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package nodes
import (
"bytes"
"compress/gzip"
"fmt"
"io/ioutil"
"os"
"os/exec"
)
// Gzips a file
func GzipFile(path string) ([]byte, error) {
var buf bytes.Buffer
w := gzip.NewWriter(&buf)
contents, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
_, err = w.Write(contents)
if err != nil {
return nil, err
}
err = w.Close()
if err != nil {
return nil, err
}
result := buf.Bytes()
return result, nil
}
// Packs a directory into a gzipped ISO image
func PackDirectoryAsISO(path string) ([]byte, error) {
iso, err := ioutil.TempFile("", "gophercloud-iso")
if err != nil {
return nil, err
}
iso.Close()
defer os.Remove(iso.Name())
cmd := exec.Command(
"mkisofs",
"-o", iso.Name(),
"-ldots",
"-allow-lowercase",
"-allow-multidot", "-l",
"-publisher", "gophercloud",
"-quiet", "-J",
"-r", "-V", "config-2",
path,
)
if err = cmd.Run(); err != nil {
return nil, fmt.Errorf("error creating configdrive iso: %s", err.Error())
}
return GzipFile(iso.Name())
}
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