installation.md

@@ -83,5 +83,29 @@ cd uwglance/pyglance
 python setup.py develop
 ~~~~
 
+<h3>Installing Using HHG</h3>
 
+Please don't try to do this unless you already know what HHG is.
 
+Prerequisites:
+~~~~
+# make sure PYTHONPATH is not set in environment (remove from .bashrc / .bash_profile / etc)
+unset PYTHONPATH
+# check that SSEC SB3-hhg 2014Q1 is installed, should be r3 or newer.
+rpm -qa |grep shellb3-2014q1
+# make sure $HOME/opt exists
+mkdir -p $HOME/opt
+~~~~
+
+Installation uses 12M of disk space:
+~~~~
+# make a virtualenv to place glance in, using SB3-hhg as base runtime
+/opt/ShellB3/2014Q1/bin/virtualenv --system-site-packages $HOME/opt/glance.env
+# add latest glance to that virtualenv
+$HOME/opt/glance.env/bin/python -m easy_install -U -vi http://larch.ssec.wisc.edu/eggs/repos uwglance
+~~~~
+
+Usage:
+option 1) softlink "$HOME/opt/glance.env/bin/glance" into your PATH
+option 2) prepend "$HOME/opt/glance.env/bin" to your PATH
+option 3) "source $HOME/opt/glance.env/bin/activate", run glance, "deactivate" when done