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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
|||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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<a href="../../../Nixpkgs/" class="md-tabs__link">
|
|||
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|
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|
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|
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|
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Nixpkgs
|
|||
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|
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|
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|
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|
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|
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|
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</nav>
|
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|
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|
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|
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|
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<main class="md-main" data-md-component="main">
|
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<div class="md-main__inner md-grid">
|
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|
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|
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|
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|
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<div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
|
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|
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<div class="md-sidebar__scrollwrap">
|
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<div class="md-sidebar__inner">
|
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|
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|
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|
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|
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|
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|
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|
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<nav class="md-nav md-nav--primary md-nav--lifted" aria-label="Navigation" data-md-level="0">
|
|||
|
|
<label class="md-nav__title" for="__drawer">
|
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|
|
<a href="../../.." title="Aux Docs" class="md-nav__button md-logo" aria-label="Aux Docs" data-md-component="logo">
|
|||
|
|
|
|||
|
|
<img src="../../../assets/aux-logo.svg" alt="logo">
|
|||
|
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|
|||
|
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</a>
|
|||
|
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Aux Docs
|
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|
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</label>
|
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|
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|
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<div class="md-nav__source">
|
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|
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<a href="https://git.auxolotl.org/auxolotl/docs" title="Go to repository" class="md-source" data-md-component="source">
|
|||
|
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<div class="md-source__icon md-icon">
|
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|
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|
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M16.777 0a2.9 2.9 0 1 1-2.529 4.322H12.91a4.266 4.266 0 0 0-4.265 4.195v2.118a7.076 7.076 0 0 1 4.147-1.42l.118-.002h1.338a2.9 2.9 0 0 1 5.43 1.422 2.9 2.9 0 0 1-5.43 1.422H12.91a4.266 4.266 0 0 0-4.265 4.195v2.319A2.9 2.9 0 0 1 7.222 24 2.9 2.9 0 0 1 5.8 18.57V8.589a7.109 7.109 0 0 1 6.991-7.108l.118-.001h1.338A2.9 2.9 0 0 1 16.778 0ZM7.223 19.905a1.194 1.194 0 1 0 0 2.389 1.194 1.194 0 0 0 0-2.389Zm9.554-10.464a1.194 1.194 0 1 0 0 2.389 1.194 1.194 0 0 0 0-2.39Zm0-7.735a1.194 1.194 0 1 0 0 2.389 1.194 1.194 0 0 0 0-2.389Z"/></svg>
|
|||
|
|
</div>
|
|||
|
|
<div class="md-source__repository">
|
|||
|
|
auxolotl/docs
|
|||
|
|
</div>
|
|||
|
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</a>
|
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|
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</div>
|
|||
|
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|
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|
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<ul class="md-nav__list" data-md-scrollfix>
|
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|
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|
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|
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|
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|
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|
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<a href="../../.." class="md-nav__link">
|
|||
|
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|
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|
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|
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|
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<span class="md-ellipsis">
|
|||
|
|
Aux Documentation Hub
|
|||
|
|
</span>
|
|||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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<span class="md-ellipsis">
|
|||
|
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TODO
|
|||
|
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|
|||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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<a href="../../../Aux/" class="md-nav__link">
|
|||
|
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|
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|
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|
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|
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<span class="md-ellipsis">
|
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|
|
Aux
|
|||
|
|
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|
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|
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|
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|
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<span class="md-nav__icon md-icon"></span>
|
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|
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|
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|
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|
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|
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|
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|
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<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4" checked>
|
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|
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|
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|
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<div class="md-nav__link md-nav__container">
|
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<a href="../../" class="md-nav__link ">
|
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|
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|
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|
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<span class="md-ellipsis">
|
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Lix
|
|||
|
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|
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|
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|
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|
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</a>
|
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|
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|
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<label class="md-nav__link " for="__nav_4" id="__nav_4_label" tabindex="">
|
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|
|
<span class="md-nav__icon md-icon"></span>
|
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|
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</label>
|
|||
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|
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|
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</div>
|
|||
|
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|
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|
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="true">
|
|||
|
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<label class="md-nav__title" for="__nav_4">
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
Lix
|
|||
|
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</label>
|
|||
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
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|
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|
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|
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<li class="md-nav__item">
|
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|
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<a href="../../glossary/" class="md-nav__link">
|
|||
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|
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|
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|
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|
|
<span class="md-ellipsis">
|
|||
|
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Glossary
|
|||
|
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</span>
|
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|
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|
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</a>
|
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|
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|
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<li class="md-nav__item">
|
|||
|
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<a href="../../quick-start/" class="md-nav__link">
|
|||
|
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|
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|
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|
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|
|
<span class="md-ellipsis">
|
|||
|
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Quick Start
|
|||
|
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</span>
|
|||
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|
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|
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</a>
|
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|
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|
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|
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|
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|
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|
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|
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<span class="md-ellipsis">
|
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Advanced Topics
|
|||
|
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</span>
|
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|
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|
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|
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<span class="md-nav__icon md-icon"></span>
|
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|
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|
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|
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|
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|
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<span class="md-ellipsis">
|
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Command Reference
|
|||
|
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|
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|
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|
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|
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|
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|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<a href="../../Package-Management/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Package Management
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<a href="../../architecture/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Architecture
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<li class="md-nav__item md-nav__item--active md-nav__item--nested">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_8" checked>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<div class="md-nav__link md-nav__container">
|
|||
|
|
<a href="../" class="md-nav__link ">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Contributing
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
|
|||
|
|
<label class="md-nav__link " for="__nav_4_8" id="__nav_4_8_label" tabindex="0">
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
</label>
|
|||
|
|
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_8_label" aria-expanded="true">
|
|||
|
|
<label class="md-nav__title" for="__nav_4_8">
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
Contributing
|
|||
|
|
</label>
|
|||
|
|
<ul class="md-nav__list" data-md-scrollfix>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<li class="md-nav__item md-nav__item--active">
|
|||
|
|
|
|||
|
|
<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<label class="md-nav__link md-nav__link--active" for="__toc">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
CLI guideline
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
</label>
|
|||
|
|
|
|||
|
|
<a href="./" class="md-nav__link md-nav__link--active">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
CLI guideline
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<label class="md-nav__title" for="__toc">
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
Table of contents
|
|||
|
|
</label>
|
|||
|
|
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#goals" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Goals
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#overview" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Overview
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#naming-the-commands" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Naming the COMMANDS
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Naming the COMMANDS">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#naming-rules" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Naming rules
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#classification" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Classification
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#help-is-essential" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Help is essential
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Help is essential">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#looking-for-help" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Looking for help
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#anticipate-where-help-is-needed" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Anticipate where help is needed
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Anticipate where help is needed">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#shell-completion" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Shell completion
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#wrong-input" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Wrong input
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#next-steps" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Next steps
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#educate-the-user" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Educate the user
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#input" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Input
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Input">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#naming-the-options" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Naming the OPTIONS
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#prompt-when-input-not-provided" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Prompt when input not provided
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#output" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Output
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Output">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#follow-best-practices" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Follow best practices
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#errors-wip" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Errors (WIP)
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#not-only-for-humans" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Not only for humans
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#returning-future-proof-json" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Returning future proof JSON
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Returning future proof JSON">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#examples" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Examples
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#dialog-with-the-user" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Dialog with the user
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#text-alignment" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Text alignment
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#dim-bright" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Dim / Bright
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#colors" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Colors
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#special-unicode-characters" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Special (Unicode) characters
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#emojis" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Emojis
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
|||
|
|
</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#tables" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Tables
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
|||
|
|
</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#interactive-output" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Interactive output
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Interactive output">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#progress" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Progress
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#search" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Search
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#prompt" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Prompt
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#verbosity" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Verbosity
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#appendix-1-commands-naming-exceptions" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Appendix 1: Commands naming exceptions
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="../cxx/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
C++ style guide
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
</li>
|
|||
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|
|||
|
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|
|||
|
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|
|||
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|
|||
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|
|||
|
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|
|||
|
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|
|||
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|
|||
|
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|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="../experimental-features/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
What are experimental features?
