setup.py: Catch exception with OSTree < 2017.4

Fixes #58

1 files changed, 8 insertions, 5 deletions

diff --git a/setup.py b/setup.py
index 7fc8b6746..80b367cae 100755
--- a/setup.py
+++ b/setup.py
@@ -69,11 +69,14 @@ try:
 except:
     exit_ostree("OSTree not found")
 
-if OSTree.YEAR_VERSION < REQUIRED_OSTREE_YEAR or \
-   (OSTree.YEAR_VERSION == REQUIRED_OSTREE_YEAR and
-    OSTree.RELEASE_VERSION < REQUIRED_OSTREE_RELEASE):
-    exit_ostree("OSTree v{}.{} is too old."
-                .format(OSTree.YEAR_VERSION, OSTree.RELEASE_VERSION))
+try:
+    if OSTree.YEAR_VERSION < REQUIRED_OSTREE_YEAR or \
+       (OSTree.YEAR_VERSION == REQUIRED_OSTREE_YEAR and
+        OSTree.RELEASE_VERSION < REQUIRED_OSTREE_RELEASE):
+        exit_ostree("OSTree v{}.{} is too old."
+                    .format(OSTree.YEAR_VERSION, OSTree.RELEASE_VERSION))
+except AttributeError:
+    exit_ostree("OSTree is too old.")
 
 
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