Add externs file for Node's use of promise_sqlite.

project.clj

@@ -29,6 +29,7 @@
                 :compiler
                 {
                  :elide-asserts  true
+                 :externs        ["src/node/externs.js"]
                  :hashbang       false
                  :language-in    :ecmascript5
                  :language-out   :ecmascript5
@@ -76,6 +77,7 @@
                {:source-paths ["src/node"]
                 :compiler
                 {
+                 :externs        ["src/node/externs.js"]
                  :language-in    :ecmascript5
                  :language-out   :ecmascript5
                  :output-dir     "target/advanced"

src/node/externs.js

@@ -0,0 +1,13 @@
+var sqlite = {};
+
+sqlite.DB = {};
+
+/**
+ * @return {Promise}
+ */
+sqlite.DB.open = function (path, options) {};
+
+var DBVal = {};
+DBVal.run = function (sql, bindings) {};
+DBVal.close = function () {};
+DBVal.each = function (sql, bindings, cb) {};