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
</li>
|
|||
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|
|||
|
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|
|||
|
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|
|||
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
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|
|||
|
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|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="../hacking/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Hacking
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
</li>
|
|||
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|
|||
|
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|
|||
|
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|
|||
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|
|||
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="../testing/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Running tests
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
|
|||
|
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|
|||
|
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|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
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|
|||
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|
|||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
|||
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|
|||
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|
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|
|||
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|
|||
|
|
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
|||
|
|
|
|||
|
|
|
|||
|
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|
|||
|
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|
|||
|
|
<a href="../../installation/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Installation
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
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|
|||
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|
|||
|
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|
|||
|
|
</li>
|
|||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
|||
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|
|||
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|
|||
|
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|
|||
|
|
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
|||
|
|
|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
|
<a href="../../language/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Language
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
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|
|||
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|
|||
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|
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|
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</li>
|
|||
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|
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|
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|
|||
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|
|||
|
|
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
|||
|
|
|
|||
|
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|
|||
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|
|||
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|
|||
|
|
<a href="../../protocols/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Protocols
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
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|
|||
|
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</a>
|
|||
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|
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|
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|
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|
|||
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|
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|
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|
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|
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<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
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|
|||
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|
|||
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|
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|
|||
|
|
<a href="../../release-notes/" class="md-nav__link">
|
|||
|
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|
|||
|
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|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Release notes
|
|||
|
|
</span>
|
|||
|
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|
|||
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|
|||
|
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|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
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|
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|
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</a>
|
|||
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|
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|
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|
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|
|||
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|
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|
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|
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</ul>
|
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</nav>
|
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|
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</li>
|
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|
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|
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|
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|
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|
|
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<a href="../../../NixOS/appstream/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
NixOS
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</li>
|
|||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
|||
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|
|||
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|
|||
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|
|||
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|
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|
|||
|
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|
|||
|
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|
|||
|
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|
|||
|
|
|
|||
|
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|
|||
|
|
|
|||
|
|
|
|||
|
|
<li class="md-nav__item md-nav__item--pruned md-nav__item--nested">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<a href="../../../Nixpkgs/" class="md-nav__link">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Nixpkgs
|
|||
|
|
</span>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
|
|||
|
|
<div class="md-sidebar__scrollwrap">
|
|||
|
|
<div class="md-sidebar__inner">
|
|||
|
|
|
|||
|
|
|
|||
|
|
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<label class="md-nav__title" for="__toc">
|
|||
|
|
<span class="md-nav__icon md-icon"></span>
|
|||
|
|
Table of contents
|
|||
|
|
</label>
|
|||
|
|
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#goals" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Goals
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#overview" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Overview
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#naming-the-commands" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Naming the COMMANDS
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Naming the COMMANDS">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#naming-rules" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Naming rules
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#classification" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Classification
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#help-is-essential" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Help is essential
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Help is essential">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#looking-for-help" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Looking for help
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#anticipate-where-help-is-needed" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Anticipate where help is needed
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Anticipate where help is needed">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#shell-completion" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Shell completion
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#wrong-input" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Wrong input
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#next-steps" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Next steps
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#educate-the-user" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Educate the user
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#input" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Input
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Input">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#naming-the-options" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Naming the OPTIONS
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#prompt-when-input-not-provided" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Prompt when input not provided
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#output" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Output
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Output">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#follow-best-practices" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Follow best practices
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#errors-wip" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Errors (WIP)
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#not-only-for-humans" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Not only for humans
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#returning-future-proof-json" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Returning future proof JSON
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Returning future proof JSON">
|
|||
|
|
<ul class="md-nav__list">
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#examples" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Examples
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#dialog-with-the-user" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Dialog with the user
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#text-alignment" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Text alignment
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#dim-bright" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Dim / Bright
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
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|
|||
|
|
</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#colors" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Colors
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
|||
|
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</li>
|
|||
|
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|
|||
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<li class="md-nav__item">
|
|||
|
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<a href="#special-unicode-characters" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Special (Unicode) characters
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
|||
|
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</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#emojis" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Emojis
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
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<li class="md-nav__item">
|
|||
|
|
<a href="#tables" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Tables
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
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|
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</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#interactive-output" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Interactive output
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
<nav class="md-nav" aria-label="Interactive output">
|
|||
|
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<ul class="md-nav__list">
|
|||
|
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|
|||
|
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<li class="md-nav__item">
|
|||
|
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<a href="#progress" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Progress
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
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|
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</li>
|
|||
|
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|
|||
|
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<li class="md-nav__item">
|
|||
|
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<a href="#search" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Search
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
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|
|||
|
|
</li>
|
|||
|
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|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#prompt" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Prompt
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#verbosity" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Verbosity
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
</nav>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
<li class="md-nav__item">
|
|||
|
|
<a href="#appendix-1-commands-naming-exceptions" class="md-nav__link">
|
|||
|
|
<span class="md-ellipsis">
|
|||
|
|
Appendix 1: Commands naming exceptions
|
|||
|
|
</span>
|
|||
|
|
</a>
|
|||
|
|
|
|||
|
|
</li>
|
|||
|
|
|
|||
|
|
</ul>
|
|||
|
|
|
|||
|
|
</nav>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<div class="md-content" data-md-component="content">
|
|||
|
|
<article class="md-content__inner md-typeset">
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<h1 id="cli-guideline">CLI guideline</h1>
|
|||
|
|
<h3 id="goals">Goals</h3>
|
|||
|
|
<p>Purpose of this document is to provide a clear direction to <strong>help design
|
|||
|
|
delightful command line</strong> experience. This document contains guidelines to
|
|||
|
|
follow to ensure a consistent and approachable user experience.</p>
|
|||
|
|
<h3 id="overview">Overview</h3>
|
|||
|
|
<p><code>nix</code> command provides a single entry to a number of sub-commands that help
|
|||
|
|
<strong>developers and system administrators</strong> in the life-cycle of a software
|
|||
|
|
project. We particularly need to pay special attention to help and assist new
|
|||
|
|
users of Lix.</p>
|
|||
|
|
<h2 id="naming-the-commands">Naming the <code>COMMANDS</code></h2>
|
|||
|
|
<p>Words matter. Naming is an important part of the usability. Users will be
|
|||
|
|
interacting with Lix on a regular basis so we should <strong>name things for ease of
|
|||
|
|
understanding</strong>.</p>
|
|||
|
|
<p>We recommend following the <a href="https://en.wikipedia.org/wiki/Principle_of_least_astonishment">Principle of Least
|
|||
|
|
Astonishment</a>.
