Do not memcpy from empty source #261

	name: Build

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

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Node
	uses: actions/setup-node@v3
	with:
	node-version: '18'
	- name: Install dependencies
	run: npm install
	- name: Generate parser
	run: npm run generate
	- name: Verify that generated parser matches the repository
	run: \|
	diff=`git diff HEAD -- src`
	echo "$diff"
	test -z "$diff"
	- name: Check the parser size
	run: \|
	size_kib="$(du -sk src/parser.c \| cut -f1)"
	size_mib="$((size_kib / 1024))"
	max_size_mib=35

	echo "The parser is now at $size_mib MiB"
	if [ "$size_mib" -gt "$max_size_mib" ]; then
	echo "This is greater than the maximum size of $max_size_mib MiB!"
	exit 1
	fi
	shell: bash
	- name: Run tests
	run: npm test
	- name: Set up Rust
	uses: dtolnay/rust-toolchain@stable
	- name: Build and test crate
	run: cargo test

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