Make pprof optional to halve the binary size

Makefile

@@ -16,6 +16,11 @@ server:
 	go build -ldflags "-X main.version=${version}" ./cmd/ck-server
 	mv ck-server* ./build
 
+server_pprof: 
+	mkdir -p build
+	go build -ldflags "-X main.version=${version}" -tags pprof ./cmd/ck-server
+	mv ck-server* ./build
+
 install:
 	mv build/ck-* /usr/local/bin
 

cmd/ck-server/ck-server.go

@@ -8,10 +8,7 @@ import (
 	"io"
 	"log"
 	"net"
-	"net/http"
-	_ "net/http/pprof"
 	"os"
-	"runtime"
 	"strings"
 	"time"
 
@@ -237,11 +234,7 @@ func main() {
 		}
 
 		if *pprofAddr != "" {
-			runtime.SetBlockProfileRate(5)
-			go func() {
-				log.Println(http.ListenAndServe(*pprofAddr, nil))
-			}()
-			log.Println("pprof listening on " + *pprofAddr)
+			startPprof(*pprofAddr)
 		}
 
 		if *localAddr == "" {

cmd/ck-server/pprof.go

@@ -0,0 +1,9 @@
+// +build !pprof
+
+package main
+
+import "log"
+
+func startPprof(x string) {
+	log.Println("pprof not available in release builds to reduce binary size")
+}

cmd/ck-server/pprof_debug.go

@@ -0,0 +1,18 @@
+// +build pprof
+
+package main
+
+import (
+	"log"
+	"net/http"
+	_ "net/http/pprof"
+	"runtime"
+)
+
+func startPprof(pprofAddr string) {
+	runtime.SetBlockProfileRate(5)
+	go func() {
+		log.Println(http.ListenAndServe(pprofAddr, nil))
+	}()
+	log.Println("pprof listening on " + pprofAddr)
+}