53 lines
1.6 KiB
JavaScript
53 lines
1.6 KiB
JavaScript
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'use strict';
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exports.__esModule = true;
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const log = require('debug')('eslint-module-utils:ModuleCache');
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/** @type {import('./ModuleCache').ModuleCache} */
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class ModuleCache {
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/** @param {typeof import('./ModuleCache').ModuleCache.prototype.map} map */
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constructor(map) {
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this.map = map || /** @type {{typeof import('./ModuleCache').ModuleCache.prototype.map} */ new Map();
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}
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/** @type {typeof import('./ModuleCache').ModuleCache.prototype.set} */
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set(cacheKey, result) {
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this.map.set(cacheKey, { result, lastSeen: process.hrtime() });
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log('setting entry for', cacheKey);
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return result;
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}
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/** @type {typeof import('./ModuleCache').ModuleCache.prototype.get} */
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get(cacheKey, settings) {
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if (this.map.has(cacheKey)) {
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const f = this.map.get(cacheKey);
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// check freshness
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// @ts-expect-error TS can't narrow properly from `has` and `get`
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if (process.hrtime(f.lastSeen)[0] < settings.lifetime) { return f.result; }
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} else {
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log('cache miss for', cacheKey);
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}
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// cache miss
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return undefined;
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}
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/** @type {typeof import('./ModuleCache').ModuleCache.getSettings} */
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static getSettings(settings) {
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/** @type {ReturnType<typeof ModuleCache.getSettings>} */
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const cacheSettings = Object.assign({
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lifetime: 30, // seconds
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}, settings['import/cache']);
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// parse infinity
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// @ts-expect-error the lack of type overlap is because we're abusing `cacheSettings` as a temporary object
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if (cacheSettings.lifetime === '∞' || cacheSettings.lifetime === 'Infinity') {
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cacheSettings.lifetime = Infinity;
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}
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return cacheSettings;
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}
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}
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exports.default = ModuleCache;
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