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zzz.R
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zzz.R
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.package <- new.env()
## covr: skip=all
.onLoad <- function(libname, pkgname) {
.package[["version"]] <- utils::packageVersion(pkgname)
.package[["futureCounter"]] <- 0L
update_package_option("future.debug", mode = "logical")
debug <- getOption("future.debug", FALSE)
if (debug) {
envs <- Sys.getenv()
envs <- envs[grep("R_FUTURE_", names(envs), fixed = TRUE)]
envs <- sprintf("- %s=%s", names(envs), sQuote(envs))
mdebug(paste(c("Future-specific environment variables:", envs), collapse = "\n"))
}
## Set future options based on environment variables
update_package_options(debug = debug)
## Does multiprocess resolve to multisession? If so, then
## plan(multiprocess) should initiate the workers.
if (is.na(attr(multiprocess, "init", exact = TRUE))) {
attr(multiprocess, "init") <<- !supportsMulticore()
}
## Initiate the R session UUID, which will also set/update
## .GlobalEnv$.Random.seed.
session_uuid(attributes = FALSE)
## Report on future plan, if set
strategy <- getOption("future.plan")
if (!is.null(strategy)) {
if (debug) {
if (is.character(strategy)) {
mdebugf("Option 'future.plan' = %s", sQuote(strategy))
} else {
mdebugf("Option 'future.plan' of type %s", sQuote(mode(strategy)))
}
}
}
args <- parseCmdArgs()
p <- args$p
if (!is.null(p)) {
if (debug) mdebugf("R command-line argument: -p %s", p)
## Apply
options(mc.cores = p)
## options(Ncpus = p) ## FIXME: Does it make sense? /HB 2016-04-02
## Set 'future.plan' option?
if (!is.null(strategy)) {
if (debug) mdebug(" => 'future.plan' already set.")
} else if (p == 1L) {
if (debug) mdebug(" => options(future.plan = sequential)")
options(future.plan = sequential)
} else {
if (debug) mdebugf(" => options(future.plan = tweak(multisession, workers = %s))", p)
options(future.plan = tweak(multisession, workers = p))
}
}
## Create UUID for this process
id <- session_uuid()
if (debug) {
mdebugf("R process uuid: %s", id)
mdebug("Setting plan('default')")
}
## NOTE: Don't initiate during startup - it might hang / give an error
plan("default", .init = FALSE)
} ## .onLoad()
## covr: skip=all
#' @importFrom utils file_test
.onAttach <- function(libname, pkgname) {
## Source .future.R script, if one exists
sourceFutureStartupScript()
}
sourceFutureStartupScript <- function(default = c(".future.R", "~/.future.R"), debug = getOption("future.debug", FALSE)) {
## Get default from env var?
pathnames <- Sys.getenv("R_FUTURE_STARTUP_SCRIPT")
if (nchar(pathnames) == 0L) {
pathnames <- TRUE
} else {
if (debug) mdebug("R_FUTURE_STARTUP_SCRIPT: ", sQuote(pathnames))
pathnames <- strsplit(pathnames, split = "[:;]", fixed = FALSE)[[1]]
if (identical(toupper(pathnames), "TRUE")) {
pathnames <- TRUE
} else if (identical(toupper(pathnames), "FALSE")) {
pathnames <- FALSE
}
}
## Get default from R option?
pathnames <- getOption("future.startup.script", pathnames)
## BACKWARD COMPATIBILITY
if (is.logical(pathnames)) {
if (debug) mdebug("Option 'future.startup.script': ", paste(pathnames, collapse = ", "))
stop_if_not(length(pathnames) == 1L, !is.na(pathnames))
## Nothing to do?
if (!pathnames) {
if (debug) mdebug("Future startup scripts disabled")
return(character(0L))
}
pathnames <- default
}
stop_if_not(is.character(pathnames), !anyNA(pathnames))
## Nothing to do?
if (length(pathnames) == 0L) {
if (debug) mdebug("No future startup scripts specified")
return(character(0L))
}
if (debug) mdebug("Future startup scripts considered: ", paste(sQuote(pathnames), collapse = ", "))
pathnames <- pathnames[file_test("-f", pathnames)]
## Nothing to do?
if (length(pathnames) == 0L) {
if (debug) mdebug("Future startup scripts found: <none>")
return(character(0L))
}
pathname <- pathnames[1]
if (debug) {
mdebugf("Future startup scripts found: %s", paste(sQuote(pathnames), collapse = ", "))
mdebugf("Future startup script to load: %s", sQuote(pathname))
}
tryCatch({
source(pathname, chdir = FALSE, echo = FALSE, local = FALSE)
}, error = function(ex) {
msg <- sprintf("Failed to source %s file while attaching the future package. Will ignore this error, but please investigate. The error message was: %s", sQuote(pathname), sQuote(ex$message))
if (debug) mdebug(msg)
warning(msg)
})
pathname
} ## sourceFutureStartupScript()