Add inline source-maps so user can get error feedback

Author: tucker87

build/rollup.config-node.mjs

@@ -10,7 +10,7 @@ const __dirname = fileURLToPath(new URL('.', import.meta.url))
 import pkg from '../package.json' assert { type: 'json' };
 
 
-const genSourcemap = false;
+const genSourcemap = "inline";
 
 async function configFactory({ name, vueTarget, libraryTargetModule }) {
 

build/webpack.config.js

@@ -88,7 +88,7 @@ const configure = ({name, vueTarget, libraryTargetModule}) => async (env = {}, {
 		}
 	}));
 
-	const genSourcemap = false;
+	const genSourcemap = "inline";
 
 	let actualTargetsBrowsers = targetsBrowsers;
 

src/createVue2SFCModule.ts

@@ -50,7 +50,7 @@ import { version, vueVersion } from './index'
 // @ts-ignore
 const targetBrowserBabelPluginsHash : string = hash(...Object.keys({ ...(typeof ___targetBrowserBabelPlugins !== 'undefined' ? ___targetBrowserBabelPlugins : {}) }));
 
-const genSourcemap : boolean = !!process.env.GEN_SOURCEMAP;
+const genSourcemap : boolean | "inline" = process.env.GEN_SOURCEMAP;
 
 /**
  * @internal
@@ -88,7 +88,7 @@ export async function createSFCModule(source : string, filename : AbstractPath,
 	const descriptor = sfc_parse({
 		source,
 		filename: strFilename,
-		needMap: genSourcemap,
+		needMap: !!genSourcemap,
 		compiler: vueTemplateCompiler as VueTemplateCompiler}
 		);
 

src/createVue3SFCModule.ts

@@ -44,18 +44,22 @@ type PreprocessLang = SFCAsyncStyleCompileOptions['preprocessLang'];
  * the version of the library
  */
 import { version, vueVersion } from './index'
+import { RawSourceMap } from '@vue/component-compiler-utils/dist/types'
 
 // @ts-ignore
 const targetBrowserBabelPluginsHash : string = hash(...Object.keys({ ...(typeof ___targetBrowserBabelPlugins !== 'undefined' ? ___targetBrowserBabelPlugins : {}) }));
 
-const genSourcemap : boolean = !!process.env.GEN_SOURCEMAP;
+const genSourcemap : boolean | "inline" = process.env.GEN_SOURCEMAP;
 
 /**
  * @internal
  */
 const isProd : boolean = process.env.NODE_ENV === 'production';
 
-
+/**
+ * @internal
+ */
+const buildMapComment = (map : RawSourceMap) => `//# sourceMappingURL=data:application/json;charset=utf-8;base64,${btoa(JSON.stringify(map))}`
 
 /**
  * @internal
@@ -87,7 +91,7 @@ export async function createSFCModule(source : string, filename : AbstractPath,
 	// vue-loader next: https://github.com/vuejs/vue-loader/blob/next/src/index.ts#L91
 	const { descriptor, errors } = sfc_parse(source, {
 		filename: strFilename,
-		sourceMap: genSourcemap,
+		sourceMap: !!genSourcemap,
 	});
 
 
@@ -111,13 +115,14 @@ export async function createSFCModule(source : string, filename : AbstractPath,
 
 	const compileTemplateOptions : SFCTemplateCompileOptions|undefined = descriptor.template ? {
 		// hack, since sourceMap is not configurable an we want to get rid of source-map dependency. see genSourcemap
-		compiler: { ...vue_CompilerDOM, compile: (template, options) => vue_CompilerDOM.compile(template, { ...options, sourceMap: genSourcemap }) },
+		compiler: { ...vue_CompilerDOM, compile: (template, options) => vue_CompilerDOM.compile(template, { ...options, sourceMap: !!genSourcemap }) },
 		source: descriptor.template.src ? (await (await getResource({ refPath: filename, relPath: descriptor.template.src }, options).getContent()).getContentData(false)) as string : descriptor.template.content,
 		filename: descriptor.filename,
 		isProd,
 		scoped: hasScoped,
 		id: scopeId,
 		slotted: descriptor.slotted,
+		inMap: descriptor.template.map,
 		compilerOptions: {
 			isCustomElement,
 			whitespace,
@@ -170,7 +175,7 @@ export async function createSFCModule(source : string, filename : AbstractPath,
 			// src: https://github.com/vuejs/vue-next/blob/15baaf14f025f6b1d46174c9713a2ec517741d0d/packages/compiler-sfc/src/compileScript.ts#L43
 			const scriptBlock = sfc_compileScript(descriptor, {
 				isProd,
-				sourceMap: genSourcemap,
+				sourceMap: !!genSourcemap,
 				id: scopeId,
 				// @ts-ignore (unstable resolution: node_modules/@babel/parser/typings/babel-parser vs node_modules/@types/babel__core/node_modules/@babel/parser/typings/babel-parser)
 				babelParserPlugins: [ ...contextBabelParserPlugins, ...additionalBabelParserPlugins ], //  [...babelParserDefaultPlugins, 'jsx'] + additionalBabelParserPlugins // babelParserDefaultPlugins = [ 'bigInt', 'optionalChaining', 'nullishCoalescingOperator' ]
@@ -180,6 +185,9 @@ export async function createSFCModule(source : string, filename : AbstractPath,
 				templateOptions: compileTemplateOptions,
 			});
 
