74 lines
2.2 KiB
JavaScript
74 lines
2.2 KiB
JavaScript
"use strict";
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/**
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* refer: https://github.com/mysticatea/eslint-plugin-node/blob/f45c6149be7235c0f7422d1179c25726afeecd83/lib/util/get-package-json.js
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*/
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.getPackageJson = getPackageJson;
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const fs_1 = __importDefault(require("fs"));
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const path_1 = __importDefault(require("path"));
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const cache_1 = require("./cache");
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const isRunOnBrowser = !fs_1.default.readFileSync;
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const cache = (0, cache_1.createCache)();
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/**
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* Reads the `package.json` data in a given path.
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*
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* Don't cache the data.
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*
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* @param dir The path to a directory to read.
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* @returns The read `package.json` data, or null.
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*/
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function readPackageJson(dir) {
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if (isRunOnBrowser)
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return null;
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const filePath = path_1.default.join(dir, 'package.json');
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try {
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const text = fs_1.default.readFileSync(filePath, 'utf8');
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const data = JSON.parse(text);
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if (typeof data === 'object' && data !== null) {
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data.filePath = filePath;
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return data;
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}
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}
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catch (_err) {
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// do nothing.
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}
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return null;
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}
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/**
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* Gets a `package.json` data.
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* The data is cached if found, then it's used after.
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* @param startPath A file path to lookup.
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* @returns A found `package.json` data or `null`.
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* This object have additional property `filePath`.
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*/
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function getPackageJson(startPath = 'a.js') {
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if (isRunOnBrowser)
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return null;
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const startDir = path_1.default.dirname(path_1.default.resolve(startPath));
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let dir = startDir;
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let prevDir = '';
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let data = null;
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do {
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data = cache.get(dir);
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if (data) {
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if (dir !== startDir) {
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cache.set(startDir, data);
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}
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return data;
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}
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data = readPackageJson(dir);
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if (data) {
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cache.set(dir, data);
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cache.set(startDir, data);
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return data;
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}
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// Go to next.
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prevDir = dir;
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dir = path_1.default.resolve(dir, '..');
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} while (dir !== prevDir);
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cache.set(startDir, null);
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return null;
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}
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