Merge pull request #25 from controlplaneio/submodules-auto

refactor: setup make to autofetch submodules and update docs

Author: wakeward

CONTRIBUTING.md

@@ -47,13 +47,8 @@ We also have an issue template for questions [here](https://github.com/controlpl
 
 ## What Should I Know Before I Get Started?
 
-**If you want to run the acceptance tests** make sure to clone with `-recurse-submodules` or if you've already cloned the
-repo you can fetch the submodules with:
-
-```sh
-git submodule init
-git submodule update
-```
+The acceptance tests require some dependencies fetched via submodules. You can either clone the repo with `--recurse-submodules`
+or when running `make test`/`make test-acceptance` it will automatically fetch them if they're missing.
 
 ## How Can I Contribute?
 

Makefile

@@ -83,8 +83,14 @@ test: ## unit and local acceptance tests
 	@echo "+ $@"
 	make test-unit build test-acceptance
 
+test/bin/%:
+	git submodule update --init -- $@
+
+.PHONY: bats
+bats: test/bin/bats test/bin/bats-assert test/bin/bats-support ## fetch bats dependencies
+
 .PHONY: test-acceptance
-test-acceptance: ## acceptance tests
+test-acceptance: bats build ## acceptance tests
 	@echo "+ $@"
 	bash -xc 'cd test && ./bin/bats/bin/bats $(BATS_PARALLEL_JOBS) .'