processExportInfo.js
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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;