[pitivi] bin: Fix the script to enter xdg-app env

[Thibault Saunier <tsaunier src gnome org>]

commit dc007c745d0e7ffdeb73b6147fbec98e8e3ae891
Author: Thibault Saunier <tsaunier gnome org>
Date:   Fri Apr 22 19:00:42 2016 -0300

    bin: Fix the script to enter xdg-app env
    
    We had some variable mixups
    
    Differential Revision: https://phabricator.freedesktop.org/D950

 build/xdg-app/enter_env |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/build/xdg-app/enter_env b/build/xdg-app/enter_env
index 9d36ca1..e256ec2 100755
--- a/build/xdg-app/enter_env
+++ b/build/xdg-app/enter_env
@@ -1,12 +1,14 @@
 #!/bin/sh
 
+PITIVI_DIR=$(dirname $(realpath $0))/../../
+echo $PITIVI_DIR
 function generate_path_and_completion_calls {
-  echo "export PATH=$GITREPO/bin/:\$PATH"
+  echo "export PATH=$PITIVI_DIR/bin/:\$PATH"
   echo "export CC='ccache gcc'"
   echo "export CXX='ccache g++'"
 }
 
-RCFILE=$GITREPO/.bashrc
+RCFILE=$PITIVI_DIR/.bashrc
 cp ~/.bashrc $RCFILE
 echo "export PS1=[ptv]\ \$PS1" >> $RCFILE
 echo "export PITIVI_DEVELOPMENT=1" >> $RCFILE
@@ -19,8 +21,7 @@ then
   echo "Entering own built environment"
   echo "=============================="
 
-  GITREPO="$(git rev-parse --show-toplevel)"
-  cd $GITREPO
+  cd $PITIVI_DIR
   bash --rcfile $RCFILE
 else
   $*