build/msvc: Add patch for LuaRocks

LuaRocks bundles an outdated wget.exe for downloading packages on Windows. It is too old to support GitHub's TLS, so this patch will replace it with curl.

third-party/cmake/BuildLuarocks.cmake

@@ -12,7 +12,7 @@ function(BuildLuarocks)
   cmake_parse_arguments(_luarocks
     ""
     ""
-    "CONFIGURE_COMMAND;BUILD_COMMAND;INSTALL_COMMAND"
+    "PATCH_COMMAND;CONFIGURE_COMMAND;BUILD_COMMAND;INSTALL_COMMAND"
     ${ARGN})
 
   if(NOT _luarocks_CONFIGURE_COMMAND AND NOT _luarocks_BUILD_COMMAND
@@ -32,6 +32,7 @@ function(BuildLuarocks)
       -DTARGET=luarocks
       -DUSE_EXISTING_SRC_DIR=${USE_EXISTING_SRC_DIR}
       -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
+    PATCH_COMMAND "${_luarocks_PATCH_COMMAND}"
     BUILD_IN_SOURCE 1
     CONFIGURE_COMMAND "${_luarocks_CONFIGURE_COMMAND}"
     BUILD_COMMAND "${_luarocks_BUILD_COMMAND}"
@@ -50,6 +51,11 @@ if(NOT MSVC)
   # version already knows, and passing them here breaks the build
   set(LUAROCKS_BUILDARGS CC=${HOSTDEPS_C_COMPILER} LD=${HOSTDEPS_C_COMPILER})
 endif()
+if(WIN32)
+  # Use our bundled curl.exe for downloading packages
+  set(LUAROCKS_BUILDARGS ${LUAROCKS_BUILDARGS} CURL=${DEPS_BIN_DIR}/curl.exe)
+endif()
+
 
 if(UNIX OR (MINGW AND CMAKE_CROSSCOMPILING))
 
@@ -76,7 +82,12 @@ elseif(MSVC OR MINGW)
   endif()
 
   # Ignore USE_BUNDLED_LUAJIT - always ON for native Win32
-  BuildLuarocks(INSTALL_COMMAND install.bat /FORCECONFIG /NOREG /NOADMIN /Q /F
+  BuildLuarocks(
+    PATCH_COMMAND
+      git -C ${DEPS_BUILD_DIR}/src/luarocks init
+      COMMAND git -C ${DEPS_BUILD_DIR}/src/luarocks apply
+        ${CMAKE_CURRENT_SOURCE_DIR}/patches/luarocks-Change-default-downloader-to-curl.patch
+    INSTALL_COMMAND install.bat /FORCECONFIG /NOREG /NOADMIN /Q /F
     /LUA ${DEPS_INSTALL_DIR}
     /LIB ${DEPS_LIB_DIR}
     /BIN ${DEPS_BIN_DIR}
@@ -88,6 +99,8 @@ elseif(MSVC OR MINGW)
     /LUAMOD ${DEPS_BIN_DIR}/lua)
 
   set(LUAROCKS_BINARY ${DEPS_INSTALL_DIR}/${LUAROCKS_VERSION}/luarocks.bat)
+  add_dependencies(luarocks wintools)
+
 else()
   message(FATAL_ERROR "Trying to build luarocks in an unsupported system ${CMAKE_SYSTEM_NAME}/${CMAKE_C_COMPILER_ID}")
 endif()

third-party/patches/luarocks-Change-default-downloader-to-curl.patch

@@ -0,0 +1,24 @@
+From 69313032fad04743c96bc8f2a029b691857488f9 Mon Sep 17 00:00:00 2001
+Date: Thu, 1 Mar 2018 21:41:29 -0600
+Subject: [PATCH] Change default downloader to curl
+
+---
+ install.bat | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/install.bat b/install.bat
+index 09cf9aa..76e4059 100644
+--- a/install.bat
++++ b/install.bat
+@@ -1037,7 +1037,7 @@ f:write(S[=[
+ site_config.LUAROCKS_UNAME_M=[[$UNAME_M]]
+ site_config.LUAROCKS_ROCKS_TREE=[[$TREE_ROOT]]
+ site_config.LUAROCKS_PREFIX=[[$PREFIX]]
+-site_config.LUAROCKS_DOWNLOADER=[[wget]]
++site_config.LUAROCKS_DOWNLOADER=[[curl]]
+ site_config.LUAROCKS_MD5CHECKER=[[md5sum]]
+ ]=])
+ if FORCE_CONFIG then
+-- 
+2.16.1.windows.4
+