feat: add motd-assist TUI for managing dynamic MOTDs
Initial Go project built with Bubble Tea and Lip Gloss: - Live preview and management of /etc/update-motd.d scripts - Embedded presets (ubuntu-default, minimal, server-dashboard) - Bundled POSIX sh style scripts (brand header, sysinfo panel, footer) - Snapshot/restore safety around applying changes - CLI subcommands preview, apply, restore, list-presets - Unit tests for detect, sanitize, and apply logic
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commit
d56659e21a
SSH key fingerprint:
SHA256:2pKKXDZucWvaF/GzXNz0FY53EAO1YDLN80bqS+TTz/o
34 changed files with 3260 additions and 0 deletions
336
internal/ui/view.go
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336
internal/ui/view.go
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@ -0,0 +1,336 @@
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package ui
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import (
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"fmt"
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"strings"
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"github.com/charmbracelet/lipgloss"
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"motd-assist/internal/motd"
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)
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// View rendert das komplette Layout: Preset- und Script-Pane oben,
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// Live-Vorschau unten, Statuszeile am unteren Rand.
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func (m Model) View() string {
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if !m.ready {
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return "motd-assist startet…"
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}
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switch m.mode {
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case modeHelp:
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return m.helpView()
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case modeSaveName:
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return m.saveView()
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}
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if m.err != nil {
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return m.errorView()
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}
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const statusH = 1
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previewH := max(6, (m.height-statusH)*2/5)
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topH := m.height - statusH - previewH
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if topH < 5 {
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topH = max(3, m.height-statusH-3)
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previewH = m.height - statusH - topH
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}
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presetsW := 26
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if m.width < 90 {
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presetsW = 22
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}
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scriptsW := m.width - presetsW - 1
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top := lipgloss.JoinHorizontal(lipgloss.Top,
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m.presetsView(presetsW, topH),
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" ",
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m.scriptsView(scriptsW, topH),
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)
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body := lipgloss.JoinVertical(lipgloss.Left,
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top,
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m.previewView(m.width, previewH),
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m.statusView(),
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)
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return body
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}
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func (m Model) presetsView(w, h int) string {
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inner := w - 4 // Rahmen (2) + Padding (2)
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var b strings.Builder
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b.WriteString(focusedTitle.Render("Presets"))
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b.WriteString("\n")
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visible := h - 3 // Rahmen (2) + Titel (1)
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start := 0
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if m.presetIdx >= visible {
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start = m.presetIdx - visible + 1
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}
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for i := start; i < len(m.presets) && i < start+visible; i++ {
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p := m.presets[i]
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cursor := " "
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name := truncate(p.Name, inner-5)
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if m.focus == panePresets && i == m.presetIdx {
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cursor = "▸ "
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b.WriteString(cursorStyle.Render(cursor + name))
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} else {
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b.WriteString(cursor + name)
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}
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if m.presetMatches[p.Name] {
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b.WriteString(" ")
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b.WriteString(goodStyle.Render("✓"))
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}
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b.WriteString("\n")
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}
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if len(m.presets) == 0 {
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b.WriteString(dimStyle.Render("(keine Presets)"))
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b.WriteString("\n")
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}
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return paneBox(m.focus == panePresets, w, h).Render(b.String())
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}
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func (m Model) scriptsView(w, h int) string {
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inner := w - 4
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var b strings.Builder
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title := "Scripte · /etc/update-motd.d"
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b.WriteString(focusedTitle.Render(truncate(title, inner)))
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b.WriteString("\n")
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markers := m.markersByRow()
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visible := h - 3
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start := 0
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if m.cursor >= visible {
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start = m.cursor - visible + 1
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}
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for i := start; i < len(m.working) && i < start+visible; i++ {
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b.WriteString(m.renderRow(m.working[i], markers[m.working[i].Name], inner, m.focus == paneScripts && i == m.cursor))
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b.WriteString("\n")
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}
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if len(m.working) == 0 {
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b.WriteString(dimStyle.Render("(leer)"))
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b.WriteString("\n")
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}
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return paneBox(m.focus == paneScripts, w, h).Render(b.String())
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}
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func (m Model) renderRow(r row, marker string, inner int, selected bool) string {
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var icon string
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switch {
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case r.Remove:
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icon = badStyle.Render("✕")
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case r.Enabled:
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icon = goodStyle.Render("●")
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default:
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icon = dimStyle.Render("○")
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}
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name := r.Name
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suffix := ""
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if r.Install != "" {
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suffix = " " + dimStyle.Render("+neu")
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} else if r.Bundled {
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suffix = " " + dimStyle.Render("·motd-assist")
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}
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if selected {
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name = cursorStyle.Render(name)
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} else if !r.Enabled && !r.Remove {
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name = dimStyle.Render(name)
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}
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line := icon + " " + name + suffix
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// Marker rechtsbündig, ohne ANSI-Breiten zu verreißen: Marker ist
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// gefärbt, daher Breite ohne Escape-Codes einplanen.
