add options

src/git-ahead-check.cr

@@ -1,4 +1,25 @@
 require "colorize"
+require "option_parser"
+
+VERSION = {{ `shards version "#{__DIR__}"`.chomp.stringify }}
+
+begin
+  OptionParser.parse do |parser|
+    parser.banner = "The very simple password manager for humans\n"
+
+    parser.on "-h", "--help", "Show help" do
+      puts parser
+      exit(0)
+    end
+
+    parser.on "-v", "Show version" do
+      puts VERSION
+      exit(0)
+    end
+  end
+rescue ex
+  puts ex.message, ""
+end
 
 CONFIG_PATH = "#{ENV["HOME"]}/.config/emilecok/git-ahead-check"