feat: update to support named render function export

Author: yyx990803

src/index.ts

@@ -76,15 +76,16 @@ const loader: webpack.loader.Loader = function(source: string) {
   const isServer = target === 'node'
   const isProduction = mode === 'production'
 
-  let descriptor
-  try {
-    descriptor = parse(source, {
-      filename: resourcePath,
-      sourceMap
+  const { descriptor, errors } = parse(source, {
+    filename: resourcePath,
+    sourceMap
+  })
+
+  if (errors.length) {
+    errors.forEach(err => {
+      formatError(err, source, resourcePath)
+      loaderContext.emitError(err)
     })
-  } catch (e) {
-    formatError(e, source, resourcePath)
-    loaderContext.emitError(e)
     return ``
   }
 
@@ -125,7 +126,7 @@ const loader: webpack.loader.Loader = function(source: string) {
     const attrsQuery = attrsToQuery(descriptor.template.attrs)
     const query = `?vue&type=template${idQuery}${scopedQuery}${attrsQuery}${resourceQuery}`
     templateRequest = stringifyRequest(src + query)
-    templateImport = `import render from ${templateRequest}`
+    templateImport = `import { render } from ${templateRequest}`
   }
 
   // script

src/pitcher.ts

@@ -83,17 +83,22 @@ pitcher.pitch = function() {
 
   // Rewrite request. Technically this should only be done when we have deduped
   // loaders. But somehow this is required for block source maps to work.
-  return genProxyModule(loaders, context)
+  return genProxyModule(loaders, context, query.type !== 'template')
 }
 
 function genProxyModule(
   loaders: Loader[],
-  context: webpack.loader.LoaderContext
+  context: webpack.loader.LoaderContext,
+  exportDefault = true
 ) {
   const request = genRequest(loaders, context)
   // return a proxy module which simply re-exports everything from the
-  // actual request.
-  return `export { default } from ${request}; export * from ${request}`
+  // actual request. Note for template blocks the compiled module has no
+  // default export.
+  return (
+    (exportDefault ? `export { default } from ${request}; ` : ``) +
+    `export * from ${request}`
+  )
 }
 
 function genRequest(loaders: Loader[], context: webpack.loader.LoaderContext) {