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markerPlain := marker
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markerW := len([]rune(markerPlain))
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used := lipgloss.Width(line)
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pad := inner - used - markerW - 1
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if pad < 0 {
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pad = 0
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}
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if marker != "" {
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style := warnStyle
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switch marker {
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case "neu", "an":
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style = goodStyle
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case "entfernt":
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style = badStyle
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default:
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style = dimStyle
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}
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line += strings.Repeat(" ", pad) + style.Render(marker)
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}
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return line
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}
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// markersByRow liefert die ausstehenden Änderungen pro Script-Name.
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func (m *Model) markersByRow() map[string]string {
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mk := make(map[string]string)
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plan := m.currentPlan()
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for _, op := range plan.Installs {
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if op.Enabled {
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mk[op.Name] = "neu"
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} else {
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mk[op.Name] = "neu (aus)"
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}
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}
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for _, op := range plan.Chmod {
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if op.Enable {
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mk[op.Name] = "an"
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} else {
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mk[op.Name] = "aus"
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}
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}
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for _, op := range plan.Renames {
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mk[op.From] = "→ " + op.To
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}
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for _, op := range plan.Removes {
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mk[op.Name] = "entfernt"
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}
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return mk
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}
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func (m Model) previewView(w, h int) string {
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inner := w - 4
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var title string
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switch {
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case m.applying:
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title = fmt.Sprintf("Live-Vorschau %s sudo läuft…", m.spinner.View())
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case m.previewBusy:
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title = fmt.Sprintf("Live-Vorschau %s aktualisiere…", m.spinner.View())
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default:
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if n := m.currentPlan().NumOps(); n > 0 {
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title = fmt.Sprintf("Live-Vorschau · %s (a: anwenden, esc: verwerfen)",
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warnStyle.Render(fmt.Sprintf("%d Änderungen ausstehend", n)))
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} else {
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title = "Live-Vorschau · " + goodStyle.Render("entspricht dem System")
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}
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}
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var content string
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if m.preview == "" {
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content = dimStyle.Render("(keine Ausgabe – Scripte aktivieren mit Leertaste)")
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} else {
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lines := strings.Split(m.preview, "\n")
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off := min(m.previewOff, max(0, len(lines)-1))
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end := off + h - 3
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if end > len(lines) {
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end = len(lines)
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}
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content = strings.Join(lines[off:end], "\n")
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}
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return paneBox(m.focus == panePreview, w, h).Render(
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truncateAnsi(title, inner) + "\n" + content,
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)
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}
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// truncateAnsi kürzt einen stilisierten Titel auf Anzeigebreite w.
