1 files changed, 21 insertions, 2 deletions
diff --git a/setup.py b/setup.py
index 9ce4444..96c14b2 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,25 @@
-from setuptools import setup, find_packages
+import os
+import pkgutil
 import sys
-sys.path.insert(1, 'relic')
+from setuptools import setup, find_packages
+from subprocess import check_call, CalledProcessError
+
+
+if not pkgutil.find_loader('relic'):
+    relic_local = os.path.exists('relic')
+    relic_submodule = (relic_local and
+                       os.path.exists('.gitmodules') and
+                       not os.listdir('relic'))
+    try:
+        if relic_submodule:
+            check_call(['git', 'submodule', 'update', '--init', '--recursive'])
+        elif not relic_local:
+            check_call(['git', 'clone', 'https://github.com/spacetelescope/relic.git'])
+
+        sys.path.insert(1, 'relic')
+    except CalledProcessError as e:
+        print(e)
+        exit(1)
 
 import relic.release