|
|||
|
|
This means that you should <strong>never use acronyms or abbreviations</strong> unless they
|
|||
|
|
are commonly used in other tools (e.g. <code>nix init</code>). And if the command name is
|
|||
|
|
too long (> 10-12 characters) then shortening it makes sense (e.g.
|
|||
|
|
“prioritization” → “priority”).</p>
|
|||
|
|
<p>Commands should <strong>follow a noun-verb dialogue</strong>. Although noun-verb formatting
|
|||
|
|
seems backwards from a speaking perspective (i.e. <code>nix store copy</code> vs. <code>nix
|
|||
|
|
copy store</code>) it allows us to organize commands the same way users think about
|
|||
|
|
completing an action (the group first, then the command).</p>
|
|||
|
|
<h3 id="naming-rules">Naming rules</h3>
|
|||
|
|
<p>Rules are there to guide you by limiting your options. But not everything can
|
|||
|
|
fit the rules all the time. In those cases document the exceptions in <a href="#appendix-1-commands-naming-exceptions">Appendix
|
|||
|
|
1: Commands naming exceptions</a> and
|
|||
|
|
provide reason. The rules want to force a Nix developer to look, not just at
|
|||
|
|
the command at hand, but also the command in a full context alongside other
|
|||
|
|
<code>nix</code> commands.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span><span class="o">[</span><GROUP><span class="o">]</span><span class="w"> </span><COMMAND><span class="w"> </span><span class="o">[</span><ARGUMENTS><span class="o">]</span><span class="w"> </span><span class="o">[</span><OPTIONS><span class="o">]</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<ul>
|
|||
|
|
<li><code>GROUP</code>, <code>COMMAND</code>, <code>ARGUMENTS</code> and <code>OPTIONS</code> should be lowercase and in a
|
|||
|
|
singular form.</li>
|
|||
|
|
<li><code>GROUP</code> should be a <strong>NOUN</strong>.</li>
|
|||
|
|
<li><code>COMMAND</code> should be a <strong>VERB</strong>.</li>
|
|||
|
|
<li><code>ARGUMENTS</code> and <code>OPTIONS</code> are discussed in <a href="#input"><em>Input</em> section</a>.</li>
|
|||
|
|
</ul>
|
|||
|
|
<h3 id="classification">Classification</h3>
|
|||
|
|
<p>Some commands are more important, some less. While we want all of our commands
|
|||
|
|
to be perfect we can only spend limited amount of time testing and improving
|
|||
|
|
them.</p>
|
|||
|
|
<p>This classification tries to separate commands in 3 categories in terms of
|
|||
|
|
their importance in regards to the new users. Users who are likely to be
|
|||
|
|
impacted the most by bad user experience.</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><strong>Main commands</strong></li>
|
|||
|
|
</ul>
|
|||
|
|
<p>Commands used for our main use cases and most likely used by new users. We
|
|||
|
|
expect attention to details, such as:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>- Proper use of [colors](#colors), [emojis](#special-unicode-characters)
|
|||
|
|
and [aligning of text](#text-alignment).
|
|||
|
|
- [Autocomplete](#shell-completion) of options.
|
|||
|
|
- Show [next possible steps](#next-steps).
|
|||
|
|
- Showing some [“tips”](#educate-the-user) when running logs running tasks
|
|||
|
|
(eg. building / downloading) in order to teach users interesting bits of
|
|||
|
|
Nix ecosystem.
|
|||
|
|
- [Help pages](#help-is-essential) to be as good as we can write them
|
|||
|
|
pointing to external documentation and tutorials for more.
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Examples of such commands: <code>nix init</code>, <code>nix develop</code>, <code>nix build</code>, <code>nix run</code>,
|
|||
|
|
...</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><strong>Infrequently used commands</strong></li>
|
|||
|
|
</ul>
|
|||
|
|
<p>From infrequently used commands we expect less attention to details, but
|
|||
|
|
still some:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>- Proper use of [colors](#colors), [emojis](#special-unicode-characters)
|
|||
|
|
and [aligning of text](#text-alignment).
|
|||
|
|
- [Autocomplete](#shell-completion) of options.
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Examples of such commands: <code>nix doctor</code>, <code>nix edit</code>, <code>nix eval</code>, ...</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><strong>Utility and scripting commands</strong></li>
|
|||
|
|
</ul>
|
|||
|
|
<p>Commands that expose certain internal functionality of <code>nix</code>, mostly used by
|
|||
|
|
other scripts.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>- [Autocomplete](#shell-completion) of options.
