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<description>Recent content on James&#39; Blog :-)</description>
<generator>Hugo -- gohugo.io</generator>
<language>en-GB</language>
<lastBuildDate>Tue, 25 Jun 2024 00:00:00 +0000</lastBuildDate>
<lastBuildDate>Mon, 11 Aug 2025 00:00:00 +0000</lastBuildDate>
<atom:link href="https://nonsense.dymc.win/index.xml" rel="self" type="application/rss+xml" />
<item>
<title>over-engineered (?) nixos blog deployment setup</title>
<link>https://nonsense.dymc.win/over-engineered-nixos-blog-deployment-setup/</link>
<pubDate>Mon, 11 Aug 2025 00:00:00 +0000</pubDate>
<guid>https://nonsense.dymc.win/over-engineered-nixos-blog-deployment-setup/</guid>
<description>&lt;p&gt;As is traditional with people hosting their own blog I&amp;rsquo;m going to do a post detailing EXACTLY how I&amp;rsquo;m hosting my blog.
Down to the last dirty detail.
I have nothing better to talk about.
Here is a diagram I edited to illustrate (credit to xkcd I think?).&lt;/p&gt;
&lt;p&gt;&lt;img src=&#34;https://nonsense.dymc.win/image/self-hosting.png&#34; alt=&#34;self-hosting&#34;&gt;&lt;/p&gt;
&lt;p&gt;I host my site on a hetzner vps running nixos.
I also have a git repo where all the static files for my blog live.
I had previously been manually rsyncing the website up to my vps from my laptop.
Qute an easy, efficient solution; it worked well.
But not very nixos; far too simple, not sufficiently over-engineered.
So in true nixos fashion I decided I&amp;rsquo;d spend a couple of hours sorting the problem so I&amp;rsquo;d maybe save a minute once a year when I write a blog post.&lt;/p&gt;
&lt;h3 id=&#34;remote-rebuilds&#34;&gt;Remote Rebuilds&lt;/h3&gt;
&lt;p&gt;First, I&amp;rsquo;ll show the fancy way to rebuild your remote nixos systems via ssh.
In my case, this means I can rebuild my hetzner box from my laptop.
You can read the wiki about it &lt;a href=&#34;https://wiki.nixos.org/wiki/Nixos-rebuild#Deploying_on_other_machines&#34;&gt;here&lt;/a&gt;.&lt;/p&gt;
&lt;p&gt;This sets up ssh with key-based authentication and lets our local user in.
This config belongs on the remote machine.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre tabindex=&#34;0&#34; class=&#34;chroma&#34;&gt;&lt;code class=&#34;language-nix&#34; data-lang=&#34;nix&#34;&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;n&#34;&gt;users&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;users&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;blog-king&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;openssh&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;authorizedKeys&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;keys&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;[&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;c1&#34;&gt;# ssh public key on computer you&amp;#39;re deploying from&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPzFa1hmmmmmPL5HvJZhXVEaWiZIMi34oR6AOcaaaaaaa&amp;#34;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;p&#34;&gt;];&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;n&#34;&gt;nix&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;settings&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;trusted-users&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;[&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;blog-king&amp;#34;&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;];&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;c1&#34;&gt;# ssh daemon&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;n&#34;&gt;services&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;openssh&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;{&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;enable&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;no&#34;&gt;true&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;openFirewall&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;no&#34;&gt;true&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;settings&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;{&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;PasswordAuthentication&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;no&#34;&gt;false&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;PermitRootLogin&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;no&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;p&#34;&gt;};&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;p&#34;&gt;};&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Once you have this going on your remote machine (in my case the hetzner vps) you should be able to rebuild the remote machine with &lt;code&gt;nixos-rebuild --target-host blog-king@remote-ip-here --ask-sudo-password switch&lt;/code&gt;.
The &lt;code&gt;--ask-sudo-password&lt;/code&gt; is not required if you ssh in as root though that would be a touch gauche.&lt;/p&gt;
&lt;h3 id=&#34;caddy&#34;&gt;Caddy&lt;/h3&gt;
&lt;p&gt;You can do this with whatever your preferred webserver is.
I am a caddy stan.
