Bug #832: Restore src/cloud/common/Configuration.rb

This reverts 7a530fb77c0334d36b4b2404fc09792e1444197b
(cherry picked from commit 9fc7f582e238110e2153bc9083c4345e0cb0417b)

install.sh

@@ -792,7 +792,8 @@ RUBY_OPENNEBULA_LIB_FILES="src/oca/ruby/OpenNebula/Host.rb \
 
 COMMON_CLOUD_LIB_FILES="src/cloud/common/CloudServer.rb \
                         src/cloud/common/CloudClient.rb \
-                        src/cloud/common/CloudAuth.rb"
+                        src/cloud/common/CloudAuth.rb \
+                        src/cloud/common/Configuration.rb"
 
 COMMON_CLOUD_CLIENT_LIB_FILES="src/cloud/common/CloudClient.rb"
 

src/cloud/common/Configuration.rb

@@ -0,0 +1,115 @@
+# -------------------------------------------------------------------------- #
+# Copyright 2002-2011, OpenNebula Project Leads (OpenNebula.org)             #
+#                                                                            #
+# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
+# not use this file except in compliance with the License. You may obtain    #
+# a copy of the License at                                                   #
+#                                                                            #
+# http://www.apache.org/licenses/LICENSE-2.0                                 #
+#                                                                            #
+# Unless required by applicable law or agreed to in writing, software        #
+# distributed under the License is distributed on an "AS IS" BASIS,          #
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
+# See the License for the specific language governing permissions and        #
+# limitations under the License.                                             #
+#--------------------------------------------------------------------------- #
+
+###############################################################################
+# The Configuration Class represents a simple configuration file for the
+# Cloud servers. It does not check syntax.
+###############################################################################
+class Configuration
+  
+    ###########################################################################
+    # Patterns to parse the Configuration File
+    ###########################################################################
+    
+    NAME_REG     =/[\w\d_-]+/
+    VARIABLE_REG =/\s*(#{NAME_REG})\s*=\s*/
+    
+    SIMPLE_VARIABLE_REG =/#{VARIABLE_REG}([^\[]+?)(#.*)?/
+    SINGLE_VARIABLE_REG =/^#{SIMPLE_VARIABLE_REG}$/
+    ARRAY_VARIABLE_REG  =/^#{VARIABLE_REG}\[(.*?)\]/m
+    
+    ###########################################################################
+    ###########################################################################
+
+    def initialize(file)
+        @conf=parse_conf(file)
+    end
+    
+    def add_configuration_value(key,value) 
+	    add_value(@conf,key,value)
+    end
+
+    def [](key)
+        @conf[key.to_s.upcase]
+    end
+
+    ###########################################################################
+    ###########################################################################
+
+private
+    
+    #
+    #
+    #
+    def add_value(conf, key, value)
+        if conf[key]
+            if !conf[key].kind_of?(Array)
+                conf[key]=[conf[key]]
+            end
+            conf[key]<<value
+        else
+            conf[key]=value
+        end
+    end
+    
+    #
+    #
+    #
+    def parse_conf(file)
+        conf_file=File.read(file)
+    
+        conf=Hash.new
+
+        conf_file.scan(SINGLE_VARIABLE_REG) {|m|
+            key=m[0].strip.upcase
+            value=m[1].strip
+        
+            # hack to skip multiline VM_TYPE values
+            next if %w{NAME TEMPLATE}.include? key.upcase
+        
+            add_value(conf, key, value)
+        }
+    
+        conf_file.scan(ARRAY_VARIABLE_REG) {|m|
+            master_key=m[0].strip.upcase
+                
+            pieces=m[1].split(',')
+        
+            vars=Hash.new
+            pieces.each {|p|
+                key, value=p.split('=')
+                vars[key.strip.upcase]=value.strip
+            }
+
+            add_value(conf, master_key, vars)
+        }
+
+        conf
+    end
+end
+
+
+#
+# Test program for the Configuration Parser
+#
+if $0 == __FILE__
+
+    require 'pp'
+
+    conf=Configuration.new('cloud.conf')
+    pp conf
+
+end