✨ Add cancellable spinner

cli/spin/spin.go

@@ -0,0 +1,58 @@
+package spin
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/charmbracelet/bubbles/spinner"
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+type model struct {
+	spinner  spinner.Model
+	text     string
+	quitting bool
+	err      error
+}
+
+type errMsg error
+
+func newModel(text string) model {
+	s := spinner.New()
+	s.Spinner = spinner.Dot
+	return model{spinner: s, text: text}
+}
+
+func (m model) Init() tea.Cmd {
+	return m.spinner.Tick
+}
+
+func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case errMsg:
+		m.err = msg
+		return m, nil
+
+	default:
+		var cmd tea.Cmd
+		m.spinner, cmd = m.spinner.Update(msg)
+		return m, cmd
+	}
+}
+
+func (m model) View() string {
+	if m.err != nil {
+		return m.err.Error()
+	}
+	str := fmt.Sprintf("%s %s\n", m.spinner.View(), m.text)
+	if m.quitting {
+		return str + "\n"
+	}
+	return str
+}
+
+func Spin(ctx context.Context, message string) error {
+	p := tea.NewProgram(newModel(message), tea.WithContext(ctx))
+	_, err := p.Run()
+	return err
+}