[2/2] Add differential flamegraph script #2821

	---
	name: pr-linter
	on:
	pull_request
	permissions:
	contents: read
	concurrency:
	group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event.pull_request.number \|\| github.run_id }}
	cancel-in-progress: true
	jobs:
	get-linter-image:
	uses: ./.github/workflows/get_image.yaml
	with:
	image-base-name: "linter_image"
	run-container-lint:
	runs-on: ubuntu-latest-8-cores
	needs: get-linter-image
	container:
	image: ${{ needs.get-linter-image.outputs.image-with-tag }}
	options: --cpus 7
	steps:
	- uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3 # v3.5.0
	with:
	fetch-depth: 100
	- name: yarn cache
	uses: actions/cache@88522ab9f39a2ea568f7027eddc7d8d8bc9d59c8 # v3.3.1
	with:
	path: ./src/ui/.yarn/cache
	key: yarn-cache-${{ hashFiles('src/ui/yarn.lock', 'src/ui/.yarnrc.yml') }}
	restore-keys: \|
	yarn-cache-
	- name: Add pwd to git safe dir
	run: git config --global --add safe.directory `pwd`
	- name: Fetch main
	run: git fetch origin main:main
	- name: Check merge base
	run: git merge-base origin/main HEAD # This is what arc uses to determine what changes to lint.
	- name: Run arc lint
	run: arc lint --apply-patches --trace
	- name: Fail if any files changed
	shell: bash
	run: \|
	if [[ $(git status --porcelain=v1 \| wc -l) -ne 0 ]]; then
	echo "Please apply the autofix patches suggested by arc lint."
	echo "Changed files:"
	git diff --name-only
	exit 1
	fi

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