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import CJSImportProcessor from "./CJSImportProcessor"; import computeSourceMap, {} from "./computeSourceMap"; import {HelperManager} from "./HelperManager"; import identifyShadowedGlobals from "./identifyShadowedGlobals"; import NameManager from "./NameManager"; import {validateOptions} from "./Options"; import {parse} from "./parser"; import TokenProcessor from "./TokenProcessor"; import RootTransformer from "./transformers/RootTransformer"; import formatTokens from "./util/formatTokens"; import getTSImportedNames from "./util/getTSImportedNames"; ; export function getVersion() { /* istanbul ignore next */ return "3.34.0"; } export function transform(code, options) { validateOptions(options); try { const sucraseContext = getSucraseContext(code, options); const transformer = new RootTransformer( sucraseContext, options.transforms, Boolean(options.enableLegacyBabel5ModuleInterop), options, ); const transformerResult = transformer.transform(); let result = {code: transformerResult.code}; if (options.sourceMapOptions) { if (!options.filePath) { throw new Error("filePath must be specified when generating a source map."); } result = { ...result, sourceMap: computeSourceMap( transformerResult, options.filePath, options.sourceMapOptions, code, sucraseContext.tokenProcessor.tokens, ), }; } return result; // eslint-disable-next-line @typescript-eslint/no-explicit-any } catch (e) { if (options.filePath) { e.message = `Error transforming ${options.filePath}: ${e.message}`; } throw e; } } /** * Return a string representation of the sucrase tokens, mostly useful for * diagnostic purposes. */ export function getFormattedTokens(code, options) { const tokens = getSucraseContext(code, options).tokenProcessor.tokens; return formatTokens(code, tokens); } /** * Call into the parser/tokenizer and do some further preprocessing: * - Come up with a set of used names so that we can assign new names. * - Preprocess all import/export statements so we know which globals we are interested in. * - Compute situations where any of those globals are shadowed. * * In the future, some of these preprocessing steps can be skipped based on what actual work is * being done. */ function getSucraseContext(code, options) { const isJSXEnabled = options.transforms.includes("jsx"); const isTypeScriptEnabled = options.transforms.includes("typescript"); const isFlowEnabled = options.transforms.includes("flow"); const disableESTransforms = options.disableESTransforms === true; const file = parse(code, isJSXEnabled, isTypeScriptEnabled, isFlowEnabled); const tokens = file.tokens; const scopes = file.scopes; const nameManager = new NameManager(code, tokens); const helperManager = new HelperManager(nameManager); const tokenProcessor = new TokenProcessor( code, tokens, isFlowEnabled, disableESTransforms, helperManager, ); const enableLegacyTypeScriptModuleInterop = Boolean(options.enableLegacyTypeScriptModuleInterop); let importProcessor = null; if (options.transforms.includes("imports")) { importProcessor = new CJSImportProcessor( nameManager, tokenProcessor, enableLegacyTypeScriptModuleInterop, options, options.transforms.includes("typescript"), Boolean(options.keepUnusedImports), helperManager, ); importProcessor.preprocessTokens(); // We need to mark shadowed globals after processing imports so we know that the globals are, // but before type-only import pruning, since that relies on shadowing information. identifyShadowedGlobals(tokenProcessor, scopes, importProcessor.getGlobalNames()); if (options.transforms.includes("typescript") && !options.keepUnusedImports) { importProcessor.pruneTypeOnlyImports(); } } else if (options.transforms.includes("typescript") && !options.keepUnusedImports) { // Shadowed global detection is needed for TS implicit elision of imported names. identifyShadowedGlobals(tokenProcessor, scopes, getTSImportedNames(tokenProcessor)); } return {tokenProcessor, scopes, nameManager, importProcessor, helperManager}; }
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