From: Erwin Janssen <erwinjanssen@outlook.com>
Date: Tue, 20 Dec 2016 19:38:45 +0000 (+0100)
Subject: CMake: Add Graphviz version information
X-Git-Tag: 2.42.0~213^2^2~30
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a5d8a8bd203b2d8a66b1b4940af46e3f9b8c0018;p=graphviz

CMake: Add Graphviz version information

Adds version numbers to the main CMakeLists.txt. The build version is set
to the date and time of the most recent commit, similar to the Autotools
build.
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ce651d04..1ee91e3fe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,31 @@
 cmake_minimum_required (VERSION 2.8 FATAL_ERROR)
 
+# Build dependencies
+# ==================
+find_package(Git REQUIRED)
+
+# General project information
+# ===========================
 project (Graphviz)
 
+set(GRAPHVIZ_VERSION_MAJROR 2)
+set(GRAPHVIZ_VERSION_MINOR 39)
+
+# Set GRAPHVIZ_VERSION_BUILD to time of last commit, or to 0 if that fails.
+execute_process(
+    COMMAND           "${GIT_EXECUTABLE}" log -n 1 --format=%cd --date=format:%Y%m%d.%H%M
+    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+    RESULT_VARIABLE   git_result
+    OUTPUT_VARIABLE   GRAPHVIZ_VERSION_BUILD
+    ERROR_VARIABLE    git_error
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    ERROR_STRIP_TRAILING_WHITESPACE
+)
+if(NOT git_result EQUAL 0)
+    message(WARNING "Failed to set build version: ${git_error}")
+    set(GRAPHVIZ_VERSION_BUILD 0)
+endif()
+
+message(STATUS "Graphviz version: ${GRAPHVIZ_VERSION_MAJROR}.${GRAPHVIZ_VERSION_MINOR}.${GRAPHVIZ_VERSION_BUILD}")
+
 add_subdirectory(lib)