ScalafmtDynamic: use real build version as current

scalafmt-dynamic/src/main/scala/org/scalafmt/dynamic/ScalafmtDynamic.scala

@@ -133,11 +133,10 @@ final case class ScalafmtDynamic(
   ): FormatEval[ScalafmtReflectConfig] = {
     for {
       version <- readVersion(configPath)
+      current = ScalafmtReflect.current
       fmtReflect <-
-        if (version == ScalafmtVersion.current)
-          Right(ScalafmtReflect.current)
-        else
-          resolveFormatter(configPath, version)
+        if (version == current.version) Right(current)
+        else resolveFormatter(configPath, version)
       config <- fmtReflect.parseConfig(configPath).toEither.left.map {
         case ex: ScalafmtDynamicError => ex
         case ex => new UnknownConfigError(configPath, ex)

scalafmt-dynamic/src/main/scala/org/scalafmt/dynamic/ScalafmtReflect.scala

@@ -182,6 +182,11 @@ case class ScalafmtReflect(
 }
 
 object ScalafmtReflect {
-  val current =
-    ScalafmtReflect(getClass.getClassLoader, ScalafmtVersion.current, false)
+
+  lazy val current = ScalafmtReflect(
+    getClass.getClassLoader,
+    ScalafmtVersion.parse(BuildInfo.stable).get,
+    false
+  )
+
 }

scalafmt-dynamic/src/main/scala/org/scalafmt/dynamic/ScalafmtVersion.scala

@@ -27,13 +27,10 @@ case class ScalafmtVersion(
 
 object ScalafmtVersion {
 
-  val current = ScalafmtVersion(Int.MaxValue / 100, 0, 0)
-
   private val versionRegex = """(\d)\.(\d)\.(\d)(?:-RC(\d))?(-SNAPSHOT)?""".r
 
   def parse(version: String): Option[ScalafmtVersion] =
     version match {
-      case "current" => Some(current)
       case versionRegex(major, minor, patch, rc, snapshot) =>
         Try {
           ScalafmtVersion(

scalafmt-tests/src/test/scala/org/scalafmt/dynamic/DynamicSuite.scala

@@ -449,7 +449,7 @@ class DynamicSuite extends FunSuite {
 
   check("invalid config in current") { f =>
     f.setConfig(
-      s"""|version=current
+      s"""|version=${BuildInfo.stable}
         |align=does-not-exist
         |""".stripMargin
     )
@@ -484,4 +484,24 @@ class DynamicSuite extends FunSuite {
     assert(thrown.getMessage.startsWith("Invalid config: Type mismatch;"))
   }
 
+  check("invalid version - current") { f =>
+    f.setConfig(
+      s"""|version=current
+        |""".stripMargin
+    )
+    val error =
+      f.assertThrows[ScalafmtDynamicError.ConfigInvalidVersion]().getMessage
+    assertEquals(error, "Invalid version: current")
+  }
+
+  check("invalid version - missing") { f =>
+    f.setConfig(
+      s"""|maxColumn = 40
+        |""".stripMargin
+    )
+    val error =
+      f.assertThrows[ScalafmtDynamicError.ConfigMissingVersion]().getMessage
+    assertEquals(error, "Missing version")
+  }
+
 }