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Edit File: loadDefinedFile.js

'use strict';

var yaml = require('js-yaml');
var requireFromString = require('require-from-string');
var readFile = require('./readFile');
var parseJson = require('./parseJson');

module.exports = function (filepath, options) {
  return readFile(filepath, { throwNotFound: true }).then(function (content) {
    var parsedConfig = (function () {
      switch (options.format) {
        case 'json':
          return parseJson(content, filepath);
        case 'yaml':
          return yaml.safeLoad(content, {
            filename: filepath,
          });
        case 'js':
          return requireFromString(content, filepath);
        default:
          return tryAllParsing(content, filepath);
      }
    })();

if (!parsedConfig) {
      throw new Error(
        'Failed to parse "' + filepath + '" as JSON, JS, or YAML.'
      );
    }

return {
      config: parsedConfig,
      filepath: filepath,
    };
  });
};

function tryAllParsing(content, filepath) {
  return tryYaml(content, filepath, function () {
    return tryRequire(content, filepath, function () {
      return null;
    });
  });
}

function tryRequire(content, filepath, cb) {
  try {
    return requireFromString(content, filepath);
  } catch (e) {
    return cb();
  }
}

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