CMake: get AvTranscoder versions from headers

Clement Champetier · Clement Champetier · commit 97207e0e0a37 · 2015-10-12T12:03:37.000+02:00
Because it could be great to get the versions in bindings.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -2,17 +2,6 @@ cmake_minimum_required(VERSION 2.8.11)
 
 project(AvTranscoder)
 
-# Set AvTranscoder versions
-set(AVTRANSCODER_VERSION_MAJOR "0")
-set(AVTRANSCODER_VERSION_MINOR "5")
-set(AVTRANSCODER_VERSION_MICRO "10")
-set(AVTRANSCODER_VERSION ${AVTRANSCODER_VERSION_MAJOR}.${AVTRANSCODER_VERSION_MINOR}.${AVTRANSCODER_VERSION_MICRO})
-
-# Define AvTranscoder versions
-add_definitions(-DAVTRANSCODER_VERSION_MAJOR=${AVTRANSCODER_VERSION_MAJOR})
-add_definitions(-DAVTRANSCODER_VERSION_MINOR=${AVTRANSCODER_VERSION_MINOR})
-add_definitions(-DAVTRANSCODER_VERSION_MICRO=${AVTRANSCODER_VERSION_MICRO})
-
 # Define AvTranscoder default path to profiles
 add_definitions(-DAVTRANSCODER_DEFAULT_AVPROFILES="${CMAKE_INSTALL_PREFIX}/share/avprofiles")
 
diff --git a/cmake/AvTranscoderMacros.cmake b/cmake/AvTranscoderMacros.cmake
@@ -2,3 +2,24 @@
 set(AVTRANSCODER_APP_PATH "${PROJECT_SOURCE_DIR}/app")
 set(AVTRANSCODER_SRC_PATH "${PROJECT_SOURCE_DIR}/src")
 file(GLOB_RECURSE AVTRANSCODER_SRC_FILES "AvTranscoder/*.cpp" "AvTranscoder/*.hpp")
+
+# Get AvTranscoder versions
+# AVTRANSCODER_VERSION_MAJOR
+# AVTRANSCODER_VERSION_MINOR
+# AVTRANSCODER_VERSION_MICRO
+# AVTRANSCODER_VERSION
+file(STRINGS "${AVTRANSCODER_SRC_PATH}/AvTranscoder/common.hpp" _avtranscoder_VERSION_HPP_CONTENTS REGEX "#define AVTRANSCODER_VERSION_")
+foreach(v MAJOR MINOR MICRO)
+  if("${_avtranscoder_VERSION_HPP_CONTENTS}" MATCHES "#define AVTRANSCODER_VERSION_${v} ([0-9]+)")
+    set(AVTRANSCODER_VERSION_${v} "${CMAKE_MATCH_1}")
+  else()
+    set(AVTRANSCODER_RETRIEVE_VERSION_FAILED 1)
+  endif()
+endforeach()
+unset(_avtranscoder_VERSION_HPP_CONTENTS)
+
+set(AVTRANSCODER_VERSION "${AVTRANSCODER_VERSION_MAJOR}.${AVTRANSCODER_VERSION_MINOR}.${AVTRANSCODER_VERSION_MICRO}")
+
+if(AVTRANSCODER_RETRIEVE_VERSION_FAILED)
+  message(SEND_ERROR "Failed to retrieve AvTranscoder version: ${AVTRANSCODER_VERSION}")
+endif()
diff --git a/src/AvTranscoder/common.hpp b/src/AvTranscoder/common.hpp
@@ -1,6 +1,10 @@
 #ifndef _AV_TRANSCODER_COMMON_HPP_
 #define _AV_TRANSCODER_COMMON_HPP_
 
+#define AVTRANSCODER_VERSION_MAJOR 0
+#define AVTRANSCODER_VERSION_MINOR 5
+#define AVTRANSCODER_VERSION_MICRO 10
+
 #include <AvTranscoder/system.hpp>
 
 extern "C" {
