Standalone installers #409

	name: Standalone installers

	on:
	push:
	branches:
	- master
	paths:
	- bin/standalone-installer-unix
	- bin/standalone-installer-windows

	pull_request:
	paths:
	- bin/standalone-installer-unix
	- bin/standalone-installer-windows

	# Routinely check that the external resources the installers rely on keep
	# functioning as expected.
	schedule:
	# Every day at 17:42 UTC / 9:42 Seattle (winter) / 10:42 Seattle (summer)
	- cron: "42 17 * * *"

	workflow_dispatch:

	jobs:
	# The goal here is to make sure the installers run successfully on a variety
	# of OS versions. We're _not_ testing unreleased standalone builds here—the
	# installation archives are downloaded from the latest release on GitHub via
	# nextstrain.org endpoints—which is why this isn't part of CI. That is, this
	# is akin to testing `pip install nextstrain-cli` if we wanted to make sure
	# `pip` worked.
	# -trs, 29 August 2022
	test:
	name: test (os=${{ matrix.os }})
	strategy:
	fail-fast: false
	matrix:
	os:
	- ubuntu-20.04
	- ubuntu-22.04
	- macos-11
	- macos-12
	- windows-2019
	- windows-2022

	runs-on: ${{matrix.os}}
	steps:
	- uses: actions/checkout@v3

	# Use pipes like are used in the real instructions when the installer is
	# fetched from nextstrain.org. This tests that the shell programs work
	# when they're specifically executed this way.
	- if: runner.os != 'Windows'
	run: \|
	# shellcheck disable=SC2002
	cat ./bin/standalone-installer-unix \| bash
	shell: bash

	- if: runner.os == 'Windows'
	run: Get-Content -Raw ./bin/standalone-installer-windows \| Invoke-Expression
	shell: pwsh

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