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Examples of such commands: <code>nix store copy</code>, <code>nix hash base16</code>, <code>nix store
|
|||
|
|
ping</code>, ...</p>
|
|||
|
|
<h2 id="help-is-essential">Help is essential</h2>
|
|||
|
|
<p>Help should be built into your command line so that new users can gradually
|
|||
|
|
discover new features when they need them.</p>
|
|||
|
|
<h3 id="looking-for-help">Looking for help</h3>
|
|||
|
|
<p>Since there is no standard way how user will look for help we rely on ways help
|
|||
|
|
is provided by commonly used tools. As a guide for this we took <code>git</code> and
|
|||
|
|
whenever in doubt look at it as a preferred direction.</p>
|
|||
|
|
<p>The rules are:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>Help is shown by using <code>--help</code> or <code>help</code> command (eg <code>nix</code> <code>--``help</code> or
|
|||
|
|
<code>nix help</code>).</li>
|
|||
|
|
<li>For non-COMMANDs (eg. <code>nix</code> <code>--``help</code> and <code>nix store</code> <code>--``help</code>) we <strong>show
|
|||
|
|
a summary</strong> of most common use cases. Summary is presented on the STDOUT
|
|||
|
|
without any use of PAGER.</li>
|
|||
|
|
<li>For COMMANDs (eg. <code>nix init</code> <code>--``help</code> or <code>nix help init</code>) we display the
|
|||
|
|
man page of that command. By default the PAGER is used (as in <code>git</code>).</li>
|
|||
|
|
<li>At the end of either summary or man page there should be an URL pointing to
|
|||
|
|
an online version of more detailed documentation.</li>
|
|||
|
|
<li>The structure of summaries and man pages should be the same as in <code>git</code>.</li>
|
|||
|
|
</ul>
|
|||
|
|
<h3 id="anticipate-where-help-is-needed">Anticipate where help is needed</h3>
|
|||
|
|
<p>Even better then requiring the user to search for help is to anticipate and
|
|||
|
|
predict when user might need it. Either because the lack of discoverability,
|
|||
|
|
typo in the input or simply taking the opportunity to teach the user of
|
|||
|
|
interesting - but less visible - details.</p>
|
|||
|
|
<h4 id="shell-completion">Shell completion</h4>
|
|||
|
|
<p>This type of help is most common and almost expected by users. We need to
|
|||
|
|
<strong>provide the best shell completion</strong> for <code>bash</code>, <code>zsh</code> and <code>fish</code>.</p>
|
|||
|
|
<p>Completion needs to be <strong>context aware</strong>, this mean when a user types:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>build<span class="w"> </span>n<TAB>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>we need to display a list of flakes starting with <code>n</code>.</p>
|
|||
|
|
<h4 id="wrong-input">Wrong input</h4>
|
|||
|
|
<p>As we all know we humans make mistakes, all the time. When a typo - intentional
|
|||
|
|
or unintentional - is made, we should prompt for closest possible options or
|
|||
|
|
point to the documentation which would educate user to not make the same
|
|||
|
|
errors. Here are few examples:</p>
|
|||
|
|
<p>In first example we prompt the user for typing wrong command name:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>int
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Error!<span class="w"> </span>Command<span class="w"> </span><span class="sb">`</span>int<span class="sb">`</span><span class="w"> </span>not<span class="w"> </span>found.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Did<span class="w"> </span>you<span class="w"> </span>mean:
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>nix<span class="w"> </span>init
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>nix<span class="w"> </span>input
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Sometimes users will make mistake either because of a typo or simply because of
|
|||
|
|
lack of discoverability. Our handling of this cases needs to be context
|
|||
|
|
sensitive.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>init<span class="w"> </span>--template<span class="o">=</span>template#pyton
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Error!<span class="w"> </span>Template<span class="w"> </span><span class="sb">`</span>template#pyton<span class="sb">`</span><span class="w"> </span>not<span class="w"> </span>found.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
Initializing<span class="w"> </span>Nix<span class="w"> </span>project<span class="w"> </span>at<span class="w"> </span><span class="sb">`</span>/path/to/here<span class="sb">`</span>.
|
|||
|
|
<span class="w"> </span>Select<span class="w"> </span>a<span class="w"> </span>template<span class="w"> </span><span class="k">for</span><span class="w"> </span>you<span class="w"> </span>new<span class="w"> </span>project:
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>template#python
|
|||
|
|
<span class="w"> </span>template#python-pip
|
|||
|
|
<span class="w"> </span>template#python-poetry
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h4 id="next-steps">Next steps</h4>
|
|||
|
|
<p>It can be invaluable to newcomers to show what a possible next steps and what
|
|||
|
|
is the usual development workflow with Lix. For example:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>init<span class="w"> </span>--template<span class="o">=</span>template#python
|
|||
|
|
Initializing<span class="w"> </span>project<span class="w"> </span><span class="sb">`</span>template#python<span class="sb">`</span>
|
|||
|
|
<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="sb">`</span>/home/USER/dev/new-project<span class="sb">`</span>
|
|||
|
|
|
|||
|
|
<span class="w"> </span>Next<span class="w"> </span>steps
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>nix<span class="w"> </span>develop<span class="w"> </span>--<span class="w"> </span>to<span class="w"> </span>enter<span class="w"> </span>development<span class="w"> </span>environment
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>nix<span class="w"> </span>build<span class="w"> </span>--<span class="w"> </span>to<span class="w"> </span>build<span class="w"> </span>your<span class="w"> </span>project
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h4 id="educate-the-user">Educate the user</h4>
|
|||
|
|
<p>We should take any opportunity to <strong>educate users</strong>, but at the same time we
|
|||
|
|
must <strong>be very very careful to not annoy users</strong>. There is a thin line between
|
|||
|
|
being helpful and being annoying.</p>
|
|||
|
|
<p>An example of educating users might be to provide <em>Tips</em> in places where they
|
|||
|
|
are waiting.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>build
|
|||
|
|
<span class="w"> </span>Started<span class="w"> </span>building<span class="w"> </span>my-project<span class="w"> </span><span class="m">1</span>.2.3
|
|||
|
|
<span class="w"> </span>Downloaded<span class="w"> </span>python3.8-poetry<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">5</span>.3<span class="w"> </span>seconds
|
|||
|
|
<span class="w"> </span>Downloaded<span class="w"> </span>python3.8-requests<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">5</span>.3<span class="w"> </span>seconds
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Press<span class="w"> </span><span class="sb">`</span>v<span class="sb">`</span><span class="w"> </span>to<span class="w"> </span>increase<span class="w"> </span>logs<span class="w"> </span>verbosity
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span><span class="sb">`</span>?<span class="sb">`</span><span class="w"> </span>to<span class="w"> </span>see<span class="w"> </span>other<span class="w"> </span>options
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Learn<span class="w"> </span>something<span class="w"> </span>new<span class="w"> </span>with<span class="w"> </span>every<span class="w"> </span>build...
