254 lines
7.1 KiB
R
254 lines
7.1 KiB
R
#### Essential functionality needed by ESS
|
|
|
|
## Should work on *all* vesions of R.
|
|
## Do not use _ in names, nor :: , nor 1L etc, as they
|
|
## cannot be parsed in old R versions
|
|
|
|
.ess.getRversion <- function() {
|
|
if(exists("getRversion", mode="function")) getRversion()
|
|
else paste(R.version$major, R.version$minor, sep=".")
|
|
}
|
|
|
|
## loading ESSR.rda might fail, so re-assign here:
|
|
.ess.Rversion <- .ess.getRversion()
|
|
|
|
.ess.R.has.utils <- (.ess.Rversion >= "1.9.0")
|
|
.ess.utils.name <- paste("package",
|
|
if(.ess.Rversion >= "1.9.0") "utils" else "base",
|
|
sep = ":")
|
|
|
|
## Instead of modern utils::help use one that works in R 1.0.0:
|
|
.ess.findFUN <- get("find", .ess.utils.name)
|
|
|
|
|
|
### HELP
|
|
.ess.help <- function(..., help.type = getOption("help_type")) {
|
|
if (is.null(help.type)) {
|
|
help.type <- "text"
|
|
}
|
|
|
|
## - get("help", ..) searching in global env works with devtools redefines
|
|
## - Redefining to .ess.help this way is necessary because
|
|
## utils:::print.help_files_with_topic (used internally when there's
|
|
## more than one a package) uses the quoted call
|
|
## MM: don't understand; more specifically?
|
|
.ess.help <- function(...) {
|
|
do.call(get("help", envir = .GlobalEnv), list(...))
|
|
}
|
|
|
|
if (.ess.Rversion > "2.10") {
|
|
## Abbreviating help_type to avoid underscore
|
|
.ess.help(..., help = help.type)
|
|
} else {
|
|
.ess.help(..., htmlhelp = help.type == "html")
|
|
}
|
|
}
|
|
|
|
.ess.getHelpAliases <- local({
|
|
readrds <- if (.ess.Rversion >= '2.13.0') readRDS else .readRDS
|
|
aliasesCache <- new.env()
|
|
|
|
getAliases <- function(file) {
|
|
cached <- aliasesCache[[file]]
|
|
if (!is.null(cached))
|
|
return(cached)
|
|
|
|
aliases <- tryCatch(
|
|
error = function(...) NULL,
|
|
if (file.exists(file))
|
|
names(readrds(file))
|
|
else
|
|
NULL
|
|
)
|
|
|
|
aliasesCache[[file]] <- aliases
|
|
aliases
|
|
}
|
|
|
|
function(reset = FALSE) {
|
|
if (reset)
|
|
aliasesCache <<- new.env()
|
|
|
|
rdsFiles <- paste(searchpaths(), "/help/aliases.rds", sep = "")
|
|
unlist(lapply(rdsFiles, getAliases), use.names = FALSE)
|
|
}
|
|
})
|
|
|
|
.ess.helpLinks <- function(topic, package) {
|
|
tryCatch(
|
|
warning = function(...) NULL,
|
|
error = function(...) NULL,
|
|
{
|
|
ast <- .ess.fetchParsedRd(topic, package)
|
|
.ess.findLinks(ast)
|
|
}
|
|
)
|
|
}
|
|
|
|
.ess.fetchParsedRd <- function(topic, package) {
|
|
path <- utils:::index.search(topic, find.package(package))
|
|
utils:::.getHelpFile(path)
|
|
}
|
|
|
|
.ess.findLinks <- function(x) {
|
|
links <- NULL
|
|
findLinksRec <- function(x) {
|
|
if (.ess.isRdLink(x)) {
|
|
## Ignore `pkg` for now
|
|
links <<- c(links, .ess.getRdLink(x)[[2]])
|
|
} else if (is.list(x)) {
|
|
for (elt in x)
|
|
findLinksRec(elt)
|
|
}
|
|
}
|
|
|
|
findLinksRec(x)
|
|
links
|
|
}
|
|
|
|
.ess.isRdLink <- function(x) {
|
|
identical(attr(x, "Rd_tag"), "\\link")
|
|
}
|
|
|
|
## From `tools:::get_link()`
|
|
.ess.getRdLink <- function(x) {
|
|
pkg <- ""
|
|
dest <- paste(unlist(x), collapse = "")
|
|
|
|
opt <- attr(x, "Rd_option")
|
|
if (!is.null(opt)) {
|
|
if (grepl("^=", opt, perl = TRUE, useBytes = TRUE)) {
|
|
dest <- sub("^=", "", opt)
|
|
} else if (grepl(":", opt, perl = TRUE, useBytes = TRUE)) {
|
|
dest <- sub("^[^:]*:", "", opt)
|
|
pkg <- sub(":.*", "", opt)
|
|
} else {
|
|
pkg <- as.character(opt)
|
|
}
|
|
}
|
|
|
|
c(pkg, dest)
|
|
}
|
|
|
|
### SOURCING
|
|
.ess.eval <- function(string, visibly = TRUE, output = FALSE,
|
|
max.deparse.length = 300,
|
|
file = tempfile("ESS"), local = NULL)
