Merge pull request #85 from jhunkeler/relic-init-submodule

Consolidate relic initialization

setup.py

@@ -1,11 +1,29 @@
 #!/usr/bin/env python
+import os
+import pkgutil
 import sys
 from glob import glob
 from numpy import get_include as np_include
 from setuptools import setup, Extension
+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/jhunkeler/relic.git'])
+
+        sys.path.insert(1, 'relic')
+    except CalledProcessError as e:
+        print(e)
+        exit(1)
 
-# Use submodule
-sys.path.insert(1, 'relic')
 import relic.release  # noqa
 
 version = relic.release.get_info()