On Thu, May 9, 2013 at 6:05 PM, Greg Von Kuster <g...@bx.psu.edu> wrote:
> Currently I feel that a tool dependency definition should allow for only a 
> singe
> download of some item, and if that item requires other items. they should be
> defined as separate dependencies that are installed using the
> prior_installation_required=True attribute.

That seems too idealised: Not every tool is bundled up nicely for a
clean install, often there are bits and pieces which must be fetched
individually. In some cases this is a judgement call about when this
should be a separate dependency.

> Is there a case where this is not possible?  If so, I'm willing to enable
> downloading more than 1 item per dependency package definition, but I
> think we have to be careful in how we go about this.

Yes, effectiveT3 comes as four JAR files - the core tool and three models:

This is an example of a fairly common pattern where there is a core tool,
plus one or more essential data files to be downloaded individually.

> In any case, wget should not be used yet as it requires wget to be on the
> installation server, and we have not yet decided what 3rd party utilities we
> can assume exist in that environment.
> If there is justification for allowing download_by_url multiple times in the
> same package dependency definition, then I would rather enhance the
> tool shed framework to support that.

If you won't want us to use wget, then we will likely also need a
download_by_url variant which DOES NOT decompress anything.
I'm thinking of compressed data files which should stay compressed.


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