shrink jclouds-cli size

[gaul]

Presently the tar.gz is 49 MB -- can we prune any unneeded dependencies? The biggest offenders are Karaf Jaas (7 MB), Spring (8 MB), Pax (7 MB) and Groovy (6 MB).

[iocanel]

We can and should get rid of spring. We may be able to get rid of karaf jaas. We could possibly replace groovy-full with the lightest possible groovy jar that is needed for use with the scripting engine. We can't get rid of pax.

[codefromthecrypt]

as I understand groovy is dragged in only to format column names, right? Is there another way that is lighter weight? or an option to not require this?

[iocanel]

Groovy is used as an expression language to retrieve the data to display for each column.

We could build our own simple expression language that will use reflection and introspection, but it will lack closures, which is really useful in many cases. For example:

hardware.headers=[id];[ram];[cpu];[cores] hardware.expressions=hardware.id;hardware.ram;hardware.processors.sum{it.cores*it.speed};hardware.processors.sum{it.cores}

This is why I preffered groovy over ognl, mvel or a custom build language.

[codefromthecrypt]

yeah I guess it depends on whether folks are in fact making custom aggregating columns all that often, and whether we want to make default drag in support for that. ex. for fire-and-forget cli, this is a replacement for ec2-describe-* etc. style invocation. Basic clis usually don't try to do fancy things, and can be much smaller.

[iocanel]

I specified explicilty the features list. This keeps out of the cli karaf features that we are not using. This reduced the size of the cli to the half.

There is still room for improvement, by removing the groovy stuff, so we might get the distro down to 18MB. Beyound that will require much more effort.

[gaul]

Can we also remove bcpkix-jdk15on-1.47.jar, bcprov-jdk15on-1.47.jar, and netty-3.3.1.Final.jar from jclouds-karaf? This would save about 3.4 MB.