[nng] Add new package

ports/nng/CONTROL

@@ -0,0 +1,3 @@
+Source: nng
+Version: 1.0.1
+Description: NNG, like its predecessors nanomsg (and to some extent ZeroMQ), is a lightweight, broker-less library, offering a simple API to solve common recurring messaging problems, such as publish/subscribe, RPC-style request/reply, or service discovery.

ports/nng/fix-include-path.patch

@@ -0,0 +1,14 @@
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index e59ee5b..b5f6a0d 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -238,6 +238,9 @@ set_target_properties (${PROJECT_NAME} ${PROJECT_NAME}
+ target_link_libraries (${PROJECT_NAME} PRIVATE ${NNG_REQUIRED_LIBRARIES})
+ target_link_libraries (${PROJECT_NAME} PRIVATE Threads::Threads)
+ 
++# See: https://github.com/nanomsg/nanomsg/pull/949/
++target_include_directories(${PROJECT_NAME} PUBLIC $<INSTALL_INTERFACE:include>)
++
+ install (TARGETS ${PROJECT_NAME}
+     EXPORT ${PROJECT_NAME}-target
+     FRAMEWORK DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT library

ports/nng/portfile.cmake

@@ -0,0 +1,44 @@
+include(vcpkg_common_functions)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO nanomsg/nng
+    REF ce9f0cb155ad0e97cfc7703d9d7c8e5bec3201bc
+    SHA512 e1fca685e3397398bd259d126560902e813d1e2fb5cdb04de9d3f2fd74961f53af53dbaf9a555113a5588f07a3859d16bdc64f0a0ff65a7b5cf89965e764e68d
+    HEAD_REF master
+    PATCHES fix-include-path.patch
+)
+
+string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "static" NNG_STATIC_LIB)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS
+        -DCMAKE_DISABLE_FIND_PACKAGE_Git=TRUE
+        -DNNG_STATIC_LIB=${NNG_STATIC_LIB}
+        -DNNG_TESTS=OFF
+        -DNNG_ENABLE_NNGCAT=OFF
+)
+
+vcpkg_install_cmake()
+
+# Move CMake config files to the right place
+if(EXISTS ${CURRENT_PACKAGES_DIR}/cmake)
+    vcpkg_fixup_cmake_targets(CONFIG_PATH cmake)
+endif()
+if(EXISTS ${CURRENT_PACKAGES_DIR}/lib/cmake/nng)
+    vcpkg_fixup_cmake_targets(CONFIG_PATH lib/cmake/nng)
+endif()
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+
+# Put the licence file where vcpkg expects it
+file(COPY
+    ${SOURCE_PATH}/LICENSE.txt
+    DESTINATION ${CURRENT_PACKAGES_DIR}/share/nng)
+file(RENAME
+    ${CURRENT_PACKAGES_DIR}/share/nng/LICENSE.txt
+    ${CURRENT_PACKAGES_DIR}/share/nng/copyright)
+
+vcpkg_copy_pdbs()