suyiiyii/yq
1
0
Fork 0
mirror of https://github.com/mikefarah/yq.git synced 2024-12-19 20:19:04 +00:00
Code Issues Packages Projects Releases Wiki Activity
8072e66d46
yq/docs/read/index.html

622 lines
16 KiB
HTML
Raw Blame History

<!DOCTYPE html>
<html lang="en" class="no-js">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="lang:clipboard.copy" content="Copy to clipboard">
<meta name="lang:clipboard.copied" content="Copied to clipboard">
<meta name="lang:search.language" content="en">
<meta name="lang:search.result.none" content="No matching documents">
<meta name="lang:search.result.one" content="1 matching document">
<meta name="lang:search.result.other" content="# matching documents">
<meta name="lang:search.tokenizer" content="[\s\-]+">
<link rel="shortcut icon" href="../assets/images/favicon.png">
<meta name="generator" content="mkdocs-0.17.2, mkdocs-material-2.2.5">
<title>Read - Yq</title>
<link rel="stylesheet" href="../assets/stylesheets/application.bcabdff3.css">
<script src="../assets/javascripts/modernizr.1aa3b519.js"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,400i,700|Roboto+Mono">
<style>body,input{font-family:"Roboto","Helvetica Neue",Helvetica,Arial,sans-serif}code,kbd,pre{font-family:"Roboto Mono","Courier New",Courier,monospace}</style>
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
</head>
<body>
<svg class="md-svg">
<defs>
<svg xmlns="http://www.w3.org/2000/svg" width="416" height="448" viewBox="0 0 416 448" id="github"><path fill="currentColor" d="M160 304q0 10-3.125 20.5t-10.75 19T128 352t-18.125-8.5-10.75-19T96 304t3.125-20.5 10.75-19T128 256t18.125 8.5 10.75 19T160 304zm160 0q0 10-3.125 20.5t-10.75 19T288 352t-18.125-8.5-10.75-19T256 304t3.125-20.5 10.75-19T288 256t18.125 8.5 10.75 19T320 304zm40 0q0-30-17.25-51T296 232q-10.25 0-48.75 5.25Q229.5 240 208 240t-39.25-2.75Q130.75 232 120 232q-29.5 0-46.75 21T56 304q0 22 8 38.375t20.25 25.75 30.5 15 35 7.375 37.25 1.75h42q20.5 0 37.25-1.75t35-7.375 30.5-15 20.25-25.75T360 304zm56-44q0 51.75-15.25 82.75-9.5 19.25-26.375 33.25t-35.25 21.5-42.5 11.875-42.875 5.5T212 416q-19.5 0-35.5-.75t-36.875-3.125-38.125-7.5-34.25-12.875T37 371.5t-21.5-28.75Q0 312 0 260q0-59.25 34-99-6.75-20.5-6.75-42.5 0-29 12.75-54.5 27 0 47.5 9.875t47.25 30.875Q171.5 96 212 96q37 0 70 8 26.25-20.5 46.75-30.25T376 64q12.75 25.5 12.75 54.5 0 21.75-6.75 42 34 40 34 99.5z"/></svg>
</defs>
</svg>
<input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="drawer">
<input class="md-toggle" data-md-toggle="search" type="checkbox" id="search">
<label class="md-overlay" data-md-component="overlay" for="drawer"></label>
<header class="md-header" data-md-component="header">
<nav class="md-header-nav md-grid">
<div class="md-flex">
<div class="md-flex__cell md-flex__cell--shrink">
<a href=".." title="Yq" class="md-header-nav__button md-logo">
<i class="md-icon"></i>
</a>
</div>
<div class="md-flex__cell md-flex__cell--shrink">
<label class="md-icon md-icon--menu md-header-nav__button" for="drawer"></label>
</div>
<div class="md-flex__cell md-flex__cell--stretch">
<div class="md-flex__ellipsis md-header-nav__title" data-md-component="title">
<span class="md-header-nav__topic">
Yq
</span>
<span class="md-header-nav__topic">
Read
</span>
</div>
</div>
<div class="md-flex__cell md-flex__cell--shrink">
<label class="md-icon md-icon--search md-header-nav__button" for="search"></label>
<div class="md-search" data-md-component="search" role="dialog">
<label class="md-search__overlay" for="search"></label>
<div class="md-search__inner">
<form class="md-search__form" name="search">
<input type="text" class="md-search__input" name="query" required placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="query">
<label class="md-icon md-search__icon" for="search"></label>
<button type="reset" class="md-icon md-search__icon" data-md-component="reset">&#xE5CD;</button>
</form>
<div class="md-search__output">
<div class="md-search__scrollwrap" data-md-scrollfix>
<div class="md-search-result" data-md-component="result">
<div class="md-search-result__meta">
Type to start searching
</div>
<ol class="md-search-result__list"></ol>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="md-flex__cell md-flex__cell--shrink">
<div class="md-header-nav__source">
<a href="https://github.com/mikefarah/yq/" title="Go to repository" class="md-source" data-md-source="github">
<div class="md-source__icon">
