Fix input/output cli flags for new core.os package

src/cli/cli.odin

@@ -5,11 +5,11 @@ import "core:fmt"
 import "core:os"
 
 Options :: struct {
-	verbose:     bool `args:"name=verbose"                        usage:"Enable verbose output"`,
-	compression: u8 `args:"name=compression"                      usage:"Compression level, 0-12"`,
-	size:        i64 `args:"name=size"                            usage:"Chunk size in bytes"`,
-	input:       os.Handle `args:"name=input,file=r,required"     usage:"Path to input directory"`,
-	output:      os.Handle `args:"name=output,file=wc"            usage:"Path to ouput directory"`,
+	verbose:     bool `args:"name=verbose"                    usage:"Enable verbose output"`,
+	compression: u8 `args:"name=compression"                  usage:"Compression level, 0-12"`,
+	size:        i64 `args:"name=size"                        usage:"Chunk size in bytes"`,
+	input:       ^os.File `args:"name=input,file=r,required"  usage:"Path to input directory"`,
+	output:      ^os.File `args:"name=output,file=wc"         usage:"Path to ouput directory"`,
 	// overflow:    [dynamic]string,
 }
 
@@ -24,7 +24,10 @@ parse :: proc() -> Options {
 	}
 
 	if opts.compression > 12 {
-		fmt.eprintln("error: compression should be between 0-12")
+		fmt.eprintln(
+			"error: compression higher than allowed maximum:",
+			opts.compression,
+		)
 		os.exit(1)
 	}