Edit Source link for Gitea, Forgejo, or other self-hosted online repository

[mlncn]

What's the problem this feature will solve?

All code with repository hosting that supports online editing does not have to be on GitHub, GitLab / self-hosted GitLab, or Bitbucket. Gitea, Forgejo, and others exist and are increasingly popular.

Describe the solution you'd like

Extend the options documented on https://docs.readthedocs.com/platform/stable/guides/edit-source-links-sphinx.html to include "Other" with a display_repo setting that takes uses the following variables:

• repo_host
• repo_user (or org)
• repo_slug (repository name as seen in the URL)
• repo_version (branch)
• conf_src_path (to take the place of hard-coded /src/ and /blob path segments for our flexible custom repo)

The existing variable would still be used:

• conf_py_path (appears right before pagename, defaults to /)
• suffix
• and of course the key one that changes for each page of the docs, pagename

{% if display_repo %}
    <a href="https://{{ repo_host|default("codeberg.org") }}/
    {{ repo_user }}/{{ repo_slug  }}{{ conf_src_path|default("/src/branch") }}{{ repo_version }}
    {{ conf_py_path }}{{ pagename }}{{ suffix }}" class="fa fa-git-alt">
    Edit Source</a>
{% endif %}

Alternative solutions

Override default templates, but it is time to support open projects as at least second-class citizens.

Additional context

Pointers for where to add this / how many default themes are supported that should get the above added to their templates would be greatly appreciated.