gogunzip.go

package main

import (
  "compress/gzip"
  "io"
  "os"
)

// usage `cat foo.gz | ./gogunzip > foo`
func main() {
  gr, err := gzip.NewReader(os.Stdin)
  if err != nil {
    os.Stderr.WriteString(err.Error())
    os.Exit(1)
  }
  defer gr.Close()
  if _, err := io.Copy(os.Stdout, gr); err != nil {
    os.Stderr.WriteString(err.Error())
    os.Exit(1)
  }
}

gogzip.go

package main

import (
  "compress/gzip"
  "io"
  "os"
)

// usage `cat foo | ./gogzip > foo.gz`
func main() {
  gw := gzip.NewWriter(os.Stdout)
  defer gw.Close()
  if _, err := io.Copy(gw, os.Stdin); err != nil {
    os.Stderr.WriteString(err.Error())
    os.Exit(1)
  }
}