|
|
{
|
|
if (is.null(local)) {
|
|
local <- if (.ess.Rversion > '2.13') parent.frame() else FALSE
|
|
}
|
|
|
|
## create FILE, put string into it. Then source.
|
|
## arguments are like in source and .ess.source
|
|
cat(string, file = file)
|
|
## The following on.exit infloops in R 3.3.0
|
|
## https://github.com/emacs-ess/ESS/issues/334
|
|
## https://bugs.r-project.org/bugzilla/show_bug.cgi?id=16971
|
|
## So we are cleanning it in .ess.source instead.
|
|
## on.exit(file.remove(file))
|
|
.ess.source(file, visibly = visibly, output = output,
|
|
max.deparse.length = max.deparse.length,
|
|
local = local, fake.source = TRUE)
|
|
}
|
|
|
|
.ess.strip.error <- function(msg, srcfile) {
|
|
pattern <- paste0(srcfile, ":[0-9]+:[0-9]+: ")
|
|
sub(pattern, "", msg)
|
|
}
|
|
|
|
.ess.file.remove <- function(file){
|
|
if (base::file.exists(file)) base::file.remove(file)
|
|
else FALSE
|
|
}
|
|
|
|
.ess.source <- function(file, visibly = TRUE, output = FALSE,
|
|
max.deparse.length = 300, local = NULL,
|
|
fake.source = FALSE, keep.source = TRUE,
|
|
message.prefix = "") {
|
|
if (is.null(local)) {
|
|
local <- if (.ess.Rversion > "2.13")
|
|
parent.frame()
|
|
else FALSE
|
|
}
|
|
|
|
ss <-
|
|
if (.ess.Rversion >= "3.4")
|
|
base::source
|
|
else if (.ess.Rversion >= "2.8")
|
|
function(..., spaced) base::source(...)
|
|
else function(..., spaced, keep.source) base::source(...)
|
|
|
|
on.exit({
|
|
if (fake.source)
|
|
.ess.file.remove(file)
|
|
})
|
|
|
|
out <- ss(file, echo = visibly, local = local, print.eval = output, spaced = FALSE,
|
|
max.deparse.length = max.deparse.length, keep.source = keep.source)
|
|
|
|
if(!fake.source)
|
|
cat(sprintf("%sSourced file %s\n", message.prefix, file))
|
|
|
|
## Return value for org-babel
|
|
invisible(out$value)
|
|
}
|
|
|
|
if(.ess.Rversion < "1.8")
|
|
## (works for "1.7.2"): bquote() was new in 1.8.0
|
|
bquote <- function(expr, where=parent.frame()){
|
|
unquote <- function(e)
|
|
if (is.pairlist(e)) as.pairlist(lapply(e, unquote))
|
|
else if (length(e) <= 1) e
|
|
else if (e[[1]] == as.name(".")) eval(e[[2]], where)
|
|
else as.call(lapply(e, unquote))
|
|
|
|
unquote(substitute(expr))
|
|
}
|
|
|
|
.ess.command <- function(expr, sentinel) {
|
|
## It is possible that the REPL is marked as non-busy when the
|
|
## output is sinked because prompts are not sinked. In that case,
|
|
## redirect the sinked output temporarily to ESS.
|
|
sinked <- !identical(stdout(), getConnection(1))
|
|
if (sinked)
|
|
sink(getConnection(1))
|
|
|
|
on.exit({
|
|
writeLines(paste0(sentinel, "-END"))
|
|
if (sinked)
|
|
sink(NULL)
|
|
})
|
|
|
|
writeLines(paste0(sentinel, "-START"))
|
|
|
|
.ess.environment.state$env <- parent.frame()
|
|
on.exit(.ess.environment.state$env <- NULL, add = TRUE)
|
|
|
|
|
|
## Don't interrupt `browser()` sessions (#1081)
|
|
restart <- function(...) {
|
|
if (!is.null(findRestart("browser")))
|
|
invokeRestart("browser")
|
|
}
|
|
|
|
out <- withCallingHandlers(
|
|
interrupt = restart,
|
|
withVisible(expr)
|
|
)
|
|
|
|
## Print result manually because we can't rely on auto-print
|
|
## without changing the last value
|
|
if (out$visible)
|
|
print(out$value)
|
|
|
|
## Keep `.Last.value` stable
|
|
invisible(.Last.value)
|
|
}
|
|
|
|
.ess.environment.state <- new.env(parent = emptyenv())
|
|
|
|
.ess.environment <- function() {
|
|
.ess.environment.state$env
|
|
}
|