[R-pkg-devel] Is it possible to reverse engineer a package from the installed library directory ?

[Joshua Ulrich]

On Wed, Mar 23, 2016 at 9:25 PM, Ben Bolker <bbolker at 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]]
>>
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>>
>
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