[setup-r-dependencies]: install quarto if needed

setup-r-dependencies/README.md

@@ -32,7 +32,11 @@ Inputs available
 - `extra-packages` - One or more extra package references to install.
   Separate each reference by newlines or commas for more than one package.
 - `install-pandoc` - Whether to install pandoc. By default it is installed
-  if it is not already on the PATH and the R package depends in rmarkdown.
+  if it is not already on the PATH and the R package depends on rmarkdown.
+- `install-quarto` - Whether to install quarto. If it is 'auto' (the
+  default), it is installed if there is at least one `.qmd` file in the
+  repository, inside `working-directory`. Set to 'true' to always install
+  it. Set to 'false' to never install it.
 - `needs` - `Config/Needs` fields to install from the DESCRIPTION, the
   `Config/Needs/` prefix will be automatically included.
 - `lockfile-create-lib` - The package library to consider when creating
@@ -44,11 +48,15 @@ Inputs available
   install. The default installs the dependencies of the package in the
   working directory and the sessioninfo package. Separate multiple packages
   by newlines or commas.
-- `pak-version`: Which pak version to use. Possible values are
+- `pak-version` - Which pak version to use. Possible values are
   `stable`, `rc` and `devel`. Defaults to `stable`.
-- `pandoc-version`: Which pandoc version to install (see the
+- `pandoc-version` - Which pandoc version to install (see the
   `r-lib/actions/setup-pandoc` action), if pandoc is installed.
-- `upgrade`: Whether to install the latest available versions of the
+- `quarto-version` - Version of quarto to install, if quarto is installed.
+  It is passed to the `quarto-dev/quarto-actions/setup@v2` action. The
+  default is 'release' to install the latest release. Other possible values
+  are a version number number (without the `v` prefix), and 'pre-release'.
+- `upgrade` - Whether to install the latest available versions of the
   dependencies. Must be an R expression. See the README for details if
   you need quoting. Defaults to `FALSE`.
 - `working-directory` - default `'.'`. If the DESCRIPTION file is not in the

setup-r-dependencies/action.yaml

@@ -38,6 +38,20 @@ s.'
   pandoc-version:
     description: 'Pandoc version to install.'
     default: '3.1.11'
+  install-quarto:
+    description: |
+      Whether to install quarto. If it is 'auto' (the default), it is
+      installed if there is at least one `.qmd` file in the repository,
+      inside `working-directory`. Set to 'true' to always install it.
+      Set to 'false' to never install it.
+    default: 'auto'
+  quarto-version:
+    description: |
+      Version of quarto to install, if quarto is installed. It is passed
+      to the `quarto-dev/quarto-actions/setup@v2` action. The default is
+      'release' to install the latest release. Other possible values are
+      a version number number (without the `v` prefix), and 'pre-release'.
+    default: 'release'
 runs:
   using: "composite"
   steps:
@@ -183,6 +197,26 @@ runs:
         with:
           pandoc-version: ${{ inputs.pandoc-version }}
 
+      - name: Check whether quarto if needed
+        id: check-quarto
+        run: |
+          cat("::group::Check if package needs quarto\n")
+          if (length(dir(recursive = TRUE, pattern = "[.]qmd$")) > 0) {
+            o <- "true"
+          } else {
+            o <- "false"
+          }
+          cat("install=", o, "\n", file = Sys.getenv("GITHUB_OUTPUT"), sep = "", append = TRUE)
+          cat("::endgroup::\n")
+        shell: Rscript {0}
+        working-directory: R{{ inputs.working-directory }}
+
+      - name: Install quarto if needed
+        if: ${{ steps.check-quarto.outputs.install == 'true' }}
+        uses: quarto-dev/quarto-actions/setup@v2
+        with:
+          version: ${{ inputs.quarto-version }}
+
       - name: Session info
         run: |
           # Session info