First implementation

vendor/github.com/cyrilix/robocar-base/cli/cli.go

@@ -0,0 +1,30 @@
+package cli
+
+import (
+	"log"
+	"os"
+	"strconv"
+)
+
+func SetDefaultValueFromEnv(value *string, key string, defaultValue string) {
+	if os.Getenv(key) != "" {
+		*value = os.Getenv(key)
+	} else {
+		*value = defaultValue
+	}
+}
+func SetIntDefaultValueFromEnv(value *int, key string, defaultValue int) error {
+	var sVal string
+	if os.Getenv(key) != "" {
+		sVal = os.Getenv(key)
+		val, err := strconv.Atoi(sVal)
+		if err != nil {
+			log.Printf("unable to convert string to int: %v", err)
+			return err
+		}
+		*value = val
+	} else {
+		*value = defaultValue
+	}
+	return nil
+}