out_zerobus: add Zerobus output plugin

.gitignore

@@ -39,6 +39,7 @@ workflow/
 .vagrant/
 # examples
 examples/wasi_serde_json/target/
+**/rust/target/
 # WASM test data
 tests/runtime/wasm/go/*.wasm
 tests/integration/.venv/

CMakeLists.txt

@@ -346,6 +346,7 @@ option(FLB_PREFER_SYSTEM_LIB_LUAJIT       "Prefer the libluajit system library"
 option(FLB_PREFER_SYSTEM_LIB_MSGPACK      "Prefer the libmsgpack system library"      ${FLB_PREFER_SYSTEM_LIBS})
 option(FLB_PREFER_SYSTEM_LIB_NGHTTP2      "Prefer the libnghttp2 system library"      ${FLB_PREFER_SYSTEM_LIBS})
 option(FLB_PREFER_SYSTEM_LIB_SQLITE       "Prefer the libsqlite3 system library"      ${FLB_PREFER_SYSTEM_LIBS})
+option(FLB_PREFER_SYSTEM_LIB_ZEROBUS_FFI  "Prefer the Zerobus FFI system library"     ${FLB_PREFER_SYSTEM_LIBS})
 option(FLB_PREFER_SYSTEM_LIB_ZSTD         "Prefer the libzstd system library"         ${FLB_PREFER_SYSTEM_LIBS})
 
 # Enable all features
@@ -1370,6 +1371,12 @@ if(FLB_OUT_PGSQL AND (NOT PostgreSQL_FOUND))
    FLB_OPTION(FLB_OUT_PGSQL OFF)
 endif()
 
+# Zerobus FFI
+# ===========
+if(FLB_OUT_ZEROBUS)
+  include(cmake/zerobus-ffi.cmake)
+endif()
+
 # Arrow GLib
 # ==========
 find_package(PkgConfig)

cmake/libraries.cmake

@@ -29,5 +29,6 @@ set(FLB_PATH_LIB_ZSTD        "lib/zstd-1.5.7")
 set(FLB_PATH_LIB_SIMDUTF      "lib/simdutf-amalgamation-5.5.0")
 set(FLB_PATH_LIB_ZIG_SDK     "lib/zig_sdk")
 set(FLB_PATH_LIB_YYJSON      "lib/yyjson-0.12.0")
+set(FLB_PATH_LIB_ZEROBUS_FFI  "lib/zerobus-ffi-1.3.0")
 set(FLB_PATH_LIB_LIBBACKTRACE "lib/libbacktrace-b9e4006")
 set(FLB_PATH_LIB_RIPSER       "lib/ripser-1.2.1")

cmake/plugins_options.cmake

@@ -156,3 +156,4 @@ DEFINE_OPTION(FLB_OUT_TCP                     "Enable TCP output plugin"
 DEFINE_OPTION(FLB_OUT_UDP                     "Enable UDP output plugin"                     ON)
 DEFINE_OPTION(FLB_OUT_VIVO_EXPORTER           "Enable Vivo exporter output plugin"           ON)
 DEFINE_OPTION(FLB_OUT_WEBSOCKET               "Enable Websocket output plugin"               ON)
+DEFINE_OPTION(FLB_OUT_ZEROBUS                 "Enable Databricks Zerobus output plugin"      OFF)

