set PYTHONPATH more safely

Signed-off-by: Konstantin Gizdov <kgizdov@gmail.com>

Author: kgizdov

.SRCINFO

@@ -1,7 +1,7 @@
 pkgbase = root
 	pkgdesc = C++ data analysis framework and interpreter from CERN.
 	pkgver = 6.06.08
-	pkgrel = 1
+	pkgrel = 2
 	url = http://root.cern.ch
 	arch = i686
 	arch = x86_64
@@ -40,7 +40,7 @@ pkgbase = root
 	sha256sums = 437ed0fb2c46d5ca8e37cc689f87dfe12429f6a243d4e5cf2d395a177de7e90f
 	sha256sums = e03fff4accf7cee4e7329b305f1e0df7bf804dbced08d52566af789bc77ea0b0
 	sha256sums = d566bc44f0df1915ac81c41b8ef7eff0d9fec8728533b00b9e654a2a4eff9af1
-	sha256sums = 71ed39f7e5a605a6a02e3d0ba79c997b8e7f02551898c27112eb78f07d9d8244
+	sha256sums = 9d1f8e7ad923cb5450386edbbce085d258653c0160419cdd6ff154542cc32bd7
 	sha256sums = b103d46705883590d9e07aafb890ec1150f63dc2ca5f40d67e6ebef49a6d0a32
 	sha256sums = 3c45b03761d5254142710b7004af0077f18efece7c95511910140d0542c8de8a
 	sha256sums = 55be51afce766acca6ddd8123518af47a5d43c826233a2267c2404b68b662aee

PKGBUILD

@@ -6,7 +6,7 @@
 
 pkgname=root
 pkgver=6.06.08
-pkgrel=1
+pkgrel=2
 pkgdesc='C++ data analysis framework and interpreter from CERN.'
 arch=('i686' 'x86_64')
 url='http://root.cern.ch'
@@ -52,7 +52,7 @@ sha256sums=('7cb836282014cce822ef589cad27811eb7a86d7fad45a871fa6b0e6319ec201a'
             '437ed0fb2c46d5ca8e37cc689f87dfe12429f6a243d4e5cf2d395a177de7e90f'
             'e03fff4accf7cee4e7329b305f1e0df7bf804dbced08d52566af789bc77ea0b0'
             'd566bc44f0df1915ac81c41b8ef7eff0d9fec8728533b00b9e654a2a4eff9af1'
-            '71ed39f7e5a605a6a02e3d0ba79c997b8e7f02551898c27112eb78f07d9d8244'
+            '9d1f8e7ad923cb5450386edbbce085d258653c0160419cdd6ff154542cc32bd7'
             'b103d46705883590d9e07aafb890ec1150f63dc2ca5f40d67e6ebef49a6d0a32'
             '3c45b03761d5254142710b7004af0077f18efece7c95511910140d0542c8de8a'
             '55be51afce766acca6ddd8123518af47a5d43c826233a2267c2404b68b662aee')

root.sh

@@ -1,5 +1,9 @@
 if [ $PYTHONPATH ]; then
-    export PYTHONPATH=$PYTHONPATH:/usr/lib/root;
+    if [[ ":$PYTHONPATH:" == *":/usr/lib/root:"* ]]; then
+        return 0;
+    else
+        export PYTHONPATH=$PYTHONPATH:/usr/lib/root;
+    fi
 else
     export PYTHONPATH=/usr/lib/root;
 fi