Show right version of scalaunfmt in help message

build.sbt

@@ -5,6 +5,7 @@ val scoptV = "3.7.1"
 val similarityV = "1.2.1"
 
 lazy val scalaunfmt = (project in file(".")).
+  enablePlugins(BuildInfoPlugin).
   settings(
     name := "scalaunfmt",
     organization := "com.github.tanishiking",
@@ -30,6 +31,9 @@ lazy val scalaunfmt = (project in file(".")).
       "-opt-inline-from"
     ),
 
+    buildInfoKeys := Seq[BuildInfoKey](version),
+    buildInfoPackage := "com.github.tanishiking.scalaunfmt",
+
     homepage := Some(url("https://github.com/tanishiking/scalaunfmt")),
     licenses := List("MIT License" -> url("http://www.opensource.org/licenses/mit-license.php")),
     developers := List(

project/plugins.sbt

@@ -1,2 +1,3 @@
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.0.5")
-addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.3.2")
+addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.3.2")
+addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.9.0")

src/main/scala/com/github/tanishiking/scalaunfmt/cli/CliArgParser.scala

@@ -1,4 +1,5 @@
-package com.github.tanishiking.scalaunfmt.cli
+package com.github.tanishiking.scalaunfmt
+package cli
 
 import java.io.File
 
@@ -8,7 +9,7 @@ object CliArgParser {
   val scoptParser: OptionParser[CliOptions] =
     new scopt.OptionParser[CliOptions]("scalaunfmt") {
 
-      head("scalaunfmt", "0.0.3")
+      head("scalaunfmt", BuildInfo.version)
       arg[File]("<file>...")
         .optional()
         .unbounded()