On Thursday, September 12, 2013 5:36:35 PM UTC-5, Jeremy Martini wrote:
>
> On my file system, I have a classpath.txt file, which contains a java
> classpath. The classpath contains wildcards, and I need to remove the
> wildcards, and have it expanded out to list out all the .jar files
> individually.
>
> So, instead of classpath.txt containing:
>
> C:/lib1/*;C:/lib2/*
>
>
> I Need:
>
> C:/lib1/file_one.jar;C:/lib1/file_two.jar;C:/lib2/file_three.jar
>
>
>
So you want Puppet to modify the contents of classpath.txt, as opposed to
using the result of the glob expansion somewhere else?
> I already have the Ruby code to do this, I just need to somehow get Puppet
> to run this Ruby code.
>
> I figured I would need to create a custom type, which I've called
> "classpath_expander." I would include this type in my manifest like this:
>
Do yourself a favor and choose a type name that is a noun. That better
reflects the nature of the thing you are naming.
Perhaps "classpath_file" would be appropriate.
>
> classpath_expander { 'expand classpath.txt':
> path => "C:/temp/classpath.txt"
> }
>
>
> Currently, my type is defined like this:
>
> Puppet::Type.newtype(:classpath_expander) do
> @doc = "Reads the classpass in a file, and expands out any wildcards."
>
> newparam(:name, :namevar => true) do
> desc 'An arbitrary name used as the identity of the resource.'
> end
>
> newparam(:path) do
> desc 'The path to the classpath file.'
> end
> end
>
>
>
> But at this point, I'm not sure where to put my Ruby code. All the
> documentation gives examples on how to use the "ensurable" property;
> however, I'm not sure that makes sense in this case, does it? If so, what
> would I need for each of the "create", "destroy", and "exist?" methods?
>
You are missing an essential piece of the puzzle: at least one "provider"
for your custom type. That's the bit that does all the work; the type
itself is mostly restricted to defining the supported parameters.
Here are some docs that may help:
http://docs.puppetlabs.com/guides/custom_types.html
http://docs.puppetlabs.com/guides/provider_development.html
http://docs.puppetlabs.com/guides/complete_resource_example.html
John
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