Add referenced files to bundle

docs/02-javascript-api.md

@@ -44,9 +44,11 @@ async function build() {
       //   exports: string[],             // exported variable names
       //   facadeModuleId: string | null, // the id of a module that this chunk corresponds to
       //   fileName: string,              // the chunk file name
+      //   implicitlyLoadedBefore: string[]; // entries that should only be loaded after this chunk
       //   imports: string[],             // external modules imported statically by the chunk
       //   isDynamicEntry: boolean,       // is this chunk a dynamic entry point
       //   isEntry: boolean,              // is this chunk a static entry point
+      //   isImplicitEntry: boolean,      // should this chunk only be loaded after other chunks
       //   map: string | null,            // sourcemaps if present
       //   modules: {                     // information about the modules in this chunk
       //     [id: string]: {
@@ -57,6 +59,7 @@ async function build() {
       //     };
       //   },
       //   name: string                   // the name of this chunk as used in naming patterns
+      //   referencedFiles: string[]      // files referenced via import.meta.ROLLUP_FILE_URL_<id>
       //   type: 'chunk',                 // signifies that this is a chunk
       // }
       console.log('Chunk', chunkOrAsset.modules);

docs/05-plugin-development.md

@@ -309,6 +309,7 @@ Called at the end of `bundle.generate()` or immediately before the files are wri
     },
   },
   name: string,
+  referencedFiles: string[],
   type: 'chunk',
 }
 ```

src/Bundle.ts

@@ -82,20 +82,12 @@ export default class Bundle {
 	): Promise<void> {
 		this.assignChunkIds(chunks, inputBase, addons, outputBundle);
 		for (const chunk of chunks) {
-			const chunkDescription = (outputBundle[
-				chunk.id!
-			] = chunk.getChunkInfoWithFileNames() as OutputChunk);
-			chunkDescription.fileName = chunk.id!;
+			outputBundle[chunk.id!] = chunk.getChunkInfoWithFileNames() as OutputChunk;
 		}
 		await Promise.all(
-			chunks.map(chunk => {
+			chunks.map(async chunk => {
 				const outputChunk = outputBundle[chunk.id!] as OutputChunk;
-				return chunk
-					.render(this.outputOptions, addons, outputChunk, this.pluginDriver)
-					.then(rendered => {
-						outputChunk.code = rendered.code;
-						outputChunk.map = rendered.map;
-					});
+				Object.assign(outputChunk, await chunk.render(this.outputOptions, addons, outputChunk));
 			})
 		);
 	}
@@ -146,7 +138,7 @@ export default class Bundle {
 					this.unsetOptions
 				);
 			} else {
-				chunk.id = chunk.generateId(addons, this.outputOptions, bundle, true, this.pluginDriver);
+				chunk.id = chunk.generateId(addons, this.outputOptions, bundle, true);
 			}
 			bundle[chunk.id] = FILE_PLACEHOLDER;
 		}
@@ -206,6 +198,7 @@ export default class Bundle {
 				this.inputOptions,
 				this.outputOptions,
 				this.unsetOptions,
+				this.pluginDriver,
 				this.graph.modulesById,
 				chunkByModule,
 				this.facadeChunkByModule,
@@ -231,7 +224,7 @@ export default class Bundle {
 			chunk.generateExports();
 		}
 		for (const chunk of chunks) {
-			chunk.preRender(this.outputOptions, inputBase, this.pluginDriver);
+			chunk.preRender(this.outputOptions, inputBase);
 		}
 	}
 }

src/Chunk.ts

@@ -118,6 +118,7 @@ export default class Chunk {
 		inputOptions: NormalizedInputOptions,
 		outputOptions: NormalizedOutputOptions,
 		unsetOptions: Set<string>,
