Add simple example

examples/simple/nakefile.nim

@@ -0,0 +1,36 @@
+# Copyright 2017 Xored Software, Inc.
+
+import nake
+import os, ospaths, times
+import apigen.apigen
+
+proc cmdParams(): string =
+  let params = commandLineParams()
+  assert(params.len > 0)
+  result = params[1..<params.len].join(" ")
+
+proc genGodotApi() =
+  let godotBin = getEnv("GODOT_BIN")
+  if godotBin.isNil or godotBin.len == 0:
+    echo "GODOT_BIN environment variable is not set"
+    quit(-1)
+  if not fileExists(godotBin):
+    echo "Invalid GODOT_BIN path: " & godotBin
+    quit(-1)
+
+  const targetDir = "godotapi"
+  createDir(targetDir)
+  const jsonFile = "godotapi"/"api.json"
+  if not fileExists(jsonFile) or
+     godotBin.getLastModificationTime() > jsonFile.getLastModificationTime():
+    direShell(godotBin, "--gdnative-generate-json-api", jsonFile)
+    if not fileExists(jsonFile):
+      echo "Failed to generate api.json"
+      quit(-1)
+
+    genApi(targetDir, jsonFile)
+
+task "build", "Builds the client for the current platform":
+  genGodotApi()
+  withDir "src":
+    direShell("nimble", "make")