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package main
import (
"fmt"
"math/rand"
"os"
"strings"
"time"
"github.com/charmbracelet/bubbles/progress"
"github.com/charmbracelet/bubbles/spinner"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
type model struct {
packages []string
index int
width int
height int
spinner spinner.Model
progress progress.Model
done bool
}
var (
currentPkgNameStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("211"))
doneStyle = lipgloss.NewStyle().Margin(1, 2)
checkMark = lipgloss.NewStyle().Foreground(lipgloss.Color("42")).SetString("✓")
)
func newModel() model {
p := progress.New(
progress.WithDefaultGradient(),
progress.WithWidth(40),
progress.WithoutPercentage(),
)
s := spinner.New()
s.Style = lipgloss.NewStyle().Foreground(lipgloss.Color("63"))
return model{
packages: getPackages(),
spinner: s,
progress: p,
}
}
func (m model) Init() tea.Cmd {
return tea.Batch(downloadAndInstall(m.packages[m.index]), m.spinner.Tick)
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.WindowSizeMsg:
m.width, m.height = msg.Width, msg.Height
case tea.KeyMsg:
switch msg.String() {
case "ctrl+c", "esc", "q":
return m, tea.Quit
}
case installedPkgMsg:
pkg := m.packages[m.index]
if m.index >= len(m.packages)-1 {
// Everything's been installed. We're done!
m.done = true
return m, tea.Sequence(
tea.Printf("%s %s", checkMark, pkg), // print the last success message
tea.Quit, // exit the program
)
}
// Update progress bar
m.index++
progressCmd := m.progress.SetPercent(float64(m.index) / float64(len(m.packages)))
return m, tea.Batch(
progressCmd,
tea.Printf("%s %s", checkMark, pkg), // print success message above our program
downloadAndInstall(m.packages[m.index]), // download the next package
)
case spinner.TickMsg:
var cmd tea.Cmd
m.spinner, cmd = m.spinner.Update(msg)
return m, cmd
case progress.FrameMsg:
newModel, cmd := m.progress.Update(msg)
if newModel, ok := newModel.(progress.Model); ok {
m.progress = newModel
}
return m, cmd
}
return m, nil
}
func (m model) View() string {
n := len(m.packages)
w := lipgloss.Width(fmt.Sprintf("%d", n))
if m.done {
return doneStyle.Render(fmt.Sprintf("Done! Installed %d packages.\n", n))
}
pkgCount := fmt.Sprintf(" %*d/%*d", w, m.index, w, n)
spin := m.spinner.View() + " "
prog := m.progress.View()
cellsAvail := max(0, m.width-lipgloss.Width(spin+prog+pkgCount))
pkgName := currentPkgNameStyle.Render(m.packages[m.index])
info := lipgloss.NewStyle().MaxWidth(cellsAvail).Render("Installing " + pkgName)
cellsRemaining := max(0, m.width-lipgloss.Width(spin+info+prog+pkgCount))
gap := strings.Repeat(" ", cellsRemaining)
return spin + info + gap + prog + pkgCount
}
type installedPkgMsg string
func downloadAndInstall(pkg string) tea.Cmd {
// This is where you'd do i/o stuff to download and install packages. In
// our case we're just pausing for a moment to simulate the process.
d := time.Millisecond * time.Duration(rand.Intn(500)) //nolint:gosec
return tea.Tick(d, func(t time.Time) tea.Msg {
return installedPkgMsg(pkg)
})
}
func max(a, b int) int {
if a > b {
return a
}
return b
}
func main() {
if _, err := tea.NewProgram(newModel()).Run(); err != nil {
fmt.Println("Error running program:", err)
os.Exit(1)
}
}
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