Function rewriteEsmImports

packages/unpkg-files/src/lib/esm-build-service.ts:312–352

(
  code: string,
  registry: string,
  origin: string,
  dependencies: Record<string, string>,
  options: NormalizedBuildOptions
)

}

export async function rewriteEsmImports(
  code: string,
  registry: string,
  origin: string,
  dependencies: Record<string, string>,
  options: NormalizedBuildOptions
): Promise<string> {
  let [imports] = parse(code);
  let rewrites: { start: number; end: number; value: string }[] = [];

  for (let imp of imports) {
    if (imp.n === undefined) {
      continue;
    }

    let specifier = code.slice(imp.s, imp.e);
    let rewriteValue: string;

    if (imp.t === 2) {
      let match = /^(["'])([^"']*)\1$/.exec(specifier);
      if (match === null) continue;

      rewriteValue = match[1] + await rewriteEsmSpecifier(match[2], registry, origin, dependencies, options) + match[1];
    } else {
      rewriteValue = await rewriteEsmSpecifier(specifier, registry, origin, dependencies, options);
    }

    if (rewriteValue !== specifier) {
      rewrites.push({ start: imp.s, end: imp.e, value: rewriteValue });
    }
  }

  rewrites.sort((a, b) => b.start - a.start);

  let result = code;
  for (let { start, end, value } of rewrites) {
    result = result.slice(0, start) + value + result.slice(end);
  }

  return result;
}

export async function bundleSource(
  packageDirectory: string,