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Skip to content
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< div class = "md-flex__cell md-flex__cell--stretch" >
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< span class = "md-header-nav__topic" >
Yq
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< span class = "md-header-nav__topic" >
Read
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< div class = "md-flex__cell md-flex__cell--shrink" >
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
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Type to start searching
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mikefarah/yq
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< i class = "md-icon" > < / i >
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< / a >
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Yq
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< / label >
< div class = "md-nav__source" >
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< div class = "md-source__repository" >
mikefarah/yq
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< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = ".." title = "Install" class = "md-nav__link" >
Install
< / a >
< / li >
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Read
< / label >
< a href = "./" title = "Read" class = "md-nav__link md-nav__link--active" >
Read
< / a >
< nav class = "md-nav md-nav--secondary" >
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< label class = "md-nav__title" for = "__toc" > Table of contents< / label >
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< 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 >
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< / li >
< li class = "md-nav__item" >
< a href = "#prefix-splat" title = "Prefix Splat" class = "md-nav__link" >
Prefix Splat
< / a >
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< / li >
< li class = "md-nav__item" >
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< a href = "#multiple-documents-specify-a-single-document" title = "Multiple Documents - specify a single document" class = "md-nav__link" >
Multiple Documents - specify a single document
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#multiple-documents-read-all-documents" title = "Multiple Documents - read all documents" class = "md-nav__link" >
Multiple Documents - read all documents
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< / a >
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< / 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 >
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< li class = "md-nav__item" >
< a href = "#keys-with-dots" title = "Keys with dots" class = "md-nav__link" >
Keys with dots
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "#keys-and-values-with-leading-dashes" title = "Keys (and values) with leading dashes" class = "md-nav__link" >
Keys (and values) with leading dashes
< / a >
< / li >
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< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../write/" title = "Write/Update" class = "md-nav__link" >
Write/Update
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../prefix/" title = "Prefix" class = "md-nav__link" >
Prefix
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../delete/" title = "Delete" class = "md-nav__link" >
Delete
< / a >
< / li >
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< 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 >
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< li class = "md-nav__item" >
< a href = "../merge/" title = "Merge" class = "md-nav__link" >
Merge
< / a >
< / li >
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< / 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" >
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< label class = "md-nav__title" for = "__toc" > Table of contents< / label >
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< 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 >
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< / li >
< li class = "md-nav__item" >
< a href = "#prefix-splat" title = "Prefix Splat" class = "md-nav__link" >
Prefix Splat
< / a >
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< / li >
< li class = "md-nav__item" >
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< a href = "#multiple-documents-specify-a-single-document" title = "Multiple Documents - specify a single document" class = "md-nav__link" >
Multiple Documents - specify a single document
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#multiple-documents-read-all-documents" title = "Multiple Documents - read all documents" class = "md-nav__link" >
Multiple Documents - read all documents
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< / a >
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< / 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 >
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< li class = "md-nav__item" >
< a href = "#keys-with-dots" title = "Keys with dots" class = "md-nav__link" >
Keys with dots
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "#keys-and-values-with-leading-dashes" title = "Keys (and values) with leading dashes" class = "md-nav__link" >
Keys (and values) with leading dashes
< / a >
< / li >
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< / ul >
< / nav >
< / div >
< / div >
< / div >
< div class = "md-content" >
< article class = "md-content__inner md-typeset" >
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< a href = "https://github.com/mikefarah/yq/edit/master/docs/read.md" title = "Edit this page" class = "md-icon md-content__icon" >  < / a >
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< h1 > Read< / h1 >
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< pre > < code > yq r < yaml_file|json_file> < path>
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< / code > < / pre >
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< p > This command can take a json file as input too, and will output yaml unless specified to export as json (-j)< / p >
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< h3 id = "basic" > Basic< a class = "headerlink" href = "#basic" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > b:
