Initial implementation of the hook feature

The current implementation is modular and allows users to define hooks
in several ways:
  * Use one of the built-in hook types (currently only 'exec')
  * Define their own Hook classes inside ~/.config/oxidized/hook

Exec hook type runs a user defined command with or without shell. It
populates a bunch of environment variables with metadata. The command
can either be run as synchronous or asynchronous. The default is
synchronous.

1 files changed, 10 insertions, 1 deletions

diff --git a/lib/oxidized/manager.rb b/lib/oxidized/manager.rb
index b4eaecd..bf28ae7 100644
--- a/lib/oxidized/manager.rb
+++ b/lib/oxidized/manager.rb
@@ -23,12 +23,13 @@ module Oxidized
         end
       end
     end
-    attr_reader :input, :output, :model, :source
+    attr_reader :input, :output, :model, :source, :hook
     def initialize
       @input  = {}
       @output = {}
       @model  = {}
       @source = {}
+      @hook = {}
     end
     def add_input method
       method = Manager.load Config::InputDir, method
@@ -53,5 +54,13 @@ module Oxidized
       return false if _source.empty?
       @source.merge! _source
     end
+    def add_hook _hook
+      return nil if @hook.key? _hook
+      name = _hook
+      _hook = Manager.load File.join(Config::Root, 'hook'), name
+      _hook = Manager.load Config::HookDir, name if _hook.empty?
+      return false if _hook.empty?
+      @hook.merge! _hook
+    end
   end
 end