Using git revision as cache key

Support
1

Hi there, I’m considering migrating https://chrisdown.name from Jekyll to Zola, since it’s the last thing I really use in Ruby. Most plugins are easily able to be rewritten as shortcodes. One I am not sure about the best way to go about is this one:

module GitRevPlugin
  class GitRev < Jekyll::Generator
    safe true
    def generate(site)
      site.data['gitrev'] = %x(git rev-parse --short HEAD).strip
    end
  end
end

I then use this as a cache key later to make sure the version of the CSS is the same as the page being displayed:

<link rel="stylesheet" href="/css/style.css?{{ site.data["gitrev"] }}">

I see a couple of ways I could do this in Zola, but both seem less than ideal since they both rely on an external build script:

  1. Dynamically generate a shortcode with a build script before running Zola, embedding the current git revision.
  2. Put the current git revision in an environment variable using a build script, and then query that from a shortcode.

Is there some way to avoid having to create an external build script for this? Thanks!

2

It’s not available right now. It could be added but it’s something we would want to add automatically on every page render I think, rather than on a function call? See Feature request: build datetime · Issue #2375 · getzola/zola · GitHub for something related