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<aside>ad-hoc container images - powered by <a href="https://nixos.org/nix/">Nix</a></aside>
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<p>
This is an instance
of <a href="https://github.com/google/nixery">Nixery</a>, which
provides the ability to pull ad-hoc container images from a
Docker-compatible registry server. The image names specify the
contents the image should contain, which are then retrieved and
built by the Nix package manager.
</p>
<p>
Nix is also responsible for the creation of the container images
themselves. To do this it uses an interesting layering strategy
described in
<a href="https://grahamc.com/blog/nix-and-layered-docker-images">this blog post</a>.
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<h3>How does it work?</h3>
<p>
Simply point your local Docker installation (or other compatible
registry client) at Nixery and ask for an image with the
contents you desire. Image contents are path separated in the
name, so for example if you needed an image that contains a
shell and <code>emacs</code> you could pull it as such:
</p>
<p>
<code>nixery.appspot.com/shell/emacs25-nox</code>
</p>
<p>
Image tags are currently ignored. Every package name needs to
correspond to a key in the
<a href="https://github.com/NixOS/nixpkgs/blob/master/pkgs/top-level/all-packages.nix">nixpkgs package set</a>.
</p>
<p>
The special meta-package <i>shell </i> provides default packages
you would expect in an interactive environment (such as an
interactively configured bash). If you use this package
you <b>must</b> specify it as the first package in an image.
</p>
<h3>FAQ</h3>
<ul>
<li>
<strong>Where is the source code for this?</strong>
<br>
Over <a href="https://github.com/google/nixery">on Github</a>.
</li>
<li>
<strong>Which revision of <code>nixpkgs</code> is used?</strong>
<br>
Nixery imports a Nix channel
via <code>builtins.fetchTarball</code>. Currently the channel
to which this instance is pinned is NixOS 19.03.
</li>
<li>
<strong>Is this an official Google project?</strong>
<br>
<strong>No.</strong> Nixery is not officially supported by
Google.
</li>
<li>
<strong>Can I depend on the demo instance in production?</strong>
<br>
<strong>No.</strong> The demo instance is just a demo. It
might go down, move, or disappear entirely at any point.
<br>
To make use of Nixery in your project, please deploy a private
instance. Stay tuned for instructions for how to do this on
GKE.
</li>
<li>
<strong>Who made this?</strong>
<br>
<a href="https://github.com/tazjin">tazjin</a>
</li>
</ul>
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