refs #12442 - generate a fuzzing corpus by extracting code from `testrunner` #2

	# Syntax reference https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions
	# Environment reference https://help.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners
	name: corpus

	on: [pull_request, push]

	permissions:
	contents: read

	jobs:
	corpus:
	runs-on: ubuntu-22.04
	if: ${{ github.repository_owner == 'danmar' }}

	steps:
	- uses: actions/checkout@v4
	with:
	persist-credentials: false

	- name: ccache
	uses: hendrikmuhs/[email protected]
	with:
	key: ${{ github.workflow }}-${{ runner.os }}

	- name: build testrunner
	run: \|
	set -x
	store_dir=$(pwd)/store
	mkdir $store_dir
	export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
	make -j$(nproc) -s CXXFLAGS="-w -DSTORE_INPUT_DIR=$store_dir"

	- name: run testrunner
	run: \|
	store_dir=$(pwd)/store
	./testrunner

	# TODO: dedup

	- uses: actions/upload-artifact@v4
	if: success()
	with:
	name: corpus
	path: ./store

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