roundup.demo: Use relative tracker home directory

Introduced in commit a0654b1283a4 when it was not known
that source demo.py is copied to roundup.demo during the
build phase. demo.py migrated to roundup.demo in the
previous commit.

Author: techtonik

CHANGES.txt

@@ -31,8 +31,8 @@ Fixed:
 - [minor] Template responsive: make demo.py work out of the box with it,
   by setting the static_files config.ini setting to "static". 
   Footer: link fixed and hardcoded last modfied date removed. (Bernhard Reiter)
-- demo.py tracker home is configurable, its location is printed and
-  the directory is fully erased when nuking (anatoly techtonik)
+- demo.py print location of tracker home and fully erase its directory
+  when nuking (anatoly techtonik)
 - demo.py changing hostname in config.ini actually changes the address
   where demo.py listens. (John Rouillard)
 

roundup/demo.py

@@ -15,7 +15,7 @@
 from roundup.scripts import roundup_server
 
 # Path where demo instance files will be stored
-TRACKER_HOME = os.path.join(os.path.dirname(__file__), 'demo')
+TRACKER_HOME = os.path.abspath('demo')
 
 def install_demo(home, backend, template):
     """Install a demo tracker
@@ -116,6 +116,8 @@ def install_demo(home, backend, template):
 
 def run_demo(home):
     """Run the demo tracker instance from its ``home`` directory"""
+    print "Demo Tracker Home:", home
+
     cfg = configuration.CoreConfig(home)
     url = cfg["TRACKER_WEB"]
     hostname, port = urlparse.urlparse(url)[1].split(':')