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y
yq
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y
yq
v4.x
yq
Upgrading from V3
Commands
Evaluate
Evaluate All
Shell Completion
Operators
Add
Alternative (Default value)
Anchor and Alias Operators
Assign (Update)
Boolean Operators
Collect into Array
Comment Operators
Contains
Create, Collect into Object
Delete
Document Index
Entries
Env Variable Operators
Equals
File Operators
Has
Keys
Length
Multiply (Merge)
Path
Pipe
Recursive Descent (Glob)
Reduce
Select
Sort Keys
Split into Documents
String Operators
Style
Subtract
Tag
Traverse (Read)
Union
Unique
Variable Operators
With
Usage
Output format
Working with Properties
Working with JSON
Front Matter
GitHub Action
Tips, Tricks, Troubleshooting
Github Page
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Create, Collect into Object
This is used to construct objects (or maps). This can be used against existing yaml, or to create fresh yaml documents.
Collect empty object
Running
1
yq
eval
--null-input
'{}'
Copied!
will output
1
{
}
Copied!
Wrap (prefix) existing object
Given a sample.yml file of:
1
name
:
Mike
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then
1
yq
eval
'{"wrap": .}'
sample.yml
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will output
1
wrap
:
2
name
:
Mike
Copied!
Using splat to create multiple objects
Given a sample.yml file of:
1
name
:
Mike
2
pets
:
3
-
cat
4
-
dog
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then
1
yq
eval
'{.name: .pets.[]}'
sample.yml
Copied!
will output
1
Mike
:
cat
2
Mike
:
dog
Copied!
Working with multiple documents
Given a sample.yml file of:
1
name
:
Mike
2
pets
:
3
-
cat
4
-
dog
5
---
6
name
:
Rosey
7
pets
:
8
-
monkey
9
-
sheep
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then
1
yq
eval
'{.name: .pets.[]}'
sample.yml
Copied!
will output
1
Mike
:
cat
2
Mike
:
dog
3
Rosey
:
monkey
4
Rosey
:
sheep
Copied!
Creating yaml from scratch
Running
1
yq
eval
--null-input
'{"wrap": "frog"}'
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will output
1
wrap
:
frog
Copied!
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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