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wiki/notebook/cookbook.hugo.base16-themes.org
Gabriel Arazas b088086b06 Merge evergreen notes into the notebook 
Now, it's all under the notebook umbrella. Seems to be appropriate as it
is just my notes after all.

I also updated some notes from there. I didn't keep track of what it is
this time. Something about more learning notes extracted from my
"Learning how to learn" course notes and then some. Lack of time and
hurriness just makes it difficult to track but it should be under
version control already.
2021-07-21 16:28:07 +08:00

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Implementing Base16 themes in Hugo

Making use of Base16 themes would be a great way to let users customize their sites quickly. It is an established project that spawned related projects and a lot of user support for it. Let's implement this in Hugo for the same reason.

We'll make heavy use of CSS variables, Hugo data templates, and their support for several data formats including YAML.

To do that, we want to convert the Base16 theme…

scheme: "Bark on a tree"
author: "Gabriel Arazas (https://foo-dogsquared.github.io)"
base00: "2b221f"
base01: "412c26"
base02: "54352c"
base03: "8d5c4c"
base04: "e1bcb2"
base05: "f5ecea"
base06: "fefefe"
base07: "eb8a65"
base08: "d03e68"
base09: "eb914a"
base0A: "afa644"
base0B: "85b26e"
base0C: "df937a" #accent
base0D: "a15c40"
base0E: "8b7ab9"
base0F: "6f3920"

…into CSS.

[data-theme="Bark on a tree"]:root {
    --base00: #2b221f;
    --base01: #412c26;
    --base02: #54352c;
    --base03: #8d5c4c;
    --base04: #e1bcb2;
    --base05: #f5ecea;
    --base06: #fefefe;
    --base07: #eb8a65;
    --base08: #d03e68;
    --base09: #eb914a;
    --base0A: #afa644;
    --base0B: #85b26e;
    --base0C: #df937a;
    --base0D: #a15c40;
    --base0E: #8b7ab9;
    --base0F: #6f3920
}

Here's one template to do that.

{{- $name := index $ "name" -}}
{{- $scheme := index $ "scheme" -}}
{{- if ne $name "_index" }}[data-theme="{{ $scheme.scheme }}"]{{ end }}:root {
  {{- range $i := seq 0 15 }}
  {{- $hex := upper (printf "%02x" $i) }}
  {{- $key := printf "base%s" $hex }}
    --{{ $key }}: #{{ index $scheme $key }};
  {{- end -}}
}