Assist with Quarto vignettes and articles (#2085)

* Get use_vignette() working for qmd

* Another test

* Attempt to get "or" between 2 .vals

Approach taken from r-lib/cli#681 (comment)

* Catch up on the article side

* Add NEWS bullet

* Remove comment

Author: jennybc

NEWS.md

@@ -1,11 +1,14 @@
 # usethis (development version)
 
+* `use_vignette()` and `use_article()` now support Quarto. The `name` of the new
+  vignette or article can optionally include a file extension to signal whether
+  `.Rmd` or `.qmd` is desired, with `.Rmd` remaining the default for now. Thanks
+  to @olivroy for getting the ball rolling (#1997).
+
 * `use_tidy_upkeep_issue()` now records the year it is being run in the
   `Config/usethis/upkeep` field in DESCRIPTION. If this value exists it is
   furthermore used to filter the checklist when making the issue.
 
-## Bug fixes and minor improvements
-
 * `use_package()` now decreases a package minimum version required when
   `min_version` is lower than what is currently specified in the DESCRIPTION
   file (@jplecavalier, #1957).

R/vignette.R

@@ -10,43 +10,85 @@
 #' * Adds `inst/doc` to `.gitignore` so built vignettes aren't tracked.
 #' * Adds `vignettes/*.html` and `vignettes/*.R` to `.gitignore` so
 #'   you never accidentally track rendered vignettes.
-#' @param name Base for file name to use for new vignette. Should consist only
-#'   of numbers, letters, `_` and `-`. Lower case is recommended.
-#' @param title The title of the vignette.
-#' @seealso The [vignettes chapter](https://r-pkgs.org/vignettes.html) of
-#'   [R Packages](https://r-pkgs.org).
+#' * For `*.qmd`, adds Quarto-related patterns to `.gitignore` and
+#'   `.Rbuildignore`.
+#' @param name File name to use for new vignette. Should consist only of
+#'   numbers, letters, `_` and `-`. Lower case is recommended. Can include the
+#'   `".Rmd"` or `".qmd"` file extension, which also dictates whether to place
+#'   an R Markdown or Quarto vignette. R Markdown (`".Rmd"`) is the current
+#'   default, but it is anticipated that Quarto (`".qmd"`) will become the
+#'   default in the future.
+#' @param title The title of the vignette. If not provided, a title is generated
+#'   from `name`.
+#' @seealso
+#' * The [vignettes chapter](https://r-pkgs.org/vignettes.html) of
+#'   [R Packages](https://r-pkgs.org)
+#' * The pkgdown vignette on Quarto:
+#'   `vignette("quarto", package = "pkgdown")`
+#' * The quarto (as in the R package) vignette on HTML vignettes:
+#'   `vignette("hello", package = "quarto")`
 #' @export
 #' @examples
 #' \dontrun{
 #' use_vignette("how-to-do-stuff", "How to do stuff")
+#' use_vignette("r-markdown-is-classic.Rmd", "R Markdown is classic")
+#' use_vignette("quarto-is-cool.qmd", "Quarto is cool")
 #' }
-use_vignette <- function(name, title = name) {
+use_vignette <- function(name, title = NULL) {
   check_is_package("use_vignette()")
   check_required(name)
+  maybe_name(title)
+
+  ext <- get_vignette_extension(name)
+  if (ext == "qmd") {
+    check_installed("quarto")
+    check_installed("pkgdown", version = "2.1.0")
+  }
+
+  name <- path_ext_remove(name)
   check_vignette_name(name)
+  title <- title %||% name
 
   use_dependency("knitr", "Suggests")
-  use_dependency("rmarkdown", "Suggests")
-
-  proj_desc_field_update("VignetteBuilder", "knitr", overwrite = TRUE)
   use_git_ignore("inst/doc")
 
-  use_vignette_template("vignette.Rmd", name, title)
+  if (tolower(ext) == "rmd") {
+    use_dependency("rmarkdown", "Suggests")
+    proj_desc_field_update("VignetteBuilder", "knitr", overwrite = TRUE, append = TRUE)
+    use_vignette_template("vignette.Rmd", name, title)
+  } else {
+    use_dependency("quarto", "Suggests")
+    proj_desc_field_update("VignetteBuilder", "quarto", overwrite = TRUE, append = TRUE)
+    use_vignette_template("vignette.qmd", name, title)
+  }
 
   invisible()
 }
 
 #' @export
 #' @rdname use_vignette
-use_article <- function(name, title = name) {
+use_article <- function(name, title = NULL) {
   check_is_package("use_article()")
+  check_required(name)
+  maybe_name(title)
 
