Simplify testing commands using a Makefile

Makefile

@@ -0,0 +1,28 @@
+test: dependencies
+	vim -u test/vimrc -c 'Vader! test/*.vader'
+
+test-nvim: dependencies
+	VADER_OUTPUT_FILE=/dev/stderr nvim -u test/vimrc -c 'Vader! test/*.vader' --headless
+
+dependencies = \
+	'junegunn/vader.vim' \
+	'cakebaker/scss-syntax.vim' \
+	'digitaltoad/vim-pug' \
+	'groenewege/vim-less' \
+	'kchmck/vim-coffee-script' \
+	'leafgarland/typescript-vim' \
+	'slm-lang/vim-slm' \
+	'wavded/vim-stylus' \
+	'scrooloose/nerdcommenter'
+
+dependencies:
+	test -L pack/testing/start/vim-vue && exit 0; \
+	mkdir -p pack/testing/start; \
+	cd pack/testing/start; \
+	for repo in $(dependencies); do git clone https://github.com/$$repo.git; done; \
+	ln -s ../../.. vim-vue
+
+clean:
+	rm -rf pack
+
+.PHONY: test test-nvim dependencies clean