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package main
// An example Bubble Tea server. This will put an ssh session into alt screen
// and continually print up to date terminal information.
import (
"fmt"
"log"
"os"
"os/signal"
"syscall"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/wish"
bm "github.com/charmbracelet/wish/bubbletea"
lm "github.com/charmbracelet/wish/logging"
"github.com/gliderlabs/ssh"
)
const host = "localhost"
const port = 23234
func main() {
s, err := wish.NewServer(
wish.WithAddress(fmt.Sprintf("%s:%d", host, port)),
wish.WithHostKeyPath(".ssh/term_info_ed25519"),
wish.WithMiddleware(
bm.Middleware(teaHandler),
lm.Middleware(),
),
)
if err != nil {
log.Fatalln(err)
}
done := make(chan os.Signal, 1)
signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
log.Printf("Starting SSH server on %s:%d", host, port)
go func() {
if err = s.ListenAndServe(); err != nil {
log.Fatalln(err)
}
}()
<-done
log.Println("Stopping SSH server")
if err := s.Close(); err != nil {
log.Fatalln(err)
}
}
// You can wire any Bubble Tea model up to the middleware with a function that
// handles the incoming ssh.Session. Here we just grab the terminal info and
// pass it to the new model. You can also return tea.ProgramOptions (such as
// teaw.WithAltScreen) on a session by session basis
func teaHandler(s ssh.Session) (tea.Model, []tea.ProgramOption) {
pty, _, active := s.Pty()
if !active {
fmt.Println("no active terminal, skipping")
return nil, nil
}
m := model{
term: pty.Term,
width: pty.Window.Width,
height: pty.Window.Height,
}
return m, []tea.ProgramOption{tea.WithAltScreen()}
}
// Just a generic tea.Model to demo terminal information of ssh.
type model struct {
term string
width int
height int
}
func (m model) Init() tea.Cmd {
return nil
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.WindowSizeMsg:
m.height = msg.Height
m.width = msg.Width
case tea.KeyMsg:
switch msg.String() {
case "q", "ctrl+c":
return m, tea.Quit
}
}
return m, nil
}
func (m model) View() string {
s := "Your term is %s\n"
s += "Your window size is x: %d y: %d\n\n"
s += "Press 'q' to quit\n"
return fmt.Sprintf(s, m.term, m.width, m.height)
}
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