compare-files/dist/index.js

Compare files contents

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _fs = require('fs');

var _fs2 = _interopRequireDefault(_fs);

var _path = require('path');

var _path2 = _interopRequireDefault(_path);

var _lodash = require('lodash');

var _lodash2 = _interopRequireDefault(_lodash);

var _jsYaml = require('js-yaml');

var _jsYaml2 = _interopRequireDefault(_jsYaml);

var _ini = require('ini');

var _ini2 = _interopRequireDefault(_ini);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var read = function read(pathToFile) {
  return _fs2.default.readFileSync(pathToFile, 'utf8');
};

var parse = function parse(text, format) {
  var parserMap = {
    '.json': JSON.parse,
    '.yaml': _jsYaml2.default.load,
    '.ini': _ini2.default.parse
  };

  return parserMap[format](text);
};

var buildAST = function buildAST(obj1, obj2) {
  var keys = _lodash2.default.union(_lodash2.default.keys(obj1), _lodash2.default.keys(obj2));

  var ast = keys.map(function (key) {
    var before = obj1[key];
    var after = obj2[key];

    if (before instanceof Object && after instanceof Object) {
      var _node = { key: key, type: 'nested', children: buildAST(before, after) };
      return _node;
    }
    if (before && after) {
      if (before === after) {
        var _node2 = { key: key, type: 'unchanged', before: before };
        return _node2;
      }

      var oldNode = { key: key, type: 'deleted', before: before };
      var newNode = { key: key, type: 'added', after: after };
      return [oldNode, newNode];
    }
    if (!before) {
      var _node3 = { key: key, type: 'added', after: after };
      return _node3;
    }
    var node = { key: key, type: 'deleted', before: before };
    return node;
  });

  return ast;
};

var gendiff = function gendiff(pathToFile1, pathToFile2, renderer) {
  var fileContent1 = parse(read(pathToFile1), _path2.default.extname(pathToFile1));
  var fileContent2 = parse(read(pathToFile2), _path2.default.extname(pathToFile2));

  var ast = buildAST(fileContent1, fileContent2);

  return renderer(ast);
};

exports.default = gendiff;
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