Support environment argument

Author: ksss

stdlib/open3/0/open3.rbs

@@ -48,6 +48,8 @@
 #     Options](rdoc-ref:Process@Execution+Options).
 #
 module Open3
+  type env = Hash[String, String]
+
   # <!--
   #   rdoc-file=lib/open3.rb
   #   - Open3.capture2([env, ] command_line, options = {}) -> [stdout_s, status]
@@ -144,6 +146,7 @@ module Open3
   #     # => ["hello world\n", #<Process::Status: pid 2326299 exit 0>]
   #
   def self?.capture2: (*String, ?stdin_data: String, ?binmode: boolish) -> [String, Process::Status]
+                    | (env, *String, ?stdin_data: String, ?binmode: boolish) -> [String, Process::Status]
 
   # <!--
   #   rdoc-file=lib/open3.rb
@@ -241,4 +244,5 @@ module Open3
   #     # => ["hello world\n", #<Process::Status: pid 2371894 exit 0>]
   #
   def self?.capture2e: (*String, ?stdin_data: String, ?binmode: boolish) -> [String, Process::Status]
+                     | (env, *String, ?stdin_data: String, ?binmode: boolish) -> [String, Process::Status]
 end

test/stdlib/Open3_test.rb

@@ -13,6 +13,8 @@ def test_capture2
                      Open3, :capture2, 'echo "Foo"', binmode: true
     assert_send_type "(*::String, stdin_data: ::String) -> [ ::String, ::Process::Status ]",
                      Open3, :capture2, "#{RUBY_EXECUTABLE} -e 'puts STDIN.read'", stdin_data: 'Foo'
+    assert_send_type "(::Hash[::String, ::String], *::String) -> [ ::String, ::Process::Status ]",
+                     Open3, :capture2, { 'FOO' => 'BAR' }, "echo $FOO"
   end
 
   def test_capture2e
@@ -22,6 +24,8 @@ def test_capture2e
                      Open3, :capture2e, 'echo "Foo"', binmode: true
     assert_send_type "(*::String, stdin_data: ::String) -> [ ::String, ::Process::Status ]",
                      Open3, :capture2e, "#{RUBY_EXECUTABLE} -e 'puts STDIN.read'", stdin_data: 'Foo'
+    assert_send_type "(::Hash[::String, ::String], *::String) -> [ ::String, ::Process::Status ]",
+                     Open3, :capture2e, { 'FOO' => 'BAR' }, "echo $FOO"
   end
 end