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<ol class="chapter"><li class="chapter-item expanded "><a href="../index.html"><strong aria-hidden="true">1.</strong> Introduction</a></li><li class="chapter-item expanded "><a href="../doc/start/index.html"><strong aria-hidden="true">2.</strong> Quick Start</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../doc/start/iso.html"><strong aria-hidden="true">2.1.</strong> ISO</a></li><li class="chapter-item expanded "><a href="../doc/start/bootstrapping.html"><strong aria-hidden="true">2.2.</strong> Bootstrapping</a></li><li class="chapter-item expanded "><a href="../doc/start/from-nixos.html"><strong aria-hidden="true">2.3.</strong> From NixOS</a></li></ol></li><li class="chapter-item expanded "><a href="../doc/layout.html"><strong aria-hidden="true">3.</strong> Layout</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../cachix/index.html"><strong aria-hidden="true">3.1.</strong> Cachix</a></li><li class="chapter-item expanded "><a href="../extern/index.html"><strong aria-hidden="true">3.2.</strong> Extern</a></li><li class="chapter-item expanded "><a href="../hosts/index.html"><strong aria-hidden="true">3.3.</strong> Hosts</a></li><li class="chapter-item expanded "><a href="../lib/index.html"><strong aria-hidden="true">3.4.</strong> Lib</a></li><li class="chapter-item expanded "><a href="../modules/index.html"><strong aria-hidden="true">3.5.</strong> Modules</a></li><li class="chapter-item expanded "><a href="../overlays/index.html"><strong aria-hidden="true">3.6.</strong> Overlays</a></li><li class="chapter-item expanded "><a href="../overrides/index.html"><strong aria-hidden="true">3.7.</strong> Overrides</a></li><li class="chapter-item expanded "><a href="../pkgs/index.html"><strong aria-hidden="true">3.8.</strong> Packages</a></li><li class="chapter-item expanded "><a href="../profiles/index.html" class="active"><strong aria-hidden="true">3.9.</strong> Profiles</a></li><li class="chapter-item expanded "><a href="../secrets/index.html"><strong aria-hidden="true">3.10.</strong> Secrets</a></li><li class="chapter-item expanded "><a href="../suites/index.html"><strong aria-hidden="true">3.11.</strong> Suites</a></li><li class="chapter-item expanded "><a href="../tests/index.html"><strong aria-hidden="true">3.12.</strong> Tests</a></li><li class="chapter-item expanded "><a href="../users/index.html"><strong aria-hidden="true">3.13.</strong> Users</a></li></ol></li><li class="chapter-item expanded "><a href="../doc/flk/index.html"><strong aria-hidden="true">4.</strong> flk</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../doc/flk/up.html"><strong aria-hidden="true">4.1.</strong> up</a></li><li class="chapter-item expanded "><a href="../doc/flk/update.html"><strong aria-hidden="true">4.2.</strong> update</a></li><li class="chapter-item expanded "><a href="../doc/flk/get.html"><strong aria-hidden="true">4.3.</strong> get</a></li><li class="chapter-item expanded "><a href="../doc/flk/iso.html"><strong aria-hidden="true">4.4.</strong> iso</a></li><li class="chapter-item expanded "><a href="../doc/flk/install.html"><strong aria-hidden="true">4.5.</strong> install</a></li><li class="chapter-item expanded "><a href="../doc/flk/home.html"><strong aria-hidden="true">4.6.</strong> home</a></li></ol></li><li class="chapter-item expanded "><a href="../doc/integrations/index.html"><strong aria-hidden="true">5.</strong> Integrations</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../doc/integrations/deploy.html"><strong aria-hidden="true">5.1.</strong> Deploy RS</a></li><li class="chapter-item expanded "><a href="../doc/integrations/hercules.html"><strong aria-hidden="true">5.2.</strong> Hercules CI</a></li></ol></li><li class="chapter-item expanded "><a href="../doc/index.html"><strong aria-hidden="true">6.</strong> Contributing</a></li></ol>
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<main>
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<h1 id="profiles"><a class="header" href="#profiles">Profiles</a></h1>
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<p>Profiles are a convenient shorthand for the <a href="https://nixos.org/manual/nixos/stable/index.html#sec-option-definitions"><em>definition</em></a> of
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<a href="https://nixos.org/manual/nixos/stable/index.html#sec-writing-modules">options</a> in contrast to their <a href="https://nixos.org/manual/nixos/stable/index.html#sec-option-declarations"><em>declaration</em></a>. They're
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built into the NixOS module system for a reason: to elegantly provide a clear
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separation of concerns.</p>
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<p>If you need guidance, a community <a href="https://github.com/divnix/devos/tree/community/profiles">branch</a>
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is maintained to help get up to speed on their usage.</p>
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<h2 id="constraints"><a class="header" href="#constraints">Constraints</a></h2>
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<p>For the sake of consistency, a profile should always be defined in a
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<em><strong>default.nix</strong></em> containing a <a href="https://nixos.wiki/wiki/Module#structure">nixos module config</a>.
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A profile's directory is used for quick modularization of
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<a href="./#subprofiles">interelated bits</a>.</p>
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<blockquote>
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<h5 id="notes"><a class="header" href="#notes"><em>Notes:</em></a></h5>
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<ul>
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<li>For <em>declaring</em> module options, there's the <a href="../modules">modules</a> directory.</li>
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<li>This directory takes inspiration from
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<a href="https://github.com/NixOS/nixpkgs/tree/master/nixos/modules/profiles">upstream</a>
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.</li>
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<li>Sticking to a simple <a href="https://github.com/divnix/devos/tree/core/lib/devos/mkProfileAttrs.nix">spec</a> has refreshing advantages.
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<a href="../doc/integrations/hercules.html">hercules-ci</a> expects all profiles to be
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defined in a <em><strong>default.nix</strong></em>, allowing them to be built automatically when
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added. Congruently, <a href="../suites">suites</a> expect <em><strong>default.nix</strong></em> to avoid
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having to manage their paths manually.</li>
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</ul>
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</blockquote>
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<h2 id="subprofiles"><a class="header" href="#subprofiles">Subprofiles</a></h2>
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<p>Profiles can also define subprofiles. They follow the same constraints outlined
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above. A good top level profile should be a high level concern, such as your
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personal development environment while the subprofiles should be more focused
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program configurations such as your text editor, and shell configs. This way,
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you can either pull in the whole development profile, or pick and choose
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individual programs.</p>
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<h3 id="example"><a class="header" href="#example">Example</a></h3>
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<p>profiles/develop/default.nix:</p>
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<pre><code class="language-nix">{
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imports = [ ./zsh ];
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# some generic development concerns ...
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}
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</code></pre>
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<p>profiles/develop/zsh/default.nix:</p>
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<pre><code class="language-nix">{ ... }:
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{
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programs.zsh.enable = true;
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# zsh specific options ...
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}
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</code></pre>
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<h2 id="conclusion"><a class="header" href="#conclusion">Conclusion</a></h2>
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<p>Profiles are the most important concept in DevOS. They allow us to keep our
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Nix expressions self contained and modular. This way we can maximize reuse
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across hosts while minimizing boilerplate. Remember, anything machine
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specific belongs in your <a href="../hosts">host</a> files instead.</p>
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