Functions to enable or disable the integration of install_sys
into install.packages. When enabled, packages are installed
transparently from system repositories if available, including dependencies,
and from the configured R repositories if not.
Details
To enable bspm system-wide by default, include the following:
suppressMessages(bspm::enable())
into the Rprofile.site file. To enable it just for a particular user,
move that line to the user's ~/.Rprofile instead.
By default, enabling bspm triggers a check of the backend, and a
warning is raised if the system service is required but not available. To
avoid this check, options(bspm.backend.check=FALSE) can be set.
Enabling bspm sets default installation type to "both",
which means 'use binary if available and current, otherwise try source'.
The action if there are source packages which are preferred is controlled by
getOption("install.packages.compile.from.source"). Set this option to
"never" to always prefer binaries over source packages, with an
informative message about newer versions available from source.
If binaries are always preferred and no message is required, a special
fast mode can be enabled via options(bspm.version.check=FALSE),
(true by default) which completely skips version checking.
Examples
if (FALSE) {
# install 'units' and all its dependencies from the system repos
bspm::enable()
install.packages("units")
# install packages again from CRAN
bspm::disable()
install.packages("errors")
}