Install protobuf from cmake project

Additional export as "protobuf" package
for importing from other cmake projects

4 files changed, 85 insertions, 0 deletions

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index d36292df..dbcf3490 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -1,13 +1,35 @@
+# Minimum CMake required
 cmake_minimum_required(VERSION 2.8)
 
+# Project
 project(protobuf C CXX)
 
+# Options
 option(BUILD_TESTING "Build tests" ON)
 option(BUILD_SHARED_LIBS "Build Shared Libraries" OFF)
 if (MSVC)
   option(ZLIB "Build with zlib support" OFF)
 endif (MSVC)
 
+# Path to common header
+set(protobuf_COMMON_HEADER "../src/google/protobuf/stubs/common.h")
+
+# Parse version from common header
+file(STRINGS "${protobuf_COMMON_HEADER}" protobuf_VERSION_LINE
+  LIMIT_COUNT 1
+  REGEX "^#define GOOGLE_PROTOBUF_VERSION [0-9]+$")
+string(REGEX REPLACE "^.*PROTOBUF_VERSION ([0-9]+).*$" "\\1"
+    protobuf_VERSION_NUMBER "${protobuf_VERSION_LINE}")
+math(EXPR protobuf_VERSION_MICRO
+  "${protobuf_VERSION_NUMBER} % 1000")
+math(EXPR protobuf_VERSION_MINOR
+  "(${protobuf_VERSION_NUMBER} - ${protobuf_VERSION_MICRO}) % 1000000 / 1000")
+math(EXPR protobuf_VERSION_MAJOR
+  "(${protobuf_VERSION_NUMBER} - ${protobuf_VERSION_MINOR} * 1000 - ${protobuf_VERSION_MICRO}) % 1000000000 / 1000000")
+set(protobuf_VERSION_PATCH ${protobuf_VERSION_MICRO})
+set(protobuf_VERSION
+  "${protobuf_VERSION_MAJOR}.${protobuf_VERSION_MINOR}.${protobuf_VERSION_MICRO}")
+
 add_definitions(-DGOOGLE_PROTOBUF_CMAKE_BUILD)
 
 find_package(Threads REQUIRED)
@@ -73,6 +95,9 @@ include(libprotobuf-lite.cmake)
 include(libprotobuf.cmake)
 include(libprotoc.cmake)
 include(protoc.cmake)
+
 if (BUILD_TESTING)
   include(tests.cmake)
 endif (BUILD_TESTING)
+
+include(install.cmake)
diff --git a/cmake/install.cmake b/cmake/install.cmake
new file mode 100644
index 00000000..e7f2aea5
--- /dev/null
+++ b/cmake/install.cmake
@@ -0,0 +1,58 @@
+include(GNUInstallDirs)

+

+foreach(_library

+  libprotobuf-lite

+  libprotobuf

+  libprotoc)

+  set_property(TARGET ${_library}

+    PROPERTY INTERFACE_INCLUDE_DIRECTORIES $<INSTALL_INTERFACE:include>)

+  install(TARGETS ${_library} EXPORT protobuf-targets

+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT ${_library}

+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT ${_library}

+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT ${_library})

+endforeach()

+

+install(TARGETS protoc EXPORT protobuf-targets

+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT protoc)

+

+if(MSVC)

+  file(STRINGS extract_includes.bat.in _extract_strings

+    REGEX "^copy")

+  foreach(_extract_string ${_extract_strings})

+    string(REPLACE "copy \${PROTOBUF_SOURCE_WIN32_PATH}\\" ""

+      _extract_string ${_extract_string})

+    string(REPLACE "\\" "/" _extract_string ${_extract_string})

+    string(REGEX MATCH "^[^ ]+"

+      _extract_from ${_extract_string})

+    string(REGEX REPLACE "^${_extract_from} ([^$]+)" "\\1"

+      _extract_to ${_extract_string})

+    get_filename_component(_extract_from "${protobuf_SOURCE_DIR}/${_extract_from}" ABSOLUTE)

+    get_filename_component(_extract_name ${_extract_to} NAME)

+    get_filename_component(_extract_to ${_extract_to} PATH)

+    if(EXISTS "${_extract_from}")

+      install(FILES "${_extract_from}"

+        DESTINATION "${_extract_to}"

+        COMPONENT protobuf-headers

+        RENAME "${_extract_name}")

+    else()

+      message(AUTHOR_WARNING "The file \"${_extract_from}\" is listed in "

+        "\"${protobuf_SOURCE_DIR}/cmake/extract_includes.bat.in\" "

+        "but there not exists. The file will not be installed.")

+    endif()

+  endforeach()

+endif()

+

+install(EXPORT protobuf-targets

+  DESTINATION "lib/cmake/protobuf"

+  COMPONENT protobuf-export)

+

+configure_file(protobuf-config.cmake.in

+  protobuf-config.cmake @ONLY)

+configure_file(protobuf-config-version.cmake.in

+  protobuf-config-version.cmake @ONLY)

+

+install(FILES

+  "${protobuf_BINARY_DIR}/protobuf-config.cmake"

+  "${protobuf_BINARY_DIR}/protobuf-config-version.cmake"

+  DESTINATION "lib/cmake/protobuf"

+  COMPONENT protobuf-export)

diff --git a/cmake/protobuf-config-version.cmake.in b/cmake/protobuf-config-version.cmake.in
new file mode 100644
index 00000000..07ab40b9
--- /dev/null
+++ b/cmake/protobuf-config-version.cmake.in
@@ -0,0 +1 @@
+set(PACKAGE_VERSION @protobuf_VERSION@)

diff --git a/cmake/protobuf-config.cmake.in b/cmake/protobuf-config.cmake.in
new file mode 100644
index 00000000..6ae09d59
--- /dev/null
+++ b/cmake/protobuf-config.cmake.in
@@ -0,0 +1 @@
+include("${CMAKE_CURRENT_LIST_DIR}/protobuf-targets.cmake")