<svg viewBox="0 0 24 24" width="24" height="24">
<use xlink:href="#github" width="24" height="24"></use>
</svg>
</div>
<div class="md-source__repository">
mikefarah/yq
</div>
</a>
</div>
</div>
</div>
</nav>
</header>
<div class="md-container">
<main class="md-main">
<div class="md-main__inner md-grid" data-md-component="container">
<div class="md-sidebar md-sidebar--primary" data-md-component="navigation">
<div class="md-sidebar__scrollwrap">
<div class="md-sidebar__inner">
<nav class="md-nav md-nav--primary" data-md-level="0">
<label class="md-nav__title md-nav__title--site" for="drawer">
<span class="md-nav__button md-logo">
<i class="md-icon"></i>
</span>
Yq
</label>
<div class="md-nav__source">
<a href="https://github.com/mikefarah/yq/" title="Go to repository" class="md-source" data-md-source="github">
<div class="md-source__icon">
<svg viewBox="0 0 24 24" width="24" height="24">
<use xlink:href="#github" width="24" height="24"></use>
</svg>
</div>
<div class="md-source__repository">
mikefarah/yq
</div>
</a>
</div>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href=".." title="Install" class="md-nav__link">
Install
</a>
</li>
<li class="md-nav__item md-nav__item--active">
<input class="md-toggle md-nav__toggle" data-md-toggle="toc" type="checkbox" id="toc">
<label class="md-nav__link md-nav__link--active" for="toc">
Read
</label>
<a href="./" title="Read" class="md-nav__link md-nav__link--active">
Read
</a>
<nav class="md-nav md-nav--secondary">
<label class="md-nav__title" for="toc">Table of contents</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="#basic" title="Basic" class="md-nav__link">
Basic
</a>
</li>
<li class="md-nav__item">
<a href="#from-stdin" title="From Stdin" class="md-nav__link">
From Stdin
</a>
</li>
<li class="md-nav__item">
<a href="#splat" title="Splat" class="md-nav__link">
Splat
</a>
</li>
<li class="md-nav__item">
<a href="#handling-in-the-yaml-key" title="Handling '.' in the yaml key" class="md-nav__link">
Handling '.' in the yaml key
</a>
</li>
<li class="md-nav__item">
<a href="#arrays" title="Arrays" class="md-nav__link">
Arrays
</a>
</li>
<li class="md-nav__item">
<a href="#array-splat" title="Array Splat" class="md-nav__link">
Array Splat
</a>
</li>
<li class="md-nav__item">
<a href="#keys-with-dots" title="Keys with dots" class="md-nav__link">
Keys with dots
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="../write/" title="Write/Update" class="md-nav__link">
Write/Update
</a>
</li>
<li class="md-nav__item">
<a href="../create/" title="Create" class="md-nav__link">
Create
</a>
</li>
<li class="md-nav__item">
<a href="../convert/" title="Convert" class="md-nav__link">
Convert
</a>
</li>
<li class="md-nav__item">
<a href="../merge/" title="Merge" class="md-nav__link">
Merge
</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-sidebar md-sidebar--secondary" data-md-component="toc">
<div class="md-sidebar__scrollwrap">
<div class="md-sidebar__inner">
<nav class="md-nav md-nav--secondary">
<label class="md-nav__title" for="toc">Table of contents</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="#basic" title="Basic" class="md-nav__link">
Basic
</a>
</li>
<li class="md-nav__item">
<a href="#from-stdin" title="From Stdin" class="md-nav__link">
From Stdin
</a>
</li>
<li class="md-nav__item">
<a href="#splat" title="Splat" class="md-nav__link">
Splat
</a>
</li>
<li class="md-nav__item">
<a href="#handling-in-the-yaml-key" title="Handling '.' in the yaml key" class="md-nav__link">
Handling '.' in the yaml key
</a>
</li>
<li class="md-nav__item">
<a href="#arrays" title="Arrays" class="md-nav__link">
Arrays
</a>
</li>
<li class="md-nav__item">
<a href="#array-splat" title="Array Splat" class="md-nav__link">
Array Splat
</a>
</li>
<li class="md-nav__item">
<a href="#keys-with-dots" title="Keys with dots" class="md-nav__link">
Keys with dots
</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-content">
<article class="md-content__inner md-typeset">
<a href="https://github.com/mikefarah/yq/edit/master/docs/read.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
<h1>Read</h1>
<pre><code>yq r &lt;yaml_file|json_file&gt; &lt;path&gt;
</code></pre>
<p>This command can take a json file as input too, and will output yaml unless specified to export as json (-j)</p>
<h3 id="basic">Basic<a class="headerlink" href="#basic" title="Permanent link">&para;</a></h3>
