TypeScript magic-string.Bundle类代码示例

	generate(result: string, options: CompileOptions, { banner = '', sharedPath, helpers, name, format }: GenerateOptions ) {
		const pattern = /\[✂(\d+)-(\d+)$/;

		const module = wrapModule(result, format, name, options, banner, sharedPath, helpers, this.imports, this.source);

		const parts = module.split('✂]');
		const finalChunk = parts.pop();

		const compiled = new Bundle({ separator: '' });

		function addString(str: string) {
			compiled.addSource({
				content: new MagicString(str),
			});
		}

		const { filename } = options;

		// special case — the source file doesn't actually get used anywhere. we need
		// to add an empty file to populate map.sources and map.sourcesContent
		if (!parts.length) {
			compiled.addSource({
				filename,
				content: new MagicString(this.source).remove(0, this.source.length),
			});
		}

		parts.forEach((str: string) => {
			const chunk = str.replace(pattern, '');
			if (chunk) addString(chunk);

			const match = pattern.exec(str);

			const snippet = this.code.snip(+match[1], +match[2]);

			compiled.addSource({
				filename,
				content: snippet,
			});
		});

		addString(finalChunk);

		const { css, cssMap } = this.customElement ?
			{ css: null, cssMap: null } :
			this.stylesheet.render(options.cssOutputFilename, true);

		return {
			ast: this.ast,
			code: compiled.toString(),
			map: compiled.generateMap({
				includeContent: true,
				file: options.outputFilename,
			}),
			css,
			cssMap
		};
	}

export default function getIndentString (magicString: MagicStringBundle, options: { indent?: boolean }) {
	if (options.indent === true) {
		return magicString.getIndentString();
	}

	return options.indent || '';
}

export default function system(
	magicString: MagicStringBundle,
	{
		dependencies,
		exports,
		indentString: t,
		intro,
		outro,
		usesTopLevelAwait,
		varOrConst
	}: FinaliserOptions,
	options: OutputOptions
) {
	const n = options.compact ? '' : '\n';
	const _ = options.compact ? '' : ' ';

	const dependencyIds = dependencies.map(m => `'${m.id}'`);

	const importBindings: string[] = [];
	let starExcludes: Set<string>;
	const setters: string[] = [];

	dependencies.forEach(({ imports, reexports }) => {
		const setter: string[] = [];
		if (imports) {
			imports.forEach(specifier => {
				importBindings.push(specifier.local);
				if (specifier.imported === '*') {
					setter.push(`${specifier.local}${_}=${_}module;`);
				} else {
					setter.push(`${specifier.local}${_}=${_}module.${specifier.imported};`);
				}
			});
		}
		if (reexports) {
			let createdSetter = false;
			// bulk-reexport form
			if (
				reexports.length > 1 ||
				(reexports.length === 1 &&
					(reexports[0].reexported === '*' || reexports[0].imported === '*'))
			) {
				// star reexports
				reexports.forEach(specifier => {
					if (specifier.reexported !== '*') return;
					// need own exports list for deduping in star export case
					if (!starExcludes) {
						starExcludes = getStarExcludes({ dependencies, exports });
					}
					if (!createdSetter) {
						setter.push(`${varOrConst} _setter${_}=${_}{};`);
						createdSetter = true;
					}
					setter.push(`for${_}(var _$p${_}in${_}module)${_}{`);
					setter.push(`${t}if${_}(!_starExcludes[_$p])${_}_setter[_$p]${_}=${_}module[_$p];`);
					setter.push('}');
				});
				// star import reexport
				reexports.forEach(specifier => {
					if (specifier.imported !== '*' || specifier.reexported === '*') return;
					setter.push(`exports('${specifier.reexported}',${_}module);`);
				});
				// reexports
				reexports.forEach(specifier => {
					if (specifier.reexported === '*' || specifier.imported === '*') return;
					if (!createdSetter) {
						setter.push(`${varOrConst} _setter${_}=${_}{};`);
						createdSetter = true;
					}
					setter.push(`_setter.${specifier.reexported}${_}=${_}module.${specifier.imported};`);
				});
				if (createdSetter) {
					setter.push('exports(_setter);');
				}
			} else {
				// single reexport
				reexports.forEach(specifier => {
					setter.push(`exports('${specifier.reexported}',${_}module.${specifier.imported});`);
				});
			}
		}
		setters.push(setter.join(`${n}${t}${t}${t}`));
	});

