From 7aed4eb923b3c6a8aafcdb9a4e35a0924005c833 Mon Sep 17 00:00:00 2001
From: Ralf Habacker <ralf.habacker@freenet.de>
Date: Sat, 29 Oct 2011 00:25:18 +0200
Subject: [PATCH] refactored cmake version extracting from configure.ac

---
 cmake/CMakeLists.txt                | 19 ++++++------------
 cmake/modules/MacrosAutotools.cmake | 40 +++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 13 deletions(-)
 create mode 100644 cmake/modules/MacrosAutotools.cmake

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 51d27cd..98f1d5c 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -1,18 +1,5 @@
 project(dbus)
 
-#########################################################################
-# detect version
-#########################################################################
-file (READ ../configure.ac configure_ac)
-string (REGEX REPLACE ".*dbus_major_version], .([0-9]+).*" "\\1" DBUS_MAJOR_VERSION ${configure_ac})
-string (REGEX REPLACE ".*dbus_minor_version], .([0-9]+).*" "\\1" DBUS_MINOR_VERSION ${configure_ac})
-string (REGEX REPLACE ".*dbus_micro_version], .([0-9]+).*" "\\1" DBUS_MICRO_VERSION ${configure_ac})
-# used by file version info
-set (DBUS_PATCH_VERSION "0")
-set (DBUS_VERSION ${DBUS_MAJOR_VERSION}.${DBUS_MINOR_VERSION}.${DBUS_MICRO_VERSION})
-
-set (DBUS_VERSION_STRING "${DBUS_VERSION}")
-
 # we need to be up to date
 CMAKE_MINIMUM_REQUIRED(VERSION 2.4.4 FATAL_ERROR)
 if(COMMAND cmake_policy)
@@ -22,6 +9,12 @@ endif(COMMAND cmake_policy)
 # where to look first for cmake modules, before ${CMAKE_ROOT}/Modules/ is checked
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/modules")
 
+# detect version
+include(MacrosAutotools)
+autoversion(../configure.ac dbus)
+# used by file version info
+set (DBUS_PATCH_VERSION "0")
+
 include(Macros)
 TIMESTAMP(DBUS_BUILD_TIMESTAMP)
 
diff --git a/cmake/modules/MacrosAutotools.cmake b/cmake/modules/MacrosAutotools.cmake
new file mode 100644
index 0000000..ff30eaf
--- /dev/null
+++ b/cmake/modules/MacrosAutotools.cmake
@@ -0,0 +1,40 @@
+#
+# @Author Ralf Habacker
+# 
+# extracts version information from autoconf config file
+# and set related cmake variables
+# 
+# returns  
+#   ${prefix}_VERSION
+#   ${prefix}_VERSION_STRING
+#   ${prefix}_MAJOR_VERSION
+#   ${prefix}_MINOR_VERSION
+#   ${prefix}_MICRO_VERSION
+# 
+macro(autoversion config prefix)
+	file (READ ${config} _configure_ac)
+	string(TOUPPER ${prefix} prefix_upper)
+	string (REGEX REPLACE ".*${prefix}_major_version], .([0-9]+).*" "\\1" ${prefix_upper}_MAJOR_VERSION ${_configure_ac})
+	string (REGEX REPLACE ".*${prefix}_minor_version], .([0-9]+).*" "\\1" ${prefix_upper}_MINOR_VERSION ${_configure_ac})
+	string (REGEX REPLACE ".*${prefix}_micro_version], .([0-9]+).*" "\\1" ${prefix_upper}_MICRO_VERSION ${_configure_ac})
+	set (${prefix_upper}_VERSION ${${prefix_upper}_MAJOR_VERSION}.${${prefix_upper}_MINOR_VERSION}.${${prefix_upper}_MICRO_VERSION})
+	set (${prefix_upper}_VERSION_STRING "${${prefix_upper}_VERSION}")
+
+endmacro()
+
+#
+# parses config.h template and create cmake equivalent 
+# not implemented yet
+# 
+macro(autoconfig template output)
+	file(READ ${template} contents)
+	# Convert file contents into a CMake list (where each element in the list
+	# is one line of the file)
+	STRING(REGEX REPLACE ";" "\\\\;" contents "${contents}")
+	STRING(REGEX REPLACE "\n" ";" contents "${contents}")
+	foreach(line contents)
+		message(STATUS ${line})
+		# find #undef lines
+		# append to config.h #define <variable-name> <variable-content>
+	endforeach()
+endmacro()
-- 
2.7.4