feat: parallelise compilation of multiple files given to cli

src/main/wacc/Main.scala

@@ -16,11 +16,6 @@ import com.monovore.decline.Argument
 
 import assemblyIR as asm
 
-
-case class CliConfig(
-    file: File = new File(".")
-)
-
 given Argument[File] = Argument.from("file") { str =>
   val file = File(str)
   (
@@ -94,11 +89,14 @@ object Main
       version = "1.0"
     ) {
   def main: Opts[IO[ExitCode]] =
-    Opts.argument[File]("file").map { file =>
-      compile(
-        file.getAbsolutePath,
-        outFile = Some(File(".", file.getName.stripSuffix(".wacc") + ".s"))
-      ).map(ExitCode(_)) // turn the int into exit code for compatibility with commandioapp
-      // https://ben.kirw.in/decline/effect.html
+    Opts.arguments[File]("files").map { files =>
+      files
+        .parTraverse_ { file =>
+          compile(
+            file.getAbsolutePath,
+            outFile = Some(File(".", file.getName.stripSuffix(".wacc") + ".s"))
+          )
+        }
+        .as(ExitCode.Success)
     }
 }