init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
const { UsageState } = require("../ExportsInfo");
 
/** @typedef {import("../ExportsInfo").ExportInfo} ExportInfo */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
 
/**
 * @param {RuntimeSpec} runtime the runtime
 * @param {string[][]} referencedExports list of referenced exports, will be added to
 * @param {string[]} prefix export prefix
 * @param {ExportInfo=} exportInfo the export info
 * @param {boolean} defaultPointsToSelf when true, using default will reference itself
 * @param {Set<ExportInfo>} alreadyVisited already visited export info (to handle circular reexports)
 */
const processExportInfo = (
    runtime,
    referencedExports,
    prefix,
    exportInfo,
    defaultPointsToSelf = false,
    alreadyVisited = new Set()
) => {
    if (!exportInfo) {
        referencedExports.push(prefix);
        return;
    }
    const used = exportInfo.getUsed(runtime);
    if (used === UsageState.Unused) return;
    if (alreadyVisited.has(exportInfo)) {
        referencedExports.push(prefix);
        return;
    }
    alreadyVisited.add(exportInfo);
    if (
        used !== UsageState.OnlyPropertiesUsed ||
        !exportInfo.exportsInfo ||
        exportInfo.exportsInfo.otherExportsInfo.getUsed(runtime) !==
            UsageState.Unused
    ) {
        alreadyVisited.delete(exportInfo);
        referencedExports.push(prefix);
        return;
    }
    const exportsInfo = exportInfo.exportsInfo;
    for (const exportInfo of exportsInfo.orderedExports) {
        processExportInfo(
            runtime,
            referencedExports,
            defaultPointsToSelf && exportInfo.name === "default"
                ? prefix
                : prefix.concat(exportInfo.name),
            exportInfo,
            false,
            alreadyVisited
        );
    }
    alreadyVisited.delete(exportInfo);
};
module.exports = processExportInfo;