	const registeredName = options.name ? `'${options.name}',${_}` : '';

	let wrapperStart =
		`System.register(${registeredName}[` +
		dependencyIds.join(`,${_}`) +
		`],${_}function${_}(exports,${_}module)${_}{${n}${t}'use strict';` +
		getStarExcludesBlock(starExcludes, varOrConst, _, t, n) +
		getImportBindingsBlock(importBindings, _, t, n) +
		`${n}${t}return${_}{${
			setters.length
				? `${n}${t}${t}setters:${_}[${setters
						.map(s =>
							s
								? `function${_}(module)${_}{${n}${t}${t}${t}${s}${n}${t}${t}}`
								: `function${_}()${_}{}`
						)
//.........这里部分代码省略.........

export default function iife(
	magicString: MagicStringBundle,
	{
		graph,
		namedExportsMode,
		hasExports,
		indentString: t,
		intro,
		outro,
		dependencies,
		exports
	}: FinaliserOptions,
	options: OutputOptions
) {
	const _ = options.compact ? '' : ' ';
	const n = options.compact ? '' : '\n';

	const { extend, name } = options;
	const isNamespaced = name && name.indexOf('.') !== -1;
	const possibleVariableAssignment = !extend && !isNamespaced;

	if (name && possibleVariableAssignment && !isLegal(name)) {
		error({
			code: 'ILLEGAL_IDENTIFIER_AS_NAME',
			message: `Given name (${name}) is not legal JS identifier. If you need this you can try --extend option`
		});
	}

	warnOnBuiltins(graph, dependencies);

	const external = trimEmptyImports(dependencies);
	const deps = external.map(dep => dep.globalName || 'null');
	const args = external.map(m => m.name);

	if (hasExports && !name) {
		error({
			code: 'INVALID_OPTION',
			message: `You must supply output.name for IIFE bundles`
		});
	}

	if (extend) {
		deps.unshift(`(${thisProp(name)}${_}=${_}${thisProp(name)}${_}||${_}{})`);
		args.unshift('exports');
	} else if (namedExportsMode && hasExports) {
		deps.unshift('{}');
		args.unshift('exports');
	}

	const useStrict = options.strict !== false ? `${t}'use strict';${n}${n}` : ``;

	let wrapperIntro = `(function${_}(${args})${_}{${n}${useStrict}`;

	if (hasExports && !extend) {
		wrapperIntro =
			(isNamespaced ? thisProp(name) : `${graph.varOrConst} ${name}`) + `${_}=${_}${wrapperIntro}`;
	}

	if (isNamespaced) {
		wrapperIntro =
			setupNamespace(name, 'this', false, options.globals, options.compact) + wrapperIntro;
	}

	let wrapperOutro = `${n}${n}}(${deps}));`;

	if (!extend && namedExportsMode && hasExports) {
		wrapperOutro = `${n}${n}${t}return exports;${wrapperOutro}`;
	}

	// var foo__default = 'default' in foo ? foo['default'] : foo;
	const interopBlock = getInteropBlock(dependencies, options, graph.varOrConst);
	if (interopBlock) magicString.prepend(interopBlock + n + n);

	if (intro) magicString.prepend(intro);

	const exportBlock = getExportBlock(
		exports,
		dependencies,
		namedExportsMode,
		options.interop,
		options.compact
	);
	if (exportBlock) magicString.append(n + n + exportBlock);
	if (outro) magicString.append(outro);

	return magicString
		.indent(t)
		.prepend(wrapperIntro)
		.append(wrapperOutro);
}

export default function system(
	magicString: MagicStringBundle,
	{
		graph,
		indentString: t,
		intro,
		outro,
		dependencies,
		exports,
		usesTopLevelAwait
	}: FinaliserOptions,
	options: OutputOptions
) {
	const n = options.compact ? '' : '\n';
	const _ = options.compact ? '' : ' ';