+			if(scriptBlock.map)
+				scriptBlock.content += `\r\n${buildMapComment(scriptBlock.map)}`
+			
 			// note:
 			//   scriptBlock.content is the script code after vue transformations
 			//   scriptBlock.scriptAst is the script AST before vue transformations
@@ -192,7 +200,7 @@ export async function createSFCModule(source : string, filename : AbstractPath,
 			compileTemplateOptions.compilerOptions.bindingMetadata = bindingMetadata;
 
 		await loadDeps(filename, depsList, options);
-		Object.assign(component, interopRequireDefault(createCJSModule(filename, transformedScriptSource, options).exports).default);
+		Object.assign(component, interopRequireDefault((await createCJSModule(filename, transformedScriptSource, options)).exports).default);
 	}
 
 
@@ -237,11 +245,14 @@ export async function createSFCModule(source : string, filename : AbstractPath,
 			for ( const err of template.tips )
 				log?.('info', 'SFC template', err);
 
+			if(template.map)
+				template.code += `\r\n${buildMapComment(template.map)}`
+
 			return await transformJSCode(template.code, true, descriptor.filename, additionalBabelParserPlugins, additionalBabelPlugins, log, devMode);
 		});
 
 		await loadDeps(filename, templateDepsList, options);
-		Object.assign(component, createCJSModule(filename, templateTransformedSource, options).exports);
+		Object.assign(component, (await createCJSModule(filename, templateTransformedSource, options)).exports);
 	}
 
 

src/tools.ts

@@ -44,7 +44,7 @@ import { createSFCModule } from './createSFCModule'
 /**
  * @internal
  */
-const genSourcemap : boolean = !!process.env.GEN_SOURCEMAP;
+const genSourcemap : boolean | "inline" = process.env.GEN_SOURCEMAP;
 
 const version : string = process.env.VERSION as string;
 
@@ -253,7 +253,7 @@ export async function transformJSCode(source : string, moduleSourceType : boolea
 		comments: devMode,
 		retainLines: devMode,
 		//envName: devMode ? 'development' : 'production', see 'process.env.BABEL_ENV': JSON.stringify(mode),
-
+		filename: filename.toString(),
 		//minified,
 		sourceType: moduleSourceType ? 'module' : 'script',
 	});
@@ -324,7 +324,7 @@ export async function loadModuleInternal(pathCx : PathContext, options : Options
  * Create a cjs module
  * @internal
  */
-export function defaultCreateCJSModule(refPath : AbstractPath, source : string, options : Options) : Module {
+export async function defaultCreateCJSModule(refPath : AbstractPath, source : string, options : Options) : Promise<Module> {
 
 	const { moduleCache, pathResolve, getResource } = options;
 
@@ -348,8 +348,31 @@ export function defaultCreateCJSModule(refPath : AbstractPath, source : string,
 
 	// see https://github.com/nodejs/node/blob/a46b21f556a83e43965897088778ddc7d46019ae/lib/internal/modules/cjs/loader.js#L195-L198
 	// see https://github.com/nodejs/node/blob/a46b21f556a83e43965897088778ddc7d46019ae/lib/internal/modules/cjs/loader.js#L1102
-	const moduleFunction = Function('exports', 'require', 'module', '__filename', '__dirname', '__vsfcl_import__', source);
-	moduleFunction.call(module.exports, module.exports, require, module, refPath, pathResolve({ refPath, relPath: '.' }, options), importFunction);
+	const wrappedSource = `(exports, require, module, __filename, __dirname, __vsfcl_import__) => { ${source} \r\n }`
+
+	let ast = babel_parse(wrappedSource, {
+		sourceType: 'module',
+		sourceFilename: refPath.toString(),
+	});
+
+	const transformedScript = await babel_transformFromAstAsync(ast, wrappedSource, {
+		sourceMaps: "inline",
+		babelrc: false,
+		configFile: false,
+		highlightCode: false,
+		filename: refPath.toString(),
+		sourceType: 'module',
+	});
+
+	if ( transformedScript === null || transformedScript.code == null ) { // == null or undefined
+
+		const msg = `unable to transform script "${refPath.toString()}"`;
+		options.log?.('error', msg);
+		throw new Error(msg)
+	}
+
+
+	eval(transformedScript.code)(module.exports, require, module, refPath, pathResolve({ refPath, relPath: '.' }, options), importFunction)
 
 	return module;
 }
@@ -379,7 +402,7 @@ export async function createJSModule(source : string, moduleSourceType : boolean
 	});
 
 	await loadDeps(filename, depsList, options);
-	return createCJSModule(filename, transformedSource, options).exports;
+	return (await createCJSModule(filename, transformedSource, options)).exports;
 }
 
 

src/types.ts

@@ -377,7 +377,7 @@ export type Options = {
  * creates a CommonJS module from JS source string.
  * *(optional)* 
  */
-	createCJSModule(refPath : AbstractPath, source : string, options : Options) : Module,
+	createCJSModule(refPath : AbstractPath, source : string, options : Options) : Promise<Module>,