DITA Bootstrap Lunr Search

DITA Bootstrap Lunr Search is a DITA Open Toolkit plug-in that extends the DITA Bootstrap HTML output with a Lunr.js search function.

• Installation
  • Installing DITA-OT
  • Installing the Plug-in
  • Installing Node.js
• Usage
  • Adding Lunr Search to HTML Bootstrap output
  • Adding Lunr Search to a GitHub Action
  • Parameter Reference
• License

Installation

The DITA Bootstrap Lunr Search plug-in has been tested with DITA-OT 4.x. Use the latest version for best results.

Installing DITA-OT

1. Download the latest distribution package from the project website at dita-ot.org/download.

2. Extract the contents of the package to the directory where you want to install DITA-OT.

3. Optional: Add the absolute path for the bin directory to the PATH system variable.

   This defines the necessary environment variable to run the dita command from the command line.

See the DITA-OT documentation for detailed installation instructions.

Installing the Plug-in

• Run the plug-in installation commands:

dita install https://github.com/jason-fox/fox.jason.extend.css/archive/master.zip
dita install https://github.com/infotexture/dita-bootstrap/archive/master.zip
dita install https://github.com/infotexture/dita-bootstrap.lunr/archive/master.zip

Installing Node.js

The DITA Bootstrap Lunr Search plug-in uses the Node.js JavaScript runtime to generate the Lunr.js search index. Node.js must therefore be present for the index to be generated successfully.

To download and install a copy, follow the instructions for your operating system on the download page.

Usage

Adding Lunr Search to HTML Bootstrap output

To run, use the html5-bootstrap transformation and add the args.hdr parameter.

PATH_TO_DITA_OT/bin/dita -f html5-bootstrap -o out -i PATH_TO_DITAMAP \
  --args.hdr=path/to/your-header.xml

A sample header file with a search box is provided with the plug-in: includes/hdr.navbar.lunr.xml - the core markup can be seen below.

<li class="nav-item d-flex align-items-center">
  <span class="nav-link pe-2">
    <i class="bi bi-search"/>
  </span>
  <form class="search-box position-relative me-auto">
    <input type="search" class="form-control" placeholder="Search…" aria-label="Search for…" dir="auto"/>
  </form>
</li>

Adding Lunr Search to a GitHub Action

You can use the standard dita-ot-action to run with Lunr Search. Since the transform requires Node.js to function, it is necessary to install it as part of the install process. Also, when creating documents in languages other than English, please ensure that the appropriate locale has been set prior to running the transform to ensure that the search index is generated correctly.

name: Create DITA with Lunr Search (DE)
permissions:
  contents: write

'on':
  workflow_dispatch: null

jobs:
  build-dita:
    name: Build DITA
    runs-on: ubuntu-latest
    steps:
      - name: Git checkout
        uses: actions/checkout@v3
      - name: Build HTML5 + Bootstrap
        uses: dita-ot/dita-ot-action@4.0.2
        with:
          install: |
            apt-get update -q
            export DEBIAN_FRONTEND=noninteractive
            apt-get install -qy --no-install-recommends nodejs
            nodejs -v
            locale-gen de_DE.UTF-8
            LANG="de_DE.UTF-8"
            LANGUAGE="de_DE:de"
            LC_ALL="de_DE.UTF-8"
          plugins: |
            fox.jason.extend.css
            dita-bootstrap
            dita-bootstrap.lunr
          project: .github/dita-ot/html.xml
      - name: 'Deploy Documentation to GitHub Pages'
        uses: JamesIves/github-pages-deploy-action@v4.4.3
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          branch: gh-pages
          folder: out

Parameter Reference

• offline.mode - enables Lunr search to work in conjunction with DITA Bootstrap offline mode - this requires an additional plugin to be installed.

License

Apache 2.0 © 2023 Jason Fox

The Program includes the following additional software components which were obtained under license:

• lunr.js - https://github.com/olivernn/lunr.js - MIT license
• lunr-languages - https://github.com/MihaiValentin/lunr-languages - Mozilla Public license