Enabling opt-out for Giscus comments

I’d like to restrict discussions to blog entries, and want to disable them in the index and other sites.

• we previously added a custom templates/layout.html that is unconditionally added to every page

• I want to be able to specify comments: false in the metadata section of a site to opt-out of discussions

• thus guard loading of the script with {% if 'comments' in meta and meta.comments != 'False' %}

• note that the check in Jinja is case-sensitive (I specify false in the metadata and need to check for False)

• add comments: false to all non-blog pages

Enabling discussions for this blog via Giscus   Introduction: this is Felix Schindler