st: fix reflectcpp consumer configure - find jansson for the Avro backend

CI (Lint and unit-test jobs) failed at CMake generate time with:

  The link interface of target "reflectcpp::reflectcpp" contains:
    jansson::jansson
  but the target was not found.

With the avro feature on, reflect-cpp links the static avro-c archive,
whose link interface carries jansson::jansson - but the upstream
reflectcpp-config.cmake has no Avro find_dependency block, so the target is
never defined in the consumer. The local macOS build didn't catch it
because the only local consumer (StExamples) is an OBJECT library, which
never links and so never triggers CMake's imported-target validation; a
minimal linking-consumer reproduction fails identically to CI.

Patch the installed config from the overlay portfile (gated on the avro
feature) to find_dependency(jansson CONFIG) before including the exports,
and bump the overlay to port-version 2 since the previously pushed content
changed.

Verified: the linking-consumer repro configures and links; the full local
build and 83/83 pulsar-st-tests stay green.

Signed-off-by: Matteo Merli <mmerli@apache.org>

Author: merlimat

vcpkg-overlay/reflectcpp/portfile.cmake

@@ -45,6 +45,16 @@ vcpkg_cmake_config_fixup(
     CONFIG_PATH "lib/cmake/${PORT}"
 )
 
+if("avro" IN_LIST FEATURES)
+    # The Avro backend links the static avro-c archive, whose link interface
+    # carries jansson::jansson — but the upstream config has no Avro
+    # find_dependency block, so consumers fail at generate time with
+    # "the target was not found". Define it before the exports are included.
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/share/${PORT}/${PORT}-config.cmake"
+        "include(\${CMAKE_CURRENT_LIST_DIR}/reflectcpp-exports.cmake)"
+        "include(CMakeFindDependencyMacro)\nfind_dependency(jansson CONFIG)\ninclude(\${CMAKE_CURRENT_LIST_DIR}/reflectcpp-exports.cmake)")
+endif()
+
 file(REMOVE_RECURSE
     "${CURRENT_PACKAGES_DIR}/debug/include"
     "${CURRENT_PACKAGES_DIR}/debug/share"

vcpkg-overlay/reflectcpp/vcpkg.json

@@ -1,7 +1,7 @@
 {
   "name": "reflectcpp",
   "version": "0.24.0",
-  "port-version": 1,
+  "port-version": 2,
   "description": "A C++ library for serialization and deserialization using reflection. Supports JSON, Avro, BSON, Cap'n Proto, CBOR, CSV, flexbuffers, msgpack, parquet, TOML, UBJSON, XML, YAML.",
   "homepage": "https://github.com/getml/reflect-cpp/",
   "license": "MIT",