libremidi: allow to let packagers specify how cppwinrt and winmidi headers come into play

Author: jcelerier

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.22 FATAL_ERROR)
 project(libremidi
-  VERSION 5.2.0
+  VERSION 5.3.0
   DESCRIPTION "A cross-platform MIDI library"
   LANGUAGES C CXX
   HOMEPAGE_URL "https://github.com/jcelerier/libremidi"
@@ -26,6 +26,11 @@ cmake_dependent_option(LIBREMIDI_NO_WINMIDI "Disable WinMIDI back-end" OFF "WIN3
 # if(LINUX) in CMake 3.25
 cmake_dependent_option(LIBREMIDI_NO_ALSA "Disable ALSA back-end" OFF "UNIX; NOT APPLE" OFF)
 cmake_dependent_option(LIBREMIDI_NO_UDEV "Disable udev support for ALSA" OFF "UNIX; NOT APPLE" OFF)
+cmake_dependent_option(LIBREMIDI_DOWNLOAD_CPPWINRT "Download cppwinrt and MIDI2 nupkgs" ON "WIN32" OFF)
+
+# https://github.com/microsoft/MIDI/releases/download/dev-preview-9-namm-4/Microsoft.Windows.Devices.Midi2.1.0.2-preview-9.250121-1820.nupkg renamed to .zip
+cmake_dependent_option(LIBREMIDI_WINMIDI_HEADERS_ZIP "Path to the WinMIDI headers archive" "" "WIN32" "")
+
 option(LIBREMIDI_NO_JACK "Disable JACK back-end" OFF)
 option(LIBREMIDI_NO_PIPEWIRE "Disable PipeWire back-end" OFF)
 option(LIBREMIDI_NO_NETWORK "Disable Network back-end" OFF)

cmake/libremidi.cppwinrt.cmake

@@ -44,7 +44,7 @@ find_path(CPPWINRT_PATH "winrt/base.h"
     ${WINSDK_LIST}
 )
 
-if(MSVC)
+if(MSVC AND LIBREMIDI_DOWNLOAD_CPPWINRT)
   if (NOT EXISTS "${CMAKE_WINDOWS_KITS_10_DIR}/Lib/${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION}.")
     message(FATAL_ERROR "Windows SDK not found. Install a Windows SDK and pass it to CMake with e.g.  -DCMAKE_GENERATOR_PLATFORM=x64,version=10.0.26100.0 -DCMAKE_SYSTEM_VERSION=10.0.26100.0")
   endif()

cmake/libremidi.winmidi.cmake

@@ -2,15 +2,22 @@ if(LIBREMIDI_NO_WINMIDI)
   return()
 endif()
 
-if(NOT EXISTS "${CMAKE_BINARY_DIR}/winmidi-headers.zip")
-  file(DOWNLOAD
-    https://github.com/microsoft/MIDI/releases/download/dev-preview-9-namm-4/Microsoft.Windows.Devices.Midi2.1.0.2-preview-9.250121-1820.nupkg
-    "${CMAKE_BINARY_DIR}/winmidi-headers.zip"
-  )
+if(LIBREMIDI_DOWNLOAD_CPPWINRT)
+  if(NOT EXISTS "${CMAKE_BINARY_DIR}/winmidi-headers.zip")
+    file(DOWNLOAD
+      https://github.com/microsoft/MIDI/releases/download/dev-preview-9-namm-4/Microsoft.Windows.Devices.Midi2.1.0.2-preview-9.250121-1820.nupkg
+      "${CMAKE_BINARY_DIR}/winmidi-headers.zip"
+    )
+  endif()
+  set(LIBREMIDI_WINMIDI_HEADERS_ZIP "${CMAKE_BINARY_DIR}/winmidi-headers.zip")
+endif()
+
+if(NOT LIBREMIDI_WINMIDI_HEADERS_ZIP)
+  return()
 endif()
 
 file(ARCHIVE_EXTRACT
-  INPUT "${CMAKE_BINARY_DIR}/winmidi-headers.zip"
+  INPUT "${LIBREMIDI_WINMIDI_HEADERS_ZIP}"
   DESTINATION "${CMAKE_BINARY_DIR}/winmidi-headers/"
 )
 
@@ -19,6 +26,7 @@ file(MAKE_DIRECTORY
 )
 
 file(REMOVE_RECURSE "${CMAKE_BINARY_DIR}/cppwinrt-winmidi/")
+
 if(CPPWINRT_TOOL)
   # Enumerate winmd IDL files and store them in a response file
   file(TO_CMAKE_PATH "${CMAKE_WINDOWS_KITS_10_DIR}/References/${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION}" winsdk)

include/libremidi/config.hpp

@@ -15,7 +15,7 @@
   #define LIBREMIDI_EXPORT
 #endif
 
-#define LIBREMIDI_VERSION "4.5.0"
+#define LIBREMIDI_VERSION "5.3.0"
 
 #if defined(LIBREMIDI_USE_BOOST)
   #if !__has_include(<boost/container/small_vector.hpp>)