add tracing slides #578

	name: Check Rust slides
	on:
	push:
	paths:
	- slides/**
	workflow_dispatch:

	# Running these checks on GitHub Actions takes 10 minutes. It is a waste of time if the files have not changed.

	jobs:
	# Build job
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout site source
	uses: actions/checkout@v4

	- name: Get changed files
	id: changed-files
	uses: tj-actions/changed-files@v45

	- name: List all changed files
	env:
	ALL_CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
	run: \|
	echo "$ALL_CHANGED_FILES"
	echo "------"
	for file in ${ALL_CHANGED_FILES}; do
	echo "$file was changed"
	done
	CHANGED_FOLDERS=$(perl -E'say join " ", grep { $_ ne "" and not $uniq{$_}++ } map {m{/(examples/[^/]+/[^/]+)}; $1} @ARGV' $ALL_CHANGED_FILES)
	echo "CHANGED_FOLDERS: $CHANGED_FOLDERS"
	echo $CHANGED_FOLDERS > folders.txt
	- name: Check the slides
	run: \|
	CHANGED_FOLDERS=$(cat folders.txt)
	echo "CHANGED_FOLDERS: $CHANGED_FOLDERS"
	cd slides/rust
	# comment out as it takes 10 minutes to run
	# maybe we could improve it by sharing some of the binaries and/or caching
	if [ "$CHANGED_FOLDERS" != "" ]; then
	./check.sh --verbose --cleanup --use-examples --check $CHANGED_FOLDERS
	fi

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