[jhbuild] config: Set JHBUILD_PREFIX in environment

[Craig Keogh <cskeogh src gnome org>]

commit f52ee06486cb61e9e05bc62995cff6e045927187
Author: Colin Walters <walters verbum org>
Date:   Mon Jun 20 16:37:30 2011 -0400

    config: Set JHBUILD_PREFIX in environment
    
    This is useful for other tools to consume; for example, in my
    .bashrc, I want to show:
    
    [jhbuild=/src/build/jhbuild]
    
    Also, my "metabuild" tool will use it as a default for $prefix.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=653048

 jhbuild/config.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/jhbuild/config.py b/jhbuild/config.py
index 3826fc4..c7f875d 100644
--- a/jhbuild/config.py
+++ b/jhbuild/config.py
@@ -296,6 +296,8 @@ class Config:
             except:
                 raise FatalError(_('install prefix (%s) can not be created') % self.prefix)
 
+        os.environ['JHBUILD_PREFIX'] = self.prefix
+
         os.environ['UNMANGLED_LD_LIBRARY_PATH'] = os.environ.get('LD_LIBRARY_PATH', '')
 
         if not os.environ.get('DBUS_SYSTEM_BUS_ADDRESS'):