Adds gen-proto.sh script to scripts directory

gen-proto.sh generators protobuf files in grpc/ directory

Enables `make proto` to generate all protobuf files needed for grpc.

Makefile

@@ -39,3 +39,5 @@ snap:
 install:
 	cp build/bin/snapd /usr/local/bin/
 	cp build/bin/snapctl /usr/local/bin/
+proto:
+	cd $(GOPATH); bash -c "./src/github.com/intelsdi-x/snap/scripts/gen-proto.sh"

scripts/gen-proto.sh

@@ -0,0 +1,76 @@
+#!/bin/bash -e
+
+#http://www.apache.org/licenses/LICENSE-2.0.txt
+#
+#
+#Copyright 2016 Intel Corporation
+#
+#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.
+
+echo "Checking for proto"
+if ! which protoc > /dev/null
+then
+	echo "Error: protoc not installed" >&2
+	exit 1
+fi
+
+if ! protoc --version | grep 'libprotoc 3\.' > /dev/null
+then
+	echo "Error: this project requires protobuf 3" >&2
+	exit 1
+fi
+
+if ! which protoc-gen-go > /dev/null
+then
+	echo "Error: protoc-gen-go not installed. try : go get github.com/golang/protobuf/protoc-gen-go" >&2
+	exit 1
+fi
+
+proto_files=("grpc/controlproxy/rpc/control.proto")
+pb_go_files=("grpc/controlproxy/rpc/control.pb.go")
+
+license='/*
+http://www.apache.org/licenses/LICENSE-2.0.txt
+
+
+Copyright 2016 Intel Corporation
+
+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.
+*/
+'
+echo "Generating pb.go files"
+common_path="src/github.com/intelsdi-x/snap"
+#generate common
+echo "Generating common proto files"
+protoc --go_out=plugins.grpc:src/ --proto_path=src/ "$common_path"/grpc/common/*.proto
+echo "$license" | cat - "$common_path"/grpc/common/common.pb.go > temp && mv temp "$common_path"/grpc/common/common.pb.go
+#generate all others
+
+for i in "${!proto_files[@]}"
+do
+	file="${proto_files[$i]}"
+	pb="${pb_go_files[$i]}"
+	echo "Generating $pb"
+	protoc --go_out=plugins=grpc:src/ --proto_path=src/ "$common_path"/"$file"
+	echo "$license" | cat - "$common_path"/"$pb" > temp && mv temp "$common_path"/"$pb"
+done