Randomize go package specs on github actions

go.yml

name: Build & Test

on:
  push:
    branches: [ develop, master ]
  pull_request:
    branches: [ develop, master ]

jobs:

  test-golang:
    runs-on: "..."
    container: golang:1.15-buster
    env:
      N: 8
    strategy:
      fail-fast: false
      matrix:
        # Use the matrix to split tests into 8 parallel executions.
        parallel: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
    steps:
    - uses: actions/checkout@v2
    - name: Run unit tests
      run: |
        # List all packages we need to test, using the checksum as randomizer.
        echo "$HASH" > .seed
        go list -f '{{ if len .TestGoFiles }} {{ .Dir }} {{end}}' ./... | shuf --random-source=.seed > .files

        # Calculate how many lines we need to split over our 8 matrixes.
        LINES=$(wc -l < .files)
        PER_SPLIT=$((($LINES + $N - 1) / $N))
        split --lines=$PER_SPLIT -x .files

        go test $(cat ./x0${{ matrix.parallel}})