rcmd_safe_env
returns a set of environment variables that are
more appropriate for rcmd_safe()
. It is exported to allow manipulating
these variables (e.g. add an extra one), before passing them to the
rcmd()
functions.It currently has the following variables:
CYGWIN="nodosfilewarning"
: On Windows, do not warn about MS-DOS
style file names.
R_TESTS=""
This variable is set by R CMD check
, and makes the
child R process load a startup file at startup, from the current
working directory, that is assumed to be the /test
directory
of the package being checked. If the current working directory is
changed to something else (as it typically is by testthat
, then R
cannot start. Setting it to the empty string ensures that callr
can
be used from unit tests.
R_BROWSER="false"
: typically we don't want to start up a browser
from the child R process.
R_PDFVIEWER="false"
: similarly for the PDF viewer.
rcmd_safe_env()
A named character vector of environment variables.
Note that callr
also sets the R_ENVIRON
, R_ENVIRON_USER
,
R_PROFILE
and R_PROFILE_USER
environment variables
appropriately, unless these are set by the user in the env
argument
of the r
, etc. calls.