This opens the necessary ports in the firewall and sets up caddy in file server mode pointing at &lt;code&gt;/etc/blog&lt;/code&gt;.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre tabindex=&#34;0&#34; class=&#34;chroma&#34;&gt;&lt;code class=&#34;language-nix&#34; data-lang=&#34;nix&#34;&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;n&#34;&gt;networking&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;firewall&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;allowedTCPPorts&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;[&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;mi&#34;&gt;80&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;mi&#34;&gt;443&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;p&#34;&gt;];&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;n&#34;&gt;services&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;caddy&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;{&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;enable&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;no&#34;&gt;true&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;extraConfig&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s1&#34;&gt;&amp;#39;&amp;#39;
&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;s1&#34;&gt; blog.example.org {
&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;s1&#34;&gt; root * /etc/blog
&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;s1&#34;&gt; file_server
&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;s1&#34;&gt; }
&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;s1&#34;&gt; &amp;#39;&amp;#39;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;p&#34;&gt;};&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h3 id=&#34;getting-the-files-from-git&#34;&gt;Getting the files from git&lt;/h3&gt;
&lt;p&gt;We have a web server pointing at &lt;code&gt;/etc/blog&lt;/code&gt;.
The last piece of the puzzle is to get the static files from our git repo and spit them out in that directory.&lt;/p&gt;
&lt;p&gt;I&amp;rsquo;m using the &lt;code&gt;fetchFromGitea&lt;/code&gt; helper here which works for gitea and forgejo instances.
The &lt;code&gt;fetchFromGitHub&lt;/code&gt; helper would look very similar.&lt;/p&gt;
&lt;p&gt;You can get the &lt;code&gt;rev&lt;/code&gt; and &lt;code&gt;sha256&lt;/code&gt; of the commit using &lt;code&gt;nix-prefetch-git&lt;/code&gt;.&lt;/p&gt;
&lt;p&gt;Also note the little &lt;code&gt;/public&lt;/code&gt; at the end of the &lt;code&gt;source&lt;/code&gt; string.
That&amp;rsquo;s the directory of the git repo that the website source lives.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre tabindex=&#34;0&#34; class=&#34;chroma&#34;&gt;&lt;code class=&#34;language-nix&#34; data-lang=&#34;nix&#34;&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;n&#34;&gt;environment&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;etc&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;s2&#34;&gt;&amp;#34;blog&amp;#34;&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;{&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;enable&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;no&#34;&gt;true&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;target&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;blog&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;source&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;&lt;/span&gt;&lt;span class=&#34;si&#34;&gt;${&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;pkgs&lt;/span&gt;&lt;span class=&#34;o&#34;&gt;.&lt;/span&gt;&lt;span class=&#34;n&#34;&gt;fetchFromGitea&lt;/span&gt; &lt;span class=&#34;p&#34;&gt;{&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;domain&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;git.example.org&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;owner&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;james&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;repo&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;blog&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;rev&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;32d81f01388c88a259eed2ba52f4545dbcb1eb07&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;sha256&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;173g99dj8y4sw1v7f1s5f7zgcrrlr6dly9n6ysr2i4jg095lkxw8&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;p&#34;&gt;}&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;si&#34;&gt;}&lt;/span&gt;&lt;span class=&#34;s2&#34;&gt;/public&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;user&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;caddy&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt; &lt;span class=&#34;n&#34;&gt;group&lt;/span&gt; &lt;span class=&#34;o&#34;&gt;=&lt;/span&gt; &lt;span class=&#34;s2&#34;&gt;&amp;#34;caddy&amp;#34;&lt;/span&gt;&lt;span class=&#34;p&#34;&gt;;&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;span class=&#34;line&#34;&gt;&lt;span class=&#34;cl&#34;&gt;&lt;span class=&#34;p&#34;&gt;};&lt;/span&gt;
&lt;/span&gt;&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;So now with all that setup the blog post work flow is:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Commit rebuilt website to repo&lt;/li&gt;
&lt;li&gt;Update the &lt;code&gt;rev&lt;/code&gt; and &lt;code&gt;sha256&lt;/code&gt; to the new commit (this is annoying and I&amp;rsquo;m trying to work out a good way to automate it)&lt;/li&gt;
&lt;li&gt;Rebuild vps from laptop&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;Not necessarily faster than the old rsync method but it&amp;rsquo;s pretty damn declarative, that&amp;rsquo;s for sure.&lt;/p&gt;
</description>
</item>
<item>
<title>so you want to write a neovim plugin with lua</title>
<link>https://nonsense.dymc.win/so-you-want-to-write-a-neovim-plugin-with-lua/</link>