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