[CMake][CI] Add support to Qt6 #88

	name: ubuntu

	on:
	workflow_dispatch:
	push:
	pull_request:

	jobs:
	linux:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: recursive

	- name: Installing Qt5.15.0 ubuntu
	uses: jurplel/install-qt-action@v4
	with:
	version: '5.15.0'
	cache: true
	cache-key-prefix: '[email protected]_ubuntu'

	- name: set path
	run: \|
	echo PATH=$PATH:`pwd`
	echo PATH=$PATH:`pwd` >> $GITHUB_ENV
	echo QT_DIR=$QT_ROOT_DIR
	echo QT_DIR=$QT_ROOT_DIR >> $GITHUB_ENV

	# CMake
	- name: build with cmake
	run: \|
	mkdir cmake-build
	cd cmake-build
	cmake -DCMAKE_BUILD_TYPE=Release .. && cmake --build .

	# Premake
	- name: checkout premake5
	uses: actions/checkout@v4
	with:
	repository: premake/premake-core
	path: premake-build

	- name: Build premake5
	run: \|
	cd premake-build
	make -f Bootstrap.mak linux CONFIG=release
	cp bin/release/premake5 ../
	cd ..
	rm -Rf premake-build

	- name: build with premake
	run: \|
	./premake5 gmake2 && cd solution/gmake2 && make config=release_x64

	#
	# - name: install libxkbcommon-x11-0 # display dependency
	# run: sudo apt-get install libxkbcommon-x11-0
	#
	# - name: run
	# timeout-minutes: 5 # tends to not stop properly in case of failure
	# run: \| # fake X-server as Qt widget requires displays :/
	# # Cannot use environment variable ($QT_ROOT_DIR) in command line, so use environment variable (QT_DIR) or its hardcoded value
	# xvfb-run -a ./app
	#

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