Support component-based find_package (#756)

Signed-off-by: Juan Cruz Viotti <[email protected]>

config.cmake.in

@@ -1,8 +1,27 @@
 @PACKAGE_INIT@
 
+# Support both casing styles
+list(APPEND JSONBINPACK_COMPONENTS ${JSONBinPack_FIND_COMPONENTS})
+list(APPEND JSONBINPACK_COMPONENTS ${jsonbinpack_FIND_COMPONENTS})
+if(NOT JSONBINPACK_COMPONENTS)
+  list(APPEND JSONBINPACK_COMPONENTS runtime)
+  list(APPEND JSONBINPACK_COMPONENTS compiler)
+endif()
+
 include(CMakeFindDependencyMacro)
 find_dependency(JSONToolkit COMPONENTS uri json jsonpointer jsonschema)
 
 include("${CMAKE_CURRENT_LIST_DIR}/sourcemeta_jsonbinpack_runtime.cmake")
 include("${CMAKE_CURRENT_LIST_DIR}/sourcemeta_jsonbinpack_compiler.cmake")
+
+foreach(component ${JSONBINPACK_COMPONENTS})
+  if(component STREQUAL "runtime")
+    include("${CMAKE_CURRENT_LIST_DIR}/sourcemeta_jsonbinpack_runtime.cmake")
+  elseif(component STREQUAL "compiler")
+    include("${CMAKE_CURRENT_LIST_DIR}/sourcemeta_jsonbinpack_compiler.cmake")
+  else()
+    message(FATAL_ERROR "Unknown JSON BinPack component: ${component}")
+  endif()
+endforeach()
+
 check_required_components("@PROJECT_NAME@")