a simple "hash stdin" CLI program using zeebo/blake3

b3sum.go

package main

import (
	"encoding/hex"
	"fmt"
	"io"
	"os"

	"github.com/zeebo/blake3"
)

func main() {
	buf := [65536]byte{}
	hasher := blake3.New()
	for {
		n, err := os.Stdin.Read(buf[:])
		hasher.Write(buf[:n])
		if err == io.EOF {
			break
		} else if err != nil {
			panic(err)
		}
	}
	hash := hasher.Sum([]byte{})
	fmt.Println(hex.EncodeToString(hash))
}