δyƒƒ /ˈdʏf/

A diff tool for YAML files, and sometimes JSON

Objectives

• Easy to use command line interface with natural language design
• Human friendly output through emphasising structures and content specific colours
• Very compact and easy to understand differences report
• Emulate BOSH v1 deployment delta output look and feel
• JSON to YAML and vice versa conversion that preserves the order of entries in maps (hashes)
• Usage of Go to actually learn the language (and have simple to distribute binaries)

Description

The dyff tool will only show the differences between the files by displaying by their path (location inside the YAML tree) and the respective change. The input location can either be a local file or a URI. Also, reading from STDIN is supported by using - as the filename. The default report style is loosely based upon the old BOSH v1 deployment delta output. The path style is based on the Dot-style that is used by Spruce. As an alternative, you can specify to display paths by using the go-patch style. Have a look in the help section of the respective subcommand to see more options.

As a side effect, dyff can convert YAML to JSON and vice versa while preserving the order of keys in hashes from the input document.

Examples

• Show the differences between two versions of cf-deployment:

  dyff between \
    https://raw.githubusercontent.com/cloudfoundry/cf-deployment/v1.19.0/cf-deployment.yml \
    https://raw.githubusercontent.com/cloudfoundry/cf-deployment/v1.20.0/cf-deployment.yml
  

• Convert a YAML file to JSON

  dyff json https://raw.githubusercontent.com/cloudfoundry/cf-deployment/v1.19.0/cf-deployment.yml
  

• Convert a JSON file to YAML

  dyff yaml https://raw.githubusercontent.com/HeavyWombat/dyff/develop/assets/bosh-yaml/manifest.json