recipes to dump partition configuration or buildout section in json files

setup.py

@@ -127,6 +127,7 @@ setup(name=name,
           'ipv4toipv6 = slapos.recipe.6tunnel:FourToSix',
           'ipv6toipv4 = slapos.recipe.6tunnel:SixToFour',
           'java = slapos.recipe.java:Recipe',
+          'jsondump = slapos.recipe.jsondump:Recipe',
           'kumofs = slapos.recipe.kumofs:Recipe',
           'kvm = slapos.recipe.kvm:Recipe',
           'kvm.frontend = slapos.recipe.kvm_frontend:Recipe',
@@ -180,6 +181,7 @@ setup(name=name,
           'siptester = slapos.recipe.siptester:SipTesterRecipe',
           'slapconfiguration = slapos.recipe.slapconfiguration:Recipe',
           'slapconfiguration.serialised = slapos.recipe.slapconfiguration:Serialised',
+          'slapconfiguration.jsondump = slapos.recipe.slapconfiguration:JsonDump',
           'slapcontainer = slapos.recipe.container:Recipe',
           'slapmonitor = slapos.recipe.slapmonitor:MonitorRecipe',
           'slapmonitor-xml = slapos.recipe.slapmonitor:MonitorXMLRecipe',

slapos/recipe/jsondump.py

+
+import json
+import os
+
+class Recipe(object):
+    def __init__(self, buildout, name, options):
+        parameter_dict = {
+            key: value
+            for key, value in options.items()
+            if key not in ['json-output', 'recipe']
+        }
+
+        with os.fdopen(os.open(options['json-output'], os.O_WRONLY | os.O_CREAT | os.O_TRUNC, 0o600), 'w') as fout:
+            fout.write(json.dumps(parameter_dict, indent=2, sort_keys=True))
+            fout.close()
+
+    def install(self):
+        return []
+

slapos/recipe/slapconfiguration.py

@@ -24,6 +24,10 @@
 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #
 ##############################################################################
+
+import json
+import os
+
 import slapos.slap
 from slapos.recipe.librecipe import unwrap
 from ConfigParser import RawConfigParser
@@ -87,6 +91,15 @@ class Recipe(object):
   OPTCRE_match = RawConfigParser.OPTCRE.match
 
   def __init__(self, buildout, name, options):
+      parameter_dict = self.fetch_parameter_dict(options)
+
+      match = self.OPTCRE_match
+      for key, value in parameter_dict.iteritems():
+          if match(key) is not None:
+              continue
+          options['configuration.' + key] = value
+
+  def fetch_parameter_dict(self, options):
       slap = slapos.slap.slap()
       slap.initializeConnection(
           options['url'],
@@ -138,12 +151,7 @@ class Recipe(object):
           options['ipv6-random'] = list(ipv6_set)[0].encode('UTF-8')
 
       options['tap'] = tap_set
-      parameter_dict = self._expandParameterDict(options, parameter_dict)
-      match = self.OPTCRE_match
-      for key, value in parameter_dict.iteritems():
-          if match(key) is not None:
-              continue
-          options['configuration.' + key] = value
+      return self._expandParameterDict(options, parameter_dict)
 
   def _expandParameterDict(self, options, parameter_dict):
       options['configuration'] = parameter_dict
@@ -158,3 +166,10 @@ class Serialised(Recipe):
           return parameter_dict
       else:
           return {}
+
+class JsonDump(Recipe):
+  def __init__(self, buildout, name, options):
+    parameter_dict = self.fetch_parameter_dict(options)
+    with os.fdopen(os.open(options['json-output'], os.O_WRONLY | os.O_CREAT, 0600), 'w') as fout:
+      fout.write(json.dumps(parameter_dict, indent=2, sort_keys=True))
+