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func truncateAnsi(s string, w int) string {
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if lipgloss.Width(s) <= w {
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return s
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}
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var b strings.Builder
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width := 0
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inEsc := false
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for _, r := range s {
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switch {
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case r == '\x1b':
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inEsc = true
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b.WriteRune(r)
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case inEsc:
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b.WriteRune(r)
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if r == 'm' {
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inEsc = false
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}
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default:
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if width >= w {
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continue
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}
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b.WriteRune(r)
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width++
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}
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}
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return b.String()
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}
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func (m Model) statusView() string {
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pam := warnStyle.Render("pam_motd ✗")
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if m.host.PAM {
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pam = goodStyle.Render("pam_motd ✓")
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}
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priv := warnStyle.Render("sudo nötig")
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if motd.IsRoot() {
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priv = goodStyle.Render("root")
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}
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enabled := 0
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for _, r := range m.working {
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if r.Enabled && !r.Remove {
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enabled++
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}
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}
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left := fmt.Sprintf("%s · %s · %s · %d/%d aktiv · %s",
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m.host.Hostname, m.host.Distro, pam, enabled, len(m.working), priv)
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line := statusStyle(left)
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if m.status != "" {
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line += statusStyle(" │ ") + statusStyle(m.status)
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}
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return lipgloss.NewStyle().MaxWidth(m.width).Render(line)
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}
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func statusStyle(s string) string {
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return lipgloss.NewStyle().Foreground(lipgloss.Color("250")).Render(s)
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}
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func (m Model) errorView() string {
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msg := lipgloss.NewStyle().
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Border(lipgloss.RoundedBorder()).
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BorderForeground(colorBad).
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Padding(1, 2).
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Width(min(60, m.width-4)).
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Render(
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badStyle.Render("MOTD-Verzeichnis nicht gefunden") + "\n\n" +
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m.err.Error() + "\n\n" +
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dimStyle.Render("motd-assist verwaltet /etc/update-motd.d (Ubuntu/Debian). "+
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"Auf diesem System liegt kein update-motd.d vor.") + "\n\n" +
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dimStyle.Render("q/esc: beenden · r: erneut versuchen"),
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)
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return lipgloss.Place(m.width, m.height, lipgloss.Center, lipgloss.Center, msg)
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}
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func (m Model) helpView() string {
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keys := [][2]string{
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{"tab / shift+tab", "Panes wechseln (Presets · Scripte · Vorschau)"},
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{"j / k, ↑ / ↓", "auswählen"},
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{"enter / space", "Preset laden · Script an/aus"},
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{"u / d", "Script in der Reihenfolge nach oben/unten"},
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{"a", "Änderungen anwenden (sudo-Passwortabfrage)"},
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{"esc", "Änderungen verwerfen"},
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{"s", "aktuellen Zustand als Preset speichern"},
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{"D", "ausgewähltes Preset löschen (nur eigene)"},
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{"r", "Systemzustand neu einlesen"},
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{"q", "beenden"},
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}
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var b strings.Builder
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b.WriteString(focusedTitle.Render("Hilfe") + "\n\n")
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for _, k := range keys {
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b.WriteString(cursorStyle.Render(fmt.Sprintf("%-20s", k[0])) + " " + k[1] + "\n")
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}
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b.WriteString("\n" + dimStyle.Render("Presets: ~/.config/motd-assist/presets · Undo: motd-assist restore"))
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box := lipgloss.NewStyle().
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Border(lipgloss.RoundedBorder()).
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BorderForeground(colorAccent).
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Padding(1, 2).
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Render(b.String())
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return lipgloss.Place(m.width, m.height, lipgloss.Center, lipgloss.Center, box)
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}
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func (m Model) saveView() string {
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box := lipgloss.NewStyle().
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Border(lipgloss.RoundedBorder()).
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BorderForeground(colorAccent).
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Padding(1, 2).
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Render(
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focusedTitle.Render("Preset speichern") + "\n\n" +
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m.input.View() + "\n\n" +
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helpStyle.Render("enter: speichern · esc: abbrechen"),
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)
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return lipgloss.Place(m.width, m.height, lipgloss.Center, lipgloss.Center, box)
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}
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