Add a handler to improve YAML error message #736

	on:
	push:
	branches:
	- main
	- master
	pull_request:
	branches:
	- main
	- master
	workflow_dispatch:

	name: Check knitr examples

	jobs:
	run-examples:
	runs-on: ${{ matrix.config.os }}

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

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

	env:
	R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
	DISPLAY: ':99.0'
	RGL_USE_NULL: TRUE
	GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}

	steps:
	- uses: actions/checkout@v3

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

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

	- uses: r-lib/actions/setup-tinytex@v2-branch
	env:
	# install full prebuilt version
	TINYTEX_INSTALLER: TinyTeX

	- uses: r-lib/actions/setup-r-dependencies@v2
	with:
	packages: deps::.
	extra-packages: XML

	- name: Retrieve knitr-examples
	# On PR, it will checkout same branch if it exists there
	uses: ./.github/actions/checkout-knitr-examples

	- name: Install knitr-example dev
	run: pak::pak(readLines("knitr-examples/R-packages"))
	shell: Rscript {0}

	- name: Install system dependencies
	if: runner.os == 'Linux'
	run: \|
	sudo apt-get install -y libpoppler-cpp-dev graphviz asymptote highlight coffeescript scala optipng ghostscript

	- name: Install CTAN dependencies
	run: \|
	tinytex::tlmgr_install("dvisvgm")
	shell: Rscript {0}

	- name: Check knitr-examples
	run: \|
	rm knitr-examples/cache -rf
	make integration
	shell: bash

	- uses: actions/upload-artifact@v2
	if: failure()
	with:
	name: knitr-examples
	path:
	knitr-examples/[0-9][0-9][0-9]-.
	retention-days: 7

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