From a7bb154c56d54bcb31e581281110b8ade27657fb Mon Sep 17 00:00:00 2001
From: Alexander Momchilov <alexander.momchilov@shopify.com>
Date: Wed, 1 Apr 2026 15:46:56 -0400
Subject: [PATCH] Replace manual `#copy` with standard `#dup`

---
 lib/spoom/coverage.rb      |  2 +-
 lib/spoom/sorbet/config.rb | 14 ++++++--------
 rbi/spoom.rbi              |  9 +++++----
 3 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/lib/spoom/coverage.rb b/lib/spoom/coverage.rb
index 92b99a24..6079f976 100644
--- a/lib/spoom/coverage.rb
+++ b/lib/spoom/coverage.rb
@@ -15,7 +15,7 @@ def snapshot(context, rbi: true, sorbet_bin: nil)
         config = context.sorbet_config
         config.allowed_extensions.push(".rb", ".rbi") if config.allowed_extensions.empty?
 
-        new_config = config.copy
+        new_config = config.dup
         new_config.allowed_extensions.reject! { |ext| !rbi && ext == ".rbi" }
         flags = [
           "--no-config",
diff --git a/lib/spoom/sorbet/config.rb b/lib/spoom/sorbet/config.rb
index 5bc76195..14b15ce5 100644
--- a/lib/spoom/sorbet/config.rb
+++ b/lib/spoom/sorbet/config.rb
@@ -40,14 +40,12 @@ def initialize
         @no_stdlib = false #: bool
       end
 
-      #: -> Config
-      def copy
-        new_config = Sorbet::Config.new
-        new_config.paths.concat(@paths)
-        new_config.ignore.concat(@ignore)
-        new_config.allowed_extensions.concat(@allowed_extensions)
-        new_config.no_stdlib = @no_stdlib
-        new_config
+      #: (Config source) -> void
+      def initialize_copy(source)
+        super
+        @paths = @paths.dup
+        @ignore = @ignore.dup
+        @allowed_extensions = @allowed_extensions.dup
       end
 
       # Returns self as a string of options that can be passed to Sorbet
diff --git a/rbi/spoom.rbi b/rbi/spoom.rbi
index f9abe5a6..10d9b27c 100644
--- a/rbi/spoom.rbi
+++ b/rbi/spoom.rbi
@@ -2603,10 +2603,6 @@ class Spoom::Sorbet::Config
 
   def allowed_extensions; end
   def allowed_extensions=(_arg0); end
-
-  sig { returns(::Spoom::Sorbet::Config) }
-  def copy; end
-
   def ignore; end
   def ignore=(_arg0); end
 
@@ -2623,6 +2619,11 @@ class Spoom::Sorbet::Config
 
   def paths=(_arg0); end
 
+  private
+
+  sig { params(source: ::Spoom::Sorbet::Config).void }
+  def initialize_copy(source); end
+
   class << self
     sig { params(sorbet_config_path: ::String).returns(::Spoom::Sorbet::Config) }
     def parse_file(sorbet_config_path); end