[date] Add official CMake targets support

ports/date/0001-fix-uwp.patch

@@ -0,0 +1,13 @@
+diff --git i/include/date/date.h w/include/date/date.h
+index fce6200..6a77ad4 100644
+--- i/include/date/date.h
++++ w/include/date/date.h
+@@ -82,7 +82,7 @@
+ #ifdef _MSC_VER
+ #   pragma warning(push)
+ // warning C4127: conditional expression is constant
+-#   pragma warning(disable : 4127)
++#   pragma warning(disable : 4127 4996)
+ #endif
+
+ namespace date

ports/date/CONTROL

@@ -1,7 +1,7 @@
 Source: date
-Version: 2019-05-18-1
+Version: 2019-09-09
 Homepage: https://github.com/HowardHinnant/date
-Description: A date and time library based on the C++11/14/17 <chrono> header
+Description: A date and time library based on the C++17 <chrono> header
 
 Feature: remote-api
 Description: support automatic download of tz data

ports/date/portfile.cmake

@@ -10,37 +10,39 @@ endif()
 vcpkg_from_github(
   OUT_SOURCE_PATH SOURCE_PATH
   REPO HowardHinnant/date
-  REF ed0368fc75427ef05cefdf19a39b60d7bed2f039
-  SHA512 5f6a0d7e094fd1ab7b6a1ea9a96e467138220e9207e2eda68f71b68d6c56759e7470fabdfa920d92876e9c9b466e56ea8102333f407a46bb4cba43a2dfeb5e3a
+  REF 44344000f0fa32e66787d6d2c9ff5ddfd3605df7
+  SHA512 1ec75a4b6310f735261c996c63df8176f0523d8f59a23edd49fd8efbdcbf1e78051ba2f36df0920f6f5e6bbc8f81ea4639f73e05bb1cb7f97a8e500bde667782
   HEAD_REF master
+  PATCHES "${CMAKE_CURRENT_LIST_DIR}/0001-fix-uwp.patch"
 )
 
-file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${SOURCE_PATH})
-
-set(HAS_REMOTE_API 0)
+set(DATE_USE_SYSTEM_TZ_DB 1)
 if("remote-api" IN_LIST FEATURES)
-  set(HAS_REMOTE_API 1)
+  set(DATE_USE_SYSTEM_TZ_DB 0)
 endif()
 
 vcpkg_configure_cmake(
   SOURCE_PATH ${SOURCE_PATH}
   PREFER_NINJA
-  OPTIONS -DHAS_REMOTE_API=${HAS_REMOTE_API}
-  OPTIONS_DEBUG -DDISABLE_INSTALL_HEADERS=ON
+  OPTIONS
+    -DUSE_SYSTEM_TZ_DB=${DATE_USE_SYSTEM_TZ_DB}
+    -DENABLE_DATE_TESTING=OFF
 )
 
 vcpkg_install_cmake()
 
-vcpkg_fixup_cmake_targets(CONFIG_PATH share/unofficial-date TARGET_PATH share/unofficial-date)
+if(NOT VCPKG_CMAKE_SYSTEM_NAME OR VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
+  vcpkg_fixup_cmake_targets(CONFIG_PATH CMake TARGET_PATH share/date)
+else()
+  vcpkg_fixup_cmake_targets(CONFIG_PATH lib/cmake/date TARGET_PATH share/date)
+endif()
 
 vcpkg_copy_pdbs()
 
-set(HEADER "${CURRENT_PACKAGES_DIR}/include/date/tz.h")
-file(READ "${HEADER}" _contents)
-string(REPLACE "#define TZ_H" "#define TZ_H\n#undef HAS_REMOTE_API\n#define HAS_REMOTE_API ${HAS_REMOTE_API}" _contents "${_contents}")
-if(VCPKG_LIBRARY_LINKAGE STREQUAL dynamic)
-  string(REPLACE "ifdef DATE_BUILD_DLL" "if 1" _contents "${_contents}")
-endif()
-file(WRITE "${HEADER}" "${_contents}")
-
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
 file(INSTALL ${SOURCE_PATH}/LICENSE.txt DESTINATION ${CURRENT_PACKAGES_DIR}/share/date RENAME copyright)
+file(INSTALL ${CMAKE_CURRENT_LIST_DIR}/usage DESTINATION ${CURRENT_PACKAGES_DIR}/share/date)
+
+# Remove the wrapper when backwards compatibility with the unofficial::date::date and unofficial::date::tz
+# targets is no longer required.
+file(INSTALL ${CMAKE_CURRENT_LIST_DIR}/vcpkg-cmake-wrapper.cmake DESTINATION ${CURRENT_PACKAGES_DIR}/share/date)

ports/date/usage

@@ -0,0 +1,4 @@
+The package date provides CMake targets:
+
+    find_package(date CONFIG REQUIRED)
+    target_link_libraries(main PRIVATE date::date date::tz)

ports/date/vcpkg-cmake-wrapper.cmake

@@ -0,0 +1,11 @@
+_find_package(${ARGS})
+
+if(NOT TARGET unofficial::date::date AND TARGET date::date)
+  add_library(unofficial::date::date INTERFACE IMPORTED)
+  target_link_libraries(unofficial::date::date INTERFACE date::date)
+endif()
+
+if(NOT TARGET unofficial::date::tz AND TARGET date::tz)
+  add_library(unofficial::date::tz INTERFACE IMPORTED)
+  target_link_libraries(unofficial::date::tz INTERFACE date::tz)
+endif()