checksums.go

package main

import (
	"crypto/sha1"
	"fmt"
	"io"
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
	"strings"
)

func main() {
	var sums []byte

	filepath.Walk(".", func(path string, info os.FileInfo, err error) error {
		if strings.Contains(path, ".git") {
			return nil
		}

		if info.IsDir() {
			return nil
		}

		if !info.Mode().IsRegular() {
			return nil
		}

		filename := fmt.Sprintf(path)

		f, err := os.Open(filename)
		if err != nil {
			log.Fatal(err)
		}
		defer f.Close()

		h := sha1.New()
		if _, err := io.Copy(h, f); err != nil {
			log.Fatal(err)
		}

		sum := h.Sum(nil)
		sums = append(sums, []byte(fmt.Sprintf("%s | %x\n", filename, sum))...)

		return nil
	})

	ioutil.WriteFile("sha1sums.txt", sums, 0644)

	return
}