From 67b5d507010be0528c886133cae73fff0e3c7712 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sat, 23 Feb 2013 18:46:23 +0100
Subject: Use 'git describe' output as version string when available

---
 CMakeLists.txt   |  8 +++++++-
 GitVersion.cmake | 13 +++++++++++++
 config.h.in      |  2 +-
 3 files changed, 21 insertions(+), 2 deletions(-)
 create mode 100644 GitVersion.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5de8ccd..8bc5c84 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,15 @@
 cmake_minimum_required(VERSION 2.8.3)
 project(FASTD C)
-set(PROJECT_VERSION "7+")
 
 set(CMAKE_MODULE_PATH ${FASTD_SOURCE_DIR})
 
+include(GitVersion)
+
+git_version(FASTD_VERSION ${FASTD_SOURCE_DIR})
+if(NOT FASTD_VERSION)
+  set(FASTD_VERSION "v7+")
+endif(NOT FASTD_VERSION)
+
 find_package(BISON 2.5 REQUIRED)
 find_package(FLEX REQUIRED)
 
diff --git a/GitVersion.cmake b/GitVersion.cmake
new file mode 100644
index 0000000..8eed8c5
--- /dev/null
+++ b/GitVersion.cmake
@@ -0,0 +1,13 @@
+find_program(GIT_EXECUTABLE git DOC "path to the git executable")
+mark_as_advanced(GIT_EXECUTABLE)
+
+function(git_version RESULT_VAR DIR)
+  set(${RESULT_VAR} "" PARENT_SCOPE)
+  if(GIT_EXECUTABLE)
+    execute_process(COMMAND ${GIT_EXECUTABLE} describe WORKING_DIRECTORY ${DIR} OUTPUT_VARIABLE git_version_OUTPUT ERROR_VARIABLE git_version_ERROR RESULT_VARIABLE git_version_RESULT OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    if(${git_version_RESULT} EQUAL 0)
+      set(${RESULT_VAR} "${git_version_OUTPUT}" PARENT_SCOPE)
+    endif()
+  endif()
+endfunction(git_version)
diff --git a/config.h.in b/config.h.in
index 8fdba1b..5aa1f6a 100644
--- a/config.h.in
+++ b/config.h.in
@@ -27,7 +27,7 @@
 #ifndef _FASTD_CONFIG_H_
 #define _FASTD_CONFIG_H_
 
-#define FASTD_VERSION "@PROJECT_VERSION@"
+#define FASTD_VERSION "@FASTD_VERSION@"
 
 #cmakedefine WITH_CAPABILITIES
 
-- 
cgit v1.2.3