c: 2
< / code > < / pre >
< p > then< / p >
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< pre > < code class = "bash" > yq r sample.yaml b.c
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< / code > < / pre >
< p > will output the value of '2'.< / p >
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< h3 id = "from-stdin" > From Stdin< a class = "headerlink" href = "#from-stdin" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Given a sample.yaml file of:< / p >
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< pre > < code class = "bash" > cat sample.yaml | yq r - b.c
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< / code > < / pre >
< p > will output the value of '2'.< / p >
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< h3 id = "splat" > Splat< a class = "headerlink" href = "#splat" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > ---
bob:
item1:
cats: bananas
item2:
cats: apples
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thing:
cats: oranges
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< / code > < / pre >
< p > then< / p >
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< pre > < code class = "bash" > yq r sample.yaml bob.*.cats
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< / code > < / pre >
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< p > will output< / p >
< pre > < code class = "yaml" > - bananas
- apples
- oranges
< / code > < / pre >
< h3 id = "prefix-splat" > Prefix Splat< a class = "headerlink" href = "#prefix-splat" title = "Permanent link" > ¶ < / a > < / h3 >
< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > ---
bob:
item1:
cats: bananas
item2:
cats: apples
thing:
cats: oranges
< / code > < / pre >
< p > then< / p >
< pre > < code class = "bash" > yq r sample.yaml bob.item*.cats
< / code > < / pre >
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< p > will output< / p >
< pre > < code class = "yaml" > - bananas
- apples
< / code > < / pre >
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< h3 id = "multiple-documents-specify-a-single-document" > Multiple Documents - specify a single document< a class = "headerlink" href = "#multiple-documents-specify-a-single-document" title = "Permanent link" > ¶ < / a > < / h3 >
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< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > something: else
---
b:
c: 2
< / code > < / pre >
< p > then< / p >
< pre > < code class = "bash" > yq r -d1 sample.yaml b.c
< / code > < / pre >
< p > will output the value of '2'.< / p >
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< h3 id = "multiple-documents-read-all-documents" > Multiple Documents - read all documents< a class = "headerlink" href = "#multiple-documents-read-all-documents" title = "Permanent link" > ¶ < / a > < / h3 >
< p > Reading all documents will return the result as an array. This can be converted to json using the '-j' flag if desired.< / p >
< p > Given a sample.yaml file of:< / p >
< pre > < code class = "yaml" > name: Fred
age: 22
---
name: Stella
age: 23
---
name: Android
age: 232
< / code > < / pre >
< p > then< / p >
< pre > < code class = "bash" > yq r -d'*' sample.yaml name
< / code > < / pre >
< p > will output:< / p >
< pre > < code > - Fred
- Stella
- Android
< / code > < / pre >
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< h3 id = "arrays" > Arrays< a class = "headerlink" href = "#arrays" title = "Permanent link" > ¶ < / a > < / h3 >
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< 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 >
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< pre > < code > yq r sample.yaml 'b.e[1].name'
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< / code > < / pre >
< p > will output 'sam'< / p >
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< p > Note that the path is in quotes to avoid the square brackets being interpreted by your shell.< / p >
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< h3 id = "array-splat" > Array Splat< a class = "headerlink" href = "#array-splat" title = "Permanent link" > ¶ < / a > < / h3 >
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< 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 >
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< pre > < code > yq r sample.yaml 'b.e[*].name'
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< / code > < / pre >
< p > will output:< / p >
< pre > < code > - fred
- sam
< / code > < / pre >
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< p > Note that the path is in quotes to avoid the square brackets being interpreted by your shell.< / p >
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< h3 id = "keys-with-dots" > Keys with dots< a class = "headerlink" href = "#keys-with-dots" title = "Permanent link" > ¶ < / 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 >
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< pre > < code class = "bash" > yaml r sample.yaml 'b[foo.bar]'
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< / code > < / pre >
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< pre > < code class = "bash" > yaml w sample.yaml 'b[foo.bar]' 9
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< / code > < / pre >
< p > Any valid yaml key can be specified as part of a key lookup.< / p >
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< p > Note that the path is in quotes to avoid the square brackets being interpreted by your shell.< / p >
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< h3 id = "keys-and-values-with-leading-dashes" > Keys (and values) with leading dashes< a class = "headerlink" href = "#keys-and-values-with-leading-dashes" title = "Permanent link" > ¶ < / a > < / h3 >
< p > If a key or value has leading dashes, yq won't know that you are passing a value as opposed to a flag (and you will get a 'bad flag syntax' error).< / p >
< p > To fix that, you will need to tell it to stop processing flags by adding '--' after the last flag like so:< / p >
< pre > < code class = "bash" > yq n -t -- --key --value
< / code > < / pre >
< p > Will result in< / p >
< p > < code > `
--key: --value< / code > < / p >
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