chore(tazjin): Move //web/blog & //web/homepage to my userdir

Change-Id: I96a2620ffb1d9e98a1d8ce7d97f2c4f58c2dbfd3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/603
Reviewed-by: tazjin <mail@tazj.in>

users/tazjin/homepage/default.nix

@@ -0,0 +1,72 @@
+# Assembles the website index and configures an nginx instance to
+# serve it.
+#
+# The website is made up of a simple header&footer and content
+# elements for things such as blog posts and projects.
+#
+# Content for the blog is in //web/blog instead of here.
+{ depot, lib, ... }:
+
+with depot;
+with nix.yants;
+
+let
+  inherit (builtins) readFile replaceStrings sort;
+  inherit (third_party) writeFile runCommandNoCC;
+
+  # The different types of entries on the homepage.
+  entryClass = enum "entryClass" [ "blog" "project" "misc" ];
+
+  # The definition of a single entry.
+  entry = struct "entry" {
+    class = entryClass;
+    title = string;
+    url = string;
+    date = int; # epoch
+    description = option string;
+  };
+
+  escape = replaceStrings [ "<" ">" "&" "'" ] [ "&lt;" "&gt;" "&amp;" "&#39;" ];
+
+  postToEntry = defun [ web.blog.post entry ] (post: {
+    class = "blog";
+    title = post.title;
+    url = "/blog/${post.key}";
+    date = post.date;
+  });
+
+  formatDate = defun [ int string ] (date: readFile (runCommandNoCC "date" {} ''
+    date --date='@${toString date}' '+%Y-%m-%d' > $out
+  ''));
+
+  formatEntryDate = defun [ entry string ] (entry: entryClass.match entry.class {
+    blog = "Blog post from ${formatDate entry.date}";
+    project = "Project from ${formatDate entry.date}";
+    misc = "Posted on ${formatDate entry.date}";
+  });
+
+  entryToDiv = defun [ entry string ] (entry: ''
+    <a href="${entry.url}" class="entry ${entry.class}">
+      <div>
+        <p class="entry-title">${escape entry.title}</p>
+        ${
+          lib.optionalString ((entry ? description) && (entry.description != null))
+          "<p class=\"entry-description\">${escape entry.description}</p>"
+        }
+        <p class="entry-date">${formatEntryDate entry}</p>
+      </div>
+    </a>
+  '');
+
+  index = entries: third_party.writeText "index.html" (lib.concatStrings (
+    [ (builtins.readFile ./header.html) ]
+    ++ (map entryToDiv (sort (a: b: a.date > b.date) entries))
+    ++ [ (builtins.readFile ./footer.html) ]
+  ));
+
+  homepage = index ((map postToEntry web.blog.posts) ++ (import ./entries.nix));
+in runCommandNoCC "website" {} ''
+  mkdir $out
+  cp ${homepage} $out/index.html
+  cp -r ${./static} $out/static
+''

users/tazjin/homepage/entries.nix

@@ -0,0 +1,64 @@
+[
+  {
+    class = "misc";
+    title = "The Virus Lounge";
+    url = "https://tvl.fyi";
+    date = 1587435629;
+    description = "A daily social video call in these trying pandemic times. Join us!";
+  }
+  {
+    class = "project";
+    title = "depot";
+    url = "https://code.tvl.fyi/about";
+    date = 1576800000;
+    description = "Merging all of my projects into a single, Nix-based monorepo";
+  }
+  {
+    class = "project";
+    title = "Nixery";
+    url = "https://github.com/google/nixery";
+    date = 1565132400;
+    description = "A Nix-backed container registry that builds container images on demand";
+  }
+  {
+    class = "project";
+    title = "kontemplate";
+    url = "https://code.tvl.fyi/about/ops/kontemplate";
+    date = 1486550940;
+    description = "Simple file templating tool built for Kubernetes resources";
+  }
+  {
+    class = "misc";
+    title = "dottime";
+    url = "https://dotti.me/";
+    date = 1560898800;
+    description = "A universal convention for conveying time (by edef <3)";
+  }
+  {
+    class = "project";
+    title = "journaldriver";
+    url = "https://code.tvl.fyi/about/ops/journaldriver";
+    date = 1527375600;
+    description = "Small daemon to forward logs from journald to Stackdriver Logging";
+  }
+  {
+    class = "misc";
+    title = "Principia Discordia";
+    url = "https://principiadiscordia.com/book/1.php";
+    date = 1495494000;
+    description = ''
+      The Principia is a short book I read as a child, and didn't
+      understand until much later. It shaped much of my world view.
+    '';
+  }
+  {
+    class = "misc";
+    title = "This Week in Virology";
+    url = "http://www.microbe.tv/twiv/";
+    date = 1585517557;
+    description = ''
+      Podcast with high-quality information about virology,
+      epidemiology and so on. Highly relevant to COVID19.
+    '';
+  }
+]

