Exclude certain Bundler settings when composing bundle (#3277)

### Motivation

Closes #2440, closes #3196

Certain Bundler settings are better used only when the user is in control, like deciding when to package gems or if Bundler should automatically install binstubs for all gems.

This PR starts ignoring certain settings from the composed environment.

### Implementation

Added a list of ignored settings that we reject before building the environment that we'll use to run bundle install/update.

### Automated Tests

Added tests for both bundle bin and bundle package related settings.

Author: vinistock

lib/ruby_lsp/setup_bundler.rb

@@ -357,10 +357,17 @@ def bundler_settings_as_env
         Bundler::Settings.new
       end
 
+      # List of Bundler settings that don't make sense for the composed bundle and are better controlled manually by the
+      # user
+      ignored_settings = ["bin", "cache_all", "cache_all_platforms"]
+
       # Map all settings to their environment variable names with `key_for` and their values. For example, the if the
       # setting name `e` is `path` with a value of `vendor/bundle`, then it will return `"BUNDLE_PATH" =>
       # "vendor/bundle"`
-      settings.all.to_h do |e|
+      settings
+        .all
+        .reject { |setting| ignored_settings.include?(setting) }
+        .to_h do |e|
         key = settings.key_for(e)
         value = Array(settings[e]).join(":").tr(" ", ":")
 

test/setup_bundler_test.rb

@@ -897,6 +897,51 @@ def test_only_returns_environment_if_bundle_was_composed_ahead_of_time
     end
   end
 
+  def test_ignores_bundle_bin
+    Dir.mktmpdir do |dir|
+      Dir.chdir(dir) do
+        File.write(File.join(dir, "Gemfile"), <<~GEMFILE)
+          source "https://rubygems.org"
+          gem "irb"
+        GEMFILE
+
+        capture_subprocess_io do
+          Bundler.with_unbundled_env do
+            system("bundle", "config", "set", "--local", "bin", "bin")
+            system("bundle", "install")
+
+            assert_path_exists(File.join(dir, "bin"))
+
+            env = RubyLsp::SetupBundler.new(dir, launcher: true).setup!
+            refute_includes(env.keys, "BUNDLE_BIN")
+          end
+        end
+      end
+    end
+  end
+
+  def test_ignores_bundle_package
+    Dir.mktmpdir do |dir|
+      Dir.chdir(dir) do
+        File.write(File.join(dir, "Gemfile"), <<~GEMFILE)
+          source "https://rubygems.org"
+          gem "irb"
+        GEMFILE
+
+        capture_subprocess_io do
+          Bundler.with_unbundled_env do
+            system("bundle", "install")
+            system("bundle", "package")
+
+            env = RubyLsp::SetupBundler.new(dir, launcher: true).setup!
+            refute_includes(env.keys, "BUNDLE_CACHE_ALL")
+            refute_includes(env.keys, "BUNDLE_CACHE_ALL_PLATFORMS")
+          end
+        end
+      end
+    end
+  end
+
   private
 
   def with_default_external_encoding(encoding, &block)