make+mobile: define gen_bindings.sh

gen_bindings uses falafel to generate Go bindings from the lnrpc
protos.

Makefile

@@ -170,6 +170,10 @@ rpc:
 	@$(call print, "Compiling protos.")
 	cd ./lnrpc; ./gen_protos.sh
 
+mobile-rpc:
+	@$(call print, "Creating mobile RPC from protos.")
+	cd ./mobile; ./gen_bindings.sh
+
 clean:
 	@$(call print, "Cleaning source.$(NC)")
 	$(RM) ./lnd-debug ./lncli-debug
@@ -199,4 +203,5 @@ clean:
 	lint \
 	list \
 	rpc \
+	mobile-rpc \
 	clean

mobile/gen_bindings.sh

@@ -0,0 +1,64 @@
+#!/bin/sh
+
+mkdir -p build
+
+# Check falafel version.
+falafelVersion="0.5"
+falafel=$(which falafel)
+if [ $falafel ]
+then
+        version=$($falafel -v)
+        if [ $version != $falafelVersion ]
+        then
+                echo "falafel version $falafelVersion required"
+                exit 1
+        fi
+        echo "Using plugin $falafel $version"
+else
+        echo "falafel not found"
+        exit 1
+fi
+
+pkg="lndmobile"
+target_pkg="github.com/lightningnetwork/lnd/lnrpc"
+
+# Generate APIs by passing the parsed protos to the falafel plugin.
+opts="package_name=$pkg,target_package=$target_pkg,listeners=lightning=lightningLis walletunlocker=walletUnlockerLis,mem_rpc=1"
+protoc -I/usr/local/include -I. \
+       -I$GOPATH/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis \
+       --plugin=protoc-gen-custom=$falafel\
+       --custom_out=./build \
+       --custom_opt="$opts" \
+       --proto_path=../lnrpc \
+       rpc.proto
+
+# If prefix=1 is specified, prefix the generated methods with subserver name.
+# This must be enabled to support subservers with name conflicts.
+use_prefix="0"
+if [[ $prefix = "1" ]]
+then
+    echo "Prefixing methods with subserver name"
+    use_prefix="1"
+fi
+
+# Find all subservers.
+for file in ../lnrpc/**/*.proto
+do
+    DIRECTORY=$(dirname ${file})
+    tag=$(basename ${DIRECTORY})
+    build_tags="// +build $tag"
+    lis="lightningLis"
+
+    opts="package_name=$pkg,target_package=$target_pkg/$tag,build_tags=$build_tags,api_prefix=$use_prefix,defaultlistener=$lis"
+
+    echo "Generating mobile protos from ${file}, with build tag ${tag}"
+
+    protoc -I/usr/local/include -I. \
+           -I$GOPATH/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis \
+           -I../lnrpc \
+           --plugin=protoc-gen-custom=$falafel \
+           --custom_out=./build \
+           --custom_opt="$opts" \
+           --proto_path=${DIRECTORY} \
+           ${file}
+done