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add new option extensionAlias which maps extension to extension alias
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| MIT License http://www.opensource.org/licenses/mit-license.php | ||
| Author Ivan Kopeykin @vankop | ||
| */ | ||
|
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| "use strict"; | ||
|
|
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| const forEachBail = require("./forEachBail"); | ||
|
|
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| /** @typedef {import("./Resolver")} Resolver */ | ||
| /** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */ | ||
| /** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */ | ||
| /** @typedef {{ alias: string|string[], extension: string }} ExtensionAliasOption */ | ||
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| module.exports = class ExtensionAliasPlugin { | ||
| /** | ||
| * @param {string | ResolveStepHook} source source | ||
| * @param {ExtensionAliasOption} options options | ||
| * @param {string | ResolveStepHook} target target | ||
| */ | ||
| constructor(source, options, target) { | ||
| this.source = source; | ||
| this.options = options; | ||
| this.target = target; | ||
| } | ||
|
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| /** | ||
| * @param {Resolver} resolver the resolver | ||
| * @returns {void} | ||
| */ | ||
| apply(resolver) { | ||
| const target = resolver.ensureHook(this.target); | ||
| const { extension, alias: aliasArray } = this.options; | ||
| resolver | ||
| .getHook(this.source) | ||
| .tapAsync("ExtensionAliasPlugin", (request, resolveContext, callback) => { | ||
| const requestPath = request.path; | ||
| if (!requestPath || !requestPath.endsWith(extension)) return callback(); | ||
| const resolve = (alias, callback) => { | ||
| resolver.doResolve( | ||
| target, | ||
| { | ||
| ...request, | ||
| path: `${requestPath.slice(0, -extension.length)}${alias}`, | ||
| relativePath: request.relativePath | ||
| ? `${request.relativePath.slice(0, -extension.length)}${alias}` | ||
| : request.relativePath | ||
| }, | ||
| `aliased from extension alias with mapping '${extension}' to '${alias}'`, | ||
| resolveContext, | ||
| callback | ||
| ); | ||
| }; | ||
|
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| if (aliasArray.length > 1) { | ||
| forEachBail(aliasArray, resolve, callback); | ||
| } else { | ||
| resolve(aliasArray[0], callback); | ||
| } | ||
| }); | ||
| } | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| const path = require("path"); | ||
| const fs = require("fs"); | ||
| const should = require("should"); | ||
|
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| const CachedInputFileSystem = require("../lib/CachedInputFileSystem"); | ||
| const ResolverFactory = require("../lib/ResolverFactory"); | ||
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| /** @typedef {import("../lib/util/entrypoints").ImportsField} ImportsField */ | ||
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| describe("extension-alias", () => { | ||
| const fixture = path.resolve(__dirname, "fixtures", "extension-alias"); | ||
| const nodeFileSystem = new CachedInputFileSystem(fs, 4000); | ||
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| const resolver = ResolverFactory.createResolver({ | ||
| extensions: [".js"], | ||
| fileSystem: nodeFileSystem, | ||
| mainFiles: ["index.js"], | ||
| extensionAlias: { | ||
| ".js": [".ts", ".js"] | ||
| } | ||
| }); | ||
|
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| it("should alias fully specified file", done => { | ||
| resolver.resolve({}, fixture, "./index.js", {}, (err, result) => { | ||
| if (err) return done(err); | ||
| should(result).be.eql(path.resolve(fixture, "index.ts")); | ||
| done(); | ||
| }); | ||
| }); | ||
|
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| it("should alias specified extension", done => { | ||
| resolver.resolve({}, fixture, "./dir", {}, (err, result) => { | ||
| if (err) return done(err); | ||
| should(result).be.eql(path.resolve(fixture, "dir", "index.ts")); | ||
| done(); | ||
| }); | ||
| }); | ||
|
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| it("should result successfully without aliasing #1", done => { | ||
| resolver.resolve({}, fixture, "./dir2", {}, (err, result) => { | ||
| if (err) return done(err); | ||
| should(result).be.eql(path.resolve(fixture, "dir2", "index.js")); | ||
| done(); | ||
| }); | ||
| }); | ||
|
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| it("should result successfully without aliasing #2", done => { | ||
| resolver.resolve({}, fixture, "./dir2/index.js", {}, (err, result) => { | ||
| if (err) return done(err); | ||
| should(result).be.eql(path.resolve(fixture, "dir2", "index.js")); | ||
| done(); | ||
| }); | ||
| }); | ||
|
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| describe("should result successfully without alias array", () => { | ||
| const resolver = ResolverFactory.createResolver({ | ||
| extensions: [".js"], | ||
| fileSystem: nodeFileSystem, | ||
| mainFiles: ["index.js"], | ||
| extensionAlias: { | ||
| ".js": [] | ||
| } | ||
| }); | ||
|
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| it("directory", done => { | ||
| resolver.resolve({}, fixture, "./dir2", {}, (err, result) => { | ||
| if (err) return done(err); | ||
| should(result).be.eql(path.resolve(fixture, "dir2", "index.js")); | ||
| done(); | ||
| }); | ||
| }); | ||
|
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| it("file", done => { | ||
| resolver.resolve({}, fixture, "./dir2/index.js", {}, (err, result) => { | ||
| if (err) return done(err); | ||
| should(result).be.eql(path.resolve(fixture, "dir2", "index.js")); | ||
| done(); | ||
| }); | ||
| }); | ||
| }); | ||
| }); |
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