cmake/zerobus-ffi.cmake

@@ -0,0 +1,96 @@
+# Build or locate the Zerobus FFI static library.
+#
+# The out_zerobus plugin builds the bundled Zerobus FFI Rust source by default.
+# Use -DZEROBUS_LIB_DIR=/path/to/dir to point to a custom prebuilt location, or
+# -DFLB_PREFER_SYSTEM_LIB_ZEROBUS_FFI=On to prefer a system library.
+#
+# After this module runs successfully:
+#   ZEROBUS_LIB_FILE         - full path to the static library
+#   ZEROBUS_LIB_BUILD_TARGET - optional target that builds the bundled library
+#   ZEROBUS_FFI_INCLUDE_DIR  - directory containing zerobus.h
+
+set(_ZEROBUS_LIB_NAME "zerobus_ffi")
+set(ZEROBUS_LIB_BUILD_TARGET "")
+set(ZEROBUS_RUST_SOURCE_DIR
+  "${FLB_PATH_ROOT_SOURCE}/${FLB_PATH_LIB_ZEROBUS_FFI}/rust")
+
+if(NOT ZEROBUS_INCLUDE_DIR)
+  set(ZEROBUS_INCLUDE_DIR "${ZEROBUS_RUST_SOURCE_DIR}/ffi")
+endif()
+set(ZEROBUS_FFI_INCLUDE_DIR "${ZEROBUS_INCLUDE_DIR}")
+
+if(ZEROBUS_LIB_DIR)
+  find_library(ZEROBUS_LIB_FILE
+    NAMES ${_ZEROBUS_LIB_NAME}
+    PATHS "${ZEROBUS_LIB_DIR}"
+    NO_DEFAULT_PATH
+    NO_CMAKE_FIND_ROOT_PATH
+  )
+elseif(FLB_PREFER_SYSTEM_LIB_ZEROBUS_FFI)
+  find_library(ZEROBUS_LIB_FILE NAMES ${_ZEROBUS_LIB_NAME})
+endif()
+
+if(ZEROBUS_LIB_FILE)
+  message(STATUS "Zerobus FFI library: ${ZEROBUS_LIB_FILE}")
+  return()
+endif()
+
+if(NOT EXISTS "${ZEROBUS_RUST_SOURCE_DIR}/Cargo.toml")
+  message(FATAL_ERROR
+    "Bundled Zerobus FFI source not found at ${ZEROBUS_RUST_SOURCE_DIR}. "
+    "Install libzerobus_ffi and set -DFLB_PREFER_SYSTEM_LIB_ZEROBUS_FFI=On, "
+    "set -DZEROBUS_LIB_DIR=/path/to/lib, or disable the plugin with "
+    "-DFLB_OUT_ZEROBUS=OFF.")
+endif()
+
+find_program(CARGO_EXECUTABLE cargo)
+if(NOT CARGO_EXECUTABLE)
+  message(FATAL_ERROR
+    "cargo is required to build the bundled Zerobus FFI source. Install Rust, "
+    "set -DZEROBUS_LIB_DIR=/path/to/lib, or disable the plugin with "
+    "-DFLB_OUT_ZEROBUS=OFF.")
+endif()
+
+set(ZEROBUS_CARGO_TARGET_DIR
+  "${CMAKE_BINARY_DIR}/zerobus-cargo-target"
+  CACHE PATH "Cargo target directory for bundled Zerobus FFI builds")
+
+set(_ZEROBUS_CARGO_RELEASE_DIR "${ZEROBUS_CARGO_TARGET_DIR}/release")
+set(_ZEROBUS_CARGO_TARGET_ARGS "")
+if(ZEROBUS_RUST_TARGET)
+  list(APPEND _ZEROBUS_CARGO_TARGET_ARGS --target "${ZEROBUS_RUST_TARGET}")
+  set(_ZEROBUS_CARGO_RELEASE_DIR
+    "${ZEROBUS_CARGO_TARGET_DIR}/${ZEROBUS_RUST_TARGET}/release")
+endif()
+
+set(ZEROBUS_LIB_FILE
+  "${_ZEROBUS_CARGO_RELEASE_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}zerobus_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}")
+
+file(GLOB_RECURSE _ZEROBUS_RUST_SOURCES CONFIGURE_DEPENDS
+  "${ZEROBUS_RUST_SOURCE_DIR}/Cargo.toml"
+  "${ZEROBUS_RUST_SOURCE_DIR}/Cargo.lock"
+  "${ZEROBUS_RUST_SOURCE_DIR}/ffi/*"
+  "${ZEROBUS_RUST_SOURCE_DIR}/sdk/*"
+)
+
+add_custom_command(
+  OUTPUT "${ZEROBUS_LIB_FILE}"
+  COMMAND ${CMAKE_COMMAND} -E env
+    "CARGO_TARGET_DIR=${ZEROBUS_CARGO_TARGET_DIR}"
+    "${CARGO_EXECUTABLE}" build
+      --manifest-path "${ZEROBUS_RUST_SOURCE_DIR}/Cargo.toml"
+      --locked
+      --release
+      -p zerobus-ffi
+      ${_ZEROBUS_CARGO_TARGET_ARGS}
+  DEPENDS ${_ZEROBUS_RUST_SOURCES}
+  WORKING_DIRECTORY "${ZEROBUS_RUST_SOURCE_DIR}"
+  COMMENT "Building bundled Zerobus FFI"
+  VERBATIM
+)
+
+add_custom_target(zerobus-ffi-bundled DEPENDS "${ZEROBUS_LIB_FILE}")
+set(ZEROBUS_LIB_BUILD_TARGET zerobus-ffi-bundled)
+
+message(STATUS "Zerobus FFI source: ${ZEROBUS_RUST_SOURCE_DIR}")
+message(STATUS "Zerobus FFI library: ${ZEROBUS_LIB_FILE}")

lib/zerobus-ffi-1.3.0/LICENSE

@@ -0,0 +1,201 @@
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