From e06eafcbf0784271f51c0936852d1e97c0ccce8b Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <lars.wirzenius@codethink.co.uk>
Date: Tue, 29 Jan 2013 13:50:46 +0000
Subject: Make yaml be an optional dependency

This can go away when we have made a release with yaml in it, and its
staging filler.
---
 morphlib/__init__.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'morphlib/__init__.py')

diff --git a/morphlib/__init__.py b/morphlib/__init__.py
index aba7a4d6..0f60642c 100644
--- a/morphlib/__init__.py
+++ b/morphlib/__init__.py
@@ -17,6 +17,19 @@
 '''Baserock library.'''
 
 
+# Import yaml if available. This can go away once Baserock has made a
+# release that includes yaml (also in its staging filler).
+try:
+    import yaml
+except ImportError:
+    got_yaml = False
+    class YAMLError(Exception):
+        pass
+else:
+    got_yaml = True
+    YAMLError = yaml.YAMLError
+
+
 import cliapp
 
 import gitversion
@@ -57,6 +70,7 @@ import stagingarea
 import stopwatch
 import tempdir
 import util
+
 import yamlparse
 
 import app  # this needs to be last
-- 
cgit v1.2.1