Slopped variants of Copper and Silver #2979

	name: JSON linter + luacheck

	on: [push, pull_request, workflow_dispatch]

	jobs:
	# Check JSON assets for syntax errors.
	json-linter:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- name: Install dependencies
	run: ( cd tests/travis && npm install )

	- name: RUN -- npm test
	run: ( cd tests/travis && npm test )

	# Check Lua files with "luacheck" tool (Lua static analyzer).
	luacheck:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- name: Install dependencies
	run: sudo apt-get install -y luarocks && sudo luarocks install luacheck
	- name: RUN -- luacheck .
	run: luacheck --no-color --quiet .

	# Detect non-optimized PNG images (where lossless compression can seriously reduce their filesize).
	unoptimized-png-images:
	if: ${{ github.base_ref \|\| github.ref != 'refs/heads/master' }}
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- name: Install dependencies
	run: sudo apt-get install -y optipng
	- run: .github/scripts/detect-unoptimized-png-images.sh

	# Create .pak file for each GitHub release.
	pack-assets:
	if: startsWith(github.ref, 'refs/tags/')
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- name: Remove directories that are not needed inside PAK file (e.g. ".git" or "tests")
	run: rm -rf .git a_modders tests
	- uses: edwardspec/github-action-pack-starbound-mod@v1
	with:
	outputFilename: FrackinUniverse.pak
	- run: ls -l FrackinUniverse.pak
	- name: Add .pak file to release
	uses: softprops/action-gh-release@v1
	with:
	files: FrackinUniverse.pak
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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