build.yml

# NOTES:
# 1. Create PAT with `read:packages` and `write:packages` see https://docs.github.com/en/free-pro-team@latest/packages/guides/migrating-to-github-container-registry-for-docker-images#authenticating-with-the-container-registry
# 2. Create CR_PAT variable under Settings / Secrets

name: BUILD

on:
  push:
    # Publish `v1.2.3` tags as releases.
    tags:
    - v*

env:
  FETCHER_IMAGE_VERSION: ""
  BASE_IMAGE_VERSION: ""

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Run build
        run: |
          IMAGE_NAME=ghcr.io/$(echo "${{ github.repository }}" | tr '[A-Z]' '[a-z]' )
          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          docker build . \
           --build-arg FETCHER_IMAGE_VERSION=${FETCHER_IMAGE_VERSION} \
           --build-arg BASE_IMAGE_VERSION=${BASE_IMAGE_VERSION} \
           --file Dockerfile --tag $IMAGE_NAME:$VERSION

      - name: Log into GitHub Container Registry
        run: echo "${{ secrets.CR_PAT }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin

      - name: Push image to GitHub Container Registry
        run: |
          IMAGE_NAME=ghcr.io/$(echo "${{ github.repository }}" | tr '[A-Z]' '[a-z]' )
          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
          echo IMAGE_NAME=$IMAGE_NAME
          echo VERSION=$VERSION
          docker push $IMAGE_NAME:$VERSION
          # Push latest as well for caching purposes
          docker tag $IMAGE_NAME:$VERSION $IMAGE_NAME:latest
          docker push $IMAGE_NAME:latest