Hadley Wickham <h.wick...@gmail.com> writes: >> What would be more useful in terms of reproducibility is the capability of >> installing a specific version of a package from a repository using >> install.packages(), which would require archiving older versions in a >> coordinated fashion. I know CRAN archives old versions, but I am not aware >> if we can programmatically query the repository about this. > > See devtools::install_version(). > > The main caveat is that you also need to be able to build the package, > and ensure you have dependencies that work with that version.
The compiling will always be the problem when using older source packages, whatever is done. But for the dependencies: an automatic parsing of the dependencies (DEPENDS, IMPORTS, ...) would help a lot. Together with a command which scans the installed package in the session and stores them in a parsable human readable format so that all packages (with the specified version) required can be installed with one command, and I think the problem would be much closer to be solved. Rainer > > Hadley -- Rainer M. Krug email: Rainer<at>krugs<dot>de PGP: 0x0F52F982
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