chore: add ssh example

This commit is contained in:
Ayman Bagabas 2022-10-03 14:59:14 -04:00
parent 6f6b47fbe3
commit 3fe14d0547
7 changed files with 347 additions and 0 deletions

1
.gitignore vendored Normal file
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ssh_example_ed25519*

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examples/ssh/go.mod Normal file
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module ssh
go 1.16
replace github.com/charmbracelet/lipgloss => ../..
require (
github.com/charmbracelet/bubbletea v0.20.0
github.com/charmbracelet/lipgloss v0.4.0
github.com/charmbracelet/wish v0.5.0
github.com/gliderlabs/ssh v0.3.4
github.com/kr/pty v1.1.1
github.com/lucasb-eyer/go-colorful v1.2.0
github.com/muesli/termenv v0.13.0
)

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examples/ssh/go.sum Normal file
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github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
github.com/Microsoft/go-winio v0.4.16/go.mod h1:XB6nPKklQyQ7GC9LdcBEcBl8PF76WugXOPRXwdLnMv0=
github.com/ProtonMail/go-crypto v0.0.0-20210428141323-04723f9f07d7/go.mod h1:z4/9nQmJSSwwds7ejkxaJwO37dru3geImFUdJlaLzQo=
github.com/acomagu/bufpipe v1.0.3/go.mod h1:mxdxdup/WdsKVreO5GpW4+M/1CE2sMG4jeGJ2sYmHc4=
github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
github.com/aymanbagabas/go-osc52 v1.0.3 h1:DTwqENW7X9arYimJrPeGZcV0ln14sGMt3pHZspWD+Mg=
github.com/aymanbagabas/go-osc52 v1.0.3/go.mod h1:zT8H+Rk4VSabYN90pWyugflM3ZhpTZNC7cASDfUCdT4=
github.com/caarlos0/sshmarshal v0.0.0-20220308164159-9ddb9f83c6b3/go.mod h1:7Pd/0mmq9x/JCzKauogNjSQEhivBclCQHfr9dlpDIyA=
github.com/caarlos0/sshmarshal v0.1.0 h1:zTCZrDORFfWh526Tsb7vCm3+Yg/SfW/Ub8aQDeosk0I=
github.com/caarlos0/sshmarshal v0.1.0/go.mod h1:7Pd/0mmq9x/JCzKauogNjSQEhivBclCQHfr9dlpDIyA=
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github.com/charmbracelet/keygen v0.3.0 h1:mXpsQcH7DDlST5TddmXNXjS0L7ECk4/kLQYyBcsan2Y=
github.com/charmbracelet/keygen v0.3.0/go.mod h1:1ukgO8806O25lUZ5s0IrNur+RlwTBERlezdgW71F5rM=
github.com/charmbracelet/wish v0.5.0 h1:FkkdNBFqrLABR1ciNrAL2KCxoyWfKhXnIGZw6GfAtPg=
github.com/charmbracelet/wish v0.5.0/go.mod h1:5GAn5SrDSZ7cgKjnC+3kDmiIo7I6k4/AYiRzC4+tpCk=
github.com/containerd/console v1.0.3 h1:lIr7SlA5PxZyMV30bDW0MGbiOPXwc63yRuCP0ARubLw=
github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U=
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github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
github.com/gliderlabs/ssh v0.3.4 h1:+AXBtim7MTKaLVPgvE+3mhewYRawNLTd+jEEz/wExZw=
github.com/gliderlabs/ssh v0.3.4/go.mod h1:ZSS+CUoKHDrqVakTfTWUlKSr9MtMFkC4UvtQKD7O914=
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github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
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github.com/kevinburke/ssh_config v0.0.0-20201106050909-4977a11b4351/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
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github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
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198
examples/ssh/main.go Normal file
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package main
import (
"fmt"
"log"
"os"
"strings"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
"github.com/charmbracelet/wish"
bm "github.com/charmbracelet/wish/bubbletea"
lm "github.com/charmbracelet/wish/logging"