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>See<span class="w"> </span>last<span class="w"> </span>logs<span class="w"> </span>of<span class="w"> </span>a<span class="w"> </span>build<span class="w"> </span>with<span class="w"> </span><span class="sb">`</span>nix<span class="w"> </span>log<span class="w"> </span>--last<span class="sb">`</span><span class="w"> </span>command.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Evaluated<span class="w"> </span>my-project<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">14</span>.43<span class="w"> </span>seconds
|
|||
|
|
Downloading<span class="w"> </span><span class="o">[</span><span class="m">12</span><span class="w"> </span>/<span class="w"> </span><span class="m">200</span><span class="o">]</span>
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>firefox<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="o">[</span><span class="c1">#########> ] 10Mb/s | 2min left</span>
|
|||
|
|
<span class="w"> </span>Building<span class="w"> </span><span class="o">[</span><span class="m">2</span><span class="w"> </span>/<span class="w"> </span><span class="m">20</span><span class="o">]</span>
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>glibc<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span>-><span class="w"> </span>buildPhase:<span class="w"> </span><last<span class="w"> </span>log<span class="w"> </span>line>
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Now <strong>Learn</strong> part of the output is where you educate users. You should only
|
|||
|
|
show it when you know that a build will take some time and not annoy users of
|
|||
|
|
the builds that take only few seconds.</p>
|
|||
|
|
<p>Every feature like this should go through an intensive review and testing to
|
|||
|
|
collect as much feedback as possible and to fine tune every little detail. If
|
|||
|
|
done right this can be an awesome features beginners and advance users will
|
|||
|
|
love, but if not done perfectly it will annoy users and leave bad impression.</p>
|
|||
|
|
<h2 id="input">Input</h2>
|
|||
|
|
<p>Input to a command is provided via <code>ARGUMENTS</code> and <code>OPTIONS</code>.</p>
|
|||
|
|
<p><code>ARGUMENTS</code> represent a required input for a function. When choosing to use
|
|||
|
|
<code>ARGUMENTS</code> over <code>OPTIONS</code> please be aware of the downsides that come with it:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>User will need to remember the order of <code>ARGUMENTS</code>. This is not a problem if
|
|||
|
|
there is only one <code>ARGUMENT</code>.</li>
|
|||
|
|
<li>With <code>OPTIONS</code> it is possible to provide much better auto completion.</li>
|
|||
|
|
<li>With <code>OPTIONS</code> it is possible to provide much better error message.</li>
|
|||
|
|
<li>Using <code>OPTIONS</code> it will mean there is a little bit more typing.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>We don’t discourage the use of <code>ARGUMENTS</code>, but simply want to make every
|
|||
|
|
developer consider the downsides and choose wisely.</p>
|
|||
|
|
<h3 id="naming-the-options">Naming the <code>OPTIONS</code></h3>
|
|||
|
|
<p>The only naming convention - apart from the ones mentioned in Naming the
|
|||
|
|
<code>COMMANDS</code> section is how flags are named.</p>
|
|||
|
|
<p>Flags are a type of <code>OPTION</code> that represent an option that can be turned ON of
|
|||
|
|
OFF. We can say <strong>flags are boolean type of</strong> <code>**OPTION**</code>.</p>
|
|||
|
|
<p>Here are few examples of flag <code>OPTIONS</code>:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><code>--colors</code> vs. <code>--no-colors</code> (showing colors in the output)</li>
|
|||
|
|
<li><code>--emojis</code> vs. <code>--no-emojis</code> (showing emojis in the output)</li>
|
|||
|
|
</ul>
|
|||
|
|
<h3 id="prompt-when-input-not-provided">Prompt when input not provided</h3>
|
|||
|
|
<p>For <em>main commands</em> (as <a href="#classification">per classification</a>) we want command
|
|||
|
|
to improve the discoverability of possible input. A new user will most likely
|
|||
|
|
not know which <code>ARGUMENTS</code> and <code>OPTIONS</code> are required or which values are
|
|||
|
|
possible for those options.</p>
|
|||
|
|
<p>In case the user does not provide the input or they provide wrong input,
|
|||
|
|
rather than show the error, prompt a user with an option to find and select
|
|||
|
|
correct input (see examples).</p>
|
|||
|
|
<p>Prompting is of course not required when TTY is not attached to STDIN. This
|
|||
|
|
would mean that scripts won't need to handle prompt, but rather handle errors.</p>
|
|||
|
|
<p>A place to use prompt and provide user with interactive select</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>init
|
|||
|
|
Initializing<span class="w"> </span>Nix<span class="w"> </span>project<span class="w"> </span>at<span class="w"> </span><span class="sb">`</span>/path/to/here<span class="sb">`</span>.
|
|||
|
|
<span class="w"> </span>Select<span class="w"> </span>a<span class="w"> </span>template<span class="w"> </span><span class="k">for</span><span class="w"> </span>you<span class="w"> </span>new<span class="w"> </span>project:
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>py
|
|||
|
|
<span class="w"> </span>template#python-pip
|
|||
|
|
<span class="w"> </span>template#python-poetry
|
|||
|
|
<span class="w"> </span><span class="o">[</span><span class="w"> </span>Showing<span class="w"> </span><span class="m">2</span><span class="w"> </span>templates<span class="w"> </span>from<span class="w"> </span><span class="m">1345</span><span class="w"> </span>templates<span class="w"> </span><span class="o">]</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Another great place to add prompts are <strong>confirmation dialogues for dangerous
|
|||
|
|
actions</strong>. For example when adding new substitutor via <code>OPTIONS</code> or via
|
|||
|
|
<code>flake.nix</code> we should prompt - for the first time - and let user review what is
|
|||
|
|
going to happen.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>build<span class="w"> </span>--option<span class="w"> </span>substitutors<span class="w"> </span>https://cache.example.org
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Warning!<span class="w"> </span>A<span class="w"> </span>security<span class="w"> </span>related<span class="w"> </span>question<span class="w"> </span>needs<span class="w"> </span>to<span class="w"> </span>be<span class="w"> </span>answered.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>The<span class="w"> </span>following<span class="w"> </span>substitutors<span class="w"> </span>will<span class="w"> </span>be<span class="w"> </span>used<span class="w"> </span>to<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="sb">`</span>my-project<span class="sb">`</span>:
|
|||
|
|
<span class="w"> </span>-<span class="w"> </span>https://cache.example.org
|
|||
|
|
|
|||
|
|
<span class="w"> </span>Do<span class="w"> </span>you<span class="w"> </span>allow<span class="w"> </span><span class="sb">`</span>my-project<span class="sb">`</span><span class="w"> </span>to<span class="w"> </span>use<span class="w"> </span>above<span class="w"> </span>mentioned<span class="w"> </span>substitutors?
|
|||
|
|
<span class="w"> </span><span class="o">[</span>y/N<span class="o">]</span><span class="w"> </span><span class="p">|</span>><span class="w"> </span>y
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h2 id="output">Output</h2>
|
|||
|
|
<p>Terminal output can be quite limiting in many ways. Which should force us to
|
|||
|
|
think about the experience even more. As with every design the output is a
|
|||
|
|
compromise between being terse and being verbose, between showing help to
|
|||
|
|
beginners and annoying advance users. For this it is important that we know
|
|||
|
|
what are the priorities.</p>
|
|||
|
|
<p>Lix command line should be first and foremost written with beginners in mind.
|
|||
|
|
But users won't stay beginners for long and what was once useful might quickly
|
|||
|
|
become annoying. There is no golden rule that we can give in this guideline
|
|||
|
|
that would make it easier how to draw a line and find best compromise.</p>
|
|||
|
|
<p>What we would encourage is to <strong>build prototypes</strong>, do some <strong>user testing</strong>
|
|||
|
|
and collect <strong>feedback</strong>. Then repeat the cycle few times.</p>
|
|||
|
|
<p>First design the <em>happy path</em> and only after your iron it out, continue to work
|
|||
|
|
on <strong>edge cases</strong> (handling and displaying errors, changes of the output by
|
|||
|
|
certain <code>OPTIONS</code>, etc…)</p>
|
|||
|
|
<h3 id="follow-best-practices">Follow best practices</h3>
|
|||
|
|
<p>Needless to say we Lix must be a good citizen and follow best practices in
|
|||
|
|
command line.</p>
|
|||
|
|
<p>In short: <strong>STDOUT is for output, STDERR is for (human) messaging.</strong></p>
|
|||
|
|
<p>STDOUT and STDERR provide a way for you to output messages to the user while
|
|||
|
|
also allowing them to redirect content to a file. For example:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>build<span class="w"> </span>><span class="w"> </span>build.txt
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Error!<span class="w"> </span>Attribute<span class="w"> </span><span class="sb">`</span>bin<span class="sb">`</span><span class="w"> </span>missing<span class="w"> </span>at<span class="w"> </span><span class="o">(</span><span class="m">1</span>:94<span class="o">)</span><span class="w"> </span>from<span class="w"> </span>string.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
<span class="w"> </span><span class="m">1</span><span class="p">|</span><span class="w"> </span>with<span class="w"> </span>import<span class="w"> </span><nixpkgs><span class="w"> </span><span class="o">{</span><span class="w"> </span><span class="o">}</span><span class="p">;</span><span class="w"> </span><span class="o">(</span>pkgs.runCommandCC<span class="w"> </span>or<span class="w"> </span>pkgs.runCommand<span class="o">)</span><span class="w"> </span><span class="s2">"shell"</span><span class="w"> </span><span class="o">{</span><span class="w"> </span><span class="nv">buildInputs</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">[</span><span class="w"> </span><span class="o">(</span>surge.bin<span class="o">)</span><span class="w"> </span><span class="o">]</span><span class="p">;</span><span class="w"> </span><span class="o">}</span><span class="w"> </span><span class="s2">""</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Because this warning is on STDERR, it doesn’t end up in the file.</p>
|
|||
|
|
<p>But not everything on STDERR is an error though. For example, you can run <code>nix
|
|||
|
|
build</code> and collect logs in a file while still seeing the progress.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$ nix build > build.txt
|
|||
|
|
Evaluated 1234 files in 1.2 seconds
|
|||
|
|
Downloaded python3.8-poetry 1.2.3 in 5.3 seconds
|
|||
|
|
Downloaded python3.8-requests 1.2.3 in 5.3 seconds
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
Press `v` to increase logs verbosity
|
|||
|
|
|> `?` to see other options
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
Learn something new with every build...
