action.yml

name: "OGImage"
branding:
  icon: "image"
  color: "gray-dark"
description: "Dynamically generate Open Graph images (OG:Image). This is useful for giving your links more context on Twitter and more."
inputs:
  template-path:
    description: "The path to the html or markdown to use as a template"
    required: false
  hashtable:
    description: "A hashtable of key/value pairs to replace in the template. Use a FileName key (without an extension) to specify the filename to use for the image, otherwise, it'll be saved with a temporary name."
    required: false
    default: |-
      @{
        "FileName"          = "blog-thumbnail"
        "--TITLE--"         = "Sample Title"
        "--AUTHOR--"        = "This too"
        "--SYNOPSIS--"      = "Sample body"
        "--FOOTER--"        = "Footer sample"
      }
  hashtable-filepath:
    description: "If you'd prefer to use an external PowerShell file to create your images instead of a hardcoded hashtable in YAML, you can use this to specify the filepath to use. This file should only contain a hashtable and start with @{"
    required: false
  output-path:
    description: "The output path where the generated images will be saved. This will generally be your website's repository. By default, however, it'll save all output to /tmp/pics."
    default: "/tmp/pics"
    required: false
  stylesheet:
    description: "A comma-separated list of paths to any CSS files you'll be using. Can include file paths and even web addresses."
    required: false
  no-artifact:
    description: "By default, the markdown, html and png files are saved as an artifact. Set to true to skip the upload."
    default: "false"
    required: false
  no-optimize:
    description: "Don't optimize the png (greatly decreases size but takes a bit)."
    default: "false"
    required: false
runs:
  using: "composite"
  steps:
    - uses: actions/checkout@v3
    - uses: nikeee/setup-pandoc@v1
    - uses: actions/setup-node@v3
      with:
        node-version: lts/*

    - id: psoutput
      shell: pwsh
      run: |
        if (-not (Test-Path -Path /tmp/installed)) {
          npx --yes playwright install --with-deps chromium
          sudo apt-get install -y optipng
          touch /tmp/installed
        }

        if (-not "${{ inputs.template-path }}") {
          $TemplatePath = "${{ github.action_path }}/sample/template.md"
        } else {
          $TemplatePath = "${{ inputs.template-path }}"
        }

        if ("${{ inputs.stylesheet }}" -eq "./sample/style.css") {
          $CSSPath = "${{ github.action_path }}/sample/style.css, https://fonts.googleapis.com/css?family=Ubuntu, https://fonts.googleapis.com/css?family=Edu+NSW+ACT+Foundation"
        } else {
          $CSSPath = "${{ inputs.stylesheet }}"
        }

        $inputs = @{
              TemplatePath          = $TemplatePath
              ReplaceHash           = ${{  inputs.hashtable }}
              CSSPath               = $CSSPath
              OutputPath            = "${{ inputs.output-path }}"
              ReplaceHashFilePath   = "${{  inputs.hashtable-filepath }}"
              NoOptimize            = "${{  inputs.no-optimize }}"
          }

        ${{ github.action_path }}/main.ps1 @inputs

    - name: Upload artifact
      if: ${{  inputs.no-artifact }} != 'true'
      uses: actions/upload-artifact@v2
      with:
        name: pics
        path: ${{ inputs.output-path }}