eslint-plugin-tsdoc
Version:
An ESLint plugin that validates TypeScript doc comments
107 lines • 5.07 kB
JavaScript
;
// Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.
// See LICENSE in the project root for license information.
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ConfigCache = void 0;
const tsdoc_config_1 = require("@microsoft/tsdoc-config");
const path = __importStar(require("path"));
const Debug_1 = require("./Debug");
// How often to check for modified input files. If a file's modification timestamp has changed, then we will
// evict the cache entry immediately.
const CACHE_CHECK_INTERVAL_MS = 3 * 1000;
// Evict old entries from the cache after this much time, regardless of whether the file was detected as being
// modified or not.
const CACHE_EXPIRE_MS = 20 * 1000;
// If this many objects accumulate in the cache, then it is cleared to avoid a memory leak.
const CACHE_MAX_SIZE = 100;
class ConfigCache {
/**
* Node.js equivalent of performance.now().
*/
static _getTimeInMs() {
const [seconds, nanoseconds] = process.hrtime();
return seconds * 1000 + nanoseconds / 1000000;
}
static getForSourceFile(sourceFilePath) {
const sourceFileFolder = path.dirname(path.resolve(sourceFilePath));
// First, determine the file to be loaded. If not found, the configFilePath will be an empty string.
const configFilePath = tsdoc_config_1.TSDocConfigFile.findConfigPathForFolder(sourceFileFolder);
// If configFilePath is an empty string, then we'll use the folder of sourceFilePath as our cache key
// (instead of an empty string)
const cacheKey = configFilePath || sourceFileFolder + '/';
Debug_1.Debug.log(`Cache key: "${cacheKey}"`);
const nowMs = ConfigCache._getTimeInMs();
let cachedConfig = undefined;
// Do we have a cached object?
cachedConfig = ConfigCache._cachedConfigs.get(cacheKey);
if (cachedConfig) {
Debug_1.Debug.log('Cache hit');
// Is the cached object still valid?
const loadAgeMs = nowMs - cachedConfig.loadTimeMs;
const lastCheckAgeMs = nowMs - cachedConfig.lastCheckTimeMs;
if (loadAgeMs > CACHE_EXPIRE_MS || loadAgeMs < 0) {
Debug_1.Debug.log('Evicting because item is expired');
cachedConfig = undefined;
ConfigCache._cachedConfigs.delete(cacheKey);
}
else if (lastCheckAgeMs > CACHE_CHECK_INTERVAL_MS || lastCheckAgeMs < 0) {
Debug_1.Debug.log('Checking for modifications');
cachedConfig.lastCheckTimeMs = nowMs;
if (cachedConfig.configFile.checkForModifiedFiles()) {
// Invalidate the cache because it failed to load completely
Debug_1.Debug.log('Evicting because item was modified');
cachedConfig = undefined;
ConfigCache._cachedConfigs.delete(cacheKey);
}
}
}
// Load the object
if (!cachedConfig) {
if (ConfigCache._cachedConfigs.size > CACHE_MAX_SIZE) {
Debug_1.Debug.log('Clearing cache');
ConfigCache._cachedConfigs.clear(); // avoid a memory leak
}
const configFile = tsdoc_config_1.TSDocConfigFile.loadFile(configFilePath);
if (configFile.fileNotFound) {
Debug_1.Debug.log(`File not found: "${configFilePath}"`);
}
else {
Debug_1.Debug.log(`Loaded: "${configFilePath}"`);
}
cachedConfig = {
configFile,
lastCheckTimeMs: nowMs,
loadTimeMs: nowMs
};
ConfigCache._cachedConfigs.set(cacheKey, cachedConfig);
}
return cachedConfig.configFile;
}
}
exports.ConfigCache = ConfigCache;
// findConfigPathForFolder() result --> loaded tsdoc.json configuration
ConfigCache._cachedConfigs = new Map();
//# sourceMappingURL=ConfigCache.js.map