Add in check to see if benchmark has already run #15

	name: Run performance benchmark tests
	permissions:
	pull-requests: write

	on:
	push:
	branches:
	- "main"

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout data-caterer-example repo
	uses: actions/checkout@v4
	with:
	fetch-depth: 2
	- name: Check if benchmark has already run
	run: \|
	version=$(grep dataCatererVersion gradle.properties \| cut -d= -f2)
	if [ ! -f benchmark/results/benchmark_results_${version}.txt ]; then
	echo "No benchmark results for version: $version, starting to run benchmarks"
	else
	echo "Benchmarks already run!"
	exit 1
	fi
	- name: Checkout datafusion-comet repo
	uses: actions/checkout@v4
	with:
	fetch-depth: 2
	repository: apache/datafusion-comet
	path: benchmark/build/datafusion-comet
	- name: Get Spark query engine jars
	run: bash benchmark/setup_query_engine_jars.sh
	- name: Run benchmark script
	run: bash benchmark/run_benchmark.sh
	- name: Create pull request
	uses: peter-evans/create-pull-request@v6
	with:
	title: Add benchmark results

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