[INSTALL] Unify cmake install functions and dynamically set component dependencies

CHANGELOG.md

@@ -33,6 +33,10 @@ Increment the:
 * [API] Add Enabled method to Tracer
   [#3357](https://github.com/open-telemetry/opentelemetry-cpp/pull/3357)
 
+* [INSTALL] Add CMake components to the opentelemetry-cpp package
+  [#3320](https://github.com/open-telemetry/opentelemetry-cpp/pull/3220)
+  [#3368](https://github.com/open-telemetry/opentelemetry-cpp/pull/3368)
+
 ## [1.20 2025-04-01]
 
 * [BUILD] Update opentelemetry-proto version

CMakeLists.txt

@@ -841,6 +841,8 @@ if(prometheus-cpp_FOUND)
 endif()
 message(STATUS "---------------------------------------------")
 
+include("${PROJECT_SOURCE_DIR}/cmake/otel-install-functions.cmake")
+
 include(CMakePackageConfigHelpers)
 
 if(DEFINED OPENTELEMETRY_BUILD_DLL)
@@ -914,39 +916,14 @@ include(cmake/opentelemetry-build-external-component.cmake)
 include(cmake/patch-imported-config.cmake)
 
 if(OPENTELEMETRY_INSTALL)
-  # Export cmake config and support find_packages(opentelemetry-cpp CONFIG)
-  # Write config file for find_packages(opentelemetry-cpp CONFIG)
-  set(INCLUDE_INSTALL_DIR "${CMAKE_INSTALL_INCLUDEDIR}")
-  configure_package_config_file(
-    "${CMAKE_CURRENT_LIST_DIR}/cmake/templates/opentelemetry-cpp-config.cmake.in"
-    "${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}/${PROJECT_NAME}-config.cmake"
-    INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
-    PATH_VARS OPENTELEMETRY_ABI_VERSION_NO OPENTELEMETRY_VERSION PROJECT_NAME
-              INCLUDE_INSTALL_DIR CMAKE_INSTALL_LIBDIR)
-
-  # Write version file for find_packages(opentelemetry-cpp CONFIG)
-  write_basic_package_version_file(
-    "${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}/${PROJECT_NAME}-config-version.cmake"
-    VERSION ${OPENTELEMETRY_VERSION}
-    COMPATIBILITY ExactVersion)
-
-  # Write the "BUILT_WITH_<dependency" flags for use in the
-  # opentelemetry-cpp-config.cmake
-  configure_file(
-    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/templates/thirdparty-built-with-flags.cmake.in"
-    "${CMAKE_CURRENT_BINARY_DIR}/thirdparty-built-with-flags.cmake"
-    @ONLY)
-
-  install(
-    FILES
-      "${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}/${PROJECT_NAME}-config.cmake"
-      "${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}/${PROJECT_NAME}-config-version.cmake"
-      "${CMAKE_CURRENT_BINARY_DIR}/thirdparty-built-with-flags.cmake"
-      "${CMAKE_CURRENT_LIST_DIR}/cmake/component-definitions.cmake"
-      "${CMAKE_CURRENT_LIST_DIR}/cmake/thirdparty-dependency-definitions.cmake"
-      "${CMAKE_CURRENT_LIST_DIR}/cmake/find-package-support-functions.cmake"
-    DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
-    COMPONENT cmake-config)
+  # Install the cmake config and version files
+  otel_install_cmake_config()
+
+  # Install the components and associated files
+  otel_install_components()
+
+  # Install the thirdparty dependency definition file
+  otel_install_thirdparty_definitions()
 
   if(BUILD_PACKAGE)
     include(cmake/package.cmake)

api/CMakeLists.txt

@@ -9,28 +9,20 @@ target_include_directories(
 
 set_target_properties(opentelemetry_api PROPERTIES EXPORT_NAME api)
 
-if(OPENTELEMETRY_INSTALL)
-  install(
-    TARGETS opentelemetry_api
-    EXPORT "${PROJECT_NAME}-api-target"
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT api)
-
-  install(
-    DIRECTORY include/opentelemetry
-    DESTINATION include
-    COMPONENT api
-    FILES_MATCHING
-    PATTERN "*.h")
-
-  install(
-    EXPORT "${PROJECT_NAME}-api-target"
-    FILE "${PROJECT_NAME}-api-target.cmake"
-    NAMESPACE "${PROJECT_NAME}::"
-    DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
-    COMPONENT api)
+otel_add_component(
+  COMPONENT
+  api
+  TARGETS
+  opentelemetry_api
+  FILES_DIRECTORY
+  "include/opentelemetry"
+  FILES_DESTINATION
+  "include"
+  FILES_MATCHING
+  PATTERN
+  "*.h")
 
+if(OPENTELEMETRY_INSTALL)
   unset(TARGET_DEPS)
 endif()