Add version option

exe/retest

@@ -13,6 +13,11 @@ if options.help?
   return
 end
 
+if options.version?
+  $stdout.puts Retest::VERSION
+  return
+end
+
 prompt     = Retest::Prompt.new
 repository = Retest::Repository.new(files: Retest::VersionControl.files, prompt: prompt)
 command    = Retest::Command.for_options(options)

features/ruby-bare/retest/flags/version.rb

@@ -0,0 +1,13 @@
+class TestVersionFlag < Minitest::Test
+  def test_version
+    @output, @pid = launch_retest 'retest --version'
+
+    assert_match /^1\.\d+\.\d+/, @output.read
+  end
+
+  def test_version_short_flag
+    @output, @pid = launch_retest 'retest -v'
+
+    assert_match /^1\.\d+\.\d+/, @output.read
+  end
+end

features/ruby-bare/retest/retest_test.rb

@@ -10,6 +10,7 @@
 require_relative 'scenarios/interruptions.rb'
 
 require_relative 'flags/help.rb'
+require_relative 'flags/version.rb'
 
 $stdout.sync = true
 

lib/retest/options.rb

@@ -85,6 +85,12 @@ class Options
       desc "Print usage"
     end
 
+    flag :version do
+      short "-v"
+      long "--version"
+      desc "Print retest version"
+    end
+
     option :polling do
       long '--polling'
       desc <<~DESC.strip
@@ -133,6 +139,10 @@ def help?
       params[:help]
     end
 
+    def version?
+      params[:version]
+    end
+
     def full_suite?
       params[:all]
     end

test/retest/options/help.txt

@@ -23,6 +23,7 @@ Options:
       --rake             Shortcut for a standard Rake setup
       --rspec            Shortcut for a standard RSpec setup
       --ruby             Shortcut for a Ruby project
+  -v, --version          Print retest version
 
 Examples:
   Runs a matching rails test after a file change

test/retest/options_test.rb

@@ -32,6 +32,17 @@ def test_help_text
       assert_equal File.read('test/retest/options/help.txt'), @subject.help
     end
 
+    def test_version?
+      @subject.args = ["--version"]
+      assert @subject.version?
+
+      @subject.args = ["-v"]
+      assert @subject.version?
+
+      @subject.args = ["-h"]
+      refute @subject.version?
+    end
+
     def test_notify?
       refute @subject.notify?
       @subject.args = ["--notify"]