Nothing
setOption <- function(name, value) {
oldValue <- getOption(name)
args <- list(value)
names(args) <- name
do.call(options, args = args)
invisible(oldValue)
}
# Set an R option from an environment variable
update_package_option <- function(name, mode = "character", default = NULL, split = NULL, trim = TRUE, disallow = c("NA"), force = FALSE, debug = FALSE) {
## Nothing to do?
value <- getOption(name, NULL)
if (!force && !is.null(value)) return(getOption(name, default = default))
## name="pkg.foo.bar" => env="R_PKG_FOO_BAR"
env <- gsub(".", "_", toupper(name), fixed = TRUE)
env <- paste("R_", env, sep = "")
env_value <- value <- Sys.getenv(env, unset = NA_character_)
## Nothing to do?
if (is.na(value)) {
if (debug) mdebugf("Environment variable %s not set", sQuote(env))
if (!is.null(default)) setOption(name, default)
return(getOption(name, default = default))
}
if (debug) mdebugf("%s=%s", env, sQuote(value))
## Trim?
if (trim) value <- trim(value)
## Nothing to do?
if (!nzchar(value)) {
if (!is.null(default)) setOption(name, default)
return(getOption(name, default = default))
}
## Split?
if (!is.null(split)) {
value <- strsplit(value, split = split, fixed = TRUE)
value <- unlist(value, use.names = FALSE)
if (trim) value <- trim(value)
}
## Coerce?
mode0 <- storage.mode(value)
if (mode0 != mode) {
suppressWarnings({
storage.mode(value) <- mode
})
if (debug) {
mdebugf("Coercing from %s to %s: %s", mode0, mode, commaq(value))
}
}
if (length(disallow) > 0) {
if ("NA" %in% disallow) {
if (any(is.na(value))) {
stopf("Coercing environment variable %s=%s to %s would result in missing values for option %s: %s", sQuote(env), sQuote(env_value), sQuote(mode), sQuote(name), commaq(value))
}
}
if (is.numeric(value)) {
if ("non-positive" %in% disallow) {
if (any(value <= 0, na.rm = TRUE)) {
stopf("Environment variable %s=%s specifies a non-positive value for option %s: %s", sQuote(env), sQuote(env_value), sQuote(name), commaq(value))
}
}
if ("negative" %in% disallow) {
if (any(value < 0, na.rm = TRUE)) {
stopf("Environment variable %s=%s specifies a negative value for option %s: %s", sQuote(env), sQuote(env_value), sQuote(name), commaq(value))
}
}
}
}
if (debug) {
mdebugf("=> options(%s = %s) [n=%d, mode=%s]",
dQuote(name), commaq(value),
length(value), storage.mode(value))
}
setOption(name, value)
getOption(name, default = default)
}
## Set package options based on environment variables
update_package_options <- function(debug = FALSE) {
## WARNING: All but R option 'globals.debug' are internal options
## that may be changed or removed at anytime.
update_package_option("globals.globalsOf.locals", mode = "logical", debug = debug)
update_package_option("globals.selfassign", mode = "logical", debug = debug)
update_package_option("globals.walkAST.onUnknownType", debug = debug)
}
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