From: Petteri Aimonen <jpa@git.mail.kapsi.fi>
Date: Sat, 19 May 2012 18:25:10 +0000 (+0300)
Subject: Add better error messages in the generator when libraries cannot be imported.
X-Git-Tag: 3.99.1~14^2~499
X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=commitdiff_plain;h=f9501ca18589ff7d1983a9d79400776062ae4b71;p=apps%2Flow-level-can-service.git

Add better error messages in the generator when libraries cannot be imported.
Fixes issue #5.
---

diff --git a/generator/nanopb_generator.py b/generator/nanopb_generator.py
index 2cc92f0..3915383 100644
--- a/generator/nanopb_generator.py
+++ b/generator/nanopb_generator.py
@@ -1,7 +1,27 @@
 '''Generate header file for nanopb from a ProtoBuf FileDescriptorSet.'''
 
-import google.protobuf.descriptor_pb2 as descriptor
-import nanopb_pb2
+try:
+    import google.protobuf.descriptor_pb2 as descriptor
+except:
+    print
+    print "*************************************************************"
+    print "*** Could not import the Google protobuf Python libraries ***"
+    print "*** Try installing package 'python-protobuf' or similar.  ***"
+    print "*************************************************************"
+    print
+    raise
+
+try:
+    import nanopb_pb2
+except:
+    print
+    print "***************************************************************"
+    print "*** Could not import the precompiled nanopb_pb2.py.         ***"
+    print "*** Run 'make' in the 'generator' folder to update the file.***"
+    print "***************************************************************"
+    print
+    raise
+
 import os.path
 
 # Values are tuple (c type, pb ltype)