"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getLinuxDistributionInfoSync = getLinuxDistributionInfoSync;
var fs = _interopRequireWildcard(require("fs"));
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
/**
 * Copyright 2017 Google Inc. All rights reserved.
 * Modifications copyright (c) Microsoft Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

let didFailToReadOSRelease = false;
let osRelease;
function getLinuxDistributionInfoSync() {
  if (process.platform !== 'linux') return undefined;
  if (!osRelease && !didFailToReadOSRelease) {
    try {
      var _fields$get, _fields$get2;
      // List of /etc/os-release values for different distributions could be
      // found here: https://gist.github.com/aslushnikov/8ceddb8288e4cf9db3039c02e0f4fb75
      const osReleaseText = fs.readFileSync('/etc/os-release', 'utf8');
      const fields = parseOSReleaseText(osReleaseText);
      osRelease = {
        id: (_fields$get = fields.get('id')) !== null && _fields$get !== void 0 ? _fields$get : '',
        version: (_fields$get2 = fields.get('version_id')) !== null && _fields$get2 !== void 0 ? _fields$get2 : ''
      };
    } catch (e) {
      didFailToReadOSRelease = true;
    }
  }
  return osRelease;
}
function parseOSReleaseText(osReleaseText) {
  const fields = new Map();
  for (const line of osReleaseText.split('\n')) {
    const tokens = line.split('=');
    const name = tokens.shift();
    let value = tokens.join('=').trim();
    if (value.startsWith('"') && value.endsWith('"')) value = value.substring(1, value.length - 1);
    if (!name) continue;
    fields.set(name.toLowerCase(), value);
  }
  return fields;
}