-  deps <- proj_deps()
-  if (!"rmarkdown" %in% deps$package) {
-    proj_desc_field_update("Config/Needs/website", "rmarkdown", append = TRUE)
+  ext <- get_vignette_extension(name)
+  if (ext == "qmd") {
+    check_installed("quarto")
+    check_installed("pkgdown", version = "2.1.0")
   }
 
-  use_vignette_template("article.Rmd", name, title, subdir = "articles")
+  name <- path_ext_remove(name)
+  title <- title %||% name
+
+  if (tolower(ext) == "rmd") {
+    proj_desc_field_update("Config/Needs/website", "rmarkdown", overwrite = TRUE, append = TRUE)
+    use_vignette_template("article.Rmd", name, title, subdir = "articles")
+  } else {
+    use_dependency("quarto", "Suggests")
+    proj_desc_field_update("Config/Needs/website", "quarto", overwrite = TRUE, append = TRUE)
+    use_vignette_template("article.qmd", name, title, subdir = "articles")
+  }
   use_build_ignore("vignettes/articles")
 
   invisible()
@@ -58,18 +100,26 @@ use_vignette_template <- function(template, name, title, subdir = NULL) {
   check_name(title)
   maybe_name(subdir)
 
-  use_directory("vignettes")
-  if (!is.null(subdir)) {
-    use_directory(path("vignettes", subdir))
-  }
-  use_git_ignore(c("*.html", "*.R"), directory = "vignettes")
+  ext <- get_vignette_extension(template)
 
   if (is.null(subdir)) {
-    path <- path("vignettes", asciify(name), ext = "Rmd")
+    target_dir <- "vignettes"
   } else {
-    path <- path("vignettes", subdir, asciify(name), ext = "Rmd")
+    target_dir <- path("vignettes", subdir)
+  }
+
+  use_directory(target_dir)
+
+  use_git_ignore(c("*.html", "*.R"), directory = target_dir)
+  if (ext == "qmd") {
+    use_git_ignore("**/.quarto/")
+    use_git_ignore("*_files", target_dir)
+    use_build_ignore(path(target_dir, ".quarto"))
+    use_build_ignore(path(target_dir, "*_files"))
   }
 
+  path <- path(target_dir, asciify(name), ext = ext)
+
   data <- list(
     Package = project_name(),
     vignette_title = title,
@@ -102,3 +152,28 @@ check_vignette_name <- function(name) {
 valid_vignette_name <- function(x) {
   grepl("^[[:alpha:]][[:alnum:]_-]*$", x)
 }
+
+check_vignette_extension <- function(ext) {
+  # Quietly accept "rmd" here, tho we'll always write ".Rmd" in such a filepath
+  if (! ext %in% c("Rmd", "rmd", "qmd")) {
+    valid_exts_cli <- cli::cli_vec(
+      c("Rmd", "qmd"),
+      style = list("vec-sep2" = " or ")
+    )
+    ui_abort(c(
+      "Unsupported file extension: {.val {ext}}",
+      "usethis can only create a vignette or article with one of these
+       extensions: {.val {valid_exts_cli}}."
+    ))
+  }
+}
+
+get_vignette_extension <- function(name) {
+  ext <- path_ext(name)
+  if (nzchar(ext)) {
+    check_vignette_extension(ext)
+  } else {
+    ext <- "Rmd"
+  }
+  ext
+}

inst/templates/article.qmd

@@ -0,0 +1,12 @@
+---
+title: "{{{ vignette_title }}}"
+knitr:
+  opts_chunk:
+    collapse: true
+    comment: '#>'
+---
+
+```{r}
+#| label: setup
+library({{Package}})
+```

inst/templates/vignette.qmd

@@ -0,0 +1,16 @@
+---
+title: "{{{ vignette_title }}}"
+vignette: >
+  %\VignetteIndexEntry{{{ braced_vignette_title }}}
+  %\VignetteEngine{quarto::html}
+  %\VignetteEncoding{UTF-8}
+knitr:
+  opts_chunk:
+    collapse: true
+    comment: '#>'
+---
+
+```{r}
+#| label: setup
+library({{Package}})
+```

man/use_vignette.Rd

@@ -13,3 +13,12 @@
       i Start with a letter.
       i Contain only letters, numbers, '_', and '-'.
 
