Added option for reproducible build

build.go

@@ -3,23 +3,37 @@
 package main
 
 import (
+	"flag"
 	"os"
 	"os/exec"
 	"strings"
 )
 
+var reproducible = flag.Bool("r", false, "If set, the build will remove local directories from the debug infos.")
+
 func main() {
+	flag.Parse()
+
 	env := os.Environ()
 	wd, err := os.Getwd()
 	if err != nil {
 		panic(err)
 	}
-	env = append(env, "GOPATH="+wd)
 
-	args := []string{"build"}
+	env = append(env, "GOPATH="+wd, "CGO_ENABLED=0")
 
-	if len(os.Args) == 2 {
+	args := []string{"build", "-ldflags=-s -w"}
-		target := os.Args[1]
+
+	if *reproducible {
+		args = append(args,
+			"-asmflags=all=-trimpath="+wd,
+			"-gcflags=all=-trimpath="+wd,
+			"-a",
+		)
+	}
+
+	if len(flag.Args()) == 1 {
+		target := flag.Arg(0)
 		targetParts := strings.Split(target, "/")
 		if len(targetParts) != 2 {
 			println("Invalid target specification. Example: windows/386")