135 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			JavaScript
		
	
	
			
		
		
	
	
			135 lines
		
	
	
		
			3.9 KiB
		
	
	
	
		
			JavaScript
		
	
	
/*
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	MIT License http://www.opensource.org/licenses/mit-license.php
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	Author Maël Nison @arcanis
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*/
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"use strict";
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/** @typedef {import("./Resolver")} Resolver */
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/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
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/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
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/**
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 * @typedef {object} PnpApiImpl
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 * @property {(packageName: string, issuer: string, options: { considerBuiltins: boolean }) => string | null} resolveToUnqualified resolve to unqualified
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 */
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module.exports = class PnpPlugin {
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	/**
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	 * @param {string | ResolveStepHook} source source
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	 * @param {PnpApiImpl} pnpApi pnpApi
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	 * @param {string | ResolveStepHook} target target
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	 * @param {string | ResolveStepHook} alternateTarget alternateTarget
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	 */
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	constructor(source, pnpApi, target, alternateTarget) {
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		this.source = source;
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		this.pnpApi = pnpApi;
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		this.target = target;
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		this.alternateTarget = alternateTarget;
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	}
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	/**
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	 * @param {Resolver} resolver the resolver
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	 * @returns {void}
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	 */
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	apply(resolver) {
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		/** @type {ResolveStepHook} */
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		const target = resolver.ensureHook(this.target);
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		const alternateTarget = resolver.ensureHook(this.alternateTarget);
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		resolver
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			.getHook(this.source)
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			.tapAsync("PnpPlugin", (request, resolveContext, callback) => {
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				const req = request.request;
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				if (!req) return callback();
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				// The trailing slash indicates to PnP that this value is a folder rather than a file
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				const issuer = `${request.path}/`;
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				const packageMatch = /^(@[^/]+\/)?[^/]+/.exec(req);
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				if (!packageMatch) return callback();
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				const [packageName] = packageMatch;
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				const innerRequest = `.${req.slice(packageName.length)}`;
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				/** @type {string|undefined|null} */
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				let resolution;
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				/** @type {string|undefined|null} */
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				let apiResolution;
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				try {
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					resolution = this.pnpApi.resolveToUnqualified(packageName, issuer, {
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						considerBuiltins: false,
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					});
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					if (resolution === null) {
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						// This is either not a PnP managed issuer or it's a Node builtin
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						// Try to continue resolving with our alternatives
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						resolver.doResolve(
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							alternateTarget,
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							request,
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							"issuer is not managed by a pnpapi",
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							resolveContext,
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							(err, result) => {
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								if (err) return callback(err);
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								if (result) return callback(null, result);
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								// Skip alternatives
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								return callback(null, null);
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							},
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						);
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						return;
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					}
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					if (resolveContext.fileDependencies) {
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						apiResolution = this.pnpApi.resolveToUnqualified("pnpapi", issuer, {
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							considerBuiltins: false,
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						});
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					}
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				} catch (/** @type {unknown} */ error) {
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					if (
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						/** @type {Error & { code: string }} */
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						(error).code === "MODULE_NOT_FOUND" &&
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						/** @type {Error & { pnpCode: string }} */
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						(error).pnpCode === "UNDECLARED_DEPENDENCY"
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					) {
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						// This is not a PnP managed dependency.
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						// Try to continue resolving with our alternatives
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						if (resolveContext.log) {
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							resolveContext.log("request is not managed by the pnpapi");
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							for (const line of /** @type {Error} */ (error).message
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								.split("\n")
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								.filter(Boolean)) {
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								resolveContext.log(`  ${line}`);
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							}
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						}
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						return callback();
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					}
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					return callback(/** @type {Error} */ (error));
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				}
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				if (resolution === packageName) return callback();
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				if (apiResolution && resolveContext.fileDependencies) {
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					resolveContext.fileDependencies.add(apiResolution);
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				}
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				/** @type {ResolveRequest} */
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				const obj = {
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					...request,
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					path: resolution,
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					request: innerRequest,
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					ignoreSymlinks: true,
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					fullySpecified: request.fullySpecified && innerRequest !== ".",
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				};
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				resolver.doResolve(
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					target,
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					obj,
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					`resolved by pnp to ${resolution}`,
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					resolveContext,
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					(err, result) => {
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						if (err) return callback(err);
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						if (result) return callback(null, result);
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						// Skip alternatives
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						return callback(null, null);
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					},
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				);
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			});
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	}
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};
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