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ssh.go
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/
ssh.go
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package ssh
import (
"io"
"os"
"runtime"
"github.com/bryanl/doit/pkg/runner"
"github.com/bryanl/doit/pkg/term"
"golang.org/x/crypto/ssh"
)
func sshConnect(user string, host string, method ssh.AuthMethod) error {
sshc := &ssh.ClientConfig{
User: user,
Auth: []ssh.AuthMethod{method},
}
conn, err := ssh.Dial("tcp", host, sshc)
if err != nil {
return err
}
defer func() {
_ = conn.Close()
}()
session, err := conn.NewSession()
if err != nil {
return err
}
defer func() {
_ = session.Close()
}()
session.Stdout = os.Stdout
session.Stderr = os.Stderr
session.Stdin = os.Stdin
var (
termWidth, termHeight int
)
fd := os.Stdin.Fd()
oldState, err := term.MakeRaw(fd)
if err != nil {
return err
}
defer func() {
_ = term.RestoreTerminal(fd, oldState)
}()
winsize, err := term.GetWinsize(fd)
if err != nil {
termWidth = 80
termHeight = 24
} else {
termWidth = int(winsize.Width)
termHeight = int(winsize.Height)
}
modes := ssh.TerminalModes{
ssh.ECHO: 1,
}
if err := session.RequestPty("xterm", termHeight, termWidth, modes); err != nil {
return err
}
if err == nil {
err = session.Shell()
}
if err != nil {
return err
}
err = session.Wait()
if _, ok := err.(*ssh.ExitError); ok {
return nil
}
if err == io.EOF {
return nil
}
return err
}
// Runner runs ssh commands.
type Runner struct {
User string
Host string
KeyPath string
Port int
}
var _ runner.Runner = &Runner{}
// Run ssh.
func (r *Runner) Run() error {
if runtime.GOOS == "windows" {
return runInternalSSH(r)
}
return runExternalSSH(r)
}