Add hiredis to build (#395)

* Add hiredis to build

* make hiredis build if ray has been cloned before this commit

.gitmodules

@@ -12,3 +12,6 @@
 	path = thirdparty/python
 	url = https://github.com/austinsc/python.git
 	ignore = dirty
+[submodule "thirdparty/hiredis"]
+	path = thirdparty/hiredis
+	url = https://github.com/redis/hiredis.git

CMakeLists.txt

@@ -117,6 +117,7 @@ link_libraries(${CMAKE_SOURCE_DIR}/thirdparty/grpc/libs/opt/libgrpc++_unsecure.a
                ${CMAKE_SOURCE_DIR}/thirdparty/grpc/libs/opt/libgrpc++.a
                ${CMAKE_SOURCE_DIR}/thirdparty/grpc/libs/opt/libgrpc.a
                ${CMAKE_SOURCE_DIR}/thirdparty/grpc/libs/opt/protobuf/libprotobuf.a
+               ${CMAKE_SOURCE_DIR}/thirdparty/hiredis/libhiredis.a
                pthread)
 
 if(UNIX AND NOT APPLE)

thirdparty/build_thirdparty.sh

@@ -36,3 +36,7 @@ make VERBOSE=1 -j$PARALLEL
 echo "building GRPC"
 cd $TP_DIR/grpc
 make static HAS_SYSTEM_PROTOBUF=false HAS_SYSTEM_ZLIB=false HAS_SYSTEM_OPENSSL_ALPN=false HAS_SYSTEM_OPENSSL_NPN=false -j$PARALLEL
+
+echo "building hiredis"
+cd $TP_DIR/hiredis
+make

thirdparty/download_thirdparty.sh

@@ -7,6 +7,7 @@ TP_DIR=$(cd "$(dirname "${BASH_SOURCE:-$0}")"; pwd)
 
 git submodule update --init --recursive -- "$TP_DIR/arrow"
 git submodule update --init --recursive -- "$TP_DIR/numbuf"
+git submodule update --init --recursive -- "$TP_DIR/hiredis"
 
 # this seems to be neeccessary for building on Mac OS X
 cd grpc