From 1c247ef5576afe401be02e08b974824263f3d61b Mon Sep 17 00:00:00 2001
From: "Daniel M. Pelt" <D.M.Pelt@cwi.nl>
Date: Thu, 5 Mar 2015 15:40:23 +0100
Subject: Avoid Python recompilation during installation

---
 python/builder.py | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

(limited to 'python')

diff --git a/python/builder.py b/python/builder.py
index ddca795..cfdb7d1 100644
--- a/python/builder.py
+++ b/python/builder.py
@@ -41,9 +41,22 @@ try:
         usecuda=True
 except KeyError:
     pass
-cfg = open('astra/config.pxi','w')
-cfg.write('DEF HAVE_CUDA=' + str(usecuda) + "\n")
-cfg.close()
+
+cfgToWrite = 'DEF HAVE_CUDA=' + str(usecuda) + "\n"
+cfgHasToBeUpdated = True
+try:
+    cfg = open('astra/config.pxi','r')
+    cfgIn = cfg.read()
+    cfg.close()
+    if cfgIn==cfgToWrite:
+        cfgHasToBeUpdated = False
+except IOError:
+    pass
+
+if cfgHasToBeUpdated:
+    cfg = open('astra/config.pxi','w')
+    cfg.write(cfgToWrite)
+    cfg.close()
 
 cmdclass = { }
 ext_modules = [ ]
-- 
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