+		pluginDriver: PluginDriver,
 		modulesById: Map<string, Module | ExternalModule>,
 		chunkByModule: Map<Module, Chunk>,
 		facadeChunkByModule: Map<Module, Chunk>,
@@ -129,6 +130,7 @@ export default class Chunk {
 			inputOptions,
 			outputOptions,
 			unsetOptions,
+			pluginDriver,
 			modulesById,
 			chunkByModule,
 			facadeChunkByModule,
@@ -197,6 +199,7 @@ export default class Chunk {
 		private readonly inputOptions: NormalizedInputOptions,
 		private readonly outputOptions: NormalizedOutputOptions,
 		private readonly unsetOptions: Set<string>,
+		private readonly pluginDriver: PluginDriver,
 		private readonly modulesById: Map<string, Module | ExternalModule>,
 		private readonly chunkByModule: Map<Module, Chunk>,
 		private readonly facadeChunkByModule: Map<Module, Chunk>,
@@ -342,6 +345,7 @@ export default class Chunk {
 						this.inputOptions,
 						this.outputOptions,
 						this.unsetOptions,
+						this.pluginDriver,
 						this.modulesById,
 						this.chunkByModule,
 						this.facadeChunkByModule,
@@ -376,8 +380,7 @@ export default class Chunk {
 		addons: Addons,
 		options: NormalizedOutputOptions,
 		existingNames: Record<string, any>,
-		includeHash: boolean,
-		outputPluginDriver: PluginDriver
+		includeHash: boolean
 	): string {
 		if (this.fileName !== null) {
 			return this.fileName;
@@ -394,12 +397,7 @@ export default class Chunk {
 					format: () => options.format,
 					hash: () =>
 						includeHash
-							? this.computeContentHashWithDependencies(
-									addons,
-									options,
-									existingNames,
-									outputPluginDriver
-							  )
+							? this.computeContentHashWithDependencies(addons, options, existingNames)
 							: '[hash]',
 					name: () => this.getChunkName()
 				},
@@ -469,7 +467,8 @@ export default class Chunk {
 			fileName: this.id!,
 			implicitlyLoadedBefore: Array.from(this.implicitlyLoadedBefore, getId),
 			imports: Array.from(this.dependencies, getId),
-			map: undefined
+			map: undefined,
+			referencedFiles: this.getReferencedFiles()
 		});
 	}
 
@@ -483,10 +482,10 @@ export default class Chunk {
 		);
 	}
 
-	getRenderedHash(outputPluginDriver: PluginDriver): string {
+	getRenderedHash(): string {
 		if (this.renderedHash) return this.renderedHash;
 		const hash = createHash();
-		const hashAugmentation = outputPluginDriver.hookReduceValueSync(
+		const hashAugmentation = this.pluginDriver.hookReduceValueSync(
 			'augmentChunkHash',
 			'',
 			[this.getChunkInfo()],
@@ -529,7 +528,7 @@ export default class Chunk {
 	}
 
 	// prerender allows chunk hashes and names to be generated before finalizing
-	preRender(options: NormalizedOutputOptions, inputBase: string, outputPluginDriver: PluginDriver) {
+	preRender(options: NormalizedOutputOptions, inputBase: string) {
 		const magicString = new MagicStringBundle({ separator: options.compact ? '' : '\n\n' });
 		this.usedModules = [];
 		this.indentString = getIndentString(this.orderedModules, options);
@@ -545,7 +544,7 @@ export default class Chunk {
 			freeze: options.freeze,
 			indent: this.indentString,
 			namespaceToStringTag: options.namespaceToStringTag,
-			outputPluginDriver,
+			outputPluginDriver: this.pluginDriver,
 			varOrConst: options.preferConst ? 'const' : 'var'
 		};
 
@@ -627,12 +626,7 @@ export default class Chunk {
 			this.exportMode === 'none' ? [] : this.getChunkExportDeclarations(options.format);
 	}
 
-	async render(
-		options: NormalizedOutputOptions,
-		addons: Addons,
