add cross platform build

build/cross-platofrm-build.bash

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+package=$1
+if [[ -z "$package" ]]; then
+  echo "usage: $0 <package-name>"
+  exit 1
+fi
+package_split=(${package//\// })
+package_name=${package_split[-1]}
+
+platforms=("windows/amd64" "windows/386" "darwin/amd64")
+
+for platform in "${platforms[@]}"
+do
+    platform_split=(${platform//\// })
+    GOOS=${platform_split[0]}
+    GOARCH=${platform_split[1]}
+    output_name=$package_name'-'$GOOS'-'$GOARCH
+    if [ $GOOS = "windows" ]; then
+        output_name+='.exe'
+    fi
+
+    env GOOS=$GOOS GOARCH=$GOARCH go build -o $output_name $package
+    if [ $? -ne 0 ]; then
+        echo 'An error has occurred! Aborting the script execution...'
+        exit 1
+    fi
+done

flow.go

@@ -16,7 +16,7 @@ func init() {
 func main() {
 
 	APIURL := viper.GetString("APIURL")
-	version := "1.0"
+	version := "1.0" // get from build
 
 	gateway := gateway.CreateGateway(models.GRPC, APIURL)
 	rootCmd := cmd.NewCmdRoot(gateway, version)