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nixpkgs/pkgs/build-support/docker/tarsum.go
Nathan Zadoks b9284e445b dockerTools: disable compression in tarsum.go
Previously, tarsum would compress the (discarded) tarball produced.
That's a waste of CPU, and a waste of time.
2016-07-02 02:22:36 -04:00

25 lines
316 B
Go

package main
import (
"fmt"
"io"
"io/ioutil"
"os"
"tarsum"
)
func main() {
ts, err := tarsum.NewTarSum(os.Stdin, true, tarsum.Version1)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
if _, err = io.Copy(ioutil.Discard, ts); err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println(ts.Sum(nil))
}