[now dev] Add support for handle: miss and handle: hit (#3537)

- [x] Add tests from now-proxy for `handle: miss`
- [x] Add tests from now-proxy for `handle: hit`
- [x] Add file output renaming when `featHandleMiss` is true (also assign true for now dev)

packages/now-cli/src/util/dev/static-builder.ts

@@ -3,11 +3,22 @@ import { BuilderParams, BuildResult, ShouldServeParams } from './types';
 
 export const version = 2;
 
-export function build({ files, entrypoint }: BuilderParams): BuildResult {
+export function build({
+  files,
+  entrypoint,
+  config,
+}: BuilderParams): BuildResult {
+  let path = entrypoint;
+  const outputDir = config.zeroConfig ? config.outputDirectory : '';
+  const outputMatch = outputDir + '/';
+  if (outputDir && path.startsWith(outputMatch)) {
+    // static output files are moved to the root directory
+    path = path.slice(outputMatch.length);
+  }
   const output = {
-    [entrypoint]: files[entrypoint],
+    [path]: files[entrypoint],
   };
-  const watch = [entrypoint];
+  const watch = [path];
 
   return { output, routes: [], watch };
 }
@@ -16,14 +27,25 @@ export function shouldServe({
   entrypoint,
   files,
   requestPath,
+  config = {},
 }: ShouldServeParams) {
+  let outputPrefix = '';
+  const outputDir = config.zeroConfig ? config.outputDirectory : '';
+  const outputMatch = outputDir + '/';
+  if (outputDir && entrypoint.startsWith(outputMatch)) {
+    // static output files are moved to the root directory
+    entrypoint = entrypoint.slice(outputMatch.length);
+    outputPrefix = outputMatch;
+  }
+  const isMatch = (f: string) => entrypoint === f && outputPrefix + f in files;
+
   if (isIndex(entrypoint)) {
     const indexPath = join(requestPath, basename(entrypoint));
-    if (entrypoint === indexPath && indexPath in files) {
+    if (isMatch(indexPath)) {
       return true;
     }
   }
-  return entrypoint === requestPath && requestPath in files;
+  return isMatch(requestPath);
 }
 
 function isIndex(path: string): boolean {