Check if the GL context is the same as last time we have drawn and re… #231

	---
	# yamllint disable rule:line-length
	name: Linux build

	on:
	push:
	branches:
	- main
	paths-ignore:
	- 'manual/**'
	pull_request:
	branches:
	- main
	paths-ignore:
	- 'manual/**'

	env:
	# Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
	BUILD_TYPE: Release

	jobs:
	build:
	runs-on: ${{ matrix.runner }}
	name: ${{ matrix.name }}
	strategy:
	fail-fast: false
	matrix:
	include:
	- name: Ubuntu latest wxGTK 3
	runner: ubuntu-latest
	cmake_generator: Unix Makefiles

	env:
	wxGTK_VERSION: ${{ matrix.gtk_version && matrix.gtk_version \|\| 3 }}

	# Use bash as the shell, even under MSW where the default is PowerShell.
	defaults:
	run:
	shell: bash

	steps:
	- uses: actions/checkout@v3
	with:
	submodules: 'recursive'

	- name: Before build
	run: \|
	./ci/github-pre-build.sh
	env:
	USE_HOMEBREW: ${{ matrix.use_homebrew && matrix.use_homebrew \|\| 0 }}

	- name: Configure CMake
	run: cmake -B build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} ${{ matrix.cmake_defines }}

	- name: Build
	run: cmake --build build --config ${{env.BUILD_TYPE}}

	- name: Test
	if: runner.os != 'Linux'
	# TODO: The tests do not work in headless Linux containers (GTK crashes) with wxWidgets 3.0 available in Ubuntu
	# They seem to be fine with wx 3.1 though, so we will just remove the condition "later" when wx3.2 time comes
	# On Windows, we would need opencpn.exe in the worjing directory to run the tests (and wxWidgets libs in the path)
	working-directory: build
	run: ctest -C ${{env.BUILD_TYPE}}
	...

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