fix and test .onLoad()

NEWS.md

@@ -25,8 +25,10 @@
 
 **Other changes**
 
+* `.onLoad()` method no longer broken with {cli} >= 3.1 (#893).
 * Piped function without brackets `substitute(x %>% y)` don't get `()` added
-  anymore, as this can change outcome of the code (#876).
+  anymore for one level deep (not more yet, see #889), as this can change 
+  outcome of the code (#876).
 * rules that add tokens don't break stylerignore sequences anymore (#891).
 * Add vignette on distributing style guide (#846, #861).
 * Alignment detection respects stylerignore (#850).

R/zzz.R

@@ -21,25 +21,29 @@
 
 ask_to_switch_to_non_default_cache_root <- function(ask = interactive()) {
   if (ask && runif(1) > 0.9 && is.null(getOption("styler.cache_root"))) {
-    cli::cli_inform(paste0(
-      "The R option `styler.cache_root` is not set, which means the cache ",
-      "will get cleaned up after 6 days (and repeated styling will be slower).",
-      " To keep cache files longer, set ",
-      "the option to location within the {{R.cache}} cache where you want to ",
-      "store the cache, e.g. `\"styler-perm\"`.\n\n",
-      "options(styler.cache_root = \"styler-perm\")\n\n",
-      "in your .Rprofile. Note that the cache literally ",
-      "takes zero space on your disk, only the inode, and you can always ",
-      "manually clean up with `styler::cache_clear()`, and if you update the ",
-      "{{styler}} package, the cache is removed in any case. To ignore this ",
-      "message in the future, set the default explictly to \"styler\" with\n\n",
-      "options(styler.cache_root = \"styler\")\n\nin your `.Rprofile`. This ",
-      "message will only be displayed once in a while.\n"
-    ))
+    ask_to_switch_to_non_default_cache_root_impl()
     options(styler.cache_root = "styler")
   }
 }
 
+ask_to_switch_to_non_default_cache_root_impl <- function() {
+  rlang::warn(paste0(
+    "The R option `styler.cache_root` is not set, which means the cache ",
+    "will get cleaned up after 6 days (and repeated styling will be slower).",
+    " To keep cache files longer, set ",
+    "the option to location within the {R.cache} cache where you want to ",
+    "store the cache, e.g. `\"styler-perm\"`.\n\n",
+    "options(styler.cache_root = \"styler-perm\")\n\n",
+    "in your .Rprofile. Note that the cache literally ",
+    "takes zero space on your disk, only the inode, and you can always ",
+    "manually clean up with `styler::cache_clear()`, and if you update the ",
+    "{styler} package, the cache is removed in any case. To ignore this ",
+    "message in the future, set the default explictly to \"styler\" with\n\n",
+    "options(styler.cache_root = \"styler\")\n\nin your `.Rprofile`. This ",
+    "message will only be displayed once in a while.\n"
+  ))
+}
+
 remove_old_cache_files <- function() {
   all_cached <- list.files(
     R.cache::getCachePath(c("styler", styler_version)),

tests/testthat/test-public_api.R

@@ -475,3 +475,19 @@ test_that("Can properly determine style_after_saving", {
     expect_equal(op, FALSE)
   })
 })
+
+test_that("Can display warning on unset styler cache", {
+  withr::local_options(styler.cache_root = NULL)
+  withr::local_seed(7)
+  expect_warning(
+    ask_to_switch_to_non_default_cache_root(ask = TRUE),
+    'options(styler.cache_root = "styler-perm")',
+    fixed = TRUE
+  )
+})
+
+test_that("Can display warning on unset styler cache", {
+  withr::local_options(styler.cache_root = "styler-perm")
+  withr::local_seed(7)
+  expect_silent(ask_to_switch_to_non_default_cache_root(ask = TRUE))
+})