From 777be19931f9d15e8bf663112551f82657d6954b Mon Sep 17 00:00:00 2001
From: NiseVoid <nisevoid@gmail.com>
Date: Sat, 17 Sep 2016 19:32:27 +0200
Subject: [PATCH] Initial commit

---
 main.go | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 main.go

diff --git a/main.go b/main.go
new file mode 100644
index 0000000..b69a0ca
--- /dev/null
+++ b/main.go
@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"hash/crc32"
+	"io"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+func main() {
+	regex, _ := regexp.Compile(` \[[A-Z0-9]{8}\]$`)
+	files := os.Args[1:]
+
+	for _, name := range files {
+		file, err := os.Open(name)
+		if err != nil {
+			fmt.Printf(`Couldn't open file "%s", exiting ...`, name)
+			os.Exit(1)
+		}
+
+		ext := filepath.Ext(name)
+		basename := name[0 : len(name)-len(ext)]
+		if regex.MatchString(basename) {
+			basename = basename[0 : len(basename)-11]
+		}
+
+		hash := crc32.NewIEEE()
+
+		io.Copy(hash, file)
+
+		err = file.Close()
+		if err != nil {
+			fmt.Printf(`Couldn't close file "%s", exiting ...`, name)
+			os.Exit(1)
+		}
+
+		sum := fmt.Sprintf(`%X`, hash.Sum32())
+		sum = strings.Repeat(`0`, 8-len(sum)) + sum
+
+		err = os.Rename(name, fmt.Sprintf("%s [%s]%s", basename, sum, ext))
+		if err != nil {
+			fmt.Printf(`Couldn't rename file "%s", exiting ...`, name)
+			os.Exit(1)
+		}
+	}
+}