coverage-tests.yaml

# Workflow to check code coverage on push.
# This action caches the built Docker image for a month unless any change in the Dockerfile.
name: 100% Coverage

on:
  workflow_dispatch:
  pull_request:
    branches:
      - main

env:
  PATH_CACHE: /tmp/docker-img-arch

jobs:
  go:
    name: Run tests on Go via container
    if: ${{ !github.event.pull_request.draft }}

    runs-on: ubuntu-latest
    steps:
      - name: Checkout repo
        uses: actions/checkout@v2

      - name: Create image tag
        id: imagetag
        run: |
          HASH_IMAGE=${{ hashFiles('./.github/Dockerfile') }}
          VARIANT=$(TZ=UTC-9 date '+%Y%m')
          TAG="${HASH_IMAGE:0:7}:${VARIANT}"
          PATH_TAR=${{ env.PATH_CACHE }}"/tar"
          echo "::set-output name=TAG::${TAG}"
          echo "::set-output name=PATH_TAR::${PATH_TAR}"

      - name: Cache or restore image archive
        id: cache
        uses: actions/cache@v2
        with:
          path: ${{ env.PATH_CACHE }}
          key: ${{ steps.imagetag.outputs.TAG }}

      - name: Load Docker images if exist
        if: steps.cache.outputs.cache-hit == 'true'
        run: |
          docker load --input ${{ steps.imagetag.outputs.PATH_TAR }}/github_coverage_1.tar

      - name: Pull base images if no-exist
        if: steps.cache.outputs.cache-hit != 'true'
        run: |
          : # Pull images before build for stability
          docker pull golang:1.15-alpine

      - name: Build Docker images if no-exists
        if: steps.cache.outputs.cache-hit != 'true'
        run: |
          mkdir -p ${{ steps.imagetag.outputs.PATH_TAR }}
          : # Build container images
          docker-compose --file ./.github/docker-compose.yml build coverage

      - name: Save built images if no-exists
        if: steps.cache.outputs.cache-hit != 'true'
        run: |
          docker save --output ${{ steps.imagetag.outputs.PATH_TAR }}/github_coverage_1.tar github_coverage:latest

      - name: Run code coverage
        run: docker-compose --file ./.github/docker-compose.yml up --abort-on-container-exit coverage