From 18c4b1aa6d84fcf828f474c100f880569c7b9d04 Mon Sep 17 00:00:00 2001
From: Phillip Stephens <antidote.crk@gmail.com>
Date: Thu, 19 Nov 2015 23:33:09 -0800
Subject: [PATCH] Add git revision

---
 .gitignore     |  3 ++-
 CMakeLists.txt | 13 +++++++++++++
 version.h.in   |  7 +