|
|||
|
|
|> See last logs of a build with `nix log --last` command.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
Evaluated my-project 1.2.3 in 14.43 seconds
|
|||
|
|
Downloading [12 / 200]
|
|||
|
|
|> firefox 1.2.3 [#########> ] 10Mb/s | 2min left
|
|||
|
|
Building [2 / 20]
|
|||
|
|
|> glibc 1.2.3 -> buildPhase: <last log line>
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h3 id="errors-wip">Errors (WIP)</h3>
|
|||
|
|
<p><strong>TODO</strong>: Once we have implementation for the <em>happy path</em> then we will think
|
|||
|
|
how to present errors.</p>
|
|||
|
|
<h3 id="not-only-for-humans">Not only for humans</h3>
|
|||
|
|
<p>Terse, machine-readable output formats can also be useful but shouldn’t get in
|
|||
|
|
the way of making beautiful CLI output. When needed, commands should offer a
|
|||
|
|
<code>--json</code> flag to allow users to easily parse and script the CLI.</p>
|
|||
|
|
<p>When TTY is not detected on STDOUT we should remove all design elements (no
|
|||
|
|
colors, no emojis and using ASCII instead of Unicode symbols). The same should
|
|||
|
|
happen when TTY is not detected on STDERR. We should not display progress /
|
|||
|
|
status section, but only print warnings and errors.</p>
|
|||
|
|
<h3 id="returning-future-proof-json">Returning future proof JSON</h3>
|
|||
|
|
<p>The schema of JSON output should allow for backwards compatible extension. This section explains how to achieve this.</p>
|
|||
|
|
<p>Two definitions are helpful here, because while JSON only defines one "key-value"
|
|||
|
|
object type, we use it to cover two use cases:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><strong>dictionary</strong>: a map from names to value that all have the same type. In
|
|||
|
|
C++ this would be a <code>std::map</code> with string keys.</li>
|
|||
|
|
<li><strong>record</strong>: a fixed set of attributes each with their own type. In C++, this
|
|||
|
|
would be represented by a <code>struct</code>.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>It is best not to mix these use cases, as that may lead to incompatibilities when the schema changes. For example, adding a record field to a dictionary breaks consumers that assume all JSON object fields to have the same meaning and type.</p>
|
|||
|
|
<p>This leads to the following guidelines:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>The top-level (root) value must be a record.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>Otherwise, one can not change the structure of a command's output.</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>The value of a dictionary item must be a record.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>Otherwise, the item type can not be extended.</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>List items should be records.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>Otherwise, one can not change the structure of the list items.</p>
|
|||
|
|
<p>If the order of the items does not matter, and each item has a unique key that is a string, consider representing the list as a dictionary instead. If the order of the items needs to be preserved, return a list of records.</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>Streaming JSON should return records.</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>An example of a streaming JSON format is <a href="https://jsonlines.org/">JSON lines</a>, where each line represents a JSON value. These JSON values can be considered top-level values or list items, and they must be records.</p>
|
|||
|
|
<h4 id="examples">Examples</h4>
|
|||
|
|
<p>This is bad, because all keys must be assumed to be store implementations:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code><span class="p">{</span>
|
|||
|
|
<span class="w"> </span><span class="nt">"local"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="err">...</span><span class="w"> </span><span class="p">},</span>
|
|||
|
|
<span class="w"> </span><span class="nt">"remote"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="err">...</span><span class="w"> </span><span class="p">},</span>
|
|||
|
|
<span class="w"> </span><span class="nt">"http"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="err">...</span><span class="w"> </span><span class="p">}</span>
|
|||
|
|
<span class="p">}</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>This is good, because the it is extensible at the root, and is somewhat self-documenting:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code><span class="p">{</span>
|
|||
|
|
<span class="w"> </span><span class="nt">"storeTypes"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="nt">"local"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="err">...</span><span class="w"> </span><span class="p">},</span><span class="w"> </span><span class="err">...</span><span class="w"> </span><span class="p">},</span>
|
|||
|
|
<span class="w"> </span><span class="nt">"pluginSupport"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span>
|
|||
|
|
<span class="p">}</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>While the dictionary of store types seems like a very complete response at first, a use case may arise that warrants returning additional information.
|
|||
|
|
For example, the presence of plugin support may be crucial information for a client to proceed when their desired store type is missing.</p>
|
|||
|
|
<p>The following representation is bad because it is not extensible:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code><span class="p">{</span><span class="w"> </span><span class="nt">"outputs"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="s2">"out"</span><span class="w"> </span><span class="s2">"bin"</span><span class="w"> </span><span class="p">]</span><span class="w"> </span><span class="p">}</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>However, simply converting everything to records is not enough, because the order of outputs must be preserved:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code><span class="p">{</span><span class="w"> </span><span class="nt">"outputs"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="nt">"bin"</span><span class="p">:</span><span class="w"> </span><span class="p">{},</span><span class="w"> </span><span class="nt">"out"</span><span class="p">:</span><span class="w"> </span><span class="p">{}</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="p">}</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>The first item is the default output. Deriving this information from the outputs ordering is not great, but this is how Lix currently happens to work.
