From 20b806037bb4f566861070c80890f273aba58a50 Mon Sep 17 00:00:00 2001
From: Alexander Damian <adamian@bloomberg.net>
Date: Wed, 3 Jul 2019 18:01:28 -0400
Subject: [PATCH] Added options to conditionally disable installation of
 configuration files

---
 CMakeLists.txt        |  2 ++
 README.md             |  2 ++
 cmake/config.cmake.in |  2 +-
 src/CMakeLists.txt    | 68 +++++++++++++++++++++++--------------------
 4 files changed, 41 insertions(+), 33 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 45077bd..3caed5b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,6 +44,8 @@ option(CPPKAFKA_DISABLE_EXAMPLES "Disable build of cppkafka examples." OFF)
 option(CPPKAFKA_BOOST_STATIC_LIBS "Link with Boost static libraries." ON)
 option(CPPKAFKA_BOOST_USE_MULTITHREADED "Use Boost multithreaded libraries." ON)
 option(CPPKAFKA_RDKAFKA_STATIC_LIB "Link with Rdkafka static library." OFF)
+option(CPPKAFKA_EXPORT_PKGCONFIG "Generate 'cppkafka.pc' file" ON)
+option(CPPKAFKA_EXPORT_CMAKE_CONFIG "Generate CMake config, target and version files." ON)
 
 # Add FindRdKafka.cmake
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
diff --git a/README.md b/README.md
index d0243c8..5301930 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,8 @@ The following cmake options can be specified:
 * `CPPKAFKA_RDKAFKA_STATIC_LIB` : Link to Rdkafka static library. Default is `OFF`.
 * `CPPKAFKA_CONFIG_DIR` : Install location of the cmake configuration files. Default is `lib/cmake/cppkafka`.
 * `CPPKAFKA_PKGCONFIG_DIR` : Install location of the .pc file. Default is `share/pkgconfig`.
+* `CPPKAFKA_EXPORT_PKGCONFIG` : Generate `cppkafka.pc` file. Default is `ON`.
+* `CPPKAFKA_EXPORT_CMAKE_CONFIG` : Generate CMake config, target and version files. Default is `ON`.
 
 Example:
 ```Shell
diff --git a/cmake/config.cmake.in b/cmake/config.cmake.in
index 89a4e4d..32f4398 100644
--- a/cmake/config.cmake.in
+++ b/cmake/config.cmake.in
@@ -11,7 +11,7 @@ set(RDKAFKA_MIN_VERSION_HEX "@RDKAFKA_MIN_VERSION_HEX@")
 find_dependency(Boost REQUIRED)
 
 # Try to find the RdKafka configuration file if present.
-# This will search default system locations as well as RdKafka_ROOT and RdKafka_Dir paths if specified.
+# This will search default system locations as well as RdKafka_ROOT and RdKafka_DIR paths if specified.
 find_package(RdKafka QUIET CONFIG)
 set(RDKAFKA_TARGET_IMPORTS ${RdKafka_FOUND})
 if (NOT RdKafka_FOUND)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index c49b600..4c23cfc 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -64,40 +64,44 @@ install(
     INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
 )
 
-# Install the exported file
-install(
-    EXPORT "${TARGET_EXPORT_NAME}"
-    NAMESPACE "${NAMESPACE}"
-    COMPONENT config
-    DESTINATION "${CPPKAFKA_CONFIG_DIR}"
-)
+if (CPPKAFKA_EXPORT_PKGCONFIG)
+    # Generate and install pkgconfig file
+    configure_file(${PROJECT_SOURCE_DIR}/cmake/cppkafka.pc.in ${PKG_CONFIG_FILE} @ONLY)
 
-# Generate and install pkgconfig file
-configure_file(${PROJECT_SOURCE_DIR}/cmake/cppkafka.pc.in ${PKG_CONFIG_FILE} @ONLY)
+    install(
+        FILES ${PKG_CONFIG}
+        DESTINATION "${CPPKAFKA_PKGCONFIG_DIR}"
+        COMPONENT pkgconfig
+    )
+endif()
 
-install(
-    FILES ${PKG_CONFIG}
-    DESTINATION "${CPPKAFKA_PKGCONFIG_DIR}"
-    COMPONENT pkgconfig
-)
+if (CPPKAFKA_EXPORT_CMAKE_CONFIG)
+    # Install the exported file
+    install(
+        EXPORT "${TARGET_EXPORT_NAME}"
+        NAMESPACE "${NAMESPACE}"
+        COMPONENT config
+        DESTINATION "${CPPKAFKA_CONFIG_DIR}"
+    )
 
-# Generate CMAKE configuration file and exported targets
-configure_package_config_file(
-    "${PROJECT_SOURCE_DIR}/cmake/config.cmake.in"
-    "${CONFIG_FILE}"
-    INSTALL_DESTINATION "${CPPKAFKA_CONFIG_DIR}"
-    PATH_VARS RDKAFKA_MIN_VERSION_HEX CMAKE_INSTALL_PREFIX CMAKE_INSTALL_INCLUDEDIR CMAKE_INSTALL_LIBDIR
-)
+    # Generate CMAKE configuration file and exported targets
+    configure_package_config_file(
+        "${PROJECT_SOURCE_DIR}/cmake/config.cmake.in"
+        "${CONFIG_FILE}"
+        INSTALL_DESTINATION "${CPPKAFKA_CONFIG_DIR}"
+        PATH_VARS RDKAFKA_MIN_VERSION_HEX CMAKE_INSTALL_PREFIX CMAKE_INSTALL_INCLUDEDIR CMAKE_INSTALL_LIBDIR
+    )
 
-# Generate version file
-write_basic_package_version_file(
-    "${VERSION_FILE}"
-    VERSION ${CPPKAFKA_VERSION}
-    COMPATIBILITY AnyNewerVersion
-)
+    # Generate version file
+    write_basic_package_version_file(
+        "${VERSION_FILE}"
+        VERSION ${CPPKAFKA_VERSION}
+        COMPATIBILITY AnyNewerVersion
+    )
 
-install(
-    FILES "${CONFIG_FILE}" "${VERSION_FILE}" "${FIND_RDKAFKA_FILE}"
-    DESTINATION "${CPPKAFKA_CONFIG_DIR}"
-    COMPONENT config
-)
+    install(
+        FILES "${CONFIG_FILE}" "${VERSION_FILE}" "${FIND_RDKAFKA_FILE}"
+        DESTINATION "${CPPKAFKA_CONFIG_DIR}"
+        COMPONENT config
+    )
+endif()