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#' R platforms
#'
#' @details
#' `system_r_platform()` detects the platform of the current R version.
#' `system_r_platform_data()` is similar, but returns the raw data instead
#' of a character scalar.
#'
#' By default pak works with source packages and binary packages for
#' the current platform. You can change this, by providing different
#' platform names in the [`pkg.platforms`][pak-config] option or the
#' [`PKG_PLATFORMS`][pak-config] environment variable.
#'
#' This option may contain the following platform names:
#' * `"source"` for source packages,
#' * `"macos"` for macOS binaries that are appropriate for the R versions
#' pak is working with. Packages for incompatible CPU architectures are
#' dropped (defaulting to the CPU of the current macOS machine and x86_64 on
#' non-macOS systems). The macOS Darwin version is selected based on the
#' CRAN macOS binaries. E.g. on R 3.5.0 macOS binaries
#' are built for macOS El Capitan.
#' * `"windows"` for Windows binaries for the default CRAN architecture.
#' This is currently Windows Vista for all supported R versions, but it
#' might change in the future. The actual binary packages in the
#' repository might support both 32 bit and 64 builds, or only one of
#' them. In practice 32-bit only packages are very rare. CRAN builds
#' before and including R 4.1 have both architectures, from R 4.2 they
#' are 64 bit only. `"windows"` is an alias to `i386+x86_64-w64-mingw32`
#' currently.
#' * A platform string like `R.version$platform`, but on Linux the name
#' and version of the distribution are also included. Examples:
#' - `x86_64-apple-darwin17.0`: macOS High Sierra.
#' - `aarch64-apple-darwin20`: macOS Big Sur on arm64.
#' - `x86_64-w64-mingw32`: 64 bit Windows.
#' - `i386-w64-mingw32`: 32 bit Windows.
#' - `i386+x86_64-w64-mingw32`: 64 bit + 32 bit Windows.
#' - `i386-pc-solaris2.10`: 32 bit Solaris. (Some broken 64 Solaris
#' builds might have the same platform string, unfortunately.)
#' - `x86_64-pc-linux-gnu-debian-10`: Debian Linux 10 on x86_64.
#' - `x86_64-pc-linux-musl-alpine-3.14.1`: Alpine Linux.
#' - `x86_64-pc-linux-gnu-unknown`: Unknown Linux Distribution on x86_64.
#' - `s390x-ibm-linux-gnu-ubuntu-20.04`: Ubuntu Linux 20.04 on S390x.
#' - `amd64-portbld-freebsd12.1`: FreeBSD 12.1 on x86_64.
#'
#' @return `system_r_platform()` returns a character scalar.
#'
#' `system_r_platform_data()` returns a data frame with character
#' scalar columns:
#' * `cpu`,
#' * `vendor`,
#' * `os`,
#' * `distribution` (only on Linux),
#' * `release` (only on Linux),
#' * `platform`: the concatenation of the other columns, separated by
#' a dash.
#' @export
#' @seealso These function call [pkgcache::current_r_platform()] and
#' [pkgcache::current_r_platform_data()].
#' @examplesIf FALSE
#' system_r_platform()
#' system_r_platform_data()
system_r_platform <- function() {
remote(
function(...) asNamespace("pak")$system_r_platform_internal(...),
list()
)
}
system_r_platform_internal <- function() {
pkgcache::current_r_platform()
}
#' @export
#' @rdname system_r_platform
system_r_platform_data <- function() {
remote(
function(...) asNamespace("pak")$system_r_platform_data_internal(...),
list()
)
}
system_r_platform_data_internal <- function() {
pkgcache::current_r_platform_data()
}
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