Fix crashes on missing config

We now merge user config with bootstrap config ensuring all configuratio
options are set even if not in configuratatin. Allowing us to add new
configuration options, without needing for users to touch their existing
configuration.

All default values are still written to user config when ever CFG.save
is called, which means when you change your output/input/source models
and configuration is missing, instead of just adding the configuration
needed for that particular module, it'll save full config to file.
Don't really think that is a bug, but might be something to fix later on
with maybe parameter to 'save'. Which would load user config, merge it
with 'save' argument level and save user config. But unless someone is
bothered by it, I won't do it.

This commit fixes #1

4 files changed, 10 insertions, 6 deletions

diff --git a/lib/oxidized/config/bootstrap.rb b/lib/oxidized/config/bootstrap.rb
index 73750de..4f9e2ab 100644
--- a/lib/oxidized/config/bootstrap.rb
+++ b/lib/oxidized/config/bootstrap.rb
@@ -10,7 +10,7 @@ module Oxidized
   CFG.threads  = 30
   CFG.timeout  = 5
   CFG.prompt   = /^([\w.@-]+[#>]\s?)$/
-  CFG.rest     = 8888
+  CFG.rest     = '0.0.0.0:8888'
   CFG.vars     = {
     :enable  => 'enablePW',
   }
@@ -30,5 +30,4 @@ module Oxidized
     'cisco'   => 'ios',
     'juniper' => 'junos',
   }
-  CFG.save
 end
diff --git a/lib/oxidized/config/core.rb b/lib/oxidized/config/core.rb
index c2cde58..9b93d91 100644
--- a/lib/oxidized/config/core.rb
+++ b/lib/oxidized/config/core.rb
@@ -11,17 +11,22 @@ module Oxidized
     # load config from file or bootstrap with built-ins
     def load
       if File.exists? @file
-        marshal_load YAML.load_file @file
+        cfg = YAML.load_file @file
+        marshal_load self.to_h.merge(cfg)
       else
-        require 'oxidized/config/bootstrap'
+        save
       end
     end
+    def defaults
+      require 'oxidized/config/bootstrap'
+    end
     # save config to file
     def save
       File.write @file, YAML.dump(marshal_dump)
     end
   end
   CFG = Config.new
+  CFG.defaults
   CFG.load
   Log.file = CFG.log if CFG.log
   Log.level = Logger::INFO unless CFG.debug
diff --git a/lib/oxidized/source/csv.rb b/lib/oxidized/source/csv.rb
index 6b08b18..cf73fc8 100644
--- a/lib/oxidized/source/csv.rb
+++ b/lib/oxidized/source/csv.rb
@@ -15,8 +15,8 @@ class CSV < Source
           :model => 1,
         }
       }
+      CFG.save
     end
-    CFG.save
   end
 
   def load
diff --git a/lib/oxidized/source/sql.rb b/lib/oxidized/source/sql.rb
index c563e15..385f632 100644
--- a/lib/oxidized/source/sql.rb
+++ b/lib/oxidized/source/sql.rb
@@ -18,8 +18,8 @@ class SQL < Source
           :model     => 'rancid',
         }
       }
+      CFG.save
     end
-    CFG.save
   end
 
   def load