From 637f50d9bd35979ce72df93583f3a3508f57427e Mon Sep 17 00:00:00 2001
From: Elias Fleckenstein <eliasfleckenstein@web.de>
Date: Sun, 17 Apr 2022 19:55:04 +0200
Subject: [PATCH] Out of source builds: keep source directory clean

---
 .gitignore         |  6 +++---
 deps/protogen      |  2 +-
 src/CMakeLists.txt | 21 ++++++++++++---------
 src/mktypes.sh     | 10 ++++++++--
 src/version.cmake  |  6 ++----
 5 files changed, 26 insertions(+), 19 deletions(-)

diff --git a/.gitignore b/.gitignore
index 4eb449c..576b8e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,6 +25,6 @@ server.conf
 screenshot-*.png
 
 # Generated code
-src/version.h
-src/types.c
-src/types.h
+version.h
+types.c
+types.h
diff --git a/deps/protogen b/deps/protogen
index a7957f4..45b6912 160000
--- a/deps/protogen
+++ b/deps/protogen
@@ -1 +1 @@
-Subproject commit a7957f4abdccb075693b01713492cd67b881d1ec
+Subproject commit 45b691209c95e5a758536a32564c329683550dca
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e8d1b54..df59104 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -3,7 +3,7 @@ project(Dragonblocks)
 
 # Variables
 
-set(DEPS_DIR "${CMAKE_SOURCE_DIR}/../deps/")
+set(DEPS_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../deps/")
 
 if(NOT CMAKE_BUILD_TYPE)
 	set(CMAKE_BUILD_TYPE Debug)
@@ -38,7 +38,8 @@ link_libraries(
 )
 
 include_directories(SYSTEM ${DEPS_DIR})
-include_directories(BEFORE ${CMAKE_SOURCE_DIR})
+include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(BEFORE ${CMAKE_CURRENT_BINARY_DIR})
 
 # System specific options
 
@@ -55,6 +56,7 @@ endif()
 # Common sources
 
 set(COMMON_SOURCES
+	"${CMAKE_CURRENT_BINARY_DIR}/types.c"
 	"${DEPS_DIR}/asprintf/asprintf.c"
 	"${DEPS_DIR}/dragonnet/addr.c"
 	"${DEPS_DIR}/dragonnet/listen.c"
@@ -81,7 +83,6 @@ set(COMMON_SOURCES
 	perlin.c
 	physics.c
 	terrain.c
-	types.c
 )
 
 # Client
@@ -149,7 +150,8 @@ target_link_libraries(dragonblocks_server
 # Version
 
 add_custom_target(version
-	COMMAND ${CMAKE_COMMAND} -DSOURCE_DIR=${CMAKE_SOURCE_DIR} -P ${CMAKE_SOURCE_DIR}/version.cmake
+	COMMAND ${CMAKE_COMMAND} -DBINARY_DIR=${CMAKE_CURRENT_BINARY_DIR}  -P ${CMAKE_CURRENT_SOURCE_DIR}/version.cmake
+	WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
 )
 
 add_dependencies(dragonblocks version)
@@ -158,14 +160,15 @@ add_dependencies(dragonblocks_server version)
 # Types
 
 add_custom_command(
-	OUTPUT "${CMAKE_SOURCE_DIR}/types.c" "${CMAKE_SOURCE_DIR}/types.h"
-	COMMAND "${CMAKE_SOURCE_DIR}/mktypes.sh"
-	MAIN_DEPENDENCY "${CMAKE_SOURCE_DIR}/types.def"
-	WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+	OUTPUT types.c types.h
+	MAIN_DEPENDENCY types.def
+	DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/../deps/protogen/protogen.lua"
+	COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/mktypes.sh" "${CMAKE_CURRENT_SOURCE_DIR}"
+	WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
 )
 
 add_custom_target(types
-	DEPENDS "${CMAKE_SOURCE_DIR}/types.c" "${CMAKE_SOURCE_DIR}/types.h"
+	DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/types.c" "${CMAKE_CURRENT_BINARY_DIR}/types.h"
 )
 
 add_dependencies(dragonblocks types)
diff --git a/src/mktypes.sh b/src/mktypes.sh
index be1ef8f..3fb766d 100755
--- a/src/mktypes.sh
+++ b/src/mktypes.sh
@@ -1,3 +1,9 @@
-#!/bin/sh
-LUA_PATH="../deps/protogen/?.lua;../deps/protogen/?/init.lua" "../deps/protogen/protogen.lua"
+#!/bin/bash
+SOURCE_DIR="$1"
 
+if [[ "$SOURCE_DIR" = "" ]]; then
+	SOURCE_DIR="."
+fi
+
+export LUA_PATH="$SOURCE_DIR/../deps/protogen/?.lua;$SOURCE_DIR/../deps/protogen/?/init.lua"
+"$SOURCE_DIR/../deps/protogen/protogen.lua" "$SOURCE_DIR/types.def"
diff --git a/src/version.cmake b/src/version.cmake
index f6e2306..5befe41 100644
--- a/src/version.cmake
+++ b/src/version.cmake
@@ -10,9 +10,7 @@ if("${GIT_VERSION}" STREQUAL "")
 	)
 endif()
 
-set(VERSION_DEF "const char *version = \"${GIT_VERSION}\";")
-
 configure_file(
-	${SOURCE_DIR}/version.h.in
-	${SOURCE_DIR}/version.h
+	version.h.in
+	${BINARY_DIR}/version.h
 )
-- 
2.44.0