Implement size and compression print

main.go

@@ -14,7 +14,7 @@ import (
 
 var codecs = map[string]codec.Coder{
 	".jpg":  codec.JPGCoder{},
-	".jpeg":  codec.JPGCoder{},
+	".jpeg": codec.JPGCoder{},
 	".png":  codec.PNGCoder{},
 	".webp": codec.WebpCoder{},
 }
@@ -50,7 +50,7 @@ func main() {
 	log.Printf("Using quality: %d", *quality)
 	log.Printf("Transcoding to: %s", *to)
 	log.Printf("Nosafe mode: %v", *nosafe)
-	log.Printf("Remove mode: %v",  *rm)
+	log.Printf("Remove mode: %v", *rm)
 
 	var wg sync.WaitGroup
 	for _, file := range flag.Args() {
@@ -65,7 +65,6 @@ func main() {
 				Error.Printf("No encoder found for file: %s", file)
 				return
 			}
-			log.Printf("%#v", coder)
 
 			filename := filepath.Base(file)
 			if *nosafe {
@@ -82,6 +81,12 @@ func main() {
 				Error.Printf("Failed to open file: %v", err)
 				return
 			}
+			stat, err := filehandle.Stat()
+			if err != nil {
+				Error.Printf("Failed to get file stats: %v", err)
+				return
+			}
+			originalSize := stat.Size()
 
 			log.Printf("Decoding %s", file)
 			image, err := coder.Decode(filehandle)
@@ -111,7 +116,7 @@ func main() {
 				Error.Printf("Failed to write file %s: %v", newfile, err)
 				return
 			}
-			log.Printf("Wrote %d bytes to %s", n, newfile)
+			log.Printf("Wrote %dKB; Old size: %dKB; Compression: %.2f", n/1024, originalSize/1024, float32(n)/float32(originalSize))
 
 			if *rm {
 				if file == newfile {
@@ -120,7 +125,7 @@ func main() {
 				}
 				log.Printf("Removing %s", file)
 				err = os.Remove(file)
-				if err!= nil {
+				if err != nil {
 					Error.Printf("Failed to remove file %v: %v", file, err)
 					return
 				}