Vendor psutils and remove neko

plugins/system/ps/net/net_darwin.go

@@ -0,0 +1,74 @@
+// +build darwin
+
+package net
+
+import (
+	"os/exec"
+	"strconv"
+	"strings"
+
+	"github.com/shirou/gopsutil/common"
+)
+
+func NetIOCounters(pernic bool) ([]NetIOCountersStat, error) {
+	out, err := exec.Command("/usr/sbin/netstat", "-ibdn").Output()
+	if err != nil {
+		return nil, err
+	}
+
+	lines := strings.Split(string(out), "\n")
+	ret := make([]NetIOCountersStat, 0, len(lines)-1)
+	exists := make([]string, 0, len(ret))
+
+	for _, line := range lines {
+		values := strings.Fields(line)
+		if len(values) < 1 || values[0] == "Name" {
+			// skip first line
+			continue
+		}
+		if common.StringContains(exists, values[0]) {
+			// skip if already get
+			continue
+		}
+		exists = append(exists, values[0])
+
+		base := 1
+		// sometimes Address is ommitted
+		if len(values) < 11 {
+			base = 0
+		}
+
+		parsed := make([]uint64, 0, 3)
+		vv := []string{
+			values[base+3], // PacketsRecv
+			values[base+4], // Errin
+			values[base+5], // Dropin
+		}
+		for _, target := range vv {
+			if target == "-" {
+				parsed = append(parsed, 0)
+				continue
+			}
+
+			t, err := strconv.ParseUint(target, 10, 64)
+			if err != nil {
+				return nil, err
+			}
+			parsed = append(parsed, t)
+		}
+
+		n := NetIOCountersStat{
+			Name:        values[0],
+			PacketsRecv: parsed[0],
+			Errin:       parsed[1],
+			Dropin:      parsed[2],
+		}
+		ret = append(ret, n)
+	}
+
+	if pernic == false {
+		return getNetIOCountersAll(ret)
+	}
+
+	return ret, nil
+}