[FAB-1615] Configuration template proto and tool

https://jira.hyperledger.org/browse/FAB-1615

This changeset defines a proto to represent a configuration template.

It also defines a tool in the orderer directory to produce this template
for the orderer.

Change-Id: I3b14a81fcc73a37029f50a9ae0da08e5642d2f4f
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

orderer/tools/configtemplate/main.go

@@ -0,0 +1,58 @@
+/*
+Copyright IBM Corp. 2016 All Rights Reserved.
+
+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.
+*/
+
+package main
+
+import (
+	"flag"
+	"io/ioutil"
+
+	"github.com/hyperledger/fabric/common/flogging"
+	"github.com/hyperledger/fabric/orderer/common/bootstrap/provisional"
+	"github.com/hyperledger/fabric/orderer/localconfig"
+	cb "github.com/hyperledger/fabric/protos/common"
+	"github.com/hyperledger/fabric/protos/utils"
+
+	logging "github.com/op/go-logging"
+)
+
+var logger = logging.MustGetLogger("orderer/tools/baseconfig")
+
+const defaultOutputFile = "orderer.template"
+
+func main() {
+	var outputFile string
+	flag.StringVar(&outputFile, "outputFile", defaultOutputFile, "The file to write the configuration templatee to")
+	flag.Parse()
+
+	conf := config.Load()
+	flogging.InitFromSpec(conf.General.LogLevel)
+
+	logger.Debugf("Initializing generator")
+	generator := provisional.New(conf)
+
+	logger.Debugf("Producing template items")
+	templateItems := generator.TemplateItems()
+
+	logger.Debugf("Encoding configuration template")
+	outputData := utils.MarshalOrPanic(&cb.ConfigurationTemplate{
+		Items: templateItems,
+	})
+
+	logger.Debugf("Writing configuration to disk")
+	ioutil.WriteFile(outputFile, outputData, 0644)
+
+}

protos/common/configuration.proto

@@ -48,6 +48,13 @@ message ConfigurationEnvelope {
     repeated SignedConfigurationItem Items = 1;
 }
 
+// ConfigurationTemplate is used as a serialization format to share configuration templates
+// The orderer supplies a configuration template to the user to use when constructing a new
+// chain creation transaction, so this is used to facilitate that.
+message ConfigurationTemplate {
+    repeated ConfigurationItem Items = 1;
+}
+
 // This message may change slightly depending on the finalization of signature schemes for transactions
 message SignedConfigurationItem {
     bytes ConfigurationItem = 1;