Catch Non Numeric versions

This patch just displays a better message than the default stack trace
but dose not try to fix the problem. A further patch will be created but
it effects versioneer so may take longer to land as it may need to go
via versioneer mainline.

1 files changed, 10 insertions, 1 deletions

diff --git a/buildstream/utils.py b/buildstream/utils.py
index 149ee7b90..943346689 100644
--- a/buildstream/utils.py
+++ b/buildstream/utils.py
@@ -484,7 +484,16 @@ def get_bst_version():
         raise UtilError("Your git repository has no tags - BuildStream can't "
                         "determine its version. Please run `git fetch --tags`.")
 
-    return (int(versions[0]), int(versions[1]))
+    try:
+        return (int(versions[0]), int(versions[1]))
+    except IndexError:
+        raise UtilError("Cannot detect Major and Minor parts of the version\n"
+                        "Version: {} not in XX.YY.whatever format"
+                        .format(__version__))
+    except ValueError:
+        raise UtilError("Cannot convert version to integer numbers\n"
+                        "Version: {} not in Integer.Integer.whatever format"
+                        .format(__version__))
 
 
 @contextmanager