action.yml

name: 'Deploy a Cloudflare worker'
description: 'Conditionally deploys a Cloudflare worker, outputs deploy URL'

inputs:
  name:
    required: true
    description: Name of the folder containing the worker code
  build:
    required: false
    description: 'Build script'
    default: ''
  changed:
    required: true
    description: 'Whether the worker code has changed' # check with == 'true'
  mode:
    required: true
    description: 'Deployment mode: `staging` (push to main), `production` (push to release) or `preview` (pull_request to main)'
  skip-deploy:
    required: false
    description: 'Skip actual deployment (only build/test for validation)'
    default: 'false'
  stagingUrl:
    required: true
    description: 'Staging URL Origin'
  productionUrl:
    required: true
    description: 'Production URL Origin'

  # Authentication
  apiToken:
    required: true
    description: 'https://developers.cloudflare.com/fundamentals/api/get-started/create-token/'
  accountId:
    required: true
    description: 'Cloudflare account ID'

  # build time constants
  BUILD_API_URL:
    description: 'API_URL from deploying api'
    required: false
  BUILD_CDN_URL:
    description: 'CDN_URL from deploying cdn'
    required: false
  BUILD_AWS_PREFIX:
    description: 'AWS_PREFIX used for config storage'
    required: true

outputs:
  url:
    description: 'The aliased deploy or the versioned deploy URL if no alias is set'
    value: ${{ steps.get-url.outputs.url }}
  versioned-url:
    description: 'The versioned deploy URL'
    value: ${{ steps.get-url.outputs.versioned-url }}
  did-deploy:
    description: 'Whether the worker was deployed'
    value: ${{ steps.get-url.outputs.did-deploy }}

runs:
  using: 'composite'
  steps:
    - name: Build worker
      if: ${{ inputs.build && (inputs.changed == 'true' || inputs.mode == 'production') }}
      shell: bash
      run: ${{ inputs.build }}
      env:
        NODE_ENV: production
        BUILD_API_URL: ${{ inputs.BUILD_API_URL }}
        BUILD_CDN_URL: ${{ inputs.BUILD_CDN_URL }}
        BUILD_AWS_PREFIX: ${{ inputs.BUILD_AWS_PREFIX }}

    - name: Get worker deploy command
      if: ${{ inputs.skip-deploy == 'false' && (inputs.changed == 'true' || inputs.mode == 'production') }}
      id: command
      shell: bash
      run: |
        DEPLOY_MODE='${{ inputs.mode }}'
        case "$DEPLOY_MODE" in
          preview)    DEPLOY_COMMAND="versions upload --preview-alias pr${{ github.event.pull_request.number }}" ;;
          staging)    DEPLOY_COMMAND="versions upload --preview-alias staging" ;;
          production) DEPLOY_COMMAND="deploy" ;;
        esac
        echo "command=$DEPLOY_COMMAND" >> $GITHUB_OUTPUT

    - name: Deploy Worker
      if: ${{ inputs.skip-deploy == 'false' && (inputs.changed == 'true' || inputs.mode == 'production') }}
      id: deploy
      uses: cloudflare/wrangler-action@v3
      with:
        apiToken: ${{ inputs.apiToken }}
        accountId: ${{ inputs.accountId }}
        command: ${{ steps.command.outputs.command }}
        workingDirectory: ${{ inputs.name }}

    - name: Get deploy URL
      id: get-url
      shell: bash
      # if `deploy` was run: set output versioned-url=deployment-url, and url=deployment-alias-url, and did-deploy='true'
      # if not, set did-deploy='false', url=versioned-url=staging-url if mode=preview|staging; url=versioned-url=production-url if mode=production
      run: |
        DEPLOY_MODE='${{ inputs.mode }}'
        STAGING_URL='${{ inputs.stagingUrl }}'
        PRODUCTION_URL='${{ inputs.productionUrl }}'
        DID_DEPLOY='${{ inputs.changed }}'
        DEPLOY_URL='${{ steps.deploy.outputs.deployment-url }}'
        DEPLOY_URL_ALIAS='${{ steps.deploy.outputs.deployment-alias-url }}'

        echo "did-deploy=$DID_DEPLOY" >> $GITHUB_OUTPUT

        if [[ "$DID_DEPLOY" = 'true' ]]; then
          echo "versioned-url=$DEPLOY_URL" >> $GITHUB_OUTPUT
          url="$DEPLOY_URL_ALIAS"; [ -z "${url}" ] && url="$DEPLOY_URL"
          echo "url=$url" >> $GITHUB_OUTPUT
          exit 0
        fi

        case "$DEPLOY_MODE" in
          preview)    VERSIONED_URL="$STAGING_URL" ;;
          staging)    VERSIONED_URL="$STAGING_URL" ;;
          production) VERSIONED_URL="$PRODUCTION_URL" ;;
        esac
        echo "versioned-url=$VERSIONED_URL" >> $GITHUB_OUTPUT
        echo "url=$VERSIONED_URL" >> $GITHUB_OUTPUT