fix :npm-module missing SHADOW_ENV

src/main/shadow/boot/npm_module.js

@@ -0,0 +1,20 @@
+$CLJS.SHADOW_ENV = (function() {
+    var env = {};
+
+    var loadedFiles = {};
+
+    env.setLoaded = function(name) {
+        loadedFiles[name] = true;
+    };
+
+    env.load = function(paths) {
+        // should never be called
+        throw new Error("SHADOW_ENV.load not supported!");
+    };
+
+    env.isLoaded = function(name) {
+        return loadedFiles[name] || false;
+    }
+
+    return env;
+})();

src/main/shadow/build/output.clj

@@ -421,6 +421,7 @@
        ;; set global back to actual global so things like setTimeout work
        "\ngoog.global = CLJS_GLOBAL;"
 
+       (slurp (io/resource "shadow/boot/npm_module.js"))
        (slurp (io/resource "shadow/build/targets/npm_module_goog_overrides.js"))
        "\nmodule.exports = $CLJS;\n"
        ))