initial commit

Makefile

@@ -0,0 +1,10 @@
+all: build
+
+build: statusline.go
+	go build statusline.go
+
+run:
+	go run statusline.go
+
+install:
+	go build -o ~/bin/statusline statusline.go

go.mod

@@ -0,0 +1,5 @@
+module go.fanir.de/statusline
+
+go 1.15
+
+require github.com/shirou/gopsutil/v3 v3.20.10

go.sum

@@ -0,0 +1,19 @@
+github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d h1:G0m3OIz70MZUWq3EgK3CesDbo8upS2Vm9/P3FtgI+Jk=
+github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-ole/go-ole v1.2.4 h1:nNBDSCOigTSiarFpYE9J/KtEA1IOW4CNeqT9TQDqCxI=
+github.com/go-ole/go-ole v1.2.4/go.mod h1:XCwSNxSkXRo4vlyPy93sltvi/qJq0jqQhjqQNIwKuxM=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/shirou/gopsutil/v3 v3.20.10 h1:7zomV9HJv6UGk225YtvEa5+camNLpbua3MAz/GqiVJY=
+github.com/shirou/gopsutil/v3 v3.20.10/go.mod h1:igHnfak0qnw1biGeI2qKQvu0ZkwvEkUcCLlYhZzdr/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/sys v0.0.0-20201024232916-9f70ab9862d5 h1:iCaAy5bMeEvwANu3YnJfWwI0kWAGkEa2RXPdweI/ysk=
+golang.org/x/sys v0.0.0-20201024232916-9f70ab9862d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

statusline.go

@@ -0,0 +1,108 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+	"strconv"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/load"
+	"github.com/shirou/gopsutil/v3/mem"
+)
+
+const warnFormat = "#[bg=colour208]"
+
+var binarySuffixes = []string{"B", "KiB", "MiB", "GiB", "TiB"}
+
+const binaryFactor = 1024
+
+func HBin(a uint64, precision int) string {
+	f := float64(a)
+	var suffix string
+	for _, suffix = range binarySuffixes {
+		if f < binaryFactor {
+			break
+		}
+		f /= binaryFactor
+	}
+	return fmt.Sprintf("%.*f%s", precision, f, suffix)
+}
+
+func usage() {
+	fmt.Fprintln(os.Stderr, "Usage:", os.Args[0], "<window_width>")
+	os.Exit(2)
+}
+
+func printLoad(precision int) {
+	l, err := load.Avg()
+	if err != nil {
+		panic(err) // fixme
+	}
+
+	if l.Load1 > float64(runtime.NumCPU()) {
+		fmt.Print(warnFormat)
+	}
+	fmt.Printf("[%.[1]*[2]f %.[1]*[3]f %.[1]*[4]f]",
+		precision, l.Load1, l.Load5, l.Load15)
+}
+
+func printMem(absolute, percent bool) {
+	if !(absolute || percent) {
+		return
+	}
+
+	v, err := mem.VirtualMemory()
+	if err != nil {
+		panic(err) //fixme
+	}
+
+	if v.UsedPercent > 90 {
+		fmt.Print(warnFormat, "[")
+	} else {
+		fmt.Print("#[default][")
+	}
+	if absolute {
+		fmt.Printf("%s/%s", HBin(v.Used, 1), HBin(v.Total, 1))
+		if percent {
+			fmt.Print(" ")
+		}
+	}
+	if percent {
+		fmt.Printf("%.0f%%", v.UsedPercent)
+	}
+	fmt.Print("]")
+}
+
+func printTime(format string) {
+	now := time.Now()
+
+	fmt.Print(now.Format("#[default]" + format))
+}
+
+func main() {
+	if len(os.Args) != 2 {
+		usage()
+	}
+	cols, err := strconv.Atoi(os.Args[1])
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		usage()
+	}
+
+	if cols >= 150 {
+		printLoad(2)
+		printMem(true, true)
+		printTime(" Mon 2006-01-02 15:04")
+	} else if cols >= 120 {
+		printLoad(2)
+		printMem(false, true)
+		printTime(" 15:04")
+	} else if cols >= 100 {
+		printLoad(0)
+		printMem(false, true)
+		printTime(" 15:04")
+	} else if cols >= 80 {
+		printTime("15:04")
+	}
+}