+# we error informatively for bad vignette extension
+
+    Code
+      check_vignette_extension("Rnw")
+    Condition
+      Error in `check_vignette_extension()`:
+      x Unsupported file extension: "Rnw"
+      i usethis can only create a vignette or article with one of these extensions: "Rmd" or "qmd".
+

tests/testthat/_snaps/vignette.md

@@ -15,7 +15,7 @@ test_that("use_vignette() gives useful errors", {
   })
 })
 
-test_that("use_vignette() does the promised setup", {
+test_that("use_vignette() does the promised setup, Rmd", {
   create_local_package()
 
   use_vignette("name", "title")
@@ -32,32 +32,90 @@ test_that("use_vignette() does the promised setup", {
   expect_identical(proj_desc()$get_field("VignetteBuilder"), "knitr")
 })
 
-# use_article -------------------------------------------------------------
+test_that("use_vignette() does the promised setup, qmd", {
+  create_local_package()
+  local_check_installed()
+
+  use_vignette("name.qmd", "title")
+  expect_proj_file("vignettes/name.qmd")
+
+  ignores <- read_utf8(proj_path(".gitignore"))
+  expect_true("inst/doc" %in% ignores)
+
+  deps <- proj_deps()
+  expect_true(
+    all(c("knitr", "quarto") %in% deps$package[deps$type == "Suggests"])
+  )
+
+  expect_identical(proj_desc()$get_field("VignetteBuilder"), "quarto")
+})
 
-test_that("use_article goes in article subdirectory", {
+test_that("use_vignette() does the promised setup, mix of Rmd and qmd", {
   create_local_package()
+  local_check_installed()
+
+  use_vignette("older-vignette", "older Rmd vignette")
+  use_vignette("newer-vignette.qmd", "newer qmd vignette")
+  expect_proj_file("vignettes/older-vignette.Rmd")
+  expect_proj_file("vignettes/newer-vignette.qmd")
+
+  deps <- proj_deps()
+  expect_true(
+    all(c("knitr", "quarto", "rmarkdown") %in% deps$package[deps$type == "Suggests"])
+  )
 
-  use_article("test")
-  expect_proj_file("vignettes/articles/test.Rmd")
+  vignette_builder <- proj_desc()$get_field("VignetteBuilder")
+  expect_match(vignette_builder, "knitr", fixed = TRUE)
+  expect_match(vignette_builder, "quarto", fixed = TRUE)
 })
 
-test_that("use_article() adds rmarkdown to Config/Needs/website", {
+# use_article -------------------------------------------------------------
+test_that("use_article() does the promised setup, Rmd", {
   create_local_package()
   local_interactive(FALSE)
 
-  proj_desc_field_update("Config/Needs/website", "somepackage", append = TRUE)
+  # Let's have another package already in Config/Needs/website
+  proj_desc_field_update("Config/Needs/website", "somepackage")
   use_article("name", "title")
 
+  expect_proj_file("vignettes/articles/name.Rmd")
+
   expect_setequal(
     proj_desc()$get_list("Config/Needs/website"),
     c("rmarkdown", "somepackage")
   )
 })
 
+# Note that qmd articles seem to cause problems for build_site() rn
+# https://github.com/r-lib/pkgdown/issues/2821
+test_that("use_article() does the promised setup, qmd", {
+  create_local_package()
+  local_check_installed()
+  local_interactive(FALSE)
+
+  # Let's have another package already in Config/Needs/website
+  proj_desc_field_update("Config/Needs/website", "somepackage")
+  use_article("name.qmd", "title")
+
+  expect_proj_file("vignettes/articles/name.qmd")
+
+  expect_setequal(
+    proj_desc()$get_list("Config/Needs/website"),
+    c("quarto", "somepackage")
+  )
+})
+
 # helpers -----------------------------------------------------------------
 
 test_that("valid_vignette_name() works", {
   expect_true(valid_vignette_name("perfectly-valid-name"))
   expect_false(valid_vignette_name("01-test"))
   expect_false(valid_vignette_name("test.1"))
 })
+
+test_that("we error informatively for bad vignette extension", {
+  expect_snapshot(
+    error = TRUE,
+    check_vignette_extension("Rnw")
+  )
+})