htmlproofer-action

A Github Action that runs htmlproofer.

Defaults are set up to support jekyll + Github Pages websites.

Usage

Add this snippet to a github workflow after the step that builds your site.

- uses: athackst/htmlproofer-action@main

Quickstart

name: Build and deploy Jekyll site to GitHub Pages

on:
  push:
    branches:
      - main

jobs:
  github-pages:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Setup Ruby
        uses: ruby/setup-ruby@v1
        with:
          bundler-cache: true
          cache-version: 0
      - name: Build with Jekyll
        # Outputs to the './_site' directory by default
        run: bundle exec jekyll build
        env:
          JEKYLL_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - uses: athackst/htmlproofer-action@main

Options

Name	Description	Default
directory	The directory to scan	./_site (required)
allow_hash_href	If true, assumes href="#" anchors are valid	true
allow_missing_href	If true, does not flag a tags missing href. In HTML5, this is technically allowed, but could also be human error.	false
assume_extension	Automatically add specified extension to files for internal links, to allow extensionless URLs (as supported by most servers)	.html
checks	An array of Strings indicating which checks you want to run	['Links', 'Images', 'Scripts']
check_external_hash	Checks whether external hashes exist (even if the webpage exists)	true
check_internal_hash	Checks whether internal hashes exist (even if the webpage exists)	true
check_sri	Check that <link> and <script> external resources use SRI	false
directory_index_file	Sets the file to look for when a link refers to a directory.	index.html
disable_external	If true, does not run the external link checker	false
enforce_https	Fails a link if it's not marked as https.	true
extensions	An array of Strings indicating the file extensions you would like to check (including the dot)	['.html']
ignore_empty_alt	If true, ignores images with empty/missing alt tags (in other words, <img alt> and <img alt=""> are valid; set this to false to flag those)	true
ignore_files	An array of Strings or RegExps containing file paths that are safe to ignore.	[]
ignore_empty_mailto	If true, allows mailto: hrefs which do not contain an email address.	false
ignore_missing_alt	If true, ignores images with missing alt tags	false
ignore_status_codes	An array of numbers representing status codes to ignore.	[]
ignore_urls	An array of Strings or RegExps containing URLs that are safe to ignore. This affects all HTML attributes, such as alt tags on images.	[]
swap_urls	A hash containing key-value pairs of RegExp => String. It transforms URLs that match RegExp into String via gsub.	{}
host	The host URL of your site so urls can be evaluated as local.	${{ github.repository_owner }}.github.io\/
base_path	The base path of your site so urls can be evaluated as local.	${{ github.event.repository.name }}
retries	Number of times to retry checking links	3

The following options are currently not supported by this action

Name	Description	Default
log_level	Sets the logging level, as determined by Yell. One of :debug, :info, :warn, :error, or :fatal.	:info
only_4xx	Only reports errors for links that fall within the 4xx status code range.	false
swap_attributes	JSON-formatted config that maps element names to the preferred attribute to check	{}

name: Build Jekyll site
on:
  push:
    branches: ["main"]
permissions:
  contents: read
  pages: write
  id-token: write
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Setup Pages
        id: pages
        uses: actions/configure-pages@v3
      - name: Build
        uses: actions/jekyll-build-pages@v1
      - name: HTMLProofer
        uses: athackst/htmlproofer-action@main
        with:
          host: ${{ steps.pages.outputs.host }}
          base_path: ${{ steps.pages.outputs.base_path }}
      - name: Upload artifact
        uses: actions/upload-pages-artifact@v1
  deploy:
    runs-on: ubuntu-latest
    needs: build
    if: github.ref == 'refs/heads/main'
    steps:
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v2
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}

Examples

Use with mkdocs

name: Build and deploy Jekyll site to GitHub Pages

on:
  push:
    branches:
      - main

jobs:
  github-pages:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Build and push docs
        uses: athackst/mkdocs-simple-plugin@main
      - name: Htmlproofer
        uses: athackst/htmlproofer-action@main
        with:
          directory: site

Ignore a url

This uses the same syntax as htmlproofer, but you can either use a comma or new line to separate values.

- name: Htmlproofer
  uses: athackst/htmlproofer-action@main
  with:
    ignore_urls: |
      /twitter.com/
      https://fonts.gstatic.com

Swap a url

This swaps urls so that local base name and version numbers are disregarded in url links

- name: Htmlproofer
  uses: athackst/htmlproofer-action@main
  with:
    directory: site
    url_swap: |
      ^https.?\/\/.*.github.io\/${{ github.event.repository.name }}:
      ^\/${{ github.event.repository.name }}:
      ^\/dev:
      ^\/v\d+\.\d+\.\d+:

Local docker

You can also run this locally using the docker image. This can be helpful in understanding errors.

I make a local alias that calls the docker file with environment variables set based on my common use cases.

function htmlproofer_action() {
        curr_dir="$PWD/$1"
        echo "Running on $curr_dir"
        base_dir=$(basename "$PWD")
        url_swap="^\/${base_dir}:,^\/dev:,^\/v\d+\.\d+\.\d+:"
        docker run -v ${curr_dir}:/site -e INPUT_URL_SWAP=${url_swap} althack/htmlproofer:latest
}

Then I can just go to the folder the site is built in and run the htmlproofer.

htmlproofer _site

License

This software is licensed under Apache 2.0.