How use jarbundler to create an .app from JPortsUI.jar?

[Jeremy Lavergne]

> I have the MacPorts ports of jarbundler (@2.2.0_0) and apache-ant (@1.9.3_0) installed and active. I have the file JPortsUI.jar in the folder  ~/jPorts.
> 
> Trying to make sense of the docs at http://informagen.com/JarBundler/, I created in that same folder the file build.xml
> 
>     <taskdef name="jarbundler" 
>         classname="net.sourceforge.jarbundler.JarBundler" />
> 
> as well as file jarbundler:
> 
>     <jarbundler dir="."
>             name="jPort"
>             mainclass="JPortsUI"
>             jar="./JPortsUI.jar" />
> 
> I tried now:
> 
>  cd ~/JPorts
>  ant build.xml
> 
> This generates error:
> 
>  Buildfile: /Users/[myuserdirname]/jPorts/build.xml
> 
>  BUILD FAILED
>  /Users/[myuserdirname]/jPorts/build.xml:2: Unexpected element "{}tasked" {antlib:org.apache.tools.ant}taskdef

My understanding of the error is that “taskdef” tag must be inside a wrapper tag.

Consider this from StackOverflow:
http://stackoverflow.com/a/3582036


> Question: What am I doing wrong?
> 
> A couple of particular questions:
> 
> (i) Should there be an extension to file "jarbundler" and, if so, what?
> 
> (ii) The docs at http://informagen.com/JarBundler/ say to "move the file jarbundler-2.3.1.jar into your local ANT lib directory." Given the configuration of MacPorts, with ports going into /opt, what does that mean I also need to do, if anything?  I note that /opt/local/lib has no ant subdirectory.