use R.cache >= 0.15.0 and avoid the prompt

DESCRIPTION

@@ -21,7 +21,7 @@ Imports:
     cli (>= 1.1.0),
     magrittr (>= 2.0.0),
     purrr (>= 0.2.3),
-    R.cache (>= 0.14.0),
+    R.cache (>= 0.15.0),
     rematch2 (>= 2.0.1),
     rlang (>= 0.1.1),
     rprojroot (>= 1.1),

NEWS.md

@@ -68,6 +68,9 @@
 * `exclude_dirs` in `style_pkg()` is now properly respected if it is a 
   sub-directory of a directory that is scheduled for styling (e.g. 
   `test/testthat/some/dir`) (#811).
+* the user is not prompted anymore to confirm the creation of a permanent cache 
+  as R.cache >= 0.15.0 uses a standard location in line with CRAN policies 
+  (#819).
 * R code chunks in nested non-R chunks in R markdown don't yield an error 
   anymore when document is styled, chunks are still not styled (#788, #794).
 * `cache_activate()` and `cache_deactivate()` now respect the R 

R/ui-caching.R

@@ -32,27 +32,10 @@ cache_clear <- function(cache_name = NULL, ask = TRUE) {
 #' Since we leverage `{R.cache}` to manage the cache, you can also use any
 #' `{R.cache}` functionality to manipulate it.
 #'
-#' @section Interactive setup:
-#'  `{styler}` by default uses caching via the `{R.cache}` package. When interacting
-#' with `{styler}`, you will be asked to let it create a permanent cache on your
-#' file system that styler will use in case it is not set already up for another
-#' tool that uses `{R.cache}`. We encourage users to let `{R.cache}` create a
-#' permanent directory for caching because, otherwise, the cache is lost at
-#' restart of R.
-#'
-#' @section Non-interactive setup:
-#' In some cases, you want to avoid the interactive prompt described above. In
+#' In some cases, you want to use a non-standard cache location. In
 #' that situation, you can set the path to the cache with the R option
 #' `R.cache.rootPath` or the environment variable `R_CACHE_ROOTPATH` to an
-#' existent path before you call the styler API. This should avoid the prompt.
-#' `R.cache::setCacheRootPath("/path/to/cache")` is also programmatic but will
-#' probably give the prompt anyways if called interactively.
-#'
-#' @section Non-interactive use:
-#' Note that if you have never authorized `{R.cache}` to create the cache in a
-#' permanent directory and you use `{styler}` non-interactively, it will build the
-#' cache in a temporary directory. To create a permanent cache, follow the
-#' section 'Non-interactive setup' or 'Interactive setup' above.
+#' existent path before you call the styler API.
 #'
 #' @section Invalidation:
 #' The cache is specific to a version of styler by default, because different
@@ -67,8 +50,7 @@ cache_clear <- function(cache_name = NULL, ask = TRUE) {
 #' @section Using a cache for styler in CI/CD:
 #' If you want to set up caching in a CI/CD pipeline, we suggest to set the
 #' `{R.cache}` root path to a directory for which you have the cache enabled as
-#' described above in the section 'Non-interactive setup'. This can often be set
-#' in config files of CI/CD tools, e.g. see the
+#' This can often be set in config files of CI/CD tools, e.g. see the
 #' [Travis documentation on caching](https://docs.travis-ci.com/user/caching).
 #'
 #' @name caching