users/tazjin/homepage/footer.html

@@ -0,0 +1,2 @@
+  </div>
+</body>

users/tazjin/homepage/header.html

@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<head><meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="description" content="tazjin&#39;s blog">
+  <link rel="stylesheet" type="text/css" href="static/tazjin.css" media="all">
+  <link rel="icon" type="image/webp" href="/static/favicon.webp">
+  <title>tazjin&#39;s interblag</title>
+</head>
+<body class="dark">
+  <header>
+    <h1>
+      <a class="interblag-title" href="/">tazjin&#39;s interblag</a>
+    </h1>
+    <hr>
+  </header>
+  <div class="introduction">
+    <p>Hello, illuminated visitor.</p>
+    <p>
+      I'm tazjin. Usually you can find
+      me <a class="dark-link" href="https://git.tazj.in/about">programming computers</a>
+      using tools such as <a class="dark-link" href="https://nixos.org/nix">Nix</a>
+      and <a class="dark-link" href="https://www.gnu.org/software/emacs/">Emacs</a>,
+      cuddling <a class="dark-link" href="https://twitter.com/edefic">people I love</a>
+      or posting nonsense <a class="dark-link" href="https://twitter.com/tazjin">on the
+      internet</a>.
+    </p>
+    <p>
+      Below is a collection of
+      my <span class="project">projects</span>, <span class="blog">blog
+      posts</span> and some <span class="misc">random things</span> by
+      me or others. If you'd like to get in touch about anything, send
+      me a mail at mail@[this domain] or ping me on IRC or Twitter.
+    </p>
+  </div>
+  <div class="entry-container">

users/tazjin/homepage/static/tazjin.css

@@ -0,0 +1,183 @@
+/* Jetbrains Mono font from https://www.jetbrains.com/lp/mono/
+   licensed under Apache 2.0. Thanks, Jetbrains! */
+@font-face {
+    font-family: jetbrains-mono;
+    src: url(jetbrains-mono.woff2);
+}
+
+@font-face {
+    font-family: jetbrains-mono;
+    font-weight: bold;
+    src: url(jetbrains-mono-bold.woff2);
+}
+
+@font-face {
+    font-family: jetbrains-mono;
+    font-style: italic;
+    src: url(jetbrains-mono-italic.woff2);
+}
+
+@font-face {
+    font-family: jetbrains-mono;
+    font-weight: bold;
+    font-style: italic;
+    src: url(jetbrains-mono-bold-italic.woff2);
+}
+
+/* Generic-purpose styling */
+
+body {
+    max-width: 800px;
+    margin: 40px auto;
+    line-height: 1.6;
+    font-size: 18px;
+    padding: 0 10px;
+    font-family: jetbrains-mono, monospace;
+}
+
+p, a :not(.uncoloured-link) {
+    color: inherit;
+}
+
+h1, h2, h3 {
+    line-height: 1.2
+}
+
+/* Homepage styling */
+
+.dark {
+    background-color: #181818;
+    color: #e4e4ef;
+}
+
+.dark-link, .interblag-title {
+    color: #96a6c8;
+}
+
+.entry-container {
+    display: flex;
+    flex-direction: row;
+    flex-wrap: wrap;
+    justify-content: flex-start;
+}
+
+.interblag-title {
+    text-decoration: none;
+}
+
+.entry {
+    width: 42%;
+    margin: 5px;
+    padding-left: 7px;
+    padding-right: 5px;
+    border: 2px solid;
+    border-radius: 5px;
+    flex-grow: 1;
+    text-decoration: none;
+}
+
+.misc {
+    color: #73c936;
+    border-color: #73c936;
+}
+
+.blog {
+    color: #268bd2;
+    border-color: #268bd2;
+}
+
+.project {
+    color: #ff4f58;
+    border-color: #ff4f58;
+}
+
+.entry-title {
+    color: inherit !important;
+    font-weight: bold;
+    text-decoration: none;
+}
+
+.entry-date {
+    font-style: italic;
+}
+
+/* Blog styling */
+
+.light {
+    color: #383838;
+}
+
+.blog-title {
+    color: inherit;
+    text-decoration: none;
+}
+
+.footer {
+    text-align: right;
+}
+
+.date {
+    text-align: right;
+    font-style: italic;
+    float: right;
+}
+
+.inline {
+    display: inline;
+}
+
+.lod {
+    text-align: center;
+}
+
+.uncoloured-link {
+    color: inherit;
+}
+
+pre {
+    width: 100%;
+    overflow: auto;
+}
+
+img {
+    max-width: 100%;
+}
+
+.cheddar-callout {
+    display: block;
+    padding: 10px;
+}
+
+.cheddar-question {
+    color: #3367d6;
+    background-color: #e8f0fe;
+}
+
+.cheddar-todo {
+    color: #616161;
+    background-color: #eeeeee;
+}
+
+.cheddar-tip {
+    color: #00796b;
+    background-color: #e0f2f1;
+}
+
+.cheddar-warning {
+    color: #a52714;
+    background-color: #fbe9e7;
+}
+
+kbd {
+    background-color: #eee;
+    border-radius: 3px;
+    border: 1px solid #b4b4b4;
+    box-shadow: 0 1px 1px rgba(0, 0, 0, .2), 0 2px 0 0 rgba(255, 255, 255, .7) inset;
+    color: #333;
+    display: inline-block;
+    font-size: .85em;
+    font-weight: 700;
+    line-height: 1;
+    padding: 2px 4px;
+    white-space: nowrap;
+}