Handle Bun priting loaded env variables on STDERR

Fix: #130

lib/execjs/external_runtime.rb

@@ -194,7 +194,7 @@ def shell_escape(*args)
         require 'shellwords'
 
         def exec_runtime(filename)
-          command = "#{Shellwords.join(binary.split(' ') << filename)} 2>&1"
+          command = "#{Shellwords.join(binary.split(' ') << filename)}"
           io = IO.popen(command, **@popen_options)
           output = io.read
           io.close
@@ -207,7 +207,7 @@ def exec_runtime(filename)
         end
       else
         def exec_runtime(filename)
-          io = IO.popen(binary.split(' ') << filename, **(@popen_options.merge({err: [:child, :out]})))
+          io = IO.popen(binary.split(' ') << filename, **@popen_options)
           output = io.read
           io.close
 

test/test_execjs.rb

@@ -56,6 +56,16 @@ def test_call_with_complex_properties
     assert_equal 2, context.call("(function(bar) { return foo + bar })", 1)
   end
 
+  def test_call_with_env_file
+    Dir.mktmpdir do |dir|
+      Dir.chdir(dir) do
+        # Bun prints on STDOUT when loading .env files
+        File.write(".env", "FOO=BAR")
+        assert_equal 2, ExecJS.eval("1 + 1")
+      end
+    end
+  end
+
   def test_call_with_this
     # Known bug: https://github.com/cowboyd/therubyrhino/issues/39
     skip if ExecJS.runtime.is_a?(ExecJS::RubyRhinoRuntime)