action.yml

name: "Automate Heroku Review Apps"
description: Use Heroku API to replicate the review app integration

inputs:
  api-key:
    description: "Your Heroku API key"
    required: true
  pipeline-id:
    description: "The id of the pipeline to deploy review app for"
    required: true
  base-name:
    description: "The prefix used to generate review app name. This should be the same as what you specified for the review app URL pattern in Heroku Dashboard"
    required: true

outputs:
  url:
    description: "The URL for the app"
    value: ${{ steps.output-url.outputs.url }}

runs:
  using: "composite"
  steps:
    - name: Generate app name
      shell: bash
      run: |
        echo "APP_NAME=${{ inputs.base-name }}-pr-${{ github.event.number }}" >> $GITHUB_ENV

    - name: Create Source Endpoint
      if: ${{ github.event.label.name != 'delete-review-app' }}
      id: source_endpoint
      shell: bash
      run: |
        export RESPONSE=$(curl -X POST https://api.heroku.com/sources \
        -H "Content-Type: application/json" \
        -H "Accept: application/vnd.heroku+json; version=3" \
        -H "Authorization: Bearer ${{ inputs.api-key }}")
        echo ::set-output name=SOURCE_ENDPOINT::$(echo $RESPONSE | jq -r '{get: .source_blob.get_url, put: .source_blob.put_url}')

    - name: Compress Source Code
      if: ${{ github.event.label.name != 'delete-review-app' }}
      shell: bash
      run: |
        tar -czvf source.tar.gz *

    - name: Upload Source Code
      if: ${{ github.event.label.name != 'delete-review-app' }}
      shell: bash
      run: |
        export URL=$(echo ${{ toJSON(steps.source_endpoint.outputs.SOURCE_ENDPOINT) }} | jq -r '.put')
        curl $URL -X PUT -H 'Content-Type:' --data-binary @source.tar.gz

    - name: Create App
      if: ${{ github.event.label.name == 'create-review-app' }}
      shell: bash
      run: |
        export SOURCE_GET_URL=$(echo ${{ toJSON(steps.source_endpoint.outputs.SOURCE_ENDPOINT) }} | jq -r '.get')
        curl -X POST https://api.heroku.com/review-apps \
        -d '{
        "source_blob": {"url": "'"$SOURCE_GET_URL"'", "version": "'"${{ github.event.pull_request.head.sha }}"'"},
        "branch": "${{ github.head_ref }}",
        "pipeline": "${{ inputs.pipeline-id }}",
        "pr_number": ${{ github.event.number }}
        }' \
        -H "Content-Type: application/json" \
        -H "Accept: application/vnd.heroku+json; version=3" \
        -H "Authorization: Bearer ${{ inputs.api-key }}"

    - name: Create Build
      if: ${{ github.event.label.name == 'update-review-app' }}
      shell: bash
      run: |
        export SOURCE_GET_URL=$(echo ${{ toJSON(steps.source_endpoint.outputs.SOURCE_ENDPOINT) }} | jq -r '.get')
        export OUTPUT_STREAM_URL=$(curl -X POST https://api.heroku.com/apps/$APP_NAME/builds \
        -d '{"source_blob":{"url":"'"$SOURCE_GET_URL"'", "version": "${{ github.event.pull_request.head.sha }}"}}' \
        -H 'Accept: application/vnd.heroku+json; version=3' \
        -H "Content-Type: application/json" \
        -H "Authorization: Bearer ${{ inputs.api-key }}" | \
        jq -r '.output_stream_url')
        curl $OUTPUT_STREAM_URL

    - name: Set Output:url
      id: output-url
      shell: bash
      run: echo "::set-output name=url::$(echo https://$APP_NAME.herokuapp.com)"

    - name: Delete Review App
      if: ${{ github.event.label.name == 'delete-review-app' }}
      shell: bash
      run: |
        curl -X DELETE https://api.heroku.com/apps/$APP_NAME \
        -H "Content-Type: application/json" \
        -H "Accept: application/vnd.heroku+json; version=3" \
        -H "Authorization: Bearer ${{ inputs.api-key }}"