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feat: initial impl of PathsPlugin, refs #156
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| import { setupTs, readConfigFile, LoaderConfig } from './instance'; | ||
| import * as path from 'path'; | ||
|
|
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| const ModulesInRootPlugin: new (a: string, b: string, c: string) => ResolverPlugin | ||
| = require('enhanced-resolve/lib/ModulesInRootPlugin'); | ||
|
|
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| const createInnerCallback: CreateInnerCallback = require('enhanced-resolve/lib/createInnerCallback'); | ||
| const getInnerRequest: getInnerRequest = require('enhanced-resolve/lib/getInnerRequest'); | ||
|
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| type CreateInnerCallback = (callback: Callback, options: Callback, message?: string, messageOptional?: string) => Callback; | ||
| type getInnerRequest = (resolver: Resolver, request: Request) => string; | ||
|
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| export interface Request { | ||
| request?: Request; | ||
| relativePath: string; | ||
| } | ||
|
|
||
| export interface Callback { | ||
| (err?: Error, result?: any): void; | ||
|
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| log?: any; | ||
| stack?: any; | ||
| missing?: any; | ||
| } | ||
|
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| type ResolverCallback = (request: Request, callback: Callback) => void; | ||
|
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| interface ResolverPlugin { | ||
| apply(resolver: Resolver): void; | ||
| } | ||
|
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| export interface Resolver { | ||
| apply(plugin: ResolverPlugin): void; | ||
| plugin(source: string, cb: ResolverCallback); | ||
| doResolve(target: string, req: Request, desc: string, Callback); | ||
| join(relativePath: string, innerRequest: Request): Request; | ||
| } | ||
|
|
||
| interface Mapping { | ||
| onlyModule: boolean; | ||
| alias: string; | ||
| aliasPattern: RegExp; | ||
| target: string; | ||
| } | ||
|
|
||
| function escapeRegExp(str) { | ||
| return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&"); | ||
| } | ||
|
|
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| export class PathsPlugin implements ResolverPlugin { | ||
| source: string; | ||
| target: string; | ||
| ts: typeof ts; | ||
| configFilePath: string; | ||
| options: ts.CompilerOptions; | ||
|
|
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| baseUrl: string; | ||
| mappings: Mapping[]; | ||
| absoluteBaseUrl: string; | ||
|
|
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| constructor(config: LoaderConfig & ts.CompilerOptions = {} as any) { | ||
| this.source = 'described-resolve'; | ||
| this.target = 'resolve'; | ||
|
|
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| this.ts = setupTs(config.compiler).tsImpl; | ||
|
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| let { configFilePath, compilerConfig } = readConfigFile(process.cwd(), config, this.ts); | ||
| this.options = compilerConfig.options; | ||
| this.configFilePath = configFilePath; | ||
|
|
||
| this.baseUrl = this.options.baseUrl; | ||
| this.absoluteBaseUrl = path.resolve( | ||
| path.dirname(this.configFilePath), | ||
| this.baseUrl | ||
| ); | ||
|
|
||
| this.mappings = []; | ||
| let paths = this.options.paths || {}; | ||
| Object.keys(paths).forEach(alias => { | ||
| let onlyModule = alias.indexOf('*') === -1; | ||
| let excapedAlias = escapeRegExp(alias); | ||
| let targets = paths[alias]; | ||
| targets.forEach(target => { | ||
| let aliasPattern: RegExp; | ||
| if (onlyModule) { | ||
| aliasPattern = new RegExp(`^${excapedAlias}$`); | ||
| } else { | ||
| let withStarCapturing = excapedAlias.replace('\\*', '(.*)'); | ||
| aliasPattern = new RegExp(`^${withStarCapturing}`); | ||
| } | ||
|
|
||
| this.mappings.push({ | ||
| onlyModule, | ||
| alias, | ||
| aliasPattern, | ||
| target: target | ||
| }); | ||
| }); | ||
| }); | ||
| } | ||
|
|
||
| apply(resolver: Resolver) { | ||
| let { baseUrl, mappings } = this; | ||
|
|
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| if (baseUrl) { | ||
| resolver.apply(new ModulesInRootPlugin("module", this.absoluteBaseUrl, "resolve")); | ||
| } | ||
|
|
||
| mappings.forEach(mapping => { | ||
| resolver.plugin(this.source, this.createPlugin(resolver, mapping)); | ||
| }); | ||
| } | ||
|
|
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| createPlugin(resolver: Resolver, mapping: Mapping) { | ||
| return (request, callback) => { | ||
| let innerRequest = getInnerRequest(resolver, request); | ||
| if (!innerRequest) { | ||
| return callback(); | ||
| } | ||
|
|
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| let match = innerRequest.match(mapping.aliasPattern); | ||
| if (!match) { | ||
| return callback(); | ||
| } | ||
|
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| let newRequestStr = mapping.target; | ||
| if (!mapping.onlyModule) { | ||
| newRequestStr = newRequestStr.replace('*', match[1]); | ||
| } | ||
|
|
||
| if (newRequestStr[0] === '.') { | ||
| newRequestStr = path.resolve(this.absoluteBaseUrl, newRequestStr); | ||
| } | ||
|
|
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| let newRequest: Request = Object.assign({}, request, { | ||
| request: newRequestStr | ||
| }); | ||
|
|
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| return resolver.doResolve( | ||
| this.target, | ||
| newRequest, | ||
| "aliased with mapping '" + innerRequest + "': '" + mapping.alias + "' to '" + newRequestStr + "'", | ||
| createInnerCallback( | ||
| function(err, result) { | ||
| console.log(err, result, arguments.length > 0); | ||
| if (arguments.length > 0) { | ||
| return callback(err, result); | ||
| } | ||
|
|
||
| // don't allow other aliasing or raw request | ||
| callback(null, null); | ||
| }, | ||
| callback | ||
| ) | ||
| ); | ||
| }; | ||
| } | ||
| } |
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