cumulus-util: Automatically set Python search path.

Attempt to set the Python library search path so that cumulus-util can find
the cumulus Python modules, without PYTHON_PATH having to be set
explicitly.

Modules are looked for in the "python" directory where the cumulus-util
binary resides; this is appropriate for running cumulus-util directly from
the source code directory, but may not be if the tools are installed
somewhere else.

diff --git a/cumulus-util b/cumulus-util
index 05043f1..ce80ff6 100755 (executable)
--- a/cumulus-util
+++ b/cumulus-util
@@ -4,6 +4,12 @@
 
 import getpass, os, stat, sys, time
 from optparse import OptionParser
+
+# Automatically set Python path, based on script directory.  This should be
+# removed if the tools are properly installed somewhere.
+script_directory = os.path.dirname(sys.argv[0])
+sys.path.append(os.path.join(script_directory, 'python'))
+
 import cumulus
 
 # Compatibility