Create, Collect into Object

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This is used to construct objects (or maps). This can be used against existing yaml, or to create fresh yaml documents.
Note that versions prior to 4.18 require the 'eval/e' command to be specified.
yq e <exp> <file>
Collect empty object
Running
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yq --null-input '{}'
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will output
1
{}
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Wrap (prefix) existing object
Given a sample.yml file of:
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name: Mike
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then
1
yq '{"wrap": .}' sample.yml
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will output
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wrap:
2
  name: Mike
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Using splat to create multiple objects
Given a sample.yml file of:
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name: Mike
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pets:
3
  - cat
4
  - dog
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then
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yq '{.name: .pets.[]}' sample.yml
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will output
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Mike: cat
2
Mike: dog
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Working with multiple documents
Given a sample.yml file of:
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name: Mike
2
pets:
3
  - cat
4
  - dog
5
---
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name: Rosey
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pets:
8
  - monkey
9
  - sheep
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then
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yq '{.name: .pets.[]}' sample.yml
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will output
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Mike: cat
2
Mike: dog
3
Rosey: monkey
4
Rosey: sheep
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Creating yaml from scratch
Running
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yq --null-input '{"wrap": "frog"}'
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will output
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wrap: frog
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Creating yaml from scratch with multiple objects
Running
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yq --null-input '(.a.b = "foo") | (.d.e = "bar")'
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will output
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a:
2
  b: foo
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d:
4
  e: bar
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Contains

Date Time

Last modified 1mo ago

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Contents

Collect empty object

Wrap (prefix) existing object

Using splat to create multiple objects

Working with multiple documents

Creating yaml from scratch

Creating yaml from scratch with multiple objects