[build-utils][ruby] Remove legacy avoidTopLevelInstall logic (#11513)

This logic was left over from a previous iteration of the `vc build`
command which was never shipped. Thus, this logic is no longer
necessary.

.changeset/loud-masks-repeat.md

@@ -0,0 +1,6 @@
+---
+'@vercel/build-utils': major
+'@vercel/ruby': minor
+---
+
+Remove legacy `avoidTopLevelInstall` logic

packages/build-utils/src/types.ts

@@ -66,7 +66,6 @@ export interface Meta {
   filesRemoved?: string[];
   env?: Env;
   buildEnv?: Env;
-  avoidTopLevelInstall?: boolean;
   [key: string]: unknown;
 }
 

packages/ruby/src/index.ts

@@ -1,5 +1,5 @@
 import { EOL } from 'os';
-import { join, dirname, relative } from 'path';
+import { join, dirname } from 'path';
 import execa from 'execa';
 import {
   ensureDir,
@@ -187,24 +187,9 @@ export const build: BuildV3 = async ({
         'did not find a vendor directory but found a Gemfile, bundling gems...'
       );
 
-      const fileAtRoot = relative(workPath, gemfilePath) === gemfileName;
-
-      // If the `Gemfile` is located in the Root Directory of the project and
-      // the new File System API is used (`avoidTopLevelInstall`), the Install Command
-      // will have already installed its dependencies, so we don't need to do it again.
-      if (meta.avoidTopLevelInstall && fileAtRoot) {
-        debug('Skipping `bundle install` — already handled by Install Command');
-      } else {
-        // try installing. this won't work if native extensions are required.
-        // if that's the case, gems should be vendored locally before deploying.
-        await bundleInstall(
-          bundlerPath,
-          bundleDir,
-          gemfilePath,
-          rubyPath,
-          major
-        );
-      }
+      // try installing. this won't work if native extensions are required.
+      // if that's the case, gems should be vendored locally before deploying.
+      await bundleInstall(bundlerPath, bundleDir, gemfilePath, rubyPath, major);
     }
   } else {
     debug('found vendor directory, skipping "bundle install"...');

packages/ruby/src/install-ruby.ts

@@ -108,24 +108,6 @@ export async function installBundler(meta: Meta, gemfileContents: string) {
   const { gemHome, rubyPath, gemPath, vendorPath, runtime, major } =
     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`
-    );
-
-    return {
-      major,
-      gemHome,
-      rubyPath,
-      gemPath,
-      vendorPath,
-      runtime,
-      bundlerPath: join(gemHome, 'bin', 'bundler'),
-    };
-  }
-
   debug('installing bundler...');
   await execa(gemPath, ['install', 'bundler', '--no-document'], {
     stdio: 'pipe',