chore: monkey patch findBuildFile to use our angular-cli-build file.

lib/cli/index.js

@@ -1,6 +1,4 @@
 /*eslint-disable no-console */
-const cli = require('ember-cli/lib/cli');
-const path = require('path');
 
 // This file hooks up on require calls to transpile TypeScript.
 const fs = require('fs');
@@ -37,6 +35,38 @@ require.extensions['.ts'] = function(m, filename) {
 };
 
 
+/**
+ * Monkey patch `ember-cli/lib/utilities/find-build-file` to find our build
+ * file when looking for `ember-cli-build.js`. This needs to be the first
+ * thing that happens before we `require()` any ember files.
+ *
+ * TODO: Remove this hack and replace it with some configuration when/if we
+ *       move away from ember. Or when ember allows us to configure this in
+ *       an addon.
+ */
+const findBuildFileRequirePath = 'ember-cli/lib/utilities/find-build-file';
+const originalFindBuildFile = require(findBuildFileRequirePath);
+
+const mod = require.cache[require.resolve(findBuildFileRequirePath)];
+mod.exports = function patchedFindBuildFile(name) {
+  if (name == 'ember-cli-build.js') {
+    const result = originalFindBuildFile.call(this, 'angular-cli-build.js');
+
+    // Fallback to ember-cli-build if angular-cli-build isn't found.
+    if (result) {
+      return result;
+    }
+  }
+
+  return originalFindBuildFile.apply(this, arguments);
+};
+
+
+
+const cli = require('ember-cli/lib/cli');
+const path = require('path');
+
+
 module.exports = function(options) {
   const oldStdoutWrite = process.stdout.write;
   process.stdout.write = function (line) {