r_vanilla
Run an R child process, with no configuration
It tries to mimic a fresh R installation. In particular:
No library path setting.
No CRAN(-like) repository is set.
The system and user profiles are not run.
Usage
r_vanilla(func, args = list(), libpath = character(), repos = c(CRAN
= "@CRAN@"), cmdargs = "--slave", system_profile = FALSE,
user_profile = FALSE, env = character(), ...)Arguments
- func
Function object to call in the new R process. The function should be self-contained and only refer to other functions and use variables explicitly from other packages using the
::notation. The environment of the function is set to.GlobalEnvbefore passing it to the child process. Because of this, it is good practice to create an anonymous function and pass that tocallr, instead of passing a function object from a (base or other) package. In particularr(.libPaths)
does not work, because
.libPathsis defined in a special environment, butr(function() .libPaths())
works just fine.
- args
Arguments to pass to the function. Must be a list.
- libpath
The library path.
- repos
The repos option. If
NULL, then no repos option is set. This options is only used ifuser_profileorsystem_profileis setFALSE, as it is set using the system or the user profile.- cmdargs
Command line arguments to pass to the R process. Note that
c("-f", rscript)is appended to this,rscriptis the name of the script file to run. This contains a call to the supplied function and some error handling code.- system_profile
Whether to use the system profile file.
- user_profile
Whether to use the user's profile file.
- env
Environment variables to set for the child process.
- ...
Additional arguments are passed to
r().
See Also
Examples
# NOT RUN {
# Compare to r()
r(function() .libPaths())
r_vanilla(function() .libPaths())
r(function() getOption("repos"))
r_vanilla(function() getOption("repos"))
# }