[usb_gadget p08] Package the USB gadget framework for easy distribution.

tools/usb_gadget/server.py

Index: tools/usb_gadget/server.py
diff --git a/tools/usb_gadget/server.py b/tools/usb_gadget/server.py
index f9ccd9b372d7e7bc168a4dc19469bc1ef45b6e6c..9f237264213fdd5b04db69571f6bd12a5b2f48a0 100644
--- a/tools/usb_gadget/server.py
+++ b/tools/usb_gadget/server.py
@@ -5,11 +5,16 @@
 """WSGI application to manage a USB gadget.
 """
 
+import re
+import sys
+
 from tornado import httpserver
 from tornado import web
 
 import default_gadget
 
+VERSION_PATTERN = re.compile(r'.*usb_gadget-([a-z0-9]{32})\.zip')
+
 address = None
 chip = None
 claimed_by = None
@@ -27,6 +32,19 @@ def SwitchGadget(new_gadget):
   chip.Create(gadget)
 
 
+class VersionHandler(web.RequestHandler):
+
+  def get(self):
+    version = 'unpackaged'
+    for path in sys.path:
+      match = VERSION_PATTERN.match(path)
+      if match:
+        version = match.group(1)
+        break
+
+    self.write(version)
+
+
 class ClaimHandler(web.RequestHandler):
 
   def post(self):
@@ -69,6 +87,7 @@ class ReconnectHandler(web.RequestHandler):
 
 
 app = web.Application([
+    (r'/version', VersionHandler),
     (r'/claim', ClaimHandler),
     (r'/unclaim', UnclaimHandler),
     (r'/unconfigure', UnconfigureHandler),