fix(go/fib): ensure example consistency

Signed-off-by: Roman Volosatovs <[email protected]>

Go/fibonacci/Enarx.toml

@@ -0,0 +1,15 @@
+# Arguments
+args = [
+     "7",
+     "21"
+]
+
+# Pre-opened file descriptors
+[[files]]
+kind = "stdin"
+
+[[files]]
+kind = "stdout"
+
+[[files]]
+kind = "stderr"

Go/fibonacci/main.go

@@ -1,37 +1,45 @@
 package main
 
 import (
+	"bufio"
+	"flag"
 	"fmt"
-	"strconv"
+	"log"
 	"os"
+	"strconv"
 )
 
-func FibonacciSequence(n uint64) uint64 {
-    if n <= 1 {
-        return n
-    }
-    return FibonacciSequence(n-1) + FibonacciSequence(n-2)
+func init() {
+	log.SetFlags(0)
+}
+
+func fib(n uint64) uint64 {
+	if n <= 1 {
+		return n
+	}
+	return fib(n-1) + fib(n-2)
 }
 
-func main(){
-    if len(os.Args) > 1 {
-    	for _, arg := range os.Args[1:] {
-    		n, err := strconv.ParseUint(arg, 10, 64)
-    		if err != nil {
-				fmt.Fprintf(os.Stderr, "%s\n", err)
-				continue
-			}
-    		fmt.Printf("Fibonacci sequence number at index %d is %d\n" , n , FibonacciSequence(n));
-    	}
-    } else {
-    	var input string
-    	fmt.Print("Which Fibonacci index to find? ")
-    	fmt.Scanln(&input)
-		n, err := strconv.ParseUint(input, 10, 64)
+func main() {
+	flag.Parse()
+
+	args := flag.Args()
+	if len(args) == 0 {
+		fmt.Println("Enter a non-negative number:")
+		sc := bufio.NewScanner(os.Stdin)
+		sc.Scan()
+		b, err := sc.Bytes(), sc.Err()
+		if err != nil {
+			log.Fatal("Failed to read stdin: %s", err)
+		}
+		args = []string{string(b)}
+	}
+
+	for _, arg := range args {
+		n, err := strconv.ParseUint(arg, 10, 64)
 		if err != nil {
-			fmt.Fprintf(os.Stderr, "%s\n", err)
-			os.Exit(-1)
+			log.Fatalf("Failed to parse number: %s", err)
 		}
-		fmt.Printf("Fibonacci sequence number at index %d is %d\n" , n , FibonacciSequence(n));
-    }
+		fmt.Printf("Fibonacci sequence number at index %d is %d\n", n, fib(n))
+	}
 }

flake.nix

@@ -110,7 +110,7 @@
 
       fibonacci-go-wasm = final.stdenv.mkDerivation rec {
         pname = "fibonacci";
-        version = "0.1.0";
+        version = "0.2.0";
 
         src = "${self}/Go/fibonacci";
 
@@ -137,8 +137,7 @@
         name = final.fibonacci-go-wasm.pname;
 
         wasm = "${final.fibonacci-go-wasm}/bin/fibonacci.wasm";
-        # TODO: Read this from repo
-        conf = defaultConf final;
+        conf = "${self}/Go/fibonacci/Enarx.toml";
       };
 
       fibonacci-rust-wasm = naersk-lib.buildPackage {