Add `add-to-path` input to control whether the toolchain is added to the PATH #163

	name: "units-test"
	on:
	pull_request:
	push:
	branches:
	- main
	- 'releases/*'

	jobs:
	# unit tests
	units:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- run: npm ci
	- run: npm test

	# test action works running from the graph
	test:
	strategy:
	fail-fast: true
	matrix:
	include:
	- swift-version: wasm-5.7.1-RELEASE
	os: ubuntu-20.04
	- swift-version: wasm-5.6.0-RELEASE
	os: macos-11
	- swift-version: wasm-5.8.0-RELEASE
	os: ubuntu-latest
	container: swift:amazonlinux2
	runs-on: ${{ matrix.os }}
	container: ${{ matrix.container }}
	steps:
	- uses: actions/checkout@v3
	- uses: ./
	with:
	swift-version: ${{ matrix.swift-version }}
	- run: swift --version
	test-default:
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v3
	- uses: ./
	- run: swift --version
	test-skip-add-to-path:
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v3
	- uses: ./
	id: setup
	with:
	add-to-path: false
	- name: Ensure that the toolchain is not added to the PATH
	shell: node {0}
	run: \|
	const path = require('path');
	const core = require('@actions/core');
	const toolchainPath = path.join(core.getInput('toolchain-path'), 'usr', 'bin');
	const pathEnv = process.env.PATH;
	console.log(`Checking if ${toolchainPath} is in the PATH (${pathEnv})`);
	const pathCandidates = pathEnv.split(path.delimiter);
	if (pathCandidates.includes(toolchainPath)) {
	throw new Error(`Toolchain path ${toolchainPath} is in the PATH`);
	}
	test-nightly:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v3
	- uses: ./nightly
	- run: swift --version

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