third-party: Add helper to fetch binary dependencies

Add cmake script with recipes to download binary dependencies, currently
the only dependency is win32yank.

third-party/CMakeLists.txt

@@ -120,6 +120,9 @@ set(LUV_SHA256 86a199403856018cd8e5529c8527450c83664a3d36f52d5253cbe909ea6c5a06)
 set(GPERF_URL http://ftp.gnu.org/pub/gnu/gperf/gperf-3.0.4.tar.gz)
 set(GPERF_SHA256 767112a204407e62dbc3106647cf839ed544f3cf5d0f0523aaa2508623aad63e)
 
+set(WIN32YANK_URL https://github.com/equalsraf/win32yank/releases/download/v0.0.2/win32yank.zip)
+set(WIN32YANK_SHA256 78869bf68565607cda1b6a3d549e2487d59d6f0f16f9b003e123c0086f90309d)
+
 if(USE_BUNDLED_UNIBILIUM)
   include(BuildUnibilium)
 endif()
@@ -164,6 +167,13 @@ if(USE_BUNDLED_GPERF)
   include(BuildGperf)
 endif()
 
+include(GetBinaryDeps)
+
+if(WIN32)
+  GetBinaryDep(TARGET win32yank
+    INSTALL_COMMAND ${CMAKE_COMMAND} -E copy win32yank.exe ${DEPS_INSTALL_DIR}/bin)
+endif()
+
 add_custom_target(clean-shared-libraries
   COMMAND ${CMAKE_COMMAND}
     -DREMOVE_FILE_GLOB=${DEPS_INSTALL_DIR}/lib/${CMAKE_SHARED_LIBRARY_PREFIX}*${CMAKE_SHARED_LIBRARY_SUFFIX}*

third-party/cmake/GetBinaryDeps.cmake

@@ -0,0 +1,46 @@
+# Download and install binary dependencies for windows
+include(CMakeParseArguments)
+
+# This is similar to the build recipes, but instead downloads a third party
+# binary and installs it under the the DEPS_PREFIX. The INSTALL_COMMAND is
+# executed in the folder where downloaded files are extracted and the
+# ${DEPS_INSTALL_DIR} holds the path to the third-party install root.
+function(GetBinaryDep)
+  cmake_parse_arguments(_gettool
+    "BUILD_IN_SOURCE"
+    "TARGET"
+    "INSTALL_COMMAND"
+    ${ARGN})
+
+  if(NOT _gettool_TARGET OR NOT _gettool_INSTALL_COMMAND)
+    message(FATAL_ERROR "Must pass INSTALL_COMMAND and TARGET")
+  endif()
+
+  string(TOUPPER "${_gettool_TARGET}_URL" URL_VARNAME)
+  string(TOUPPER "${_gettool_TARGET}_SHA256" HASH_VARNAME)
+  set(URL ${${URL_VARNAME}})
+  set(HASH ${${HASH_VARNAME}})
+  if(NOT URL OR NOT HASH )
+	  message(FATAL_ERROR "${URL_VARNAME} and ${HASH_VARNAME} must be set")
+  endif()
+
+  ExternalProject_Add(${_gettool_TARGET}
+    PREFIX ${DEPS_BUILD_DIR}
+    URL ${URL}
+    DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}
+    DOWNLOAD_COMMAND ${CMAKE_COMMAND}
+      -DPREFIX=${DEPS_BUILD_DIR}
+      -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}
+      -DURL=${URL}
+      -DEXPECTED_SHA256=${HASH}
+      -DTARGET=${_gettool_TARGET}
+      -DUSE_EXISTING_SRC_DIR=${USE_EXISTING_SRC_DIR}
+      -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
+    CONFIGURE_COMMAND ""
+    BUILD_IN_SOURCE 1
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ${CMAKE_COMMAND} -E make_directory ${DEPS_INSTALL_DIR}/bin
+		COMMAND "${_gettool_INSTALL_COMMAND}")
+  list(APPEND THIRD_PARTY_DEPS ${__gettool_TARGET})
+endfunction()