refactor cfg as object

- now default type is 'nil', which is collapsed to flat config via
  Outputs#to_cfg

- if type is not 'nil' then name is automatically set if not set by
  model

- if name and type is set, separate file is created

- if name is not set, but type is set, outputs from type are collapsed
  as with 'nil' types

This model:
  cmd 'show ip cef' do |out|
    out.type = 'poop'
    out.name = false
    out
  end

  cmd 'show process cpu' do |out|
    out.type = 'poop'
    out.name = 'my_cpu'
    out
  end

  cmd 'show memory statistics' do |out|
    out.type = 'poop'
    out.name = false
    out
  end

  cmd 'show ip bgp summary' do |out|
    out.type = 'poop'
  end

Would produce git output:
[ytti@ytti.fi ~/.config/oxidized]% ls poop
bu.ip.fi  bu.ip.fi--cpu  bu.ip.fi--show_ip_bgp_summary
[ytti@ytti.fi ~/.config/oxidized]%

bu.ip.fi contains the collapsed stuff
bu.ip.fi--cpu is manually named
bu.ip.fi--show_ip_bgp_summary is automatically named

2 files changed, 3 insertions, 3 deletions

diff --git a/lib/oxidized/model/model.rb b/lib/oxidized/model/model.rb
index 3dd3f98..7258912 100644
--- a/lib/oxidized/model/model.rb
+++ b/lib/oxidized/model/model.rb
@@ -155,7 +155,7 @@ module Oxidized
       if output.class != Oxidized::String
         output = Oxidized::String.new output
       end
-      output.cmd = name
+      output.set_cmd(name)
       output
     end
 
diff --git a/lib/oxidized/model/outputs.rb b/lib/oxidized/model/outputs.rb
index 406f886..10015f8 100644
--- a/lib/oxidized/model/outputs.rb
+++ b/lib/oxidized/model/outputs.rb
@@ -3,7 +3,7 @@ module Oxidized
     class Outputs
 
       def to_cfg
-        type_to_str('cfg')
+        type_to_str(nil)
       end
 
       def type_to_str want_type
@@ -23,7 +23,7 @@ module Oxidized
       end
 
       def types
-        @outputs.map { |out| out.type }.uniq - ['cfg']
+        @outputs.map { |out| out.type }.uniq.compact
       end
 
       private