-		outputChunk: RenderedChunk,
-		outputPluginDriver: PluginDriver
-	) {
+	async render(options: NormalizedOutputOptions, addons: Addons, outputChunk: RenderedChunk) {
 		timeStart('render format', 2);
 
 		const format = options.format;
@@ -660,7 +654,7 @@ export default class Chunk {
 		}
 
 		this.finaliseDynamicImports(options);
-		this.finaliseImportMetas(format, outputPluginDriver);
+		this.finaliseImportMetas(format);
 
 		const hasExports =
 			this.renderedExports!.length !== 0 ||
@@ -723,7 +717,7 @@ export default class Chunk {
 		let code = await renderChunk({
 			code: prevCode,
 			options,
-			outputPluginDriver,
+			outputPluginDriver: this.pluginDriver,
 			renderChunk: outputChunk,
 			sourcemapChain: chunkSourcemapChain
 		});
@@ -797,8 +791,7 @@ export default class Chunk {
 	private computeContentHashWithDependencies(
 		addons: Addons,
 		options: NormalizedOutputOptions,
-		existingNames: Record<string, any>,
-		outputPluginDriver: PluginDriver
+		existingNames: Record<string, any>
 	): string {
 		const hash = createHash();
 		hash.update(
@@ -810,8 +803,8 @@ export default class Chunk {
 			if (current instanceof ExternalModule) {
 				hash.update(':' + current.renderPath);
 			} else {
-				hash.update(current.getRenderedHash(outputPluginDriver));
-				hash.update(current.generateId(addons, options, existingNames, false, outputPluginDriver));
+				hash.update(current.getRenderedHash());
+				hash.update(current.generateId(addons, options, existingNames, false));
 			}
 			if (current instanceof ExternalModule) continue;
 			for (const dependency of [...current.dependencies, ...current.dynamicDependencies]) {
@@ -874,13 +867,10 @@ export default class Chunk {
 		}
 	}
 
-	private finaliseImportMetas(
-		format: InternalModuleFormat,
-		outputPluginDriver: PluginDriver
-	): void {
+	private finaliseImportMetas(format: InternalModuleFormat): void {
 		for (const [module, code] of this.renderedModuleSources) {
 			for (const importMeta of module.importMetas) {
-				importMeta.renderFinalMechanism(code, this.id!, format, outputPluginDriver);
+				importMeta.renderFinalMechanism(code, this.id!, format, this.pluginDriver);
 			}
 		}
 	}
@@ -1048,6 +1038,19 @@ export default class Chunk {
 		return getAliasName(this.orderedModules[this.orderedModules.length - 1].id);
 	}
 
+	private getReferencedFiles(): string[] {
+		const referencedFiles: string[] = [];
+		for (const module of this.orderedModules) {
+			for (const meta of module.importMetas) {
+				const fileName = meta.getReferencedFileName(this.pluginDriver);
+				if (fileName) {
+					referencedFiles.push(fileName);
+				}
+			}
+		}
+		return referencedFiles;
+	}
+
 	private getRelativePath(targetPath: string, stripJsExtension: boolean): string {
 		let relativePath = normalize(relative(dirname(this.id!), targetPath));
 		if (stripJsExtension && relativePath.endsWith('.js')) {

src/ast/nodes/MetaProperty.ts

@@ -20,6 +20,14 @@ export default class MetaProperty extends NodeBase {
 
 	private metaProperty?: string | null;
 
+	getReferencedFileName(outputPluginDriver: PluginDriver): string | null {
+		const metaProperty = this.metaProperty as string | null;
+		if (metaProperty && metaProperty.startsWith(FILE_PREFIX)) {
+			return outputPluginDriver.getFileName(metaProperty.substr(FILE_PREFIX.length));
+		}
+		return null;
+	}
+
 	hasEffects(): boolean {
 		return false;
 	}
@@ -31,37 +39,33 @@ export default class MetaProperty extends NodeBase {
 	include() {