	const dependencyIds = dependencies.map(m => `'${m.id}'`);

	const importBindings: string[] = [];
	let starExcludes: Set<string>;
	const setters: string[] = [];
	const varOrConst = graph.varOrConst;

	dependencies.forEach(({ imports, reexports }) => {
		const setter: string[] = [];
		if (imports) {
			imports.forEach(specifier => {
				importBindings.push(specifier.local);
				if (specifier.imported === '*') {
					setter.push(`${specifier.local}${_}=${_}module;`);
				} else {
					setter.push(`${specifier.local}${_}=${_}module.${specifier.imported};`);
				}
			});
		}
		if (reexports) {
			let createdSetter = false;
			// bulk-reexport form
			if (
				reexports.length > 1 ||
				(reexports.length === 1 &&
					(reexports[0].reexported === '*' || reexports[0].imported === '*'))
			) {
				// star reexports
				reexports.forEach(specifier => {
					if (specifier.reexported !== '*') return;
					// need own exports list for deduping in star export case
					if (!starExcludes) {
						starExcludes = getStarExcludes({ dependencies, exports });
					}
					if (!createdSetter) {
						setter.push(`${varOrConst} _setter${_}=${_}{};`);
						createdSetter = true;
					}
					setter.push(`for${_}(var _$p${_}in${_}module)${_}{`);
					setter.push(`${t}if${_}(!_starExcludes[_$p])${_}_setter[_$p]${_}=${_}module[_$p];`);
					setter.push('}');
				});
				// star import reexport
				reexports.forEach(specifier => {
					if (specifier.imported !== '*' || specifier.reexported === '*') return;
					setter.push(`exports('${specifier.reexported}',${_}module);`);
				});
				// reexports
				reexports.forEach(specifier => {
					if (specifier.reexported === '*' || specifier.imported === '*') return;
					if (!createdSetter) {
						setter.push(`${varOrConst} _setter${_}=${_}{};`);
						createdSetter = true;
					}
					setter.push(`_setter.${specifier.reexported}${_}=${_}module.${specifier.imported};`);
				});
				if (createdSetter) {
					setter.push('exports(_setter);');
				}
			} else {
				// single reexport
				reexports.forEach(specifier => {
					setter.push(`exports('${specifier.reexported}',${_}module.${specifier.imported});`);
				});
			}
		}
		setters.push(setter.join(`${n}${t}${t}${t}`));
	});

	// function declarations hoist
	const hoistedExports: string[] = [];

	const hoistedExportObjs = exports.filter(expt => expt.hoisted || expt.uninitialized);
	if (hoistedExportObjs.length === 1) {
		const expt = hoistedExportObjs[0];
		hoistedExports.push(
			`exports('${expt.exported}',${_}${expt.uninitialized ? 'void 0' : expt.local});`
		);
	} else if (hoistedExportObjs.length > 1) {
		hoistedExports.push(`exports({`);
		for (let i = 0; i < hoistedExportObjs.length; i++) {
			const expt = hoistedExportObjs[i];
			hoistedExports.push(
				`${t}${expt.exported}:${_}${expt.uninitialized ? 'void 0' : expt.local}${
//.........这里部分代码省略.........

export default function umd(
	magicString: MagicStringBundle,
	{
		dependencies,
		exports,
		hasExports,
		indentString: t,
		intro,
		namedExportsMode,
		outro,
		varOrConst,
		warn
	}: FinaliserOptions,
	options: OutputOptions
) {
	const _ = options.compact ? '' : ' ';
	const n = options.compact ? '' : '\n';
	const factoryVar = options.compact ? 'f' : 'factory';
	const globalVar = options.compact ? 'g' : 'global';

	if (hasExports && !options.name) {
		error({
			code: 'INVALID_OPTION',
			message: 'You must supply "output.name" for UMD bundles.'
		});
	}

	warnOnBuiltins(warn, dependencies);

	const amdDeps = dependencies.map(m => `'${m.id}'`);
	const cjsDeps = dependencies.map(m => `require('${m.id}')`);

