[scripts] 'describe.py' can now be configured using a file

beat/backend/python/scripts/describe.py

@@ -27,6 +27,7 @@
 
 
 import sys
+import os
 import platform
 import collections
 import simplejson
@@ -36,14 +37,30 @@ def main():
 
   # resolve package name
   name = 'environment'
-  if len(sys.argv) > 1: name = sys.argv[1]
+  if len(sys.argv) > 1:
+    name = sys.argv[1]
 
   # resolve version
   version = '1'
-  if len(sys.argv) > 2: version = sys.argv[2]
+  if len(sys.argv) > 2:
+    version = sys.argv[2]
 
+  # use a configuration file if one exists
+  databases = None
+  if os.path.exists('/etc/beat/environment.json'):
+    with open('/etc/beat/environment.json', 'r') as config_file:
+      config = simplejson.load(config_file)
+      name = config.get('name', name)
+      version = config.get('version', version)
+      databases = config.get('databases', None)
+
+  # print the result
   retval = collections.OrderedDict()
   retval['name'] = name
   retval['version'] = version
   retval['os'] = platform.uname()
+
+  if databases is not None:
+    retval['databases'] = databases
+
   print(simplejson.dumps(retval, indent=2))