 		if (!this.included) {
 			this.included = true;
-			const parent = this.parent;
-			const metaProperty = (this.metaProperty =
-				parent instanceof MemberExpression && typeof parent.propertyKey === 'string'
-					? parent.propertyKey
-					: null);
-			if (
-				metaProperty &&
-				(metaProperty.startsWith(FILE_PREFIX) ||
-					metaProperty.startsWith(ASSET_PREFIX) ||
-					metaProperty.startsWith(CHUNK_PREFIX))
-			) {
-				this.scope.addAccessedGlobalsByFormat(accessedFileUrlGlobals);
-			} else {
-				this.scope.addAccessedGlobalsByFormat(accessedMetaUrlGlobals);
+			if (this.meta.name === 'import') {
+				this.context.addImportMeta(this);
+				const parent = this.parent;
+				const metaProperty = (this.metaProperty =
+					parent instanceof MemberExpression && typeof parent.propertyKey === 'string'
+						? parent.propertyKey
+						: null);
+				if (
+					metaProperty &&
+					(metaProperty.startsWith(FILE_PREFIX) ||
+						metaProperty.startsWith(ASSET_PREFIX) ||
+						metaProperty.startsWith(CHUNK_PREFIX))
+				) {
+					this.scope.addAccessedGlobalsByFormat(accessedFileUrlGlobals);
+				} else {
+					this.scope.addAccessedGlobalsByFormat(accessedMetaUrlGlobals);
+				}
 			}
 		}
 	}
 
-	initialise() {
-		if (this.meta.name === 'import') {
-			this.context.addImportMeta(this);
-		}
-	}
-
 	renderFinalMechanism(
 		code: MagicString,
 		chunkId: string,
 		format: InternalModuleFormat,
 		outputPluginDriver: PluginDriver
 	): void {
-		if (!this.included) return;
 		const parent = this.parent;
 		const metaProperty = this.metaProperty as string | null;
 

src/rollup/types.d.ts

@@ -681,6 +681,7 @@ export interface RenderedChunk extends PreRenderedChunk {
 	implicitlyLoadedBefore: string[];
 	imports: string[];
 	map?: SourceMap;
+	referencedFiles: string[];
 }
 
 export interface OutputChunk extends RenderedChunk {

test/function/samples/emit-file/file-references-in-bundle/_config.js

@@ -0,0 +1,39 @@
+const assert = require('assert');
+
+module.exports = {
+	description: 'lists referenced files in the bundle',
+	options: {
+		input: 'main',
+		plugins: {
+			transform() {
+				return `export const asset = import.meta.ROLLUP_FILE_URL_${this.emitFile({
+					type: 'asset',
+					name: 'asset.txt',
+					source: 'asset'
+				})};\nexport const chunk = import.meta.ROLLUP_FILE_URL_${this.emitFile({
+					type: 'chunk',
+					id: 'ref.js'
+				})}`;
+			},
+			generateBundle(options, bundle) {
+				assert.deepStrictEqual(bundle['main.js'].referencedFiles, [
+					'assets/asset.txt',
+					'chunks/ref.js'
+				]);
+			}
+		},
+		output: {
+			assetFileNames: 'assets/[name][extname]',
+			chunkFileNames: 'chunks/[name].js'
+		}
+	},
+	context: {
+		__dirname: 'dir'
+	},
+	exports(exports) {
+		assert.deepStrictEqual(exports, {
+			asset: 'file:///dir/assets/asset.txt',
+			chunk: 'file:///dir/chunks/ref.js'
+		});
+	}
+};

test/function/samples/emit-file/file-references-in-bundle/main.js

@@ -0,0 +1 @@
+throw new Error('not executed');

test/function/samples/emit-file/file-references-in-bundle/ref.js

@@ -0,0 +1 @@
+console.log('Hello');

test/watch/index.js

@@ -1243,7 +1243,7 @@ describe('rollup.watch', () => {
 						'END',
 						() => {
 							assert.strictEqual(run('../_tmp/output/bundle.js'), 42);
-							assert.strictEqual(watchChangeIds.size, 0);
+							assert.deepStrictEqual([...watchChangeIds], []);
 							for (const file of watchFiles) sander.writeFileSync(file, 'changed');
 						},
 						'START',