	const trimmedImports = trimEmptyImports(dependencies);
	const globalDeps = trimmedImports.map(module => globalProp(module.globalName, globalVar));
	const factoryArgs = trimmedImports.map(m => m.name);

	if (namedExportsMode && (hasExports || options.noConflict === true)) {
		amdDeps.unshift(`'exports'`);
		cjsDeps.unshift(`exports`);
		globalDeps.unshift(
			assignToDeepVariable(
				options.name,
				globalVar,
				options.globals,
				options.compact,
				`${options.extend ? `${globalProp(options.name, globalVar)}${_}||${_}` : ''}{}`
			)
		);

		factoryArgs.unshift('exports');
	}

	const amdOptions = options.amd || {};

	const amdParams =
		(amdOptions.id ? `'${amdOptions.id}',${_}` : ``) +
		(amdDeps.length ? `[${amdDeps.join(`,${_}`)}],${_}` : ``);

	const define = amdOptions.define || 'define';
	const cjsExport = !namedExportsMode && hasExports ? `module.exports${_}=${_}` : ``;
	const useStrict = options.strict !== false ? `${_}'use strict';${n}` : ``;

	let iifeExport;

	if (options.noConflict === true) {
		const noConflictExportsVar = options.compact ? 'e' : 'exports';
		let factory;

		if (!namedExportsMode && hasExports) {
			factory = `var ${noConflictExportsVar}${_}=${_}${assignToDeepVariable(
				options.name,
				globalVar,
				options.globals,
				options.compact,
				`${factoryVar}(${globalDeps.join(`,${_}`)})`
			)};`;
		} else if (namedExportsMode) {
			const module = globalDeps.shift();
			factory =
				`var ${noConflictExportsVar}${_}=${_}${module};${n}` +
				`${t}${t}${factoryVar}(${[noConflictExportsVar].concat(globalDeps).join(`,${_}`)});`;
		}
		iifeExport =
			`(function${_}()${_}{${n}` +
			`${t}${t}var current${_}=${_}${safeAccess(options.name, globalVar, _)};${n}` +
			`${t}${t}${factory}${n}` +
			`${t}${t}${noConflictExportsVar}.noConflict${_}=${_}function${_}()${_}{${_}` +
			`${globalProp(options.name, globalVar)}${_}=${_}current;${_}return ${noConflictExportsVar}${
				options.compact ? '' : '; '
			}};${n}` +
			`${t}}())`;
	} else {
		iifeExport = `${factoryVar}(${globalDeps.join(`,${_}`)})`;
		if (!namedExportsMode && hasExports) {
			iifeExport = assignToDeepVariable(
				options.name,
				globalVar,
				options.globals,
				options.compact,
				iifeExport
//.........这里部分代码省略.........

export default function amd(
	magicString: MagicStringBundle,
	{
		graph,
		namedExportsMode,
		hasExports,
		indentString,
		intro,
		outro,
		dynamicImport,
		needsAmdModule,
		dependencies,
		exports,
		isEntryModuleFacade
	}: FinaliserOptions,
	options: OutputOptions
) {
	warnOnBuiltins(graph, dependencies);

	const deps = dependencies.map(m => `'${m.id}'`);
	const args = dependencies.map(m => m.name);
	const n = options.compact ? '' : '\n';
	const _ = options.compact ? '' : ' ';

	if (namedExportsMode && hasExports) {
		args.unshift(`exports`);
		deps.unshift(`'exports'`);
	}

	if (dynamicImport) {
		args.unshift('require');
		deps.unshift(`'require'`);
	}

	if (needsAmdModule) {
		args.unshift('module');
		deps.unshift(`'module'`);
	}

	const amdOptions = options.amd || {};

	const params =
		(amdOptions.id ? `'${amdOptions.id}',${_}` : ``) +
		(deps.length ? `[${deps.join(`,${_}`)}],${_}` : ``);

	const useStrict = options.strict !== false ? `${_}'use strict';` : ``;
	const define = amdOptions.define || 'define';
	const wrapperStart = `${define}(${params}function${_}(${args.join(
		`,${_}`
	)})${_}{${useStrict}${n}${n}`;

