Created
February 10, 2017 16:15
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| path <- "~/Documents/ingest/readxl/inst/extdata/datasets.xlsx" | |
| zip_file <- function(path) { | |
| stopifnot(file.exists(path)) | |
| path <- normalizePath(path) | |
| contents <- utils::unzip(path, list = TRUE) | |
| names(contents) <- c("path", "size", "date") | |
| contents <- contents[contents$size > 0, , drop = FALSE] | |
| contents <- tibble::remove_rownames(tibble::as_tibble(contents)) | |
| structure( | |
| contents, | |
| class = c("zip_file", "tbl_df", "tbl", "data.frame"), | |
| path = path | |
| ) | |
| } | |
| zip_con <- function(zip_file, path = 1L, open = "rb", ...) { | |
| if (is.numeric(path) && length(path) == 1) { | |
| path <- zip_file$path[[path]] | |
| } | |
| if (!is.character(path) || length(path) != 1) { | |
| stop("`path` must be a length one character vector or numeric", call. = FALSE) | |
| } | |
| if (!path %in% zip_file$path) { | |
| stop("`path` ", encodeString(path, quote = "'"), " not found", call. = FALSE) | |
| } | |
| unz(attr(zip_file, "path"), path, open = open, ...) | |
| } |
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