devtools::build_vignettes('rgcam') gives Error: Can't find 'rgcam'

[cgnolte]

Using R version 3.4.4 on RHEL 7.7, I installed rgcam via

devtools::install_github('JGCRI/rgcam')

This took quite some time. It appeared to complete successfully, but I did get this warning message:
"GitHub repo contains submodules, may not function as expected!"
I then tried to build the vignettes:

library('rgcam')
devtools::build_vignettes('rgcam')

But got the error message:
Error: Can't find 'rgcam'.

[rplzzz]

The warning about the submodule is harmless. The submodule contains the source code for the Java code that accesses the GCAM output, but all you really need is the jar-file, which is included.

The second issue is more puzzling. Just to be clear, do you get the error message after running library(rgcam) or after running build_vignettes?

[cgnolte]

I get the error message after running (attempting to run) build_vignettes.

[rplzzz]

Ah, I see the problem. build_vignettes wants the path to the root of the package source, not the name of the packages. So, it's looking for a directory called rgcam, and there isn't one. There are two ways you can go about it.

1. Clone the repository from github, then change into the top folder of the repository and say build_vignettes('.'), or ...
2. Tell install_github to build the vignettes at install time: install_github('JGCRI/rgcam', build_vignettes=TRUE)

[cgnolte]

Thanks, it is working now. You might want to modify the documentation at the bottom of this page.

[rplzzz]

Thanks, @cgnolte, I've created another issue to remind me to do that.