Hi, Bioconductor devs,

In very rare cases (eg
http://article.gmane.org/gmane.science.biology.informatics.conductor/35266/match=update+edgeR)
where BioC package authors have released an urgent bug fix within a given
BioC update cycle, the usual automated biocLite installation process does
not appear to support recreating a very specific R/Bioc environment
containing a precisely specified package release (say the previous edgeR
2.2.0 fixed by 2.2.5). You might argue a user should never do this, but
since we want truly reproducible analyses (the context is the new toolshed
dependency control mechanisms in Galaxy), we need to control *all*
dependencies for a given release of a (eg edgeR) wrapper at this very fine
level of granularity, acknowledging that reproducible =/= valid.

Take that edgeR update as a test case. I know about
http://bioconductor.org/checkResults/ and eg
https://hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/edgeR/ but I
have been unable to figure out how to track down the 2.2.0 edgeR archive
(or for that matter the 2.2.5 bugfix) - I'm sure it is in svn somewhere.
Any advice on how I can identify a long term reliable svn or other url to
script the download of a specific (even if know buggy) historical archive
of (eg) edgeR 2.2.0?

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