text: "use strict";
  
  Object.defineProperty(exports, "__esModule", {
    value: true
  });
  exports.makeStaticFileCache = makeStaticFileCache;
  
  var _caching = require("../caching");
  
  var fs = _interopRequireWildcard(require("../../gensync-utils/fs"));
  
  function _fs2() {
    const data = _interopRequireDefault(require("fs"));
  
    _fs2 = function () {
      return data;
    };
  
    return data;
  }
  
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
  
  function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
  
  function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (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; }
  
  function makeStaticFileCache(fn) {
    return (0, _caching.makeStrongCache)(function* (filepath, cache) {
      const cached = cache.invalidate(() => fileMtime(filepath));
  
      if (cached === null) {
        return null;
      }
  
      return fn(filepath, yield* fs.readFile(filepath, "utf8"));
    });
  }
  
  function fileMtime(filepath) {
    try {
      return +_fs2().default.statSync(filepath).mtime;
    } catch (e) {
      if (e.code !== "ENOENT" && e.code !== "ENOTDIR") throw e;
    }
  
    return null;
  }