[parseArgs] refactoring

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

@@ -1,32 +1,35 @@
 package net.kemitix.s3thorp
 
+import scopt.OParser
+import scopt.OParser.{builder,sequence, parse}
 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 {
+  val defaultConfig = Config("def-bucket", "def-prefix", "def-source")
+
+  val configParser: OParser[Unit, Config] = {
+    val parserBuilder = builder[Config]
+    import parserBuilder._
+    sequence(
+      programName("S3Thorp"),
+      head("s3thorp", "0.1.0"),
+      opt[String]('s', "source")
+        .action((str, c) => c.copy(source = str))
+        .text("Source directory to sync to S3"),
+      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")
+    )
+  }
+
+  def apply(args: List[String]): IO[Config] =
+    parse(configParser, args, defaultConfig) match {
       case Some(config) => IO.pure(config)
       case _ => IO.raiseError(new IllegalArgumentException)
     }
-  }
 
 }