Corrected dependency installation systems (#7088)

* Avoid unnecessary Gemfile installations

* Do not bundle `.output` or `.vercel` into Lambdas

* Use the same input hash format for all CLI Plugins and `vercel build`

* Fixed unit tests

* Fixed the unit tests again

* Fixed the unit tests

* Fixed all the tests

* Exclude useless files

* Consider `.vercelignore` and `.nowignore`

* Fixed error

* Reverted changes

* Deleted useless file

* Fixed tests

* Share input hash format with `vercel-plugin-node`

* Make output inspectable

* Fixed build error

* Extended comment

* Bump Ruby version

* Update Gemfiles

* Update bundles

* Fixed tests

Co-authored-by: Andy Bitz <artzbitz@gmail.com>

packages/ruby/install-ruby.ts

@@ -61,18 +61,27 @@ function getRubyPath(meta: Meta, gemfileContents: string) {
 // process.env.GEM_HOME), and returns
 // the absolute path to it
 export async function installBundler(meta: Meta, gemfileContents: string) {
+  const { gemHome, rubyPath, gemPath, vendorPath, runtime } = getRubyPath(
+    meta,
+    gemfileContents
+  );
+
   // If the new File System API is used (`avoidTopLevelInstall`), the Install Command
   // will have already installed the dependencies, so we don't need to do it again.
   if (meta.avoidTopLevelInstall) {
     debug(
       `Skipping bundler installation, already installed by Install Command`
     );
-  }
 
-  const { gemHome, rubyPath, gemPath, vendorPath, runtime } = getRubyPath(
-    meta,
-    gemfileContents
-  );
+    return {
+      gemHome,
+      rubyPath,
+      gemPath,
+      vendorPath,
+      runtime,
+      bundlerPath: join(gemHome, 'bin', 'bundler'),
+    };
+  }
 
   debug('installing bundler...');
   await execa(gemPath, ['install', 'bundler', '--no-document'], {