handle ENOBUFS when writing to VM socket #821

	name: Go

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:

	build:
	runs-on: ubuntu-20.04 # explicitly use 20.04, see commit 428c40018a
	timeout-minutes: 30
	strategy:
	fail-fast: false
	matrix:
	go-version: ["1.20.x", "1.21.x", "1.22.x"]
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # history/tags are needed for automatic version generation
	fetch-tags: true

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go-version }}

	- name: Build
	run: \|
	make cross qemu-wrapper vm win-gvproxy win-sshproxy
	mv bin/gvproxy.exe bin/gvproxy-windowsgui.exe

	- uses: actions/upload-artifact@v4
	if: matrix.go-version == '1.21.x'
	with:
	name: gvisor-tap-vsock-binaries
	path: bin/*

	tests:
	runs-on: ubuntu-latest # The runner must support nested virt
	needs: build # Don't bother testing if cross arch build fails
	timeout-minutes: 30
	steps:
	- uses: actions/checkout@v4

	- name: Install qemu
	run: \|
	sudo apt install qemu-kvm
	sudo usermod -a -G kvm $USER

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version-file: 'go.mod'

	- name: Test
	run: \|
	sudo -s -u ${USER} bash -c 'make test'

	- uses: actions/upload-artifact@v4
	if: always()
	with:
	name: qcon
	path: test/qcon.log

	win-sshproxy-tests:
	runs-on: windows-latest # Only builds/runs on windows
	timeout-minutes: 30
	steps:
	- uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version-file: 'go.mod'

	- name: Build
	run: make win-sshproxy

	- name: Test
	run: go test -v .\test-win-sshproxy

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