gitea: Jupyter notebook rendering

roles/gitea/files/convert-ipynb.sh

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+#!/usr/bin/env sh
+exec pandoc --mathjax --from ipynb --to html

roles/gitea/files/custom/public/css/jupyter.css

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+/* Taken from Pandoc --standalone CSS. */
+.markup.jupyter pre > code.sourceCode { white-space: pre; position: relative; }
+.markup.jupyter pre > code.sourceCode > span { display: inline-block; line-height: 1.25; }
+.markup.jupyter pre > code.sourceCode > span:empty { height: 1.2em; }
+.markup.jupyter .sourceCode { overflow: visible; }
+.markup.jupyter code.sourceCode > span { color: inherit; text-decoration: inherit; }
+.markup.jupyter div.sourceCode { margin: 1em 0; }
+.markup.jupyter pre.sourceCode { margin: 0; }
+                @media screen {
+.markup.jupyter     div.sourceCode { overflow: auto; }
+                }
+                @media print {
+.markup.jupyter     pre > code.sourceCode { white-space: pre-wrap; }
+.markup.jupyter     pre > code.sourceCode > span { text-indent: -5em; padding-left: 5em; }
+                }
+.markup.jupyter pre.numberSource code
+                  { counter-reset: source-line 0; }
+.markup.jupyter pre.numberSource code > span
+                  { position: relative; left: -4em; counter-increment: source-line; }
+.markup.jupyter pre.numberSource code > span > a:first-child::before
+                  { content: counter(source-line);
+                    position: relative; left: -1em; text-align: right; vertical-align: baseline;
+                    border: none; display: inline-block;
+                    -webkit-touch-callout: none; -webkit-user-select: none;
+                    -khtml-user-select: none; -moz-user-select: none;
+                    -ms-user-select: none; user-select: none;
+                    padding: 0 4px; width: 4em;
+                    color: #aaaaaa;
+                  }
+.markup.jupyter pre.numberSource { margin-left: 3em; border-left: 1px solid #aaaaaa;  padding-left: 4px; }
+.markup.jupyter div.sourceCode
+                  {   }
+                @media screen {
+.markup.jupyter     pre > code.sourceCode > span > a:first-child::before { text-decoration: underline; }
+                }
+.markup.jupyter code span.al { color: #ff0000; font-weight: bold; } /* Alert */
+.markup.jupyter code span.an { color: #60a0b0; font-weight: bold; font-style: italic; } /* Annotation */
+.markup.jupyter code span.at { color: #7d9029; } /* Attribute */
+.markup.jupyter code span.bn { color: #40a070; } /* BaseN */
+.markup.jupyter code span.bu { color: #008000; } /* BuiltIn */
+.markup.jupyter code span.cf { color: #007020; font-weight: bold; } /* ControlFlow */
+.markup.jupyter code span.ch { color: #4070a0; } /* Char */
+.markup.jupyter code span.cn { color: #880000; } /* Constant */
+.markup.jupyter code span.co { color: #60a0b0; font-style: italic; } /* Comment */
+.markup.jupyter code span.cv { color: #60a0b0; font-weight: bold; font-style: italic; } /* CommentVar */
+.markup.jupyter code span.do { color: #ba2121; font-style: italic; } /* Documentation */
+.markup.jupyter code span.dt { color: #902000; } /* DataType */
+.markup.jupyter code span.dv { color: #40a070; } /* DecVal */
+.markup.jupyter code span.er { color: #ff0000; font-weight: bold; } /* Error */
+.markup.jupyter code span.ex { } /* Extension */
+.markup.jupyter code span.fl { color: #40a070; } /* Float */
+.markup.jupyter code span.fu { color: #06287e; } /* Function */
+.markup.jupyter code span.im { color: #008000; font-weight: bold; } /* Import */
+.markup.jupyter code span.in { color: #60a0b0; font-weight: bold; font-style: italic; } /* Information */
+.markup.jupyter code span.kw { color: #007020; font-weight: bold; } /* Keyword */
+.markup.jupyter code span.op { color: #666666; } /* Operator */
+.markup.jupyter code span.ot { color: #007020; } /* Other */
+.markup.jupyter code span.pp { color: #bc7a00; } /* Preprocessor */
+.markup.jupyter code span.sc { color: #4070a0; } /* SpecialChar */
+.markup.jupyter code span.ss { color: #bb6688; } /* SpecialString */
+.markup.jupyter code span.st { color: #4070a0; } /* String */
+.markup.jupyter code span.va { color: #19177c; } /* Variable */
+.markup.jupyter code span.vs { color: #4070a0; } /* VerbatimString */
+.markup.jupyter code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */

roles/gitea/files/custom/templates/custom/header.tmpl

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+<!-- This file must exist to be extended for different purposes. -->

roles/gitea/tasks/jupyter.yml

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+---
+- name: install packages
+  package:
+    name:
+    - jupyter-nbconvert
+
+- name: install Jupyter conversion script
+  copy:
+    src: 'convert-ipynb.sh'
+    dest: '/usr/local/bin/convert-ipynb'
+    mode: 0755
+
+- name: ensure Jupyter assets on all pages
+  blockinfile:
+    path: '/var/lib/gitea/custom/templates/custom/header.tmpl'
+    block: |
+      <link
+        rel="stylesheet"
+        href="{{ "{{ AppSubUrl }}" }}/assets/css/jupyter.css"
+      />
+      <script
+        src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml-full.js"
+        type="text/javascript">
+      </script>
+    marker: '<!-- {mark} ANSIBLE MANAGED BLOCK: Jupyter -->'
+  notify: 'restart Gitea'
+
+- name: configure Gitea
+  blockinfile:
+    path: '/etc/gitea/app.ini'
+    block: |
+      [markup.jupyter]
+      ENABLED = true
+      FILE_EXTENSIONS = .ipynb
+      RENDER_COMMAND = /usr/local/bin/convert-ipynb
+      IS_INPUT_FILE = false
+    marker: '# {mark} ANSIBLE MANAGED BLOCK: Jupyter'
+  notify: 'restart Gitea'

roles/gitea/tasks/main.yml

@@ -1,3 +1,4 @@
 ---
 - include_tasks: 'gitea.yml'
+- include_tasks: 'jupyter.yml'
 - include_tasks: 'pptx.yml'