win: Terminal UI #6315

For CI builds unibilium is provided through msys2 packages, and
libtermkey is built from source in third-party from equalsraf/libtermkey.

In Windows we cannot read terminal input from the stdin file descriptor,
instead use libuv's uv_tty API. It should handle key input and encoding.

The UI suspend is not implemented for Windows, because the
SIGSTP/SIGCONT do not exist in windows. Currently this is a NOOP.

Closes #3902
Closes #6640

third-party/CMakeLists.txt

@@ -105,8 +105,13 @@ set(LUAROCKS_SHA256 cae709111c5701235770047dfd7169f66b82ae1c7b9b79207f9df0afb722
 set(UNIBILIUM_URL https://github.com/mauke/unibilium/archive/v1.2.0.tar.gz)
 set(UNIBILIUM_SHA256 623af1099515e673abfd3cae5f2fa808a09ca55dda1c65a7b5c9424eb304ead8)
 
+if(WIN32)
+set(LIBTERMKEY_URL https://github.com/equalsraf/libtermkey/archive/tb-windows.zip)
+set(LIBTERMKEY_SHA256 c81e33e38662b151a49847ff4feef4f8c4b2a66f3e159a28b575cbc9bcd8ffea)
+else()
 set(LIBTERMKEY_URL http://www.leonerd.org.uk/code/libtermkey/libtermkey-0.19.tar.gz)
 set(LIBTERMKEY_SHA256 c505aa4cb48c8fa59c526265576b97a19e6ebe7b7da20f4ecaae898b727b48b7)
+endif()
 
 set(LIBVTERM_URL https://github.com/neovim/libvterm/archive/a9c7c6fd20fa35e0ad3e0e98901ca12dfca9c25c.tar.gz)
 set(LIBVTERM_SHA256 1a4272be91d9614dc183a503786df83b6584e4afaab7feaaa5409f841afbd796)

third-party/cmake/BuildLibtermkey.cmake

@@ -1,21 +1,41 @@
-if(WIN32)
-  message(STATUS "Building libtermkey in Windows is not supported (skipping)")
-  return()
-endif()
 find_package(PkgConfig REQUIRED)
 
+if(WIN32)
 ExternalProject_Add(libtermkey
   PREFIX ${DEPS_BUILD_DIR}
   URL ${LIBTERMKEY_URL}
   DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/libtermkey
   DOWNLOAD_COMMAND ${CMAKE_COMMAND}
-    -DPREFIX=${DEPS_BUILD_DIR}
-    -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/libtermkey
-    -DURL=${LIBTERMKEY_URL}
-    -DEXPECTED_SHA256=${LIBTERMKEY_SHA256}
-    -DTARGET=libtermkey
-    -DUSE_EXISTING_SRC_DIR=${USE_EXISTING_SRC_DIR}
-    -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
+  -DPREFIX=${DEPS_BUILD_DIR}
+  -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/libtermkey
+  -DURL=${LIBTERMKEY_URL}
+  -DEXPECTED_SHA256=${LIBTERMKEY_SHA256}
+  -DTARGET=libtermkey
+  -DUSE_EXISTING_SRC_DIR=${USE_EXISTING_SRC_DIR}
+  -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
+  CONFIGURE_COMMAND ${CMAKE_COMMAND} ${DEPS_BUILD_DIR}/src/libtermkey
+    -DCMAKE_INSTALL_PREFIX=${DEPS_INSTALL_DIR}
+    # Pass toolchain
+    -DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN}
+    -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+    # Hack to avoid -rdynamic in Mingw
+    -DCMAKE_SHARED_LIBRARY_LINK_C_FLAGS=""
+    -DCMAKE_GENERATOR=${CMAKE_GENERATOR}
+  BUILD_COMMAND ${CMAKE_COMMAND} --build . --config ${CMAKE_BUILD_TYPE}
+  INSTALL_COMMAND ${CMAKE_COMMAND} --build . --target install --config ${CMAKE_BUILD_TYPE})
+else()
+ExternalProject_Add(libtermkey
+  PREFIX ${DEPS_BUILD_DIR}
+  URL ${LIBTERMKEY_URL}
+  DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/libtermkey
+  DOWNLOAD_COMMAND ${CMAKE_COMMAND}
+  -DPREFIX=${DEPS_BUILD_DIR}
+  -DDOWNLOAD_DIR=${DEPS_DOWNLOAD_DIR}/libtermkey
+  -DURL=${LIBTERMKEY_URL}
+  -DEXPECTED_SHA256=${LIBTERMKEY_SHA256}
+  -DTARGET=libtermkey
+  -DUSE_EXISTING_SRC_DIR=${USE_EXISTING_SRC_DIR}
+  -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/DownloadAndExtractFile.cmake
   CONFIGURE_COMMAND ""
   BUILD_IN_SOURCE 1
   BUILD_COMMAND ""
@@ -24,6 +44,10 @@ ExternalProject_Add(libtermkey
                               PKG_CONFIG_PATH=${DEPS_LIB_DIR}/pkgconfig
                               CFLAGS=-fPIC
                               install)
+endif()
 
 list(APPEND THIRD_PARTY_DEPS libtermkey)
-add_dependencies(libtermkey unibilium)
+if(NOT WIN32)
+  # There is no unibilium build recipe for Windows yet
+  add_dependencies(libtermkey unibilium)
+endif()