|
|||
|
|
While it is possible for a JSON parser to preserve the order of fields, we can not rely on this capability to be present in all JSON libraries.</p>
|
|||
|
|
<p>This representation is extensible and preserves the ordering:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code><span class="p">{</span><span class="w"> </span><span class="nt">"outputs"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="nt">"outputName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"out"</span><span class="w"> </span><span class="p">},</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="nt">"outputName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"bin"</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="p">]</span><span class="w"> </span><span class="p">}</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h3 id="dialog-with-the-user">Dialog with the user</h3>
|
|||
|
|
<p>CLIs don't always make it clear when an action has taken place. For every
|
|||
|
|
action a user performs, your CLI should provide an equal and appropriate
|
|||
|
|
reaction, clearly highlighting the what just happened. For example:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>build
|
|||
|
|
<span class="w"> </span>Downloaded<span class="w"> </span>python3.8-poetry<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">5</span>.3<span class="w"> </span>seconds
|
|||
|
|
<span class="w"> </span>Downloaded<span class="w"> </span>python3.8-requests<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">5</span>.3<span class="w"> </span>seconds
|
|||
|
|
...
|
|||
|
|
<span class="w"> </span>Success!<span class="w"> </span>You<span class="w"> </span>have<span class="w"> </span>successfully<span class="w"> </span>built<span class="w"> </span>my-project.
|
|||
|
|
$
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Above command clearly states that command successfully completed. And in case
|
|||
|
|
of <code>nix build</code>, which is a command that might take some time to complete, it is
|
|||
|
|
equally important to also show that a command started.</p>
|
|||
|
|
<h3 id="text-alignment">Text alignment</h3>
|
|||
|
|
<p>Text alignment is the number one design element that will present all of the
|
|||
|
|
Nix commands as a family and not as separate tools glued together.</p>
|
|||
|
|
<p>The format we should follow is:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>COMMAND
|
|||
|
|
<span class="w"> </span>VERB_1<span class="w"> </span>NOUN<span class="w"> </span>and<span class="w"> </span>other<span class="w"> </span>words
|
|||
|
|
<span class="w"> </span>VERB__1<span class="w"> </span>NOUN<span class="w"> </span>and<span class="w"> </span>other<span class="w"> </span>words
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>Some<span class="w"> </span>details
|
|||
|
|
</code></pre></div>
|
|||
|
|
<p>Few rules that we can extract from above example:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>Each line should start at least with one space.</li>
|
|||
|
|
<li>First word should be a VERB and must be aligned to the right.</li>
|
|||
|
|
<li>Second word should be a NOUN and must be aligned to the left.</li>
|
|||
|
|
<li>If you can not find a good VERB / NOUN pair, don’t worry make it as
|
|||
|
|
understandable to the user as possible.</li>
|
|||
|
|
<li>More details of each line can be provided by <code>|></code> character which is serving
|
|||
|
|
as the first word when aligning the text</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>Don’t forget you should also test your terminal output with colors and emojis
|
|||
|
|
off (<code>--no-colors --no-emojis</code>).</p>
|
|||
|
|
<h3 id="dim-bright">Dim / Bright</h3>
|
|||
|
|
<p>After comparing few terminals with different color schemes we would <strong>recommend
|
|||
|
|
to avoid using dimmed text</strong>. The difference from the rest of the text is very
|
|||
|
|
little in many terminal and color scheme combinations. Sometimes the difference
|
|||
|
|
is not even notable, therefore relying on it wouldn’t make much sense.</p>
|
|||
|
|
<p><strong>The bright text is much better supported</strong> across terminals and color
|
|||
|
|
schemes. Most of the time the difference is perceived as if the bright text
|
|||
|
|
would be bold.</p>
|
|||
|
|
<h3 id="colors">Colors</h3>
|
|||
|
|
<p>Humans are already conditioned by society to attach certain meaning to certain
|
|||
|
|
colors. While the meaning is not universal, a simple collection of colors is
|
|||
|
|
used to represent basic emotions.</p>
|
|||
|
|
<p>Colors that can be used in output</p>
|
|||
|
|
<ul>
|
|||
|
|
<li>Red = error, danger, stop</li>
|
|||
|
|
<li>Green = success, good</li>
|
|||
|
|
<li>Yellow/Orange = proceed with caution, warning, in progress</li>
|
|||
|
|
<li>Blue/Magenta = stability, calm</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>While colors are nice, when command line is used by machines (in automation
|
|||
|
|
scripts) you want to remove the colors. There should be a global <code>--no-colors</code>
|
|||
|
|
option that would remove the colors.</p>
|
|||
|
|
<h3 id="special-unicode-characters">Special (Unicode) characters</h3>
|
|||
|
|
<p>Most of the terminal have good support for Unicode characters and you should
|
|||
|
|
use them in your output by default. But always have a backup solution that is
|
|||
|
|
implemented only with ASCII characters and will be used when <code>--ascii</code> option
|
|||
|
|
is going to be passed in. Please make sure that you test your output also
|
|||
|
|
without Unicode characters</p>
|
|||
|
|
<p>More they showing all the different Unicode characters it is important to
|
|||
|
|
<strong>establish common set of characters</strong> that we use for certain situations.</p>
|
|||
|
|
<h3 id="emojis">Emojis</h3>
|
|||
|
|
<p>Emojis help channel emotions even better than text, colors and special
|
|||
|
|
characters.</p>
|
|||
|
|
<p>We recommend <strong>keeping the set of emojis to a minimum</strong>. This will enable each
|
|||
|
|
emoji to stand out more.</p>
|
|||
|
|
<p>As not everybody is happy about emojis we should provide an <code>--no-emojis</code>
|
|||
|
|
option to disable them. Please make sure that you test your output also without
|
|||
|
|
emojis.</p>
|
|||
|
|
<h3 id="tables">Tables</h3>
|
|||
|
|
<p>All commands that are listing certain data can be implemented in some sort of a
|
|||
|
|
table. It’s important that each row of your output is a single ‘entry’ of data.
|
|||
|
|
Never output table borders. It’s noisy and a huge pain for parsing using other
|
|||
|
|
tools such as <code>grep</code>.</p>
|
|||
|
|
<p>Be mindful of the screen width. Only show a few columns by default with the
|
|||
|
|
table header, for more the table can be manipulated by the following options:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><code>--no-headers</code>: Show column headers by default but allow to hide them.</li>
|
|||
|
|
<li><code>--columns</code>: Comma-separated list of column names to add.</li>
|
|||
|
|
<li><code>--sort</code>: Allow sorting by column. Allow inverse and multi-column sort as well.</li>
|
|||
|
|
</ul>
|
|||
|
|
<h3 id="interactive-output">Interactive output</h3>
|
|||
|
|
<p>Interactive output was selected to be able to strike the balance between
|
|||
|
|
beginners and advance users. While the default output will target beginners it
|
|||
|
|
can, with a few key strokes, be changed into and advance introspection tool.</p>
|
|||
|
|
<h4 id="progress">Progress</h4>
|
|||
|
|
<p>For longer running commands we should provide and overview the progress.
|
|||
|
|
This is shown best in <code>nix build</code> example:</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>build
|
|||
|
|
<span class="w"> </span>Started<span class="w"> </span>building<span class="w"> </span>my-project<span class="w"> </span><span class="m">1</span>.2.3
|
|||
|
|
<span class="w"> </span>Downloaded<span class="w"> </span>python3.8-poetry<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">5</span>.3<span class="w"> </span>seconds
|
|||
|
|
<span class="w"> </span>Downloaded<span class="w"> </span>python3.8-requests<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">5</span>.3<span class="w"> </span>seconds
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Press<span class="w"> </span><span class="sb">`</span>v<span class="sb">`</span><span class="w"> </span>to<span class="w"> </span>increase<span class="w"> </span>logs<span class="w"> </span>verbosity
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span><span class="sb">`</span>?<span class="sb">`</span><span class="w"> </span>to<span class="w"> </span>see<span class="w"> </span>other<span class="w"> </span>options
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Learn<span class="w"> </span>something<span class="w"> </span>new<span class="w"> </span>with<span class="w"> </span>every<span class="w"> </span>build...
