Further to Joshua's comment, package "Rdpack" has a function reprompt(), which when called with one argument creates an Rd documentation file. It can do this for methods (S3/S4), classes and package-package if required, e.g.
library(Rdpack) reprompt(lm) creates a lm.Rd in the current working directory. reprompt() actually checks if the current documentation is up to date and updates the usage statement or adds the items for additional arguments as needed. I use it during development. Georgi -----Original Message----- From: R-package-devel [mailto:r-package-devel-boun...@r-project.org] On Behalf Of Joshua Ulrich Sent: 24 March 2016 05:53 To: Ben Bolker Cc: r-package-devel@r-project.org Subject: Re: [R-pkg-devel] Is it possible to reverse engineer a package from the installed library directory ? On Wed, Mar 23, 2016 at 9:25 PM, Ben Bolker <bbol...@gmail.com> wrote: > > You could take your old install and do this: > > library("your_package") > funs <- ls(pos="package:your_package") > dump(funs,"your_package.R") > > that wouldn't recreate documentation, NAMESPACE files, etc., but it > would be a start. > You might be able to recreate the Rd files using the answers to this StackOverflow question: http://stackoverflow.com/q/7493843/271616 Using the example in my answer as a starting point: sink(file="survey.Rd") utils:::.getHelpFile(as.character(help(survey,package="MASS"))) sink() It might still need some formatting clean-up, but hopefully that gets you 80-90% of the solution. > > On 16-03-23 04:43 PM, Paul Hurley wrote: >> >> Several years ago I assembled some of my own most used code into a >> package, and had that installed on my machine. Since then I have >> lost the source files, but still have the package installed in an old >> v2.x R installation. >> >> I now need to use the package in my current R install, which is v3.1, >> and won't let me just copy the directory across, as it complains it >> was build pre v3. Is it possible to reverse engineer a package back >> to R source files so I can then rebuild it in a new package ? >> >> Thanks >> >> Paul. >> >> --http://www.paulhurley.co.uk >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-package-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-package-devel >> > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel -- Joshua Ulrich | about.me/joshuaulrich FOSS Trading | www.fosstrading.com R/Finance 2016 | www.rinfinance.com ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
