mirror of https://github.com/webpack/webpack.git
78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Author Tobias Koppers @sokra
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const Parser = require("../Parser");
|
|
const JsonExportsDependency = require("../dependencies/JsonExportsDependency");
|
|
const memoize = require("../util/memoize");
|
|
const JsonData = require("./JsonData");
|
|
|
|
/** @typedef {import("../../declarations/plugins/JsonModulesPluginParser").JsonModulesPluginParserOptions} JsonModulesPluginParserOptions */
|
|
/** @typedef {import("../Module").BuildInfo} BuildInfo */
|
|
/** @typedef {import("../Module").BuildMeta} BuildMeta */
|
|
/** @typedef {import("../Parser").ParserState} ParserState */
|
|
/** @typedef {import("../Parser").PreparsedAst} PreparsedAst */
|
|
/** @typedef {import("./JsonModulesPlugin").JsonValue} JsonValue */
|
|
|
|
const getParseJson = memoize(() => require("json-parse-even-better-errors"));
|
|
|
|
class JsonParser extends Parser {
|
|
/**
|
|
* @param {JsonModulesPluginParserOptions} options parser options
|
|
*/
|
|
constructor(options) {
|
|
super();
|
|
this.options = options || {};
|
|
}
|
|
|
|
/**
|
|
* @param {string | Buffer | PreparsedAst} source the source to parse
|
|
* @param {ParserState} state the parser state
|
|
* @returns {ParserState} the parser state
|
|
*/
|
|
parse(source, state) {
|
|
if (Buffer.isBuffer(source)) {
|
|
source = source.toString("utf-8");
|
|
}
|
|
|
|
/** @type {NonNullable<JsonModulesPluginParserOptions["parse"]>} */
|
|
const parseFn =
|
|
typeof this.options.parse === "function"
|
|
? this.options.parse
|
|
: getParseJson();
|
|
/** @type {Buffer | JsonValue | undefined} */
|
|
let data;
|
|
try {
|
|
data =
|
|
typeof source === "object"
|
|
? source
|
|
: parseFn(source[0] === "\uFEFF" ? source.slice(1) : source);
|
|
} catch (err) {
|
|
throw new Error(
|
|
`Cannot parse JSON: ${/** @type {Error} */ (err).message}`
|
|
);
|
|
}
|
|
const jsonData = new JsonData(/** @type {Buffer | JsonValue} */ (data));
|
|
const buildInfo = /** @type {BuildInfo} */ (state.module.buildInfo);
|
|
buildInfo.jsonData = jsonData;
|
|
buildInfo.strict = true;
|
|
const buildMeta = /** @type {BuildMeta} */ (state.module.buildMeta);
|
|
buildMeta.exportsType = "default";
|
|
buildMeta.defaultObject =
|
|
typeof data === "object" ? "redirect-warn" : false;
|
|
state.module.addDependency(
|
|
new JsonExportsDependency(
|
|
jsonData,
|
|
/** @type {number} */
|
|
(this.options.exportsDepth)
|
|
)
|
|
);
|
|
return state;
|
|
}
|
|
}
|
|
|
|
module.exports = JsonParser;
|