Add list-dependent-make-targets script and create Python package #51

	name: ci

	on: [push, pull_request]

	jobs:

	test-action:

	name: Test Github Action

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- name: List prerequisites non-recursively
	id: non-recursive-prerequisites
	uses: ./
	with:
	working-directory: test
	target: test1
	- name: Check non-recursive prerequisites
	run: \|
	test "${{ steps.non-recursive-prerequisites.outputs.prerequisites }}" = "prereq"
	echo ${{ steps.non-recursive-prerequisites.outputs.hash }}
	- name: List recursive prerequisites
	id: recursive-prerequisites
	uses: ./
	with:
	working-directory: test
	target: test1
	flags: --recursive
	- name: Check recursive prerequisites
	run: \|
	test "${{ steps.recursive-prerequisites.outputs.prerequisites }}" = "preprereq1 preprereq2"
	echo ${{ steps.recursive-prerequisites.outputs.hash }}
	- name: Hash directory prerequisite
	id: hash-dir-prerequisite
	uses: ./
	with:
	working-directory: test
	target: test2
	flags: --recursive
	- name: Check directory prerequisite hash
	run: \|
	test "${{ steps.hash-dir-prerequisite.outputs.prerequisites }}" = "dirprereq"
	test "${{ steps.hash-dir-prerequisite.outputs.hash }}" = "c64a77871513eadd52ec0e278bfbac1db866b77f66ebe91725b378b8bf43e29c"
	- name: Install package
	run: \|
	python -m pip install .
	- name: List dependent targets non-recursively
	working-directory: test
	run: \|
	test $(list-dependent-make-targets preprereq1) = prereq
	- name: List dependent targets recursively
	working-directory: test
	run: \|
	test "$(list-dependent-make-targets preprereq1 -r \| xargs)" = ".DEFAULT_GOAL prereq test1"

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