commit d962c87fe39c83c58bccceca60fce74f3b8d6c66
Author: M.Schirmer <fain.marcel@gmail.com>
Date:   Tue Sep 9 20:01:34 2025 +0200

    initial commit with AI Code

diff --git a/cmd/monitor/main.go b/cmd/monitor/main.go
new file mode 100644
index 0000000..7a58f27
--- /dev/null
+++ b/cmd/monitor/main.go
@@ -0,0 +1,82 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/cpu"
+	"github.com/shirou/gopsutil/v3/mem"
+)
+
+func isSupported() bool {
+	goos := os.Getenv("TMUX_SYSUSAGE_GOOS") // Debug/Override optional
+	if goos == "" {
+		goos = detectGOOS()
+	}
+	switch goos {
+	case "darwin":
+		return true
+	case "linux":
+		id := linuxID()
+		return id == "ubuntu" || id == "arch"
+	default:
+		return false
+	}
+}
+
+func detectGOOS() string {
+	// runtime.GOOS vermeiden, um Import minimal zu halten? Es ist Standard—nutzen wir.
+	// (Minimale Imports sind nice-to-have, aber runtime ist winzig.)
+	// Wir nehmen ihn doch, weil zuverlässig.
+	// → Ein einzelner Import mehr ist ok.
+	return runtimeGOOS()
+}
+
+//go:noinline
+func runtimeGOOS() string {
+	// kleiner Trick: getrennt, damit der Compiler runtime nicht inlined—irrelevant, aber clean.
+	return getGOOS()
+}
+
+//go:linkname getGOOS runtime.GOOS
+func getGOOS() string
+
+func linuxID() string {
+	f, err := os.Open("/etc/os-release")
+	if err != nil {
+		return ""
+	}
+	defer f.Close()
+	sc := bufio.NewScanner(f)
+	for sc.Scan() {
+		line := sc.Text()
+		if strings.HasPrefix(line, "ID=") {
+			val := strings.TrimPrefix(line, "ID=")
+			val = strings.Trim(val, `"`)
+			return strings.ToLower(val)
+		}
+	}
+	return ""
+}
+
+func main() {
+	if !isSupported() {
+		// Keine Ausgabe auf nicht unterstützten Systemen
+		return
+	}
+	// Kurze CPU-Stichprobe
+	values, err := cpu.Percent(400*time.Millisecond, false)
+	if err != nil || len(values) == 0 {
+		return
+	}
+	vm, err := mem.VirtualMemory()
+	if err != nil {
+		return
+	}
+	// Kompakte tmux-Ausgabe
+	fmt.Printf("CPU %.0f%% | RAM %.0f%%", values[0], vm.UsedPercent)
+}
+
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..b63f094
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,16 @@
+module gitea.mschirmer.com/m13r/cpu-mem-monitor
+
+go 1.25.1
+
+require github.com/shirou/gopsutil/v3 v3.24.5
+
+require (
+	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
+	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
+	github.com/shoenig/go-m1cpu v0.1.6 // indirect
+	github.com/tklauser/go-sysconf v0.3.12 // indirect
+	github.com/tklauser/numcpus v0.6.1 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..61e6f38
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,36 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-ole/go-ole v1.2.6 h1:/Fpf6oFPoeFik9ty7siob0G6Ke8QvQEuVcuChpwXzpY=
+github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
+github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 h1:6E+4a0GO5zZEnZ81pIr0yLvtUWk2if982qA3F3QD6H4=
+github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0/go.mod h1:zJYVVT2jmtg6P3p1VtQj7WsuWi/y4VnjVBn7F8KPB3I=
+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/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c h1:ncq/mPwQF4JjgDlrVEn3C11VoGHZN7m8qihwgMEtzYw=
+github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c/go.mod h1:OmDBASR4679mdNQnz2pUhc2G8CO2JrUAVFDRBDP/hJE=
+github.com/shirou/gopsutil/v3 v3.24.5 h1:i0t8kL+kQTvpAYToeuiVk3TgDeKOFioZO3Ztz/iZ9pI=
+github.com/shirou/gopsutil/v3 v3.24.5/go.mod h1:bsoOS1aStSs9ErQ1WWfxllSeS1K5D+U30r2NfcubMVk=
+github.com/shoenig/go-m1cpu v0.1.6 h1:nxdKQNcEB6vzgA2E2bvzKIYRuNj7XNJ4S/aRSwKzFtM=
+github.com/shoenig/go-m1cpu v0.1.6/go.mod h1:1JJMcUBvfNwpq05QDQVAnx3gUHr9IYF7GNg9SUEw2VQ=
+github.com/shoenig/test v0.6.4 h1:kVTaSd7WLz5WZ2IaoM0RSzRsUD+m8wRR+5qvntpn4LU=
+github.com/shoenig/test v0.6.4/go.mod h1:byHiCGXqrVaflBLAMq/srcZIHynQPQgeyvkvXnjqq0k=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tklauser/go-sysconf v0.3.12 h1:0QaGUFOdQaIVdPgfITYzaTegZvdCjmYO52cSFAEVmqU=
+github.com/tklauser/go-sysconf v0.3.12/go.mod h1:Ho14jnntGE1fpdOqQEEaiKRpvIavV0hSfmBq8nJbHYI=
