Initial commit of fixed path mappings for awesome-typescript-loader v…

…1.1.1. We could use it across the board. Maybe.

addon/ng2/utilities/ts-path-mappings-webpack-plugin.ts

@@ -0,0 +1,272 @@
+import * as path from 'path';
+import * as ts from 'typescript';
+import * as _ from 'lodash';
+
+const ModulesInRootPlugin: new (a: string, b: string, c: string) => ResolverPlugin = require('enhanced-resolve/lib/ModulesInRootPlugin');
+
+const createInnerCallback: CreateInnerCallback = require('enhanced-resolve/lib/createInnerCallback');
+const getInnerRequest: getInnerRequest = require('enhanced-resolve/lib/getInnerRequest');
+
+export type ResolverCallback = (request: Request, callback: Callback) => void;
+export type QueryOptions = LoaderConfig & ts.CompilerOptions;
+export type TsConfig = ts.ParsedCommandLine;
+
+export type CreateInnerCallback = (callback: Callback, options: Callback, message?: string, messageOptional?: string) => Callback;
+type getInnerRequest = (resolver: Resolver, request: Request) => string;
+
+export interface TSCompilerInfo {
+    compilerPath: string;
+    tsImpl: typeof ts;
+}
+
+export interface Request {
+    request?: Request;
+    relativePath: string;
+}
+
+export interface Callback {
+    (err?: Error, result?: any): void;
+
+    log?: any;
+    stack?: any;
+    missing?: any;
+}
+
+export interface Configs {
+    configFilePath: string;
+    compilerConfig: TsConfig;
+    loaderConfig: LoaderConfig;
+}
+
+export interface LoaderConfig {
+    instanceName?: string;
+    showRecompileReason?: boolean;
+    compiler?: string;
+    emitRequireType?: boolean;
+    reEmitDependentFiles?: boolean;
+    tsconfig?: string;
+    useWebpackText?: boolean;
+    externals?: string[];
+    doTypeCheck?: boolean;
+    ignoreDiagnostics?: number[];
+    forkChecker?: boolean;
+    forkCheckerSilent?: boolean;
+    useBabel?: boolean;
+    babelCore?: string;
+    babelOptions?: any;
+    usePrecompiledFiles?: boolean;
+    skipDeclarationFilesCheck?: boolean;
+    useCache?: boolean;
+    cacheDirectory?: string;
+    resolveGlobs?: boolean;
+    library: string;
+}
+
+export interface ResolverPlugin {
+    apply(resolver: Resolver): void;
+}
+
+export interface Resolver {
+    apply(plugin: ResolverPlugin): void;
+    plugin(source: string, cb: ResolverCallback): void;
+    doResolve(target: string, req: Request, desc: string, Callback: any): void;
+    join(relativePath: string, innerRequest: Request): Request;
+}
+
+export interface Mapping {
+    onlyModule: boolean;
+    alias: string;
+    aliasPattern: RegExp;
+    target: string;
+}
+
+export function readConfigFile(baseDir: string, query: QueryOptions, tsImpl: typeof ts): Configs {
+    let configFilePath: string;
+    if (query.tsconfig && query.tsconfig.match(/\.json$/)) {
+        configFilePath = query.tsconfig;
+    } else {
+        configFilePath = tsImpl.findConfigFile(process.cwd(), tsImpl.sys.fileExists);
+    }
+
+     let existingOptions = tsImpl.convertCompilerOptionsFromJson(query, process.cwd(), 'atl.query');
+
+    if (!configFilePath) {
+        return {
+            configFilePath: process.cwd(),
+            compilerConfig: tsImpl.parseJsonConfigFileContent(
+                {},
+                tsImpl.sys,
+                process.cwd(),
+                _.extend({}, ts.getDefaultCompilerOptions(), existingOptions.options) as ts.CompilerOptions,
+                process.cwd()
+            ),
+            loaderConfig: query as LoaderConfig
+        };
+    }
+
+    let jsonConfigFile = tsImpl.readConfigFile(configFilePath, tsImpl.sys.readFile);
+
+    let compilerConfig = tsImpl.parseJsonConfigFileContent(
+        jsonConfigFile.config,
+        tsImpl.sys,
+        process.cwd(),
+        existingOptions.options,
+        configFilePath
+    );
+
+    return {
+        configFilePath,
+        compilerConfig,
+        loaderConfig: _.defaults<LoaderConfig, LoaderConfig>(
+            query,
+            jsonConfigFile.config.awesomeTypescriptLoaderOptions)
+    };
+}
+
+
+
+export function setupTs(compiler: string): TSCompilerInfo {
+    let compilerPath = compiler || 'typescript';
+
+    let tsImpl: typeof ts;
+    let tsImplPath: string;
+    try {
+        tsImplPath = require.resolve(compilerPath);
+        tsImpl = require(tsImplPath);
+    } catch (e) {
+        console.error(e);
+        process.exit(1);
+    }
+
+    let compilerInfo: TSCompilerInfo = {
+        compilerPath,
+        tsImpl,
+    };
+
+    return compilerInfo;
+}
+
+
+function escapeRegExp(str: string) {
+  return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+}
+
+export class PathsPlugin implements ResolverPlugin {
+    source: string;
+    target: string;
+    ts: typeof ts;
+    configFilePath: string;
+    options: ts.CompilerOptions;
+
+    baseUrl: string;
+    mappings: Mapping[];
+    absoluteBaseUrl: string;
+
+
+    constructor(config: LoaderConfig & ts.CompilerOptions = {} as any) {
+        this.source = 'described-resolve';
+        this.target = 'resolve';
+
+        this.ts = setupTs(config.compiler).tsImpl;
+
+        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
+        );
+
+        debugger;
+
+        console.log("CONFIG FILE AND BASE URL");
+        console.log(this.configFilePath, this.absoluteBaseUrl);
+
+        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;
+
+        if (baseUrl) {
+            resolver.apply(new ModulesInRootPlugin("module", this.absoluteBaseUrl, "resolve"));
+        }
+
+        mappings.forEach(mapping => {
+            resolver.plugin(this.source, this.createPlugin(resolver, mapping));
+        });
+    }
+
+    createPlugin(resolver: Resolver, mapping: Mapping) {
+        return (request, callback) => {
+            let innerRequest = getInnerRequest(resolver, request);
+            if (!innerRequest) {
+                return callback();
+            }
+
+            let match = innerRequest.match(mapping.aliasPattern);
+            if (!match) {
+                return callback();
+            }
+
+            let newRequestStr = mapping.target;
+            if (!mapping.onlyModule) {
+                newRequestStr = newRequestStr.replace('*', match[1]);
+            }
+
+            if (newRequestStr[0] === '.') {
+                newRequestStr = path.resolve(this.absoluteBaseUrl, newRequestStr);
+            }
+
+            let newRequest: Request = Object.assign({}, request, {
+                request: newRequestStr
+            });
+
+            console.log("aliased'" + innerRequest  + "': '" + mapping.alias + "' to '" + newRequestStr + "'", newRequest);
+
+            let doResolve = 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
+                )
+            );
+
+            return doResolve;
+        };
+    }
+}