plugins: (sys-stat) Fix bug causing command to hang after one run

plugins/sys-stats/sys-stats.go

@@ -2,18 +2,19 @@ package main
 
 import (
 	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+
 	"github.com/5HT2/taro-bot/bot"
 	"github.com/5HT2/taro-bot/cmd"
 	"github.com/5HT2/taro-bot/plugins"
 	cu "github.com/5HT2/taro-bot/util/cpu"
 	"github.com/mackerelio/go-osstat/cpu"
 	"github.com/mackerelio/go-osstat/memory"
 	"github.com/mackerelio/go-osstat/uptime"
-	"log"
-	"os"
-	"os/exec"
-	"strings"
-	"time"
 )
 
 var (
@@ -43,11 +44,11 @@ func SysStatsCommand(c bot.Command) error {
 	// If we have a running fetch command in this guild, cancel it
 	if quit, ok := runningFetches[c.E.GuildID.String()]; ok {
 		quit <- true
+	} else {
+		// Start a new quit channel
+		runningFetches[c.E.GuildID.String()] = make(chan bool)
 	}
 
-	// Start a new quit channel
-	runningFetches[c.E.GuildID.String()] = make(chan bool)
-
 	// Determine displayed shell based on
 	shell := "$"
 	if err := cmd.HasPermission(c, cmd.PermOperator); err == nil {