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jekyll / jekyll-sitemap

Jekyll plugin to silently generate a sitemaps.org compliant sitemap for your Jekyll site
http://rubygems.org/gems/jekyll-sitemap
MIT License
949 stars 134 forks source link

Deducing <lastmod> from git log on a GitHub Pages site #314

Open sh1boot opened 1 month ago

sh1boot commented 1 month ago

I see several other bugs here mentioning jekyll-last-modified-at as the source of truth for modification dates, but that plugin is not mentioned in the GitHub Pages Dependency Versions.

Am I right to deduce that this means that the default GitHub Pages deployment can't produce correct modification dates because of this? Or is there another way?

jamesmacwhite commented 1 week ago

GitHub pages only provides a limited set of plugins that can run in a GitHub pages build environment. Essentially any GitHub pages Jekyll build i.e. compile to static is done with the --safe option disabling any plugins, but GitHub pages includes a few directly which are allowed. Anything not listed in the dependency versions list, means it won't be available.

If you want to use the jekyll-last-modified-at plugin, you can't use GitHub pages directly to build your site, but you can still host it on GitHub pages. You'll however need to have another process build/compile the Jekyll and then upload the build to the _site directory on your GitHub pages branch.

Without doing the above, you are limited to setting it in front-end matter files.

For clarification, see the note on the Jekyll plugin installation information "Plugins on GitHub Pages"