babel-plugin-reexport-named-as-default

babel-plugin-reexport-named-as-default.js

// This file totally hacked together from https://github.com/jfeldstein/babel-plugin-export-default-module-exports
module.exports = ({types : t}) => ({
  visitor: {
    Program: {
      exit (path) {
        if (path.BABEL_PLUGIN_EXPORT_DEFAULT_MODULE_EXPORTS) {
          return
        }

        let hasExportDefault = false
        let hasExportNamed = false

        let namedExports = []

        path.get('body').forEach((path) => {
          if (path.isExportDefaultDeclaration()) {
            hasExportDefault = true
            return
          }

          if (path.isExportNamedDeclaration()) {
            if (path.node.specifiers.length === 1 && path.node.specifiers[0].exported.name === 'default') {
              hasExportDefault = true
            } else {
              hasExportNamed = true
              const {declarations} = path.node.declaration
              const [firstDeclaration = {}] = declarations

              namedExports.push(firstDeclaration.id.name)
            }
            return
          }
        })

        if (!hasExportDefault && hasExportNamed) {


          const objectProperties = namedExports.map (name => t.objectProperty(
            t.identifier(name),
            t.identifier(name),
            false, true
          ))

          const objDeclaration = t.variableDeclaration("const",
            [t.variableDeclarator(
              t.identifier("namedExports"),
              t.objectExpression(objectProperties)
            )]
          )

          const exportDefaultDeclaration = t.exportDefaultDeclaration(
            t.identifier("namedExports")
          )

          path.pushContainer("body", [
            objDeclaration,
            exportDefaultDeclaration
          ])
        }

        path.BABEL_PLUGIN_EXPORT_DEFAULT_MODULE_EXPORTS = true
      }
    }
  }
})