lint

ICC-Sindragosa: rework Mystic Buffet to be cyclic #1441

	name: lint

	on:
	push:
	paths:
	- '.github/workflows/**.yml'
	- '**.lua'
	pull_request:
	paths:
	- '**.lua'

	jobs:
	lint:
	runs-on: ubuntu-latest

	env:
	LUA_VERSION: 5.1.5
	LUAROCKS_VERSION: 2.4.2

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Cache Lua
	uses: actions/cache@v2
	id: luacache
	with:
	path: .lua
	key: ${{ runner.os }}-lua-${{ env.LUA_VERSION }}
	restore-keys: ${{ runner.os }}-lua-${{ env.LUA_VERSION }}

	- name: Cache LuaRocks
	uses: actions/cache@v2
	id: luarockscache
	with:
	path: .luarocks
	key: ${{ runner.os }}-luarocks-${{ env.LUAROCKS_VERSION }}
	restore-keys: ${{ runner.os }}-luarocks-${{ env.LUAROCKS_VERSION }}

	- name: Install Lua
	if: steps.luacache.outputs.cache-hit != 'true'
	run: \|
	sudo apt-get install libreadline-dev libncurses-dev
	wget https://www.lua.org/ftp/lua-${{ env.LUA_VERSION }}.tar.gz -O - \| tar -xzf -
	cd lua-${{ env.LUA_VERSION }}
	make linux
	make -j INSTALL_TOP=$GITHUB_WORKSPACE/.lua install
	rm -rf $GITHUB_WORKSPACE/lua-${{ env.LUA_VERSION }}

	- name: Install LuaRocks and Luacheck
	if: steps.luarockscache.outputs.cache-hit != 'true'
	run: \|
	wget https://luarocks.org/releases/luarocks-${{ env.LUAROCKS_VERSION }}.tar.gz -O - \| tar -xzf -
	cd luarocks-${{ env.LUAROCKS_VERSION }}
	./configure --with-lua-bin=$GITHUB_WORKSPACE/.lua/bin --prefix=$GITHUB_WORKSPACE/.luarocks
	make build
	make install
	PATH=$PATH:$GITHUB_WORKSPACE/.luarocks/bin
	luarocks install luacheck
	luarocks install lanes
	rm -rf $GITHUB_WORKSPACE/luarocks-${{ env.LUAROCKS_VERSION }}

	- name: Luacheck
	run: .luarocks/bin/luacheck . -q

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