#' Command(s) to install system requirements of a package, on a platform
#'
#' @inheritParams sysreqs
#' @return Character scalar, a shell command to run to install
#' the system requirements on a given platform.
#'
#' @export
sysreq_commands <- function(desc, platform = current_platform(),
soft = TRUE) {
pkgs <- sysreqs(desc, platform, soft = soft)
url <- make_url(
sysreqs_platform_url,
platform = platform
)
cmd <- download_json(url)[["install-commands"]]
pkgs <- unique(pkgs)
scripts <- grep("^script: ", pkgs, value = TRUE)
pkgs <- setdiff(pkgs, scripts)
script_inst <- if (length(scripts)) {
files <- gsub("^script: ", "", scripts)
paste0(
sprintf("bash <(curl -L -s %s/script/%s)", sysreqs_base_url, files),
collapse = "\n"
)
}
pkg_inst <- if (length(pkgs)) {
pkgs_str <- paste(pkgs, collapse = " ")
sub("${sysreqs}", pkgs_str, cmd, fixed = TRUE)
}
if (length(script_inst) + length(pkg_inst) > 0) {
str_trim(paste(pkg_inst, script_inst, sep = "\n"))
} else {
""
}
}
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