combo: allow empty string #749

	name: build

	on:
	workflow_dispatch:
	push:
	branches:
	- 'master'
	tags:
	- 'v*'
	pull_request:

	jobs:
	Building:
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	# https://github.com/actions/virtual-environments#available-environments
	os: [ubuntu-latest, windows-latest, macos-latest]
	steps:
	- name: Checkout out source code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	submodules: 'true'

	- if: startsWith(matrix.os,'ubuntu')
	name: Set up LibGL, Mesa & X11 libraries
	run: \|
	sudo apt-get --allow-releaseinfo-change update
	sudo apt-get install -y libgtk-3-dev libasound2-dev libxxf86vm-dev
	- name: Set up Go environment
	uses: actions/setup-go@v5
	with:
	go-version: 1.21.x
	id: go

	- name: Cache Go modules
	uses: actions/cache@v4
	with:
	path: ~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
	restore-keys: \|
	${{ runner.os }}-go-
	- name: run go get
	run: go get -v -t -d ./...
	- name: build
	run: \|
	go build examples/widgets/widgets.go

	- name: test
	run: \|
	go test ./...

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