Function createConvertSourceMapReadMap

packages/vite/src/node/server/sourcemap.ts:223–243

(
  originalFileName: string,
  logger: Logger,
)

}

function createConvertSourceMapReadMap(
  originalFileName: string,
  logger: Logger,
) {
  const packageRoot = getNodeModulesPackageRoot(originalFileName)
  return (filename: string) => {
    const resolvedPath = path.resolve(path.dirname(originalFileName), filename)
    if (
      packageRoot &&
      !isParentDirectory(packageRoot, normalizePath(resolvedPath))
    ) {
      logger.warnOnce(
        colors.yellow(
          `Sourcemap in "${originalFileName}" references a map file outside its package: "${filename}"`,
        ),
      )
      return '{}'
    }
    return fs.readFileSync(resolvedPath, 'utf-8')
  }
}