dasel

name	dasel
description	Use this skill when the user wants to query, update, or convert structured data files like JSON, TOML, YAML, XML, INI, HCL, or CSV.

dasel Plugin

Select, put and delete data from JSON, TOML, YAML, XML, INI, HCL and CSV files with a single tool. A query and update tool for structured data files.

Commands

Data Operations

• dasel data select — Select data from structured files
• dasel data put — Put data into structured files

Utility

• dasel _ _ — Passthrough to dasel CLI

Usage Examples

• "Select value from YAML"
• "Update JSON file"
• "Convert TOML to JSON"
• "Query XML file"

Installation

brew install dasel

Or via Go:

go install github.com/TomWright/dasel/cmd/dasel@latest

Examples

# Select value from JSON
dasel data select '.name' -p json -f data.json

# Select nested value
dasel data select '.user.name' -p json -f data.json

# Select array element
dasel data select '.items[0]' -p json -f data.json

# Put value into file
dasel data put '.name' 'new value' -p json -f data.json

# Put with type
dasel data put '.count' '42' -t int -p json -f data.json

# Convert YAML to JSON
dasel data select '.' -p yaml -f data.yaml -w json

# Convert TOML to YAML
dasel data select '.' -p toml -f data.toml -w yaml

# Any dasel command with passthrough
dasel _ _ '.name' -p json -f data.json
dasel _ put '.version' '1.0.0' -p toml -f data.toml

Key Features

• Multiple formats - JSON, TOML, YAML, XML, INI, HCL, CSV
• Format conversion - Convert between any supported formats
• Query - Select data with simple selectors
• Update - Put data into files
• Delete - Remove data from files
• Type support - String, int, bool types
• Nested queries - Access deeply nested data
• Array access - Select array elements
• Cross-platform - Linux, macOS, Windows
• Simple syntax - Easy to learn selector language

Notes

• Selector syntax uses dot notation
• Can convert between formats
• In-place file editing
• Perfect for config file management
• Works with CI/CD pipelines