Q:

Building an R package error with devtools::document

I am building R packages using devtools. I've built a package with some functions that I'd like to include. And I'd like to load the package and its documentation at startup. My package files are located at the location:
'~/global/Rcode/Startup Package'

My .Rprofile file looks like this:
.First <- function(){
    library(devtools)
    location <- '~/global/Rcode/Startup Package'
    document(location)
}

However when I open R, the functions from the package are loaded but the documentation is not. 
If I run the same lines of code after startup myself, namely: 
library(devtools)
location <- '~/global/Rcode/Startup Package'
document(location)

then everything works and the package correctly documents. This thus seems like a rather weird bug!
(As a partial fix I can run 
install(location) 

and treat it like a normal r package and everything works fine, however this takes time and as I intend to update the package a lot and do not really want to have to run this every time, especially as the devtools option should work.)

A:

Make sure utils is loaded before loading devtools otherwise there's no help function for devtools to overwrite.
With .Rprofile:
.First = function(){
library(utils)
library(devtools)
document("./foo")
}

then R startup goes:
[stuff]
Type 'q()' to quit R.

Updating foo documentation
Loading foo

And help is devtools version:
> environment(help)
<environment: namespace:devtools>

Remove that library(utils) and you'll see the help function is the one in utils that won't find your package documentation.

