问题
When I click "Build & Reload" on the Build tab within RStudio, I get the following error:
==> devtools::document(roclets=c('rd', 'collate', 'namespace'))
Error in loadNamespace(name) : there is no package called 'devtools'
Calls: suppressPackageStartupMessages ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted
Exited with status 1.
But when I just enter devtools::document(roclets=c('rd', 'collate', 'namespace')) directly into the console, it works.
In addition, if I uncheck "Build & Reload" under "Automatically roxygenize when running:" in the Build Tools -> Roxygen config, the error disappears.
I've installed the latest devtools with devtools::install_github("hadley/devtools"). I'm using Windows.
If anyone has an suggestions, thank you in advance!
回答1:
I had to uncheck "Build & Reload" under "Automatically reoxygenize when running:" in the Build Tools -> Roxygen Configure menu. Installing devtools in the program files/r/3.2.3/lib helped, but it still wanted all the dependencies there as well. Using packrat didn't seem to help either..
回答2:
Here's a convenient solution based on mathematical.coffee's comment:
Just run this from Rstudio:
writeLines("install.packages('devtools', repos = 'https://cran.rstudio.com/')", "inst.R")
system("Rscript --vanilla inst.R")
回答3:
I encountered this problem multiple times and also with other packages related to devtools (e.g. knitr in the devtools::check()). As it was getting on my nerves, I tried to install devtools in other location of .libPaths(), i.e. in the first standard one (in my case it was /usr/local/lib/R/site-library/). It was telling me that I needed sudo rights. I gave them (as I was utterly annoyed by this) but still, it is needed a large number of dependencies. Therefore, my practical solution was to sudo-copy my "special" R library folder into the standard one. The following code fixed all my problems:
sudo cp -rf /home/myname/R/x86_64-pc-linux-gnu-library/3.4/* /usr/local/lib/R/site-library/
I would like to point out that this is the only effective solution I found. Even so, it lacks elegance and I would definitely prefer if the guys from Rstudio provide a way to link Rstudio to a personally-defined library. It was already my case on startup and I had to add my personal lib to .libPaths() in the file Rprofile.site which is run every time on R startup, but this did not solve the above problem anyhow.
来源：https://stackoverflow.com/questions/29372288/build-reload-in-rstudio-on-windows-devtoolsdocument-says-devtools-not-fou