From 35ff53c6b0a98f6376cca5f42ab96499e4b476b6 Mon Sep 17 00:00:00 2001
From: Thiago de Arruda <tpadilha84@gmail.com>
Date: Thu, 10 Apr 2014 15:51:44 -0300
Subject: Add `msgpack_rpc_dispatch`/metadata generator

This adds a lua script which parses the contents of 'api.h'. After the api is
parsed into a metadata table. After that, it will generate:

- A msgpack blob for the metadata table. This msgpack object contains everything
  scripting engines need to generate their own wrappers for the remote API.
- The `msgpack_rpc_dispatch` function, which takes care of validating msgpack
  requests, converting arguments to C types and passing control to the
  appropriate 'api.h' function. The result is then serialized back to msgpack
  and returned to the client.

This approach was used because:

- It automatically modifies `msgpack_rpc_dispatch` to reflect API changes.
- Scripting engines that generate remote call wrappers using the msgpack
  metadata will also adapt automatically to API changes
---
 src/CMakeLists.txt | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src')

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 48f656fad4..8e38839e24 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,27 @@
 include(CheckLibraryExists)
 
+if(DEFINED ENV{LUA_BINARY})
+  set(LUA_BIN $ENV{LUA_BINARY})
+else()
+  set(LUA_BIN ${DEPS_BIN_DIR}/luajit)
+endif()
+
+set(GENERATED_DIR ${PROJECT_BINARY_DIR}/src/auto)
+set(DISPATCH_GENERATOR ${PROJECT_SOURCE_DIR}/scripts/msgpack-gen.lua)
+set(API_HEADER ${PROJECT_SOURCE_DIR}/src/api.h)
+set(MSGPACK_RPC_HEADER ${PROJECT_SOURCE_DIR}/src/msgpack_rpc.h)
+set(MSGPACK_DISPATCH ${GENERATED_DIR}/msgpack_dispatch.c)
+
+file(MAKE_DIRECTORY ${GENERATED_DIR})
+
+add_custom_command(OUTPUT ${MSGPACK_DISPATCH}
+  COMMAND ${LUA_BIN} ${DISPATCH_GENERATOR} ${API_HEADER} ${MSGPACK_DISPATCH}
+  DEPENDS
+    ${API_HEADER}
+    ${MSGPACK_RPC_HEADER}
+    ${DISPATCH_GENERATOR}
+    )
+
 file( GLOB NEOVIM_SOURCES *.c )
 
 foreach(sfile ${NEOVIM_SOURCES})
@@ -11,6 +33,7 @@ endforeach()
 
 list(REMOVE_ITEM NEOVIM_SOURCES ${to_remove})
 list(APPEND NEOVIM_SOURCES "${PROJECT_BINARY_DIR}/config/auto/pathdef.c")
+list(APPEND NEOVIM_SOURCES "${MSGPACK_DISPATCH}")
 
 file( GLOB OS_SOURCES os/*.c )
 
-- 
cgit