<p>Given a sample.yaml file of:</p>
<pre><code class="yaml">b:
c: 2
</code></pre>
<p>then</p>
<pre><code class="bash">yq r sample.yaml b.c
</code></pre>
<p>will output the value of '2'.</p>
<h3 id="from-stdin">From Stdin<a class="headerlink" href="#from-stdin" title="Permanent link">&para;</a></h3>
<p>Given a sample.yaml file of:</p>
<pre><code class="bash">cat sample.yaml | yq r - b.c
</code></pre>
<p>will output the value of '2'.</p>
<h3 id="splat">Splat<a class="headerlink" href="#splat" title="Permanent link">&para;</a></h3>
<p>Given a sample.yaml file of:</p>
<pre><code class="yaml">---
bob:
item1:
cats: bananas
item2:
cats: apples
</code></pre>
<p>then</p>
<pre><code class="bash">yq r sample.yaml bob.*.cats
</code></pre>
<p>will output</p>
<pre><code class="yaml">- bananas
- apples
</code></pre>
<h3 id="handling-in-the-yaml-key">Handling '.' in the yaml key<a class="headerlink" href="#handling-in-the-yaml-key" title="Permanent link">&para;</a></h3>
<p>Given a sample.yaml file of:</p>
<pre><code class="yaml">b.x:
c: 2
</code></pre>
<p>then</p>
<pre><code class="bash">yq r sample.yaml \&quot;b.x\&quot;.c
</code></pre>
<p>will output the value of '2'.</p>
<h3 id="arrays">Arrays<a class="headerlink" href="#arrays" title="Permanent link">&para;</a></h3>
<p>You can give an index to access a specific element:
e.g.: given a sample file of</p>
<pre><code class="yaml">b:
e:
- name: fred
value: 3
- name: sam
value: 4
</code></pre>
<p>then</p>
<pre><code>yq r sample.yaml 'b.e[1].name'
</code></pre>
<p>will output 'sam'</p>
<p>Note that the path is in quotes to avoid the square brackets being interpreted by your shell.</p>
<h3 id="array-splat">Array Splat<a class="headerlink" href="#array-splat" title="Permanent link">&para;</a></h3>
<p>e.g.: given a sample file of</p>
<pre><code class="yaml">b:
e:
- name: fred
value: 3
- name: sam
value: 4
</code></pre>
<p>then</p>
<pre><code>yq r sample.yaml 'b.e[*].name'
</code></pre>
<p>will output:</p>
<pre><code>- fred
- sam
</code></pre>
<p>Note that the path is in quotes to avoid the square brackets being interpreted by your shell.</p>
<h3 id="keys-with-dots">Keys with dots<a class="headerlink" href="#keys-with-dots" title="Permanent link">&para;</a></h3>
<p>When specifying a key that has a dot use key lookup indicator.</p>
<pre><code class="yaml">b:
foo.bar: 7
</code></pre>
<pre><code class="bash">yaml r sample.yaml 'b[foo.bar]'
</code></pre>
<pre><code class="bash">yaml w sample.yaml 'b[foo.bar]' 9
</code></pre>
<p>Any valid yaml key can be specified as part of a key lookup.</p>
<p>Note that the path is in quotes to avoid the square brackets being interpreted by your shell.</p>
</article>
</div>
</div>
</main>
<footer class="md-footer">
<div class="md-footer-nav">
<nav class="md-footer-nav__inner md-grid">
<a href=".." title="Install" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel="prev">
<div class="md-flex__cell md-flex__cell--shrink">
<i class="md-icon md-icon--arrow-back md-footer-nav__button"></i>
</div>
<div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title">
<span class="md-flex__ellipsis">
<span class="md-footer-nav__direction">
Previous
</span>
Install
</span>
</div>
</a>
<a href="../write/" title="Write/Update" class="md-flex md-footer-nav__link md-footer-nav__link--next" rel="next">
<div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title">
<span class="md-flex__ellipsis">
<span class="md-footer-nav__direction">
Next
</span>
Write/Update
</span>
</div>
<div class="md-flex__cell md-flex__cell--shrink">
<i class="md-icon md-icon--arrow-forward md-footer-nav__button"></i>
</div>
</a>
</nav>
</div>
<div class="md-footer-meta md-typeset">
<div class="md-footer-meta__inner md-grid">
<div class="md-footer-copyright">
powered by
<a href="http://www.mkdocs.org">MkDocs</a>
and
<a href="https://squidfunk.github.io/mkdocs-material/">
Material for MkDocs</a>
</div>
<div class="md-footer-social">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<a href="https://github.com/mikefarah" class="md-footer-social__link fa fa-github"></a>
<a href="https://www.linkedin.com/in/mike-farah-b5a75b2/" class="md-footer-social__link fa fa-linkedin"></a>
</div>
</div>
</div>
</footer>
</div>
<script src="../assets/javascripts/application.6cdc17f0.js"></script>
<script>app.initialize({version:"0.17.2",url:{base:".."}})</script>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink