Use file-level expressions and avoid slow loop for whitespace_linter() for up to 50% speedup #777

	# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
	# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
	#
	# NOTE: This workflow only directly installs "hard" dependencies, i.e. Depends,
	# Imports, and LinkingTo dependencies. Notably, Suggests dependencies are never
	# installed, with the exception of testthat, knitr, and rmarkdown. The cache is
	# never used to avoid accidentally restoring a cache containing a suggested
	# dependency.
	#
	# Customization for `{lintr}`
	#
	# The following soft dependencies are not optional for testing:
	# `{patrick}`, `{rex}`, `{withr}`
	on:
	push:
	branches: [main, master]
	pull_request:
	branches: [main, master]

	name: R-CMD-check-hard

	jobs:
	R-CMD-check:
	runs-on: ${{ matrix.config.os }}

	name: ${{ matrix.config.os }} (${{ matrix.config.r }})

	strategy:
	fail-fast: false
	matrix:
	config:
	- { os: ubuntu-latest, r: "release" }

	env:
	GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
	R_KEEP_PKG_SOURCE: yes

	steps:
	- uses: actions/checkout@v3

	- uses: r-lib/actions/setup-pandoc@v2

	- uses: r-lib/actions/setup-r@v2
	with:
	r-version: ${{ matrix.config.r }}
	http-user-agent: ${{ matrix.config.http-user-agent }}
	use-public-rspm: true

	- uses: r-lib/actions/setup-r-dependencies@v2
	with:
	pak-version: devel
	dependencies: '"hard"'
	cache: false
	extra-packages: \|
	any::rcmdcheck
	any::testthat
	any::knitr
	any::rmarkdown
	any::patrick
	any::withr
	needs: check

	- uses: r-lib/actions/check-r-package@v2
	with:
	upload-snapshots: true

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