On Mon, May 13, 2013 at 4:03 PM, Greg Von Kuster <g...@bx.psu.edu> wrote:
> Hello Björn,
> On May 12, 2013, at 12:36 PM, Björn Grüning wrote:
>> Hi Greg,
>>> The current revision setting is treated as a minimum, so any available 
>>> updates are retrieved automatically at the time of installation.
>> if I get that right, we should always have the latest revision
>> installed, regardless of the specified requirement revision. Is that
>> correct?
> No, this is not correct.  By "minimum", we mean that the revision setting is 
> treated as a minimum within the set of changeset revisions up to, but not 
> including, the next installable changeset revision in the change log.
> For example, assume a change log like this:
> changset revision       Installable revision
> 0: sjekvub                      yes
> 1: jjtofvp
> 2: htocegy
> 3: jswofpt                      yes
> 4: jaqvkrc
> In the above example, sjekvub  is considered the "minimum revision for revs 
> 0, 1, 2, and jswofpt  is considered the minimum revision for revs 3, 4.  If a 
> dependency definition defined revision sjekvub, then what will actually be 
> installed is "2: htocegy".
> This approach guarantees reproducibility.  For example, assume revision 0: 
> sjekvub contains version 1 of tool A and revision 3: jswofpt contains version 
> 2 of tool A.  If you install 0: sjekvub, then you cannot upgrade beyond 2: 
> htocegy for that specific repository installation.  To get version 2 of tool 
> A you have to install revision 3: jswofpt of the repository as a separate 
> installation.
> This ensures that both versions of the same tool are always available to you 
> for reproducibility.
> This information is document in the following section of the tool shed wiki:
> http://wiki.galaxyproject.org/RepositoryRevisions
>> I do not think that is working atm. It seems its using an exact match.
> If you are seeing behavior that contradicts the above information or the 
> information in the tool shed wiki, please let me know some specifics.
> Thanks!

Woosh - that largely went over my head. It sounds rather complicated.
Did I get the gist right:

To paraphrase, if I declare a dependency on revision X, then what will
be installed could be X or an EARLIER revision - stepping back until
an installable revision is found.

(Here I'd have called X a "maximum" revision, but this is seemingly
open to two opposite view points - thus our confusion).

That is very different to what I (and Bjorn?) had understood you to mean
by "minimum", namely if we declare a dependency on revision X, then
we'll get either X or a LATER revision.

I guess this means an option to explicitly ask for the latest revision
would be regarded as counter to the Galaxy reproducibility goals?



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