bug-fix: make var.TFC_GCP_RUN_SERVICE_ACCOUNT_EMAIL optional #3

	---
	name: Terraform CI

	on:
	pull_request:
	branches:
	- master

	jobs:
	formatting:
	name: Check Formatting
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v4

	- name: Check Terraform code is formatted
	uses: docker://hashicorp/terraform:latest
	with:
	entrypoint: terraform
	args: fmt -check -diff -recursive

	validate:
	name: Validate
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v4

	- name: Run Terraform init
	uses: docker://hashicorp/terraform:latest
	with:
	entrypoint: terraform
	args: init

	- name: Run Terraform validate
	uses: docker://hashicorp/terraform:latest
	with:
	entrypoint: terraform
	args: validate

	tflint:
	name: TFLint
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ ubuntu-latest ]
	steps:
	- uses: actions/checkout@v4
	name: Checkout source code

	- uses: actions/cache@v4
	name: Cache plugin dir
	with:
	path: ~/.tflint.d/plugins
	key: ${{ matrix.os }}-tflint-${{ hashFiles('.tflint.hcl') }}

	- uses: terraform-linters/setup-tflint@v4
	name: Setup TFLint

	- name: Init TFLint
	run: tflint --init
	env:
	# https://github.com/terraform-linters/tflint/blob/master/docs/user-guide/plugins.md#avoiding-rate-limiting
	GITHUB_TOKEN: ${{ github.token }}

	- name: Run TFLint
	run: tflint -f compact

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