Nothing
## .help.ESS <-
## function (topic, package = NULL, lib.loc = NULL, verbose = getOption("verbose"),
## try.all.packages = getOption("help.try.all.packages"), help_type = getOption("help_type"))
## {
## types <- c("text", "html", "pdf")
## if (!missing(package))
## if (is.name(y <- substitute(package)))
## package <- as.character(y)
## if (missing(topic)) {
## if (!missing(package)) {
## help_type <- if (!length(help_type))
## "text"
## else match.arg(tolower(help_type), types)
## if (interactive() && help_type == "html") {
## if (tools:::httpdPort == 0L)
## tools::startDynamicHelp()
## if (tools:::httpdPort <= 0L)
## return(library(help = package, lib.loc = lib.loc,
## character.only = TRUE))
## browser <- if (.Platform$GUI == "AQUA") {
## function(x, ...) {
## .Internal(aqua.custom.print("help-files",
## x))
## return(invisible(x))
## }
## }
## else getOption("browser")
## browseURL(paste("http://127.0.0.1:", tools:::httpdPort,
## "/library/", package, "/html/00Index.html",
## sep = ""), browser)
## return(invisible())
## }
## else return(library(help = package, lib.loc = lib.loc,
## character.only = TRUE))
## }
## if (!missing(lib.loc))
## return(library(lib.loc = lib.loc))
## topic <- "help"
## package <- "utils"
## lib.loc <- .Library
## }
## ischar <- tryCatch(is.character(topic) && length(topic) ==
## 1L, error = identity)
## if (inherits(ischar, "error"))
## ischar <- FALSE
## if (!ischar) {
## reserved <- c("TRUE", "FALSE", "NULL", "Inf", "NaN",
## "NA", "NA_integer_", "NA_real_", "NA_complex_", "NA_character_")
## stopic <- deparse(substitute(topic))
## if (!is.name(substitute(topic)) && !stopic %in% reserved)
## stop("'topic' should be a name, length-one character vector or reserved word")
## topic <- stopic
## }
## help_type <- if (!length(help_type))
## "text"
## else match.arg(tolower(help_type), types)
## paths <- index.search(topic, find.package(package, lib.loc,
## verbose = verbose))
## tried_all_packages <- FALSE
## if (!length(paths) && is.logical(try.all.packages) && !is.na(try.all.packages) &&
## try.all.packages && missing(package) && missing(lib.loc)) {
## for (lib in .libPaths()) {
## packages <- .packages(TRUE, lib)
## packages <- packages[is.na(match(packages, .packages()))]
## paths <- c(paths, index.search(topic, file.path(lib,
## packages)))
## }
## paths <- paths[paths != ""]
## tried_all_packages <- TRUE
## }
## paths <- unique(paths)
## attributes(paths) <- list(call = match.call(), topic = topic,
## tried_all_packages = tried_all_packages, type = help_type)
## class(paths) <- "help_files_with_topic"
## paths
## }
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