update-dockerfile-dev.yml

name: Update dev image

on:
  schedule:
    - cron: '0 1 * * *'  # Run every day
  workflow_dispatch:

env:
  SAGE_TARGET: ghcr.io/sagemath/sage/sage-ubuntu-focal-standard-with-targets
  SAGE_SYSTEM: ghcr.io/sagemath/sage/sage-ubuntu-focal-standard-with-system-packages
  TAG: dev
  BRANCH: dev

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      packages: write
    steps:

    # Prepare .github/Dockerfile for slim Sage image

    - name: Checkout code
      uses: actions/checkout@v4
      with:
        ref: ${{ env.BRANCH }}
    - name: Get SageMath version
      run: |
        SAGE_VERSION=$(docker run --rm ${SAGE_TARGET}:$TAG /sage/sage --version | grep -oP 'SageMath version \K[0-9.]+(?:beta\d+)?(?:rc\d+)?')
        echo "SAGE_VERSION=${SAGE_VERSION}" >> $GITHUB_ENV
    - name: Update version in files
      run: |
        SAGE_TARGET_ESCAPED=$(echo "${SAGE_TARGET}" | sed 's/\//\\\//g' | sed 's/\./\\\./g')
        SAGE_TARGET_VERSION_ESCAPED=$(echo "${SAGE_TARGET}:${SAGE_VERSION}" | sed 's/\//\\\//g' | sed 's/\./\\\./g')
        sed -i "s/FROM ${SAGE_TARGET_ESCAPED}:\S*/FROM ${SAGE_TARGET_VERSION_ESCAPED}/g" .github/Dockerfile
        SAGE_SYSTEM_ESCAPED=$(echo "${SAGE_SYSTEM}" | sed 's/\//\\\//g' | sed 's/\./\\\./g')
        SAGE_SYSTEM_VERSION_ESCAPED=$(echo "${SAGE_SYSTEM}:${SAGE_VERSION}" | sed 's/\//\\\//g' | sed 's/\./\\\./g')
        sed -i "s/FROM ${SAGE_SYSTEM_ESCAPED}:\S*/FROM ${SAGE_SYSTEM_VERSION_ESCAPED}/g" .github/Dockerfile
        PACKAGE_NAME=ghcr.io/${{ github.repository }}:${SAGE_VERSION}
        PACKAGE_NAME_ESCAPED=$(echo "${PACKAGE_NAME}" | sed 's/\//\\\//g')
        sed -i "s/FROM \S*/FROM ${PACKAGE_NAME_ESCAPED}/g" Dockerfile
        sed -i "s/FROM \S*/FROM ${SAGE_TARGET_VERSION_ESCAPED}/g" README.rst
        echo "PACKAGE_NAME=$PACKAGE_NAME" >> $GITHUB_ENV
    - name: Commit changes
      run: |
        git config --global user.email alice@wonderland
        git config --global user.name alice
        git commit -a --amend -m "Dockerfile for Sage ${SAGE_VERSION}"
        git push -f origin $BRANCH

    # Build and publish the slim Sage image to github package registry (ghpr)

    - name: Log in to the Container registry
      uses: docker/login-action@v3
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}
    - name: Build and push Docker image
      uses: docker/build-push-action@v5
      with:
        context: .github
        push: true
        tags: ${{ env.PACKAGE_NAME }}

    # Build docker image for Binder from Dockerfile at root

    - name: Binder build
      timeout-minutes: 30
      continue-on-error: true
      run: |
        curl --keepalive-time 600 -L https://mybinder.org/build/gh/sagemath/sage-binder-env/$BRANCH