Start returning composed bundle environment from initialize request

exe/ruby-lsp-launcher

@@ -74,9 +74,6 @@ rescue StandardError => e
   # If Bundler.setup fails, we need to restore the original $LOAD_PATH so that we can still require the Ruby LSP server
   # in degraded mode
   $LOAD_PATH.unshift(File.expand_path("../lib", __dir__))
-ensure
-  require "fileutils"
-  FileUtils.rm(bundle_env_path) if File.exist?(bundle_env_path)
 end
 
 error_path = File.join(".ruby-lsp", "install_error")

lib/ruby_lsp/internal.rb

@@ -21,6 +21,7 @@
 require "prism/visitor"
 require "language_server-protocol"
 require "rbs"
+require "fileutils"
 
 require "ruby-lsp"
 require "ruby_lsp/base_server"

lib/ruby_lsp/server.rb

@@ -216,6 +216,13 @@ def run_initialize(message)
         Hash.new(true)
       end
 
+      bundle_env_path = File.join(".ruby-lsp", "bundle_env")
+      bundle_env = if File.exist?(bundle_env_path)
+        env = File.readlines(bundle_env_path).to_h { |line| T.cast(line.chomp.split("=", 2), [String, String]) }
+        FileUtils.rm(bundle_env_path)
+        env
+      end
+
       document_symbol_provider = Requests::DocumentSymbol.provider if enabled_features["documentSymbols"]
       document_link_provider = Requests::DocumentLink.provider if enabled_features["documentLink"]
       code_lens_provider = Requests::CodeLens.provider if enabled_features["codeLens"]
@@ -269,6 +276,7 @@ def run_initialize(message)
         },
         formatter: @global_state.formatter,
         degraded_mode: !!(@install_error || @setup_error),
+        bundle_env: bundle_env,
       }
 
       send_message(Result.new(id: message[:id], response: response))

project-words

@@ -58,6 +58,7 @@ quxx
 quux
 qorge
 rdbg
+readlines
 realpath
 reparsing
 requireds

test/server_test.rb

@@ -33,6 +33,29 @@ def test_initialize_enabled_features_with_array
     assert_includes(capabilities, "semanticTokensProvider")
   end
 
+  def test_initialize_returns_bundle_env
+    bundle_env_path = File.join(".ruby-lsp", "bundle_env")
+    FileUtils.mkdir(".ruby-lsp") unless File.exist?(".ruby-lsp")
+    File.write(bundle_env_path, "BUNDLE_PATH=vendor/bundle")
+    @server.process_message({
+      id: 1,
+      method: "initialize",
+      params: {
+        initializationOptions: { enabledFeatures: [] },
+        capabilities: { general: { positionEncodings: ["utf-8"] } },
+      },
+    })
+
+    result = find_message(RubyLsp::Result, id: 1)
+    hash = JSON.parse(result.response.to_json)
+
+    begin
+      assert_equal({ "BUNDLE_PATH" => "vendor/bundle" }, hash["bundle_env"])
+    ensure
+      FileUtils.rm(bundle_env_path) if File.exist?(bundle_env_path)
+    end
+  end
+
   def test_initialize_enabled_features_with_hash
     capture_subprocess_io do
       @server.process_message({