astx/cjs/util/formatDiff.js

super powerful structural search and replace for JavaScript and TypeScript to automate your refactoring

'use strict'

var _interopRequireDefault = require('@babel/runtime/helpers/interopRequireDefault')

var _typeof = require('@babel/runtime/helpers/typeof')

Object.defineProperty(exports, '__esModule', {
  value: true,
})
exports['default'] = formatDiff

var diff = _interopRequireWildcard(require('diff'))

var _chalk = _interopRequireDefault(require('chalk'))

function _getRequireWildcardCache(nodeInterop) {
  if (typeof WeakMap !== 'function') return null
  var cacheBabelInterop = new WeakMap()
  var cacheNodeInterop = new WeakMap()
  return (_getRequireWildcardCache = function _getRequireWildcardCache(
    nodeInterop
  ) {
    return nodeInterop ? cacheNodeInterop : cacheBabelInterop
  })(nodeInterop)
}

function _interopRequireWildcard(obj, nodeInterop) {
  if (!nodeInterop && obj && obj.__esModule) {
    return obj
  }

  if (
    obj === null ||
    (_typeof(obj) !== 'object' && typeof obj !== 'function')
  ) {
    return {
      default: obj,
    }
  }

  var cache = _getRequireWildcardCache(nodeInterop)

  if (cache && cache.has(obj)) {
    return cache.get(obj)
  }

  var newObj = {}
  var hasPropertyDescriptor =
    Object.defineProperty && Object.getOwnPropertyDescriptor

  for (var key in obj) {
    if (key !== 'default' && Object.prototype.hasOwnProperty.call(obj, key)) {
      var desc = hasPropertyDescriptor
        ? Object.getOwnPropertyDescriptor(obj, key)
        : null

      if (desc && (desc.get || desc.set)) {
        Object.defineProperty(newObj, key, desc)
      } else {
        newObj[key] = obj[key]
      }
    }
  }

  newObj['default'] = obj

  if (cache) {
    cache.set(obj, newObj)
  }

  return newObj
} // Adapted from the print-diff package
// https://github.com/LinusU/node-print-diff/blob/master/LICENSE
// The MIT License (MIT)
// Copyright (c) 2015 Linus Unnebäck
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

var originalColor = _chalk['default'].red
var modifiedColor = _chalk['default'].green
function rework(line) {
  switch (line[0]) {
    case '+':
      return modifiedColor(line)

    case '-':
      return originalColor(line)
  }

  return line
}

function formatDiff(actual, expected) {
  var patch = diff.createPatch('string', actual, expected)
  var lines = patch.split('\n').slice(4).map(rework)
  return ''
    .concat(originalColor('- original'), ' ')
    .concat(modifiedColor('+ modified'), '\n\n')
    .concat(lines.join('\n'), '\n')
}