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>See<span class="w"> </span>last<span class="w"> </span>logs<span class="w"> </span>of<span class="w"> </span>a<span class="w"> </span>build<span class="w"> </span>with<span class="w"> </span><span class="sb">`</span>nix<span class="w"> </span>log<span class="w"> </span>--last<span class="sb">`</span><span class="w"> </span>command.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Evaluated<span class="w"> </span>my-project<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="m">14</span>.43<span class="w"> </span>seconds
|
|||
|
|
Downloading<span class="w"> </span><span class="o">[</span><span class="m">12</span><span class="w"> </span>/<span class="w"> </span><span class="m">200</span><span class="o">]</span>
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>firefox<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span><span class="o">[</span><span class="c1">#########> ] 10Mb/s | 2min left</span>
|
|||
|
|
<span class="w"> </span>Building<span class="w"> </span><span class="o">[</span><span class="m">2</span><span class="w"> </span>/<span class="w"> </span><span class="m">20</span><span class="o">]</span>
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>glibc<span class="w"> </span><span class="m">1</span>.2.3<span class="w"> </span>-><span class="w"> </span>buildPhase:<span class="w"> </span><last<span class="w"> </span>log<span class="w"> </span>line>
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h4 id="search">Search</h4>
|
|||
|
|
<p>Use a <code>fzf</code> like fuzzy search when there are multiple options to choose from.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>init
|
|||
|
|
Initializing<span class="w"> </span>Nix<span class="w"> </span>project<span class="w"> </span>at<span class="w"> </span><span class="sb">`</span>/path/to/here<span class="sb">`</span>.
|
|||
|
|
<span class="w"> </span>Select<span class="w"> </span>a<span class="w"> </span>template<span class="w"> </span><span class="k">for</span><span class="w"> </span>you<span class="w"> </span>new<span class="w"> </span>project:
|
|||
|
|
<span class="w"> </span><span class="p">|</span>><span class="w"> </span>py
|
|||
|
|
<span class="w"> </span>template#python-pip
|
|||
|
|
<span class="w"> </span>template#python-poetry
|
|||
|
|
<span class="w"> </span><span class="o">[</span><span class="w"> </span>Showing<span class="w"> </span><span class="m">2</span><span class="w"> </span>templates<span class="w"> </span>from<span class="w"> </span><span class="m">1345</span><span class="w"> </span>templates<span class="w"> </span><span class="o">]</span>
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h4 id="prompt">Prompt</h4>
|
|||
|
|
<p>In some situations we need to prompt the user and inform the user about what is
|
|||
|
|
going to happen.</p>
|
|||
|
|
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>nix<span class="w"> </span>build<span class="w"> </span>--option<span class="w"> </span>substitutors<span class="w"> </span>https://cache.example.org
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>Warning!<span class="w"> </span>A<span class="w"> </span>security<span class="w"> </span>related<span class="w"> </span>question<span class="w"> </span>needs<span class="w"> </span>to<span class="w"> </span>be<span class="w"> </span>answered.
|
|||
|
|
------------------------------------------------------------------------
|
|||
|
|
<span class="w"> </span>The<span class="w"> </span>following<span class="w"> </span>substitutors<span class="w"> </span>will<span class="w"> </span>be<span class="w"> </span>used<span class="w"> </span>to<span class="w"> </span><span class="k">in</span><span class="w"> </span><span class="sb">`</span>my-project<span class="sb">`</span>:
|
|||
|
|
<span class="w"> </span>-<span class="w"> </span>https://cache.example.org
|
|||
|
|
|
|||
|
|
<span class="w"> </span>Do<span class="w"> </span>you<span class="w"> </span>allow<span class="w"> </span><span class="sb">`</span>my-project<span class="sb">`</span><span class="w"> </span>to<span class="w"> </span>use<span class="w"> </span>above<span class="w"> </span>mentioned<span class="w"> </span>substitutors?
|
|||
|
|
<span class="w"> </span><span class="o">[</span>y/N<span class="o">]</span><span class="w"> </span><span class="p">|</span>><span class="w"> </span>y
|
|||
|
|
</code></pre></div>
|
|||
|
|
<h3 id="verbosity">Verbosity</h3>
|
|||
|
|
<p>There are many ways that you can control verbosity.</p>
|
|||
|
|
<p>Verbosity levels are:</p>
|
|||
|
|
<ul>
|
|||
|
|
<li><code>ERROR</code> (level 0)</li>
|
|||
|
|
<li><code>WARN</code> (level 1)</li>
|
|||
|
|
<li><code>NOTICE</code> (level 2)</li>
|
|||
|
|
<li><code>INFO</code> (level 3)</li>
|
|||
|
|
<li><code>TALKATIVE</code> (level 4)</li>
|
|||
|
|
<li><code>CHATTY</code> (level 5)</li>
|
|||
|
|
<li><code>DEBUG</code> (level 6)</li>
|
|||
|
|
<li><code>VOMIT</code> (level 7)</li>
|
|||
|
|
</ul>
|
|||
|
|
<p>The default level that the command starts is <code>ERROR</code>. The simplest way to
|
|||
|
|
increase the verbosity by stacking <code>-v</code> option (eg: <code>-vvv == level 3 == INFO</code>).
|
|||
|
|
There are also two shortcuts, <code>--debug</code> to run in <code>DEBUG</code> verbosity level and
|
|||
|
|
<code>--quiet</code> to run in <code>ERROR</code> verbosity level.</p>
|
|||
|
|
<hr />
|
|||
|
|
<h2 id="appendix-1-commands-naming-exceptions">Appendix 1: Commands naming exceptions</h2>
|
|||
|
|
<p><code>nix init</code> and <code>nix repl</code> are well established</p>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
</article>
|
|||
|
|
</div>
|
|||
|
|
|
|||
|
|
|
|||
|
|
<script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
|
|||
|
|
</div>
|
|||
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|
|||
|
|
</main>
|
|||
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|
|
|||
|
|
<footer class="md-footer">
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|||
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|
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<div class="md-footer-meta md-typeset">
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<div class="md-footer-meta__inner md-grid">
|
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|
|
<div class="md-copyright">
|
|||
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|
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|
|
<div class="md-copyright__highlight">
|
|||
|
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Licenced MIT
|
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|
|
</div>
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|
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|
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Made with
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<a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener">
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Material for MkDocs
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</a>
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