name: VS Code Repo Dev Container Cache Image Generation

on:
  push:
    # Currently doing this for master, but could be done for PRs as well
    branches:
      - 'master'

    # Only updates to these files result in changes to installed packages, so skip otherwise
    paths:
      - '**/package-lock.json'
      - '**/yarn.lock'

jobs:
  devcontainer:
    name: Generate cache image
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        id: checkout
        uses: actions/checkout@v2

      - name: Azure CLI login
        id: az_login
        uses: azure/login@v1
        with:
          creds: ${{ secrets.AZ_ACR_CREDS }}

      - name: Build and push
        id: build_and_push
        run: |
          set -e

          ACR_REGISTRY_NAME=$(echo ${{ secrets.CONTAINER_IMAGE_REGISTRY }} | grep -oP '(.+)(?=\.azurecr\.io)')
          az acr login --name $ACR_REGISTRY_NAME

          GIT_BRANCH=$(echo "${{ github.ref }}" | grep -oP 'refs/(heads|tags)/\K(.+)')
          if [ "$GIT_BRANCH" == "" ]; then GIT_BRANCH=master; fi

          .devcontainer/cache/build-cache-image.sh "${{ secrets.CONTAINER_IMAGE_REGISTRY }}/public/vscode/devcontainers/repos/microsoft/vscode" "${GIT_BRANCH}"