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77 lines
2.9 KiB
JavaScript
77 lines
2.9 KiB
JavaScript
const {transform} = require("../dist");
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// Enum constants taken from the TypeScript codebase.
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const ModuleKindCommonJS = 1;
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const JsxEmitReactJSX = 4;
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const JsxEmitReactJSXDev = 5;
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/**
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* ts-node transpiler plugin
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*
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* This plugin hooks into ts-node so that Sucrase can handle all TS-to-JS
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* conversion while ts-node handles the ESM loader, require hook, REPL
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* integration, etc. ts-node automatically discovers the relevant tsconfig file,
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* so the main logic in this integration is translating tsconfig options to the
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* corresponding Sucrase options.
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*
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* Any tsconfig options relevant to Sucrase are translated, but some config
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* options outside the scope of Sucrase are ignored. For example, we assume the
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* isolatedModules option, and we ignore target because Sucrase doesn't provide
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* JS syntax downleveling (at least not in a way that is useful for Node).
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*
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* One notable caveat is that importsNotUsedAsValues and preserveValueImports
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* are ignored right now, and Sucrase uses TypeScript's default behavior of
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* eliding imports only used as types. This usually makes no difference when
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* running the code, so for now we ignore these options without a warning.
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*/
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function create(createOptions) {
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const {nodeModuleEmitKind} = createOptions;
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const {module, jsx, jsxFactory, jsxFragmentFactory, jsxImportSource, esModuleInterop} =
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createOptions.service.config.options;
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return {
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transpile(input, transpileOptions) {
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const {fileName} = transpileOptions;
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const transforms = [];
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// Detect JS rather than TS so we bias toward including the typescript
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// transform, since almost always it doesn't hurt to include.
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const isJS =
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fileName.endsWith(".js") ||
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fileName.endsWith(".jsx") ||
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fileName.endsWith(".mjs") ||
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fileName.endsWith(".cjs");
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if (!isJS) {
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transforms.push("typescript");
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}
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if (module === ModuleKindCommonJS || nodeModuleEmitKind === "nodecjs") {
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transforms.push("imports");
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}
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if (fileName.endsWith(".tsx") || fileName.endsWith(".jsx")) {
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transforms.push("jsx");
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}
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const {code, sourceMap} = transform(input, {
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transforms,
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disableESTransforms: true,
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jsxRuntime: jsx === JsxEmitReactJSX || jsx === JsxEmitReactJSXDev ? "automatic" : "classic",
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production: jsx === JsxEmitReactJSX,
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jsxImportSource,
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jsxPragma: jsxFactory,
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jsxFragmentPragma: jsxFragmentFactory,
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preserveDynamicImport: nodeModuleEmitKind === "nodecjs",
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injectCreateRequireForImportRequire: nodeModuleEmitKind === "nodeesm",
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enableLegacyTypeScriptModuleInterop: !esModuleInterop,
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sourceMapOptions: {compiledFilename: fileName},
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filePath: fileName,
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});
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return {
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outputText: code,
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sourceMapText: JSON.stringify(sourceMap),
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};
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},
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};
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}
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exports.create = create;
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