replace enc with xfun

Substituting enc's read and write functionality with xfun and re-implement enc::transform_lines_enc() in R/io.R

DESCRIPTION

@@ -12,15 +12,15 @@ BugReports: https://github.com/r-lib/styler/issues
 Imports: 
     backports,
     cli,
-    enc (>= 0.2),
     magrittr,
     purrr (>= 0.2.3),
     rematch2,
     rlang,
     rprojroot,
     tibble (>= 1.4.2),
     tools,
-    withr
+    withr,
+    xfun
 Suggests: 
     data.tree,
     dplyr,
@@ -44,6 +44,7 @@ Collate:
     'expr-is.R'
     'indent.R'
     'initialize.R'
+    'io.R'
     'nest.R'
     'nested-to-tree.R'
     'parse.R'

NAMESPACE

@@ -14,6 +14,7 @@ export(tidyverse_reindention)
 export(tidyverse_style)
 import(tibble)
 importFrom(magrittr,"%>%")
+importFrom(magrittr,set_names)
 importFrom(purrr,as_mapper)
 importFrom(purrr,compact)
 importFrom(purrr,flatten)

R/io.R

@@ -0,0 +1,27 @@
+#' Apply a function to the contents of a file
+#'
+#' Transforms a file with a function.
+#' @param path A vector with file paths to transform.
+#' @param fun A function that returns a character vector.
+#' @param write_back Whether or not the results of the transformation should
+#'   be written back to the file.
+#' @importFrom magrittr set_names
+#' @keywords internal
+transform_lines_utf8 <- function(path, fun, write_back = TRUE) {
+  map_lgl(path, transform_lines_utf8_one, fun = fun, write_back = write_back) %>%
+    set_names(path)
+}
+
+transform_lines_utf8_one <- function(path, fun, write_back = write_back) {
+  old <- xfun::read_utf8(path)
+  tryCatch({
+    new <- fun(old)
+    if (write_back) {
+      xfun::write_utf8(new, path)
+    }
+    !identical(unclass(old), unclass(new))
+    }, error = function(e) {
+    warning("When processing ", path, ": ", conditionMessage(e), call. = FALSE)
+    NA
+  })
+}

R/roxygen-examples-find.R

@@ -14,7 +14,7 @@ identify_start_to_stop_of_roxygen_examples_from_text <- function(text) {
 }
 
 identify_start_to_stop_of_roxygen_examples <- function(path) {
-  content <- enc::read_lines_enc(path)
+  content <- xfun::read_utf8(path)
   identify_start_to_stop_of_roxygen_examples_from_text(content)
 }
 

R/testing.R

@@ -102,19 +102,18 @@ transform_and_check <- function(in_item, out_item,
                                 write_tree = NA,
                                 out_tree = "_tree", ...) {
   write_tree <- set_arg_write_tree(write_tree)
-  read_in <- enc::read_lines_enc(in_item)
+  read_in <- xfun::read_utf8(in_item)
   if (write_tree) {
     create_tree(read_in) %>%
       write.table(out_tree, col.names = FALSE, row.names = FALSE, quote = FALSE)
   }
   transformed_text <- read_in %>%
     transformer(...) %>%
     unclass()
-  transformed <- enc::transform_lines_enc(
+  transformed <- transform_lines_utf8(
     out_item,
     function(x) transformed_text,
-    write_back = write_back,
-    verbose = FALSE
+    write_back = write_back
   )
 
   if (transformed) {

R/transform-code.R

@@ -1,24 +1,24 @@
 #' Transform code from R, Rmd or Rnw files
 #'
-#' A wrapper for [enc::transform_lines_enc()] which initiates the styling of
+#' A wrapper which initiates the styling of
 #' either R, Rmd or Rnw files by passing the relevant transformer function for each
 #' case.
 #'
 #' @inheritParams enc::transform_lines_enc
 #' @param ... Further arguments passed to `enc::transform_lines_enc()`.
 #' @keywords internal
-transform_code <- function(path, fun, verbose = FALSE, ...) {
+transform_code <- function(path, fun, ...) {
   if (is_plain_r_file(path)) {
-    enc::transform_lines_enc(path, fun = fun, ..., verbose = verbose)
+    transform_lines_utf8(path, fun = fun, ...)
   } else if (is_rmd_file(path)) {
-    enc::transform_lines_enc(path,
-      fun = partial(transform_mixed, transformer_fun = fun, filetype = "Rmd"), ...,
-      verbose = verbose
+    transform_lines_utf8(path,
+      fun = partial(transform_mixed, transformer_fun = fun, filetype = "Rmd"),
+      ...
     )
   } else if (is_rnw_file(path)) {
-    enc::transform_lines_enc(path,
-      fun = partial(transform_mixed, transformer_fun = fun, filetype = "Rnw"), ...,
-      verbose = verbose
+    transform_lines_utf8(path,
+      fun = partial(transform_mixed, transformer_fun = fun, filetype = "Rnw"),
+      ...
     )
   } else {
     stop(path, " is not an R, Rmd or Rnw file")

R/transform-files.R

@@ -26,19 +26,18 @@ transform_files <- function(files, transformers, include_roxygen_examples) {
 
 #' Transform a file and output a customized message
 #'
-#' Wraps `enc::transform_lines_enc()` and outputs customized messages.
+#' Transforms file contents and outputs customized messages.
 #' @param max_char_path The number of characters of the longest path. Determines
 #'   the indention level of `message_after`.
 #' @param message_before The message to print before the path.
 #' @param message_after The message to print after the path.
 #' @param message_after_if_changed The message to print after `message_after` if
 #'   any file was transformed.
-#' @inheritParams enc::transform_lines_enc
+#' @inheritParams transform_lines_utf8
 #' @param ... Further arguments passed to `enc::transform_lines_enc()`.
 #' @keywords internal
 transform_file <- function(path,
                            fun,
-                           verbose = FALSE,
                            max_char_path,
                            message_before = "",
                            message_after = " [DONE]",
@@ -53,7 +52,7 @@ transform_file <- function(path,
     rep_char(" ", max(0L, n_spaces_before_message_after)),
     append = FALSE
   )
-  changed <- transform_code(path, fun = fun, verbose = verbose, ...)
+  changed <- transform_code(path, fun = fun, ...)
 
   bullet <- ifelse(is.na(changed), "warning", ifelse(changed, "info", "tick"))
 

R/ui.R

@@ -215,10 +215,10 @@ prettify_any <- function(transformers,
 #' @examples
 #' # the following is identical but the former is more convenient:
 #' file <- tempfile("styler", fileext = ".R")
-#' enc::write_lines_enc("1++1", file)
+#' xfun::write_utf8("1++1", file)
 #' style_file(file, style = tidyverse_style, strict = TRUE)
 #' style_file(file, transformers = tidyverse_style(strict = TRUE))
-#' enc::read_lines_enc(file)
+#' xfun::write_utf8(file)
 #' unlink(file)
 #' @family stylers
 #' @export