lnrpc: add new recursive proto generation script

In this commit, we add a recursive proto generation script. This avoids
having to add a new script for each upcoming sub-server.

lnrpc/gen_protos.sh

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+echo "Generating root gRPC server protos"
+
 # Generate the protos.
 protoc -I/usr/local/include -I. \
        -I$GOPATH/src \
@@ -7,8 +9,6 @@ protoc -I/usr/local/include -I. \
        --go_out=plugins=grpc:. \
        rpc.proto
 
-
-
 # Generate the REST reverse proxy.
 protoc -I/usr/local/include -I. \
        -I$GOPATH/src \
@@ -22,3 +22,16 @@ protoc -I/usr/local/include -I. \
        -I$GOPATH/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis \
        --swagger_out=logtostderr=true:. \
        rpc.proto
+
+# For each of the sub-servers, we then generate their protos, but a restricted
+# set as they don't yet require REST proxies, or swagger docs.
+for file in **/*.proto
+do
+    DIRECTORY=$(dirname ${file})
+    echo "Generating protos from ${file}, into ${DIRECTORY}"
+
+    protoc -I/usr/local/include -I. \
+           -I$GOPATH/src \
+           --go_out=plugins=grpc:. \
+           ${file}
+done