Clean up fetch data #298

	name: Check PR size

	on:
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	check_pr_size:
	runs-on: ubuntu-latest
	timeout-minutes: 1

	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Calculate changed lines
	id: diff_check
	run: \|
	# Get the target branch commit (base) and the PR branch commit (head)
	BASE_SHA="${{ github.event.pull_request.base.sha }}"
	HEAD_SHA="${{ github.event.pull_request.head.sha }}"
	echo "Base SHA: $BASE_SHA"
	echo "Head SHA: $HEAD_SHA"

	# Compute the merge base between the two branches
	MERGE_BASE=$(git merge-base "$HEAD_SHA" "$BASE_SHA")
	echo "Merge Base: $MERGE_BASE"

	# Calculate added and deleted lines between the merge base and the head commit
	TOTAL_CHANGED=$(git diff --numstat "$MERGE_BASE" "$HEAD_SHA" \
	\| awk '{ added += $1; deleted += $2 } END { print added + deleted }')

	# Default to 0 if nothing is output
	TOTAL_CHANGED=${TOTAL_CHANGED:-0}
	echo "Total changed lines: $TOTAL_CHANGED"

	# Make the total available for later steps
	echo "total=$TOTAL_CHANGED" >> "$GITHUB_OUTPUT"

	- name: Fail if too many changes
	if: ${{ steps.diff_check.outputs.total > 500 }}
	run: \|
	echo "PR has ${{ steps.diff_check.outputs.total }} changed lines, which exceeds the 500-line limit."
	echo "Please reduce the size of this PR."
	exit 1

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