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- "use strict";
- const path = require("path");
- const DescriptionFileUtils = require("./DescriptionFileUtils");
- const forEachBail = require("./forEachBail");
- const { processImportsField } = require("./util/entrypoints");
- const { parseIdentifier } = require("./util/identifier");
- const { checkImportsExportsFieldTarget } = require("./util/path");
- const dotCode = ".".charCodeAt(0);
- module.exports = class ImportsFieldPlugin {
-
- constructor(
- source,
- conditionNames,
- fieldNamePath,
- targetFile,
- targetPackage
- ) {
- this.source = source;
- this.targetFile = targetFile;
- this.targetPackage = targetPackage;
- this.conditionNames = conditionNames;
- this.fieldName = fieldNamePath;
-
- this.fieldProcessorCache = new WeakMap();
- }
-
- apply(resolver) {
- const targetFile = resolver.ensureHook(this.targetFile);
- const targetPackage = resolver.ensureHook(this.targetPackage);
- resolver
- .getHook(this.source)
- .tapAsync("ImportsFieldPlugin", (request, resolveContext, callback) => {
-
- if (!request.descriptionFilePath || request.request === undefined) {
- return callback();
- }
- const remainingRequest =
- request.request + request.query + request.fragment;
- const importsField =
-
- (
- DescriptionFileUtils.getField(
- (request.descriptionFileData),
- this.fieldName
- )
- );
- if (!importsField) return callback();
- if (request.directory) {
- return callback(
- new Error(
- `Resolving to directories is not possible with the imports field (request was ${remainingRequest}/)`
- )
- );
- }
-
- let paths;
- try {
-
-
-
- let fieldProcessor = this.fieldProcessorCache.get(
- (request.descriptionFileData)
- );
- if (fieldProcessor === undefined) {
- fieldProcessor = processImportsField(importsField);
- this.fieldProcessorCache.set(
- (request.descriptionFileData),
- fieldProcessor
- );
- }
- paths = fieldProcessor(remainingRequest, this.conditionNames);
- } catch ( err) {
- if (resolveContext.log) {
- resolveContext.log(
- `Imports field in ${request.descriptionFilePath} can't be processed: ${err}`
- );
- }
- return callback( (err));
- }
- if (paths.length === 0) {
- return callback(
- new Error(
- `Package import ${remainingRequest} is not imported from package ${request.descriptionFileRoot} (see imports field in ${request.descriptionFilePath})`
- )
- );
- }
- forEachBail(
- paths,
-
- (p, callback) => {
- const parsedIdentifier = parseIdentifier(p);
- if (!parsedIdentifier) return callback();
- const [path_, query, fragment] = parsedIdentifier;
- const error = checkImportsExportsFieldTarget(path_);
- if (error) {
- return callback(error);
- }
- switch (path_.charCodeAt(0)) {
-
- case dotCode: {
-
- const obj = {
- ...request,
- request: undefined,
- path: path.join(
- (request.descriptionFileRoot),
- path_
- ),
- relativePath: path_,
- query,
- fragment
- };
- resolver.doResolve(
- targetFile,
- obj,
- "using imports field: " + p,
- resolveContext,
- callback
- );
- break;
- }
-
- default: {
-
- const obj = {
- ...request,
- request: path_,
- relativePath: path_,
- fullySpecified: true,
- query,
- fragment
- };
- resolver.doResolve(
- targetPackage,
- obj,
- "using imports field: " + p,
- resolveContext,
- callback
- );
- }
- }
- },
-
- (err, result) => callback(err, result || null)
- );
- });
- }
- };
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