tvl-depot/users/tazjin/homepage/default.nix

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# 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 //users/tazjin/blog instead of here.
{ depot, lib, pkgs, ... }@args:
with depot;
with nix.yants;
let
inherit (builtins) readFile replaceStrings sort;
inherit (pkgs) 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: pkgs.writeText "index.html" (lib.concatStrings (
[ (builtins.readFile ./header.html) ]
++ (map entryToDiv (sort (a: b: a.date > b.date) entries))
++ [ (builtins.readFile ./footer.html) ]
));
pageEntries = import ./entries.nix;
homepage = index ((map postToEntry users.tazjin.blog.posts) ++ pageEntries);
atomFeed = import ./feed.nix (args // { inherit entry pageEntries; });
in
runCommandNoCC "website" { } ''
mkdir $out
cp ${homepage} $out/index.html
cp ${atomFeed} $out/feed.atom
mkdir $out/static
cp -r ${depot.web.static}/* $out/static
cp -rf ${./static}/* $out/static
''