build-client.yml

# To use, configure github repo settings -> Secrets:
#   * DOCKER_REGISTRY   eg. docker.io:port/ (optional, leave unset for dockerhub, trailing slash required)
#   * DOCKER_ORGANIZATION
#   * DOCKER_USERNAME
#   * DOCKER_PASSWORD

name: Build Docker Client
on: [push, pull_request, workflow_dispatch]

jobs:
  job0:
    name: Build Docker Client
    runs-on: ubuntu-20.04
    steps:
      # Prepares a list of tags for this docker image build.
      # CONDITION, TEMPLATE  , EXAMPLE
      # always   , commit_sha, 273a2c414ba39a4a1d6668515c9d880dc6b5b8793f93d34fb7f4eb12cb686ac6
      # tag      , tag       , tag
      # branch   , branch    , master
      # pr       , pr-#      , pr-37
      #
      # So a docker image would be built for commit hash 273a2c414ba39a4a1d6668515c9d880dc6b5b8793f93d34fb7f4eb12cb686ac6
      # and would be tagged like:
      #    snowblossomcoin/client:273a2c414ba39a4a1d6668515c9d880dc6b5b8793f93d34fb7f4eb12cb686ac6
      #    snowblossomcoin/client:2.0.0
      #    snowblossomcoin/client:master  (until the next master build replaces this)
      - name: Determine Meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: ${{ secrets.DOCKER_REGISTRY }}${{ secrets.DOCKER_ORGANIZATION }}/client
          tags: |
            type=sha,format=long,prefix=
            type=ref,event=tag
            type=ref,event=branch
            type=ref,event=pr
            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          registry: ${{ secrets.DOCKER_REGISTRY }}
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and Push
        uses: docker/build-push-action@v2
        with:
          push: true
          file: example/deployment/docker/client
          build-args: |
            GIT_REPO=${{ secrets.GIT_REPO }}
            GIT_REF=${{ github.sha }}
          # applies the tags determined earlier.
          tags: ${{ steps.meta.outputs.tags }}