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captures <- function(x, m) {
assert("`x` must be a character", is.character(x))
assert("`m` must be a match object from `regexpr()`",
inherits(m, "integer") &&
all(c("match.length", "capture.start", "capture.length", "capture.names") %in% names(attributes(m))))
starts <- attr(m, "capture.start")
strings <- substring(x, starts, starts + attr(m, "capture.length") - 1L)
res <- data.frame(matrix(strings, ncol = NCOL(starts)), stringsAsFactors = FALSE)
colnames(res) <- auto_name(attr(m, "capture.names"))
res[is.na(m) | m == -1, ] <- NA_character_
res
}
auto_name <- function(names) {
missing <- names == ""
if (all(!missing)) {
return(names)
}
names[missing] <- seq_along(names)[missing]
names
}
is_windows <- function() {
tolower(Sys.info()[["sysname"]]) == "windows"
}
# This is needed to avoid checking the class of fs_path objects in the
# tests.
# @export
compare.fs_path <- function(x, y, ...) {
if (identical(class(y), "character")) {
class(x) <- NULL
}
names(x) <- NULL
names(y) <- NULL
NextMethod("compare")
}
# @export
compare.fs_perms <- function(x, y, ...) {
if (!inherits(y, "fs_perms")) {
y <- as.character(as_fs_perms(y))
x <- as.character(x)
}
NextMethod("compare")
}
nchar <- function(x, type = "chars", allowNA = FALSE, keepNA = NA) {
# keepNA was introduced in R 3.2.1, previous behavior was equivalent to keepNA
# = FALSE
if (getRversion() < "3.2.1") {
if (!identical(keepNA, FALSE)) {
stop("`keepNA` must be `FALSE` for R < 3.2.1", call. = FALSE)
}
return(base::nchar(x, type, allowNA))
}
base::nchar(x, type, allowNA, keepNA)
}
`%||%` <- function(x, y) if (is.null(x)) y else x
# Only use deterministic entries if we are building documentation in pkgdown.
pkgdown_tmp <- function(path) {
if (identical(Sys.getenv("IN_PKGDOWN"), "true")) {
file_temp_push(path)
}
}
# This is adapted from glue::collapse
# https://github.com/tidyverse/glue/blob/cac874724d09d430036d1bdeba77982e953f29a2/R/glue.R#L140-L161
collapse <- function(x, sep = "", width = Inf, last = "") {
if (length(x) == 0) {
return(character())
}
if (any(is.na(x))) {
return(NA_character_)
}
if (nzchar(last) && length(x) > 1) {
res <- collapse(x[seq(1, length(x) - 1)], sep = sep, width = Inf)
return(collapse(paste0(res, last, x[length(x)]), width = width))
}
x <- paste0(x, collapse = sep)
if (width < Inf) {
x_width <- nchar(x, "width", keepNA = FALSE)
too_wide <- x_width > width
if (too_wide) {
x <- paste0(substr(x, 1, width - 3), "...")
}
}
x
}
assert_no_missing <- function(x) {
nme <- as.character(substitute(x))
idx <- which(is.na(x))
if (length(idx) > 0) {
number <- prettyNum(length(idx), big.mark = ",")
remaining_width <- getOption("width") - nchar(number, keepNA = FALSE) - 29
indexes <- collapse(idx, width = remaining_width, sep = ", ", last = " and ")
msg <- sprintf(
"`%s` must not have missing values
* NAs found at %s locations: %s",
nme,
number,
indexes)
stop(fs_error(msg))
}
}
assert <- function(msg, ..., class = "invalid_argument") {
tests <- unlist(list(...))
if (!all(tests)) {
stop(fs_error(msg, class = class))
}
}
fs_error <- function(msg, class = "invalid_argument") {
structure(class = c(class, "fs_error", "error", "condition"), list(message = msg))
}
lengths <- function(x) {
vapply(x, length, integer(1))
}
as_tibble <- function(x) {
if (is_installed("tibble")) {
tibble::as_tibble(x)
} else {
x
}
}
is_installed <- function(pkg) {
isTRUE(requireNamespace(pkg, quietly = TRUE))
}
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