show available included IFOs in CLI help

gwinc/__main__.py

@@ -7,13 +7,19 @@ from IPython.terminal.embed import InteractiveShellEmbed
 import logging
 logging.basicConfig(level=logging.INFO)
 
-from . import load_ifo
+from .ifo import available_ifos, load_ifo
 from . import plot_noise
 
 ##################################################
 
-description = """Plot GWINC noise budget for specified IFO
+description = """Plot GWINC noise budget for specified IFO.
 
+Available included IFOs: {}
+
+""".format(', '.join(["'{}'".format(ifo) for ifo in available_ifos()]))
+# for ifo in available_ifos():
+#     description += "  '{}'\n".format(ifo)
+description += """
 If the inspiral_range package is installed, various figures of merit
 can be calculated for the resultant spectrum with the --fom argument,
 e.g.:

gwinc/ifo/__init__.py

 import os
 import re
+import fnmatch
 import yaml
 import scipy
 import scipy.io
@@ -208,6 +209,14 @@ class Struct(object):
                 raise IOError("Unknown file type: {}".format(ext))
 
 
+def available_ifos():
+    """List available included IFO files"""
+    ifos = []
+    for f in os.listdir(os.path.dirname(__file__)):
+        if fnmatch.fnmatch(f, '*.yaml'):
+            ifos.append(f.split('.')[0])
+    return ifos
+
 
 def load_ifo(name_or_path):
     """Load IFO by name or from file.