$ node
Welcome to Node.js v20.10.0.
Type ".help" for more information.
> const compiler = require("@astrojs/compiler/sync")
undefined
> const result = compiler.transform("hi")
undefined
> result
Promise {
  {
    code: 'import {\n' +
      '  Fragment,\n' +
      '  render as $$render,\n' +
      '  createAstro as $$createAstro,\n' +
      '  createComponent as $$createComponent,\n' +
      '  renderComponent as $$renderComponent,\n' +
      '  renderHead as $$renderHead,\n' +
      '  maybeRenderHead as $$maybeRenderHead,\n' +
      '  unescapeHTML as $$unescapeHTML,\n' +
      '  renderSlot as $$renderSlot,\n' +
      '  mergeSlots as $$mergeSlots,\n' +
      '  addAttribute as $$addAttribute,\n' +
      '  spreadAttributes as $$spreadAttributes,\n' +
      '  defineStyleVars as $$defineStyleVars,\n' +
      '  defineScriptVars as $$defineScriptVars,\n' +
      '  renderTransition as $$renderTransition,\n' +
      '  createTransitionScope as $$createTransitionScope,\n' +
      '  createMetadata as $$createMetadata\n' +
      '} from "astro/runtime/server/index.js";\n' +
      '\n' +
      '\n' +
      'export const $$metadata = $$createMetadata("<stdin>", { modules: [], hydratedComponents: [], clientOnlyComponents: [], hydrationDirectives: new Set([]), hoisted: [] });\n' +
      '\n' +
      'const $$Astro = $$createAstro();\n' +
      'const Astro = $$Astro;\n' +
      'const $$stdin = $$createComponent(async ($$result, $$props, $$slots) => {\n' +
      'const Astro = $$result.createAstro($$Astro, $$props, $$slots);\n' +
      'Astro.self = $$stdin;\n' +
      '\n' +
      'return $$render`hi`;\n' +
      "}, '<stdin>', undefined);\n" +
      'export default $$stdin;\n',
    diagnostics: [],
    map: '',
    scope: '5keef2pk',
    css: [],
    scripts: [],
    hydratedComponents: [],
    clientOnlyComponents: [],
    containsHead: false,
    styleError: [],
    propagation: false
  },
  [Symbol(async_id_symbol)]: 210,
  [Symbol(trigger_async_id_symbol)]: 6
}
> result.code
undefined
> (await result).code
'import {\n' +
  '  Fragment,\n' +
  '  render as $$render,\n' +
  '  createAstro as $$createAstro,\n' +
  '  createComponent as $$createComponent,\n' +
  '  renderComponent as $$renderComponent,\n' +
  '  renderHead as $$renderHead,\n' +
  '  maybeRenderHead as $$maybeRenderHead,\n' +
  '  unescapeHTML as $$unescapeHTML,\n' +
  '  renderSlot as $$renderSlot,\n' +
  '  mergeSlots as $$mergeSlots,\n' +
  '  addAttribute as $$addAttribute,\n' +
  '  spreadAttributes as $$spreadAttributes,\n' +
  '  defineStyleVars as $$defineStyleVars,\n' +
  '  defineScriptVars as $$defineScriptVars,\n' +
  '  renderTransition as $$renderTransition,\n' +
  '  createTransitionScope as $$createTransitionScope,\n' +
  '  createMetadata as $$createMetadata\n' +
  '} from "astro/runtime/server/index.js";\n' +
  '\n' +
  '\n' +
  'export const $$metadata = $$createMetadata("<stdin>", { modules: [], hydratedComponents: [], clientOnlyComponents: [], hydrationDirectives: new Set([]), hoisted: [] });\n' +
  '\n' +
  'const $$Astro = $$createAstro();\n' +
  'const Astro = $$Astro;\n' +
  'const $$stdin = $$createComponent(async ($$result, $$props, $$slots) => {\n' +
  'const Astro = $$result.createAstro($$Astro, $$props, $$slots);\n' +
  'Astro.self = $$stdin;\n' +
  '\n' +
  'return $$render`hi`;\n' +
  "}, '<stdin>', undefined);\n" +
  'export default $$stdin;\n'