+github.com/tklauser/numcpus v0.6.1 h1:ng9scYS7az0Bk4OZLvrNXNSAO2Pxr1XXRAPyjhIx+Fk=
+github.com/tklauser/numcpus v0.6.1/go.mod h1:1XfjsgE2zo8GVw7POkMbHENHzVg3GzmoZ9fESEdAacY=
+github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
+github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
+golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201204225414-ed752295db88/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..9a25492
--- /dev/null
+++ b/main.go
@@ -0,0 +1,111 @@
+// cmd/sysusage/main.go
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/cpu"
+	"github.com/shirou/gopsutil/v3/mem"
+)
+
+type Result struct {
+	CPUPercent float64 `json:"cpu_percent"`
+	RAMPercent float64 `json:"ram_percent"`
+}
+
+func sampleCPU(interval time.Duration, samples int) (float64, error) {
+	if samples <= 0 {
+		samples = 1
+	}
+	var sum float64
+	for i := 0; i < samples; i++ {
+		// cpu.Percent blockiert für "interval" und liefert die Auslastung in diesem Zeitfenster
+		values, err := cpu.Percent(interval, false)
+		if err != nil {
+			return 0, err
+		}
+		if len(values) == 0 {
+			return 0, fmt.Errorf("no cpu values returned")
+		}
+		sum += values[0]
+	}
+	return sum / float64(samples), nil
+}
+
+func readRAM() (float64, error) {
+	vm, err := mem.VirtualMemory()
+	if err != nil {
+		return 0, err
+	}
+	return vm.UsedPercent, nil
+}
+
+func main() {
+	var (
+		intervalStr string
+		samples     int
+		jsonOut     bool
+		watch       bool
+	)
+
+	flag.StringVar(&intervalStr, "interval", "1s", "Messintervall pro Stichprobe (z.B. 200ms, 1s, 2s)")
+	flag.IntVar(&samples, "samples", 1, "Anzahl der Stichproben (über das Intervall gemittelt)")
+	flag.BoolVar(&jsonOut, "json", false, "Ausgabe als JSON")
+	flag.BoolVar(&watch, "watch", false, "Kontinuierlich messen, bis Strg+C")
+	flag.Parse()
+
+	interval, err := time.ParseDuration(intervalStr)
+	if err != nil || interval <= 0 {
+		log.Fatalf("ungültiges -interval: %v", intervalStr)
+	}
+
+	printOnce := func() error {
+		cpuPct, err := sampleCPU(interval, samples)
+		if err != nil {
+			return fmt.Errorf("CPU-Messung fehlgeschlagen: %w", err)
+		}
+		ramPct, err := readRAM()
+		if err != nil {
+			return fmt.Errorf("RAM-Messung fehlgeschlagen: %w", err)
+		}
+
+		if jsonOut {
+			out := Result{CPUPercent: cpuPct, RAMPercent: ramPct}
+			enc := json.NewEncoder(stdoutNoHTMLEscape{})
+			enc.SetIndent("", "  ")
+			return enc.Encode(out)
+		}
+
+		fmt.Printf("CPU: %.1f%% | RAM: %.1f%%\n", cpuPct, ramPct)
+		return nil
+	}
+
+	if watch {
+		for {
+			if err := printOnce(); err != nil {
+				log.Fatal(err)
+			}
+			// Bei watch: zwischen den Zeilen kurz pausieren, damit die Ausgabe lesbar bleibt.
+			time.Sleep(250 * time.Millisecond)
+		}
+	} else {
+		if err := printOnce(); err != nil {
+			log.Fatal(err)
+		}
+	}
+}
+
+// stdoutNoHTMLEscape verhindert das HTML-Escaping des Standard-Encoders (nur Kosmetik für JSON)
+type stdoutNoHTMLEscape struct{}
+
+func (stdoutNoHTMLEscape) Write(p []byte) (int, error) { return fmt.Print(string(p)) }
+func (stdoutNoHTMLEscape) Encode(v any) error {
+	enc := json.NewEncoder(stdoutNoHTMLEscape{})
+	enc.SetEscapeHTML(false)
+	return enc.Encode(v)
+}
+
diff --git a/monitor b/monitor
new file mode 100755
index 0000000..a1c8845
Binary files /dev/null and b/monitor differ
diff --git a/plugin.tmux b/plugin.tmux
new file mode 100644
index 0000000..07c3894
--- /dev/null
+++ b/plugin.tmux
@@ -0,0 +1,12 @@
+# Binary bauen (still). Wenn go fehlt: überspringen
+run-shell "cd '#{plugin_path}' && GO111MODULE=on go mod tidy >/dev/null 2>&1 || true"
+run-shell "cd '#{plugin_path}' && GO111MODULE=on go build -ldflags='-s -w' -o bin.sysusage ./cmd/monitor >/dev/null 2>&1 || true"
+
+# tmux-Variable setzen: #{sysusage}
+set -g @sysusage_cmd '#{plugin_path}/bin.sysusage'
+set -g status-interval 2
+
+# Du kannst später im Theme einfach schreiben:
+#   set -g status-right "... #{sysusage} ..."
+set -g -F @sysusage '#(@sysusage_cmd)'
+