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7dfae77 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | /*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Natsu @xiaoxiaojx
*/
"use strict";
const stripJsonComments = require("./strip-json-comments");
/** @typedef {import("../Resolver").FileSystem} FileSystem */
/**
* @typedef {object} ReadJsonOptions
* @property {boolean=} stripComments Whether to strip JSONC comments
*/
/**
* Read and parse JSON file (supports JSONC with comments)
* @template T
* @param {FileSystem} fileSystem the file system
* @param {string} jsonFilePath absolute path to JSON file
* @param {ReadJsonOptions} options Options
* @returns {Promise<T>} parsed JSON content
*/
async function readJson(fileSystem, jsonFilePath, options = {}) {
const { stripComments = false } = options;
const { readJson } = fileSystem;
if (readJson && !stripComments) {
return new Promise((resolve, reject) => {
readJson(jsonFilePath, (err, content) => {
if (err) return reject(err);
resolve(/** @type {T} */ (content));
});
});
}
const buf = await new Promise((resolve, reject) => {
fileSystem.readFile(jsonFilePath, (err, data) => {
if (err) return reject(err);
resolve(data);
});
});
const jsonText = /** @type {string} */ (buf.toString());
// Strip comments to support JSONC (e.g., tsconfig.json with comments)
const jsonWithoutComments = stripComments
? stripJsonComments(jsonText, { trailingCommas: true, whitespace: true })
: jsonText;
return JSON.parse(jsonWithoutComments);
}
module.exports.readJson = readJson;
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