build.yml

name: Build & Deploy
on:
  workflow_dispatch:
  push:
    paths:
      - comets_shinyapp_example/**
    branches:
      - master
  pull_request:
    paths:
      - comets_shinyapp_example/**
    branches:
      - master

jobs:
  build:
    permissions:
      pages: write
      id-token: write
      contents: read
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: comets_shinyapp_example
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Login to Docker
        uses: docker/login-action@v3
        if: github.event_name != 'pull_request'
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Cache Docker layers
        uses: actions/cache@v4
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: hicsail/comets_shinyapp
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v6
        with:
          context: ./comets_shinyapp_example
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max