"internally linking to /, which does not exist" on standard GitHub Pages Jekyll site

[DaveSkender]

I'm getting a false negative error on a GitHub Actions local build, serve, and test of my standard GitHub Pages Jekyll site.

The error (see full log)

- _site/indicators/index.html
*  internally linking to /, which does not exist (line 50)
   <a href="/">
      Stock Indicators
   </a>

From source code

<a href="{{ site.baseurl }}/">
  {{ site.title }}
</a>

Note that instances of {{site.baseurl}}/guide/, for example, resolve okay; this seems to be limited to root /.

The html-proofer (3.19.2) commands (also see full YAML for job):

# GitHub Actions step (after site build and serve on `localhost`)
- name: Test for broken URLs
  working-directory: docs
  run: |
    BUNDLE_GEMFILE="${{github.workspace}}/docs/GemFile" bundle exec htmlproofer \
      --assume-extension \
      --http-status-ignore "403,999" \
      --url-swap "https\://daveskender.github.io/Stock.Indicators:" \ 
      _site

# `url-swap` to remove hard-coded prod domains (there are none)

Previous recommendation (see #542)

You'll have to use the assume-extension option: https://github.com/gjtorikian/html-proofer#using-with-jekyll

The workaround

<!-- use absolute URL with full path to root -->
<a href="{{ '/' | absolute_url }}">
  {{ site.title }}
</a>

<!-- builds in local GitHub Actions as: -->
<a href="http://127.0.0.1:4000/">
  Stock Indicators
</a>

<!-- builds in GitHub Pages as: -->
<a href="https://daveskender.github.io/Stock.Indicators/">
  Stock Indicators
</a>

[DaveSkender]

Possibly related to:

• Ignore <a href="#"> when checking internal links #118

[gjtorikian]

Hi—the next version of HTMLProofer has been completely rewritten and this is no longer a problem. By default, 4.x will add all the assumptions necessary to work with Jekyll (previously these were opt-in; now they are opt-out). I am going to close this issue out, as I'm just one person and can't maintain both the 3.x and 4.x features. ✌️ 4.x should be out within the month. Please reopen if it's still broken!