rmarkdown support?

[almartin82]

Hi Chris,

If this is too far afield, feel free to close, but am trying to figure out how to include rmarkdown as a dependency, so that I can rmarkdown::render().

Unfortunately rmarkdown requires pandoc as a dependency. Not sure how to install pandoc in my init.R. Would I need to fork the buildpack to include those binaries? There's a debian package on github. RStudio also hosts binaries.

Any pointers/ideas would be greatly appreciated. Happy to contribute back to the readme/vignette! Thanks!

[virtualstaticvoid]

Hi, yes it's possible, but would be easier with a custom build than trying to hack the buildpack. I created the heroku-buildpack-r-build for this purpose.

The pandoc debian package can be installed by adding it to the list of packages in the Aptfile of the build project. See heroku-buildpack-apt for more information on the Aptfile.

If this is something many people need, then I'll be happy to merge it in and rebuild the latest R versions.

In the meantime, I've build one for you with this package included. You can try it out by specifying the R version as 3.2.1 and Buildpack version as 20150727-1701 in the .r-version and .r-builpack-version files respectively (see example of how to specify versions here).

[almartin82]

ahhhhhhh -- ok, this makes a lot of sense. thanks!

[mattvaldez]

I see this is closed, but I was hoping to get some support on this same issue rather than open a new one. I am using this buildpack version, and it is installing pandoc, however the version is 1.12.2.1, and when the application runs rmarkdown::render(), it errors out with:
Error: pandoc version 1.12.3 or higher is required and was not found.

I am uncertain on how to update pandoc, any suggestions?

[virtualstaticvoid]

For anyone else finding this issue, the buildpack has been updated to include pandoc 1.15 now. (See #55)