action.yml

name: "Preview in LiveCodes"
description: "Preview code changes in LiveCodes playground"
branding:
  icon: code
  color: white

inputs:
  install-command:
    description: "Install command - optional (e.g. npm install)"
    required: false

  build-command:
    description: "Build command - optional (e.g. npm run build)"
    required: false

  base-url:
    description: "Base URL used for the pattern: {{LC::TO_URL(./file.js)}} - optional"
    required: false

  artifact:
    description: "Artifact name used to save the message - optional"
    required: false
    default: "pr"

  GITHUB_TOKEN:
    description: "Github token of the repository (automatically created by Github)"
    default: ${{ github.token }}
    required: true

outputs:
  message:
    description: "The MarkDown message with preview links (e.g. to post as comment in the PR)"
    value: ${{ steps.generate_output.outputs.message }}

runs:
  using: "composite"
  steps:
    - name: Setup Node
      uses: actions/setup-node@v4
      with:
        node-version: 20

    - name: Install
      if: ${{ inputs.install-command }}
      run: ${{ inputs.install-command }}
      shell: bash

    - name: Build
      if: ${{ inputs.build-command }}
      run: ${{ inputs.build-command }}
      shell: bash

    - name: Generate output
      id: generate_output
      shell: bash
      run: node ${{ github.action_path }}/dist/index.js
      env:
        SHA: ${{ github.event.pull_request.head.sha }}
        REF: ${{ github.event.pull_request.head.ref }}
        PR: ${{ github.event.number }}
        LAST_UPDATED: ${{ github.event.pull_request.updated_at }}
        REPO: ${{ github.repository }}
        BASE_URL: ${{ inputs.base-url }}

    - name: Save output and PR number
      shell: bash
      run: |
        mkdir -p ./pr
        echo "${{ steps.generate_output.outputs.message }}" > ./pr/${{ github.event.number }}.md

    - name: Upload artifact
      uses: actions/upload-artifact@v4
      with:
        name: ${{ inputs.artifact }}
        path: pr/
        retention-days: 1
        overwrite: true