	// var foo__default = 'default' in foo ? foo['default'] : foo;
	const interopBlock = getInteropBlock(dependencies, options, graph.varOrConst);
	if (interopBlock) magicString.prepend(interopBlock + n + n);

	if (intro) magicString.prepend(intro);

	const exportBlock = getExportBlock(
		exports,
		dependencies,
		namedExportsMode,
		options.interop,
		options.compact
	);
	if (exportBlock) magicString.append(n + n + exportBlock);
	if (namedExportsMode && hasExports && isEntryModuleFacade && options.esModule)
		magicString.append(`${n}${n}${options.compact ? compactEsModuleExport : esModuleExport}`);
	if (outro) magicString.append(outro);

	return magicString
		.indent(indentString)
		.append(n + n + '});')
		.prepend(wrapperStart);
}

export default function cjs(
	magicString: MagicStringBundle,
	{
		dependencies,
		exports,
		hasExports,
		indentString: t,
		intro,
		isEntryModuleFacade,
		namedExportsMode,
		outro,
		varOrConst
	}: FinaliserOptions,
	options: OutputOptions
) {
	const n = options.compact ? '' : '\n';
	const _ = options.compact ? '' : ' ';

	intro =
		(options.strict === false ? intro : `'use strict';${n}${n}${intro}`) +
		(namedExportsMode && hasExports && isEntryModuleFacade && options.esModule
			? `${options.compact ? compactEsModuleExport : esModuleExport}${n}${n}`
			: '');

	let needsInterop = false;
	const interop = options.interop !== false;
	let importBlock: string;

	let definingVariable = false;
	importBlock = '';
	for (const {
		id,
		namedExportsMode,
		isChunk,
		name,
		reexports,
		imports,
		exportsNames,
		exportsDefault
	} of dependencies) {
		if (!reexports && !imports) {
			if (importBlock) {
				importBlock += !options.compact || definingVariable ? `;${n}` : ',';
			}
			definingVariable = false;
			importBlock += `require('${id}')`;
		} else {
			importBlock +=
				options.compact && definingVariable ? ',' : `${importBlock ? `;${n}` : ''}${varOrConst} `;
			definingVariable = true;

			if (!interop || isChunk || !exportsDefault || !namedExportsMode) {
				importBlock += `${name}${_}=${_}require('${id}')`;
			} else {
				needsInterop = true;
				if (exportsNames)
					importBlock += `${name}${_}=${_}require('${id}')${
						options.compact ? ',' : `;\n${varOrConst} `
					}${name}__default${_}=${_}${INTEROP_DEFAULT_VARIABLE}(${name})`;
				else importBlock += `${name}${_}=${_}${INTEROP_DEFAULT_VARIABLE}(require('${id}'))`;
			}
		}
	}
	if (importBlock) importBlock += ';';

	if (needsInterop) {
		const ex = options.compact ? 'e' : 'ex';
		intro +=
			`function ${INTEROP_DEFAULT_VARIABLE}${_}(${ex})${_}{${_}return${_}` +
			`(${ex}${_}&&${_}(typeof ${ex}${_}===${_}'object')${_}&&${_}'default'${_}in ${ex})${_}` +
			`?${_}${ex}['default']${_}:${_}${ex}${options.compact ? '' : '; '}}${n}${n}`;
	}

	if (importBlock) intro += importBlock + n + n;

	const exportBlock = getExportBlock(
		exports,
		dependencies,
		namedExportsMode,
		options.interop,
		options.compact,
		t,
		`module.exports${_}=${_}`
	);

	magicString.prepend(intro);

	if (exportBlock) magicString.append(n + n + exportBlock);
	if (outro) magicString.append(outro);

	return magicString;
}

		parts.forEach((str: string) => {
			const chunk = str.replace(pattern, '');
			if (chunk) addString(chunk);

			const match = pattern.exec(str);

			const snippet = this.code.snip(+match[1], +match[2]);

			compiled.addSource({
				filename,
				content: snippet,
			});
		});

		function addString(str: string) {
			compiled.addSource({
				content: new MagicString(str),
			});
		}