netlify-cli/src/utils/addons/diffs/index.js

Netlify command line tool

const concordance = require('concordance')

const { concordanceOptions, concordanceDiffOptions } = require('./options')

const formatDescriptorDiff = function (actualDescriptor, expectedDescriptor, options) {
  const diffOptions = { ...options, ...concordanceDiffOptions }
  return concordance.diffDescriptors(actualDescriptor, expectedDescriptor, diffOptions)
}

module.exports = function diffValues(actual, expected) {
  const result = concordance.compare(actual, expected, concordanceOptions)
  if (result.pass) {
    return null
  }
  const actualDescriptor = result.actual || concordance.describe(actual, concordanceOptions)
  const expectedDescriptor = result.expected || concordance.describe(expected, concordanceOptions)

  return formatDescriptorDiff(actualDescriptor, expectedDescriptor)
}