[duktape] Fix package not found by find_package.

ports/duktape/CONTROL

@@ -1,5 +1,5 @@
 Source: duktape
-Version: 2.3.0
+Version: 2.3.0-1
 Homepage: https://github.com/svaarala/duktape
 Description: Embeddable Javascript engine with a focus on portability and compact footprint.
 Build-Depends:

ports/duktape/duktapeConfig.cmake

@@ -0,0 +1,33 @@
+# - Try to find duktape
+# Once done this will define
+#
+#  DUKTAPE_FOUND - system has Duktape
+#  DUKTAPE_INCLUDE_DIRS - the Duktape include directory
+#  DUKTAPE_LIBRARIES - Link these to use DUKTAPE
+#  DUKTAPE_DEFINITIONS - Compiler switches required for using Duktape
+#
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_DUK QUIET duktape libduktape)
+
+find_path(DUKTAPE_INCLUDE_DIR duktape.h
+    HINTS ${PC_DUK_INCLUDEDIR} ${PC_DUK_INCLUDE_DIRS}
+    PATH_SUFFIXES duktape)
+
+find_library(DUKTAPE_LIBRARY
+    NAMES duktape libduktape
+    HINTS ${PC_DUK_LIBDIR} ${PC_DUK_LIBRARY_DIRS})
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Duktape
+    REQUIRED_VARS DUKTAPE_LIBRARY DUKTAPE_INCLUDE_DIR)
+
+if (DUKTAPE_FOUND)
+    set (DUKTAPE_LIBRARIES ${DUKTAPE_LIBRARY})
+    set (DUKTAPE_INCLUDE_DIRS ${DUKTAPE_INCLUDE_DIR} )
+endif ()
+
+MARK_AS_ADVANCED(
+    DUKTAPE_INCLUDE_DIR
+    DUKTAPE_LIBRARY
+)

ports/duktape/portfile.cmake

@@ -13,6 +13,8 @@ vcpkg_from_github(
 )
 
 file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${SOURCE_PATH})
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/duktapeConfig.cmake DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT})
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/usage DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT})
 
 if(CMAKE_HOST_WIN32)
     set(EXECUTABLE_SUFFIX ".exe")

ports/duktape/usage

@@ -0,0 +1,5 @@
+find_package(duktape CONFIG REQUIRED)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${DUKTAPE_INCLUDE_DIRS})
+
+target_link_libraries(main ${DUKTAPE_LIBRARY})