100 lines
1.9 KiB
Go
100 lines
1.9 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"os"
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"time"
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"github.com/shirou/gopsutil/v3/mem"
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)
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type Format struct {
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Default, Warning string
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}
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var defaultFormat = Format{}
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var tmuxFormat = Format{Default: "#[default]", Warning: "#[bg=colour208]"}
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var binarySuffixes = []string{"B", "KiB", "MiB", "GiB", "TiB"}
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const binaryFactor = 1024
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func HBin(a uint64, precision int) string {
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f := float64(a)
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var suffix string
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for _, suffix = range binarySuffixes {
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if f < binaryFactor {
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break
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}
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f /= binaryFactor
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}
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return fmt.Sprintf("%.*f%s", precision, f, suffix)
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}
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func printMem(format Format, absolute, percent bool) {
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if !(absolute || percent) {
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return
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}
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v, err := mem.VirtualMemory()
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if err != nil {
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panic(err) //fixme
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}
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if v.UsedPercent > 90 {
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fmt.Print(format.Warning, "[")
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} else {
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fmt.Print(format.Default, "[")
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}
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if absolute {
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fmt.Printf("%s/%s", HBin(v.Used, 1), HBin(v.Total, 1))
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if percent {
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fmt.Print(" ")
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}
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}
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if percent {
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fmt.Printf("%.0f%%", v.UsedPercent)
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}
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fmt.Print("]")
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}
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func printTime(format Format, timeFormat string) {
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now := time.Now()
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fmt.Print(format.Default, now.Format(timeFormat))
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}
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func main() {
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cols := flag.Uint("c", 0, "Window width in columns. 0 prints everything.")
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mode := flag.String("style", "none", "Include style directives in output. Valid values: none tmux")
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flag.Parse()
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format := defaultFormat
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switch *mode {
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case "", "none":
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case "tmux":
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format = tmuxFormat
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default:
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fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
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flag.PrintDefaults()
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os.Exit(2)
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}
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if *cols == 0 || *cols >= 150 {
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printLoad(format, 2)
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printMem(format, true, true)
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printTime(format, " Mon 2006-01-02 15:04")
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} else if *cols >= 120 {
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printLoad(format, 2)
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printMem(format, false, true)
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printTime(format, " 15:04")
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} else if *cols >= 100 {
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printLoad(format, 0)
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printMem(format, false, true)
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printTime(format, " 15:04")
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} else if *cols >= 80 {
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printTime(format, "15:04")
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}
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}
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