[parseArgs] extract to object

src/main/scala/net/kemitix/s3thorp/Main.scala

@@ -5,31 +5,6 @@ import cats.effect.{ExitCode, IO, IOApp}
 
 object Main extends IOApp {
 
-  def parseArgs(args: List[String]): IO[Config] = {
-    import scopt.OParser
-    val builder = OParser.builder[Config]
-    val configParser: OParser[Unit, Config] = {
-      import builder._
-      OParser.sequence(
-        programName("S3Thorp"),
-        head("s3thorp", "0.1.0"),
-        opt[String]('s', "source")
-          .action((str, c) => c.copy(source = str)),
-        opt[String]('b', "bucket")
-          .action((str, c) => c.copy(bucket = str))
-          .text("S3 bucket name"),
-        opt[String]('p', "prefix")
-          .action((str, c) => c.copy(prefix = str))
-          .text("Prefix within the S3 Bucket")
-      )
-    }
-    val defaultConfig = Config("def-bucket", "def-prefix", "def-source")
-    OParser.parse(configParser, args, defaultConfig) match {
-      case Some(config) => IO.pure(config)
-      case _ => IO.raiseError(new IllegalArgumentException)
-    }
-  }
-
   def putStrLn(value: String) = IO { println(value) }
 
   def sync(c: Config): IO[Unit] =
@@ -40,7 +15,7 @@ object Main extends IOApp {
 
   def program(args: List[String]): IO[ExitCode] =
     for {
-      a <- parseArgs(args)
+      a <- ParseArgs(args)
       _ <- sync(a)
     } yield ExitCode.Success
 

src/main/scala/net/kemitix/s3thorp/ParseArgs.scala

@@ -0,0 +1,32 @@
+package net.kemitix.s3thorp
+
+import cats.effect.IO
+
+object ParseArgs {
+
+  def apply(args: List[String]): IO[Config] = {
+    import scopt.OParser
+    val builder = OParser.builder[Config]
+    val configParser: OParser[Unit, Config] = {
+      import builder._
+      OParser.sequence(
+        programName("S3Thorp"),
+        head("s3thorp", "0.1.0"),
+        opt[String]('s', "source")
+          .action((str, c) => c.copy(source = str)),
+        opt[String]('b', "bucket")
+          .action((str, c) => c.copy(bucket = str))
+          .text("S3 bucket name"),
+        opt[String]('p', "prefix")
+          .action((str, c) => c.copy(prefix = str))
+          .text("Prefix within the S3 Bucket")
+      )
+    }
+    val defaultConfig = Config("def-bucket", "def-prefix", "def-source")
+    OParser.parse(configParser, args, defaultConfig) match {
+      case Some(config) => IO.pure(config)
+      case _ => IO.raiseError(new IllegalArgumentException)
+    }
+  }
+
+}