From eefaa525e2ffaa72ccd52aa9c181c014a889d612 Mon Sep 17 00:00:00 2001
From: Marc-Andre Lafortune <github@marc-andre.ca>
Date: Tue, 12 May 2020 03:55:46 -0400
Subject: [PATCH] Have `rubocop -V` output rubocop-ast's version

---
 lib/rubocop/version.rb               | 6 ++++--
 spec/rubocop/cli/cli_options_spec.rb | 9 +++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/lib/rubocop/version.rb b/lib/rubocop/version.rb
index 4d9e960987a..b8101132f0d 100644
--- a/lib/rubocop/version.rb
+++ b/lib/rubocop/version.rb
@@ -5,12 +5,14 @@ module RuboCop
   module Version
     STRING = '0.83.0'
 
-    MSG = '%<version>s (using Parser %<parser_version>s, running on ' \
-          '%<ruby_engine>s %<ruby_version>s %<ruby_platform>s)'
+    MSG = '%<version>s (using Parser %<parser_version>s, '\
+          'rubocop-ast %<rubocop_ast_version>s, ' \
+          'running on %<ruby_engine>s %<ruby_version>s %<ruby_platform>s)'
 
     def self.version(debug = false)
       if debug
         format(MSG, version: STRING, parser_version: Parser::VERSION,
+                    rubocop_ast_version: RuboCop::AST::Version::STRING,
                     ruby_engine: RUBY_ENGINE, ruby_version: RUBY_VERSION,
                     ruby_platform: RUBY_PLATFORM)
       else
diff --git a/spec/rubocop/cli/cli_options_spec.rb b/spec/rubocop/cli/cli_options_spec.rb
index 5b12f037aa0..2f40537fef6 100644
--- a/spec/rubocop/cli/cli_options_spec.rb
+++ b/spec/rubocop/cli/cli_options_spec.rb
@@ -148,6 +148,15 @@
     end
   end
 
+  describe '-V' do
+    it 'exits cleanly' do
+      expect(cli.run(['-V'])).to eq(0)
+      expect($stdout.string).to include(RuboCop::Version::STRING)
+      expect($stdout.string).to match(/Parser \d\.\d\.\d/)
+      expect($stdout.string).to match(/rubocop-ast \d\.\d\.\d/)
+    end
+  end
+
   describe '--only' do
     context 'when one cop is given' do
       it 'runs just one cop' do