Differences to r():
No extra repositories are set up.
The --no-save, --no-restore
command line arguments are not used. (But --slave still is.)
The system profile and the user profile are loaded.
No extra environment variables are set up.
r_copycat(func, args = list(), libpath = .libPaths(),
repos = getOption("repos"), cmdargs = "--slave",
system_profile = TRUE, user_profile = TRUE, env = character(), ...)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 .GlobalEnv before passing it to the child process.
Because of this, it is good practice to create an anonymous
function and pass that to callr, instead of passing
a function object from a (base or other) package. In particular
r(.libPaths)
does not work, because .libPaths is defined in a special
environment, but
r(function() .libPaths())
works just fine.
Arguments to pass to the function. Must be a list.
The library path.
The repos option. If NULL, then no
repos option is set. This options is only used if
user_profile or system_profile is set FALSE,
as it is set using the system or the user profile.
Command line arguments to pass to the R process.
Note that c("-f", rscript) is appended to this, rscript
is the name of the script file to run. This contains a call to the
supplied function and some error handling code.
Whether to use the system profile file.
Whether to use the user's profile file.
Environment variables to set for the child process.
Additional arguments are passed to r().