/
external_ssh.go
59 lines (50 loc) · 1.11 KB
/
external_ssh.go
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package scp
import (
"bytes"
"fmt"
"strings"
"golang.org/x/crypto/ssh"
)
func sshCreateSymbolicLink(cli *ssh.Client, source, target string) (bool, error) {
out, _ := sshRunCommand(cli, "ls -l "+target)
if out != "" {
if strings.Contains(out, " -> "+source) {
return false, nil
}
return false, fmt.Errorf("%q exist", target)
}
if _, err := sshRunCommand(cli, fmt.Sprintf("ln -s %s %s", source, target)); err != nil {
return false, err
}
return true, nil
}
func sshGetFileMd5(client *ssh.Client, file string) (string, error) {
out, err := sshRunCommand(client, "md5sum "+file)
if err != nil {
return "", err
}
ss := strings.Split(out, " ")
if len(ss) >= 2 {
return ss[0], nil
}
return "", fmt.Errorf("invalid md5: %q", out)
}
func sshRunCommand(cli *ssh.Client, cmd string) (string, error) {
s, err := cli.NewSession()
if err != nil {
return "", err
}
o := new(bytes.Buffer)
e := new(bytes.Buffer)
s.Stdout = o
s.Stderr = e
err = s.Run(cmd)
if err != nil {
ee := strings.TrimSpace(e.String())
if ee != "" {
return "", fmt.Errorf(ee)
}
return "", err
}
return o.String(), nil
}