Ben Vin
016f93ab4f
Add a monorepo for small single-purpose CLI tools that share a common library, so tools reuse TUI primitives and Kubernetes client bootstrapping instead of duplicating them. - common/tui: direction markers, style palette, width-aware padding/layout - common/kube: in-cluster→kubeconfig client loading + core/metrics clients - podgap: live TUI comparing pod requests/limits vs actual usage, with up/down markers showing per-pod change since the last refresh - Makefile auto-discovers tool directories: make <tool> | all | install
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
// Package tui holds small, reusable terminal-UI primitives shared across the
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// tools in benvin-utils: direction markers, a common style palette, and
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// width-aware padding/truncation helpers that respect ANSI styling.
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package tui
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import (
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"strings"
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"github.com/charmbracelet/lipgloss"
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)
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// Shared style palette. Tools should prefer these so every benvin-utils TUI
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// looks consistent.
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var (
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Header = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("15")).Background(lipgloss.Color("240"))
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Title = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("87"))
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Dim = lipgloss.NewStyle().Foreground(lipgloss.Color("244"))
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Up = lipgloss.NewStyle().Foreground(lipgloss.Color("203")) // a rising value = red-ish
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Down = lipgloss.NewStyle().Foreground(lipgloss.Color("84")) // a falling value = green
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Hot = lipgloss.NewStyle().Foreground(lipgloss.Color("203")) // over threshold
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Warn = lipgloss.NewStyle().Foreground(lipgloss.Color("214")) // approaching threshold
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Err = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("203"))
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)
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// Marker glyphs for direction-of-change indicators.
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const (
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GlyphUp = "▲"
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GlyphDown = "▼"
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GlyphFlat = "·"
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)
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// Arrow renders a direction marker: 1 = up (▲), -1 = down (▼), 0 = flat (·).
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func Arrow(dir int) string {
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switch {
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case dir > 0:
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return Up.Render(GlyphUp)
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case dir < 0:
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return Down.Render(GlyphDown)
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default:
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return Dim.Render(GlyphFlat)
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}
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}
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// Sign reports whether d is positive (1), negative (-1), or zero (0). It is the
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// usual companion to Arrow when comparing a new sample against a previous one.
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func Sign[T int | int64 | float64](d T) int {
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switch {
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case d > 0:
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return 1
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case d < 0:
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return -1
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default:
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return 0
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}
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}
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// Pad right-pads plain (unstyled) text to width w, truncating if longer.
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func Pad(s string, w int) string {
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if len(s) > w {
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s = s[:w]
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}
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return s + strings.Repeat(" ", w-len(s))
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}
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// PadVisible right-pads a possibly ANSI-styled cell to width w using its visible
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// (rendered) width, so styled cells still align in a table.
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func PadVisible(s string, w int) string {
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if vis := lipgloss.Width(s); vis < w {
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return s + strings.Repeat(" ", w-vis)
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}
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return s
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}
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// Truncate shortens s to at most n runes, adding an ellipsis when it cuts.
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func Truncate(s string, n int) string {
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if n <= 0 {
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return ""
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}
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if len(s) <= n {
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return s
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}
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if n == 1 {
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return "…"
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}
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return s[:n-1] + "…"
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}
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