Add jQuery test runner and mach integration.

python/servo/command_base.py

@@ -121,6 +121,44 @@ class CommandBase(object):
             self._cargo_build_id = open(filename).read().strip()
         return self._cargo_build_id
 
+    def get_binary_path(self, release, dev):
+        base_path = path.join("components", "servo", "target")
+        release_path = path.join(base_path, "release", "servo")
+        dev_path = path.join(base_path, "debug", "servo")
+
+        # Prefer release if both given
+        if release and dev:
+            dev = False
+
+        release_exists = path.exists(release_path)
+        dev_exists = path.exists(dev_path)
+
+        if not release_exists and not dev_exists:
+            print("No Servo binary found. Please run './mach build' and try again.")
+            sys.exit()
+
+        if release and release_exists:
+            return release_path
+
+        if dev and dev_exists:
+            return dev_path
+
+        if not dev and not release and release_exists and dev_exists:
+            print("You have multiple profiles built. Please specify which "
+                  "one to run with '--release' or '--dev'.")
+            sys.exit()
+
+        if not dev and not release:
+            if release_exists:
+                return release_path
+            else:
+                return dev_path
+
+        print("The %s profile is not built. Please run './mach build%s' "
+              "and try again." % ("release" if release else "dev",
+                                   " --release" if release else ""))
+        sys.exit()
+
     def build_env(self, gonk=False, hosts_file_path=None):
         """Return an extended environment dictionary."""
         env = os.environ.copy()