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@@ -1,10 +1,84 @@
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-if defined?(Rake.application) && Rake.application && ENV["SKIP_AR_JDBC_RAKE_REDEFINES"].nil?
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-  jdbc_rakefile = File.dirname(__FILE__) + "/jdbc.rake"
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-  if Rake.application.lookup("environment")
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-    # rails tasks already defined; load the override tasks now
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-    load jdbc_rakefile
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-  else
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-    # rails tasks not loaded yet; load as an import
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-    Rake.application.add_import(jdbc_rakefile)
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+if defined?(namespace) && RUBY_PLATFORM =~ /java/ && ENV["SKIP_AR_JDBC_RAKE_REDEFINES"].nil?
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+  def redefine_task(*args, &block)
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+    task_name = Hash === args.first ? args.first.keys[0] : args.first
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+    existing_task = Rake.application.lookup task_name
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+    if existing_task
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+      class << existing_task; public :instance_variable_set; end
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+      existing_task.instance_variable_set "@prerequisites", FileList[]
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+      existing_task.instance_variable_set "@actions", []
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+    end
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+    task(*args, &block)
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+  end
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+
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+  namespace :db do
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+    redefine_task :create => :environment do
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+      create_database(ActiveRecord::Base.configurations[RAILS_ENV])
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+    end
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+
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+    def create_database(config)
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+      begin
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+        ActiveRecord::Base.establish_connection(config)
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+        ActiveRecord::Base.connection
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+      rescue
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+        begin 
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+          url = config['url']
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+          if url
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+            if url =~ /^(.*\/)/
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+              url = $1
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+            end
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+          end
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+
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+          ActiveRecord::Base.establish_connection(config.merge({'database' => nil, 'url' => url}))
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+          ActiveRecord::Base.connection.create_database(config['database'])
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+          ActiveRecord::Base.establish_connection(config)
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+        rescue
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+          if (config['driver'] || config['adapter']) =~ /postgr/
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+            `createdb "#{config['database']}" -E utf8`
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+          else 
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+            warn "couldn't create database #{config['database']}"
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+          end
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+        end
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+      end
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+    end
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+    
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+    redefine_task :drop => :environment do
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+      begin
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+        config = ActiveRecord::Base.configurations[environment_name]
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+        ActiveRecord::Base.establish_connection(config)
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+        db = ActiveRecord::Base.connection.database_name
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+        ActiveRecord::Base.connection.recreate_database(db)
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+      rescue
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+      end
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+    end
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+
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+    namespace :structure do
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+      redefine_task :dump => :environment do
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+        abcs = ActiveRecord::Base.configurations
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+        ActiveRecord::Base.establish_connection(abcs[RAILS_ENV])
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+        File.open("db/#{RAILS_ENV}_structure.sql", "w+") { |f| f << ActiveRecord::Base.connection.structure_dump }
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+        if ActiveRecord::Base.connection.supports_migrations?
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+          File.open("db/#{RAILS_ENV}_structure.sql", "a") { |f| f << ActiveRecord::Base.connection.dump_schema_information }
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+        end
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+      end
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+    end
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+    
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+    namespace :test do
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+      redefine_task :clone_structure => [ "db:structure:dump", "db:test:purge" ] do
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+        abcs = ActiveRecord::Base.configurations
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+        ActiveRecord::Base.establish_connection(:test)
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+        ActiveRecord::Base.connection.execute('SET foreign_key_checks = 0') if abcs["test"]["adapter"] =~ /mysql/i
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+        IO.readlines("db/#{RAILS_ENV}_structure.sql").join.split(";\n\n").each do |ddl|
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+          puts "****** Executing #{ddl} *******"
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+          ActiveRecord::Base.connection.execute(ddl)
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+        end
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+      end
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+
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+      redefine_task :purge => :environment do
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+        abcs = ActiveRecord::Base.configurations
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+        ActiveRecord::Base.establish_connection(:test)
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+        db = ActiveRecord::Base.connection.database_name
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+        ActiveRecord::Base.connection.recreate_database(db)
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+      end
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+    end
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   end
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 end