Simple golang gzip compression

gzip.go

// Thanks purpleidea for putting this together!
// Why isn't this the default example in the golang docs?
package main

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

func main() {
	dest := "/tmp/output.gz"
	input := "/tmp/input.tar"

	inputFile, err := os.Open(input) // io.Reader
	if err != nil {
		panic(err)
	}
	defer inputFile.Close()

	outputFile, err := os.Create(dest) // io.Writer
	if err != nil {
		panic(err)
	}
	defer outputFile.Close()

	level := gzip.BestSpeed
	gzipWriter, err := gzip.NewWriterLevel(outputFile, level) // (*gzip.Writer, error)
	if err != nil {
		panic(err)
	}
	defer gzipWriter.Close()

	// Copy the input file into the writer, which writes it out compressed.
	bytes, err := io.Copy(gzipWriter, inputFile) // dst, src
	if err != nil {
		panic(err)
	}
	fmt.Printf("wrote: %+v\n", bytes)
}