likewise, there might be > some libraries that are needed in the test's classpath but aren't needed by > the Ant project that is launched by the test but which will then leak into > the Project's classpath and wreak havoc. > > My guess is there's something about the coreLoader member of the Project > object I need to be controlling. I've also looked at the AntClassLoader > class. My fear is there's something really fundamental about the Ant > ClassLoader, or maybe just ClassLoaders in general, that I'm not quite > grasping. > > This is where it would be great if there's an existing, isolated example of > creating a Project that has the expected JARs in Ant lib plus tools.jar but > nothing more. This seems like the kind of thing that people have had to do > countless times before.
You have indeed to properly setup the classloader used by the Project. If you want to setup a classloader like the one which is used at the boostrap of Ant, when it is picking up jars in the .ant/lib folder for instance, and also the tools.jar (see when Locator.getToolsJar() is called), you should look into the code of org.apache.tools.ant.launch.Launcher.run(String[]). I have never played with an AntClassLoader, but probably a classical URLClassloader will work just fine. Nicolas --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@ant.apache.org For additional commands, e-mail: user-h...@ant.apache.org
