From 6f14cd7c0654efc524c6c850f676f99546619d66 Mon Sep 17 00:00:00 2001
From: Zorchenhimer <zorchenhimer@gmail.com>
Date: Thu, 18 Dec 2025 21:38:02 -0500
Subject: [PATCH] [fdsextract] Add --output option

Currently only available when extracting single files.  Will use the
given filename as the output name instead of constructing one.

TODO: Make this value a template that can be used with multiple files.
---
 cmd/fdsextract.go | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/cmd/fdsextract.go b/cmd/fdsextract.go
index fdc32b8..b3b8af0 100644
--- a/cmd/fdsextract.go
+++ b/cmd/fdsextract.go
@@ -20,6 +20,8 @@ type Arguments struct {
 
 	FileNum int `arg:"--file-num" default:"-1"`
 	Range string `arg:"--range"`
+
+	Output string `arg:"--output"`
 }
 
 func main() {
@@ -39,10 +41,19 @@ func run(args *Arguments) error {
 		return err
 	}
 
-	outdir := strings.TrimSuffix(args.Input, filepath.Ext(args.Input))
-	err = os.MkdirAll(outdir, 0775)
-	if err != nil {
-		return err
+	if args.Output != "" && args.FileNum == -1 {
+		return fmt.Errorf("--output can only be used when exporting a single file")
+	}
+
+	outdir := "./"
+	if args.Output == "" {
+		outdir = strings.TrimSuffix(args.Input, filepath.Ext(args.Input))
+	}
+	if args.Output != "" {
+		err = os.MkdirAll(outdir, 0775)
+		if err != nil {
+			return err
+		}
 	}
 
 	if args.Side >= 0 && args.FileNum == -1 {
@@ -100,7 +111,11 @@ func run(args *Arguments) error {
 			end = file.Size
 		}
 
-		fileName := filepath.Join(outdir, fmt.Sprintf("%03d_%s_%02d_%02X", args.FileNum, sideName, file.Number, file.Id))
+		fileName := args.Output
+		if fileName == "" {
+			fileName = filepath.Join(outdir, fmt.Sprintf("%03d_%s_%02d_%02X", args.FileNum, sideName, file.Number, file.Id))
+		}
+
 		fmt.Println("fileName:", fileName)
 		err := os.WriteFile(fileName, file.Data[start:end], 0664)
 		if err != nil {