name: GitHub Actions CI

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

jobs:

  build:
    name: CI
    runs-on: ubuntu-latest
    steps:

    - name: Set up Go 1.x
      uses: actions/setup-go@v2
      with:
        # Run on the latest minor release of Go 1.19:
        go-version: ^1.19
      id: go

    - name: Check out code into the Go module directory
      uses: actions/checkout@v2

    - name: Ensure all files were formatted as per gofmt
      run: |
        [ "$(gofmt -l $(find . -name '*.go') 2>&1)" = "" ]

    - name: Get dependencies
      run: |
        go get -v -t -d ./...

    - name: Go Vet
      run: |
        go vet

    - name: Build
      run: |
        go build -v .

    - name: Test
      run: |
        go test -c

    - name: Build Docker container with i3
      run: |
        docker build --pull --no-cache --rm -t=goi3 -f travis/Dockerfile .

    - name: Run tests in Docker container
      # The --init flag is load-bearing! Xserver(1) (including the Xvfb variant)
      # will not send SIGUSR1 for readiness notification to pid 1, so we need to
      # ensure that the i3.test process is not pid 1:
      # https://gitlab.freedesktop.org/xorg/xserver/-/blob/4195e8035645007be313ade79032b8d561ceec6c/os/connection.c#L207
      run: |
        docker run --init -v $PWD:/usr/src goi3 ./i3.test -test.v