"github.com/gliderlabs/ssh"
"github.com/kr/pty"
"github.com/lucasb-eyer/go-colorful"
"github.com/muesli/termenv"
)
type sshOutput struct {
ssh.Session
tty *os.File
}
func (s *sshOutput) Write(p []byte) (int, error) {
return s.Session.Write(p)
}
func (s *sshOutput) Fd() uintptr {
return s.tty.Fd()
}
type sshEnviron struct {
environ []string
}
func (s *sshEnviron) Getenv(key string) string {
for _, v := range s.environ {
if strings.HasPrefix(v, key+"=") {
return v[len(key)+1:]
}
}
return ""
}
func (s *sshEnviron) Environ() []string {
return s.environ
}
func outputFromSession(s ssh.Session) *termenv.Output {
sshPty, _, _ := s.Pty()
_, tty, err := pty.Open()
if err != nil {
panic(err)
}
o := &sshOutput{
Session: s,
tty: tty,
}
environ := s.Environ()
environ = append(environ, fmt.Sprintf("TERM=%s", sshPty.Term))
e := &sshEnviron{
environ: environ,
}
return termenv.NewOutput(o, termenv.WithEnvironment(e))
}
func main() {
addr := ":3456"
s, err := wish.NewServer(
wish.WithAddress(addr),
wish.WithHostKeyPath("ssh_example"),
wish.WithMiddleware(
bm.Middleware(func(s ssh.Session) (tea.Model, []tea.ProgramOption) {
output := outputFromSession(s)
renderer := lipgloss.NewRenderer(lipgloss.WithOutput(output))
return model{
detectedProfile: renderer.ColorProfile(),
renderer: renderer,
}, nil
}),
lm.Middleware(),
),
)
if err != nil {
log.Fatal(err)
}
log.Printf("Listening on %s", addr)
if err := s.ListenAndServe(); err != nil {
log.Fatal(err)
}
}
type model struct {
detectedProfile termenv.Profile
renderer *lipgloss.Renderer
}
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.KeyMsg:
switch msg.String() {
case "ctrl+c", "q":
return m, tea.Quit
}
}
return m, nil
}
func (m model) View() string {
s := strings.Builder{}
m.renderer.SetColorProfile(m.detectedProfile)
fmt.Fprintf(&s, "Detected Color Profile: %s\n", colorProfile(m.renderer.ColorProfile()))
// Color grid
fmt.Fprintf(&s, "%s\n", colors(m.renderer))
// Enforced color profile
m.renderer.SetColorProfile(termenv.TrueColor)
fmt.Fprintf(&s, "Enforce True Color\n")
// Color grid
fmt.Fprintf(&s, "%s\n", colors(m.renderer))
// Detect dark background
fmt.Fprintf(&s, "Has Dark Background: %v\n", m.renderer.HasDarkBackground())
return s.String()
}
func colors(r *lipgloss.Renderer) string {
colors := colorGrid(14, 8)
b := strings.Builder{}
for _, x := range colors {
for _, y := range x {
s := r.NewStyle(" ").Background(lipgloss.Color(y))
b.WriteString(s.String())
}
b.WriteRune('\n')
}
return b.String()
}
func colorGrid(xSteps, ySteps int) [][]string {
x0y0, _ := colorful.Hex("#F25D94")
x1y0, _ := colorful.Hex("#EDFF82")
x0y1, _ := colorful.Hex("#643AFF")
x1y1, _ := colorful.Hex("#14F9D5")
x0 := make([]colorful.Color, ySteps)
for i := range x0 {
x0[i] = x0y0.BlendLuv(x0y1, float64(i)/float64(ySteps))
}
x1 := make([]colorful.Color, ySteps)
for i := range x1 {
x1[i] = x1y0.BlendLuv(x1y1, float64(i)/float64(ySteps))
}
grid := make([][]string, ySteps)
for x := 0; x < ySteps; x++ {
y0 := x0[x]
grid[x] = make([]string, xSteps)
for y := 0; y < xSteps; y++ {
grid[x][y] = y0.BlendLuv(x1[x], float64(y)/float64(xSteps)).Hex()
}
}
return grid
}
func colorProfile(p termenv.Profile) string {
switch p {
case termenv.TrueColor:
return "True Color"
case termenv.ANSI256:
return "ANSI 256"
case termenv.ANSI:
return "ANSI"
case termenv.Ascii:
return "No Color"
default:
return "Unknown"
}
}
func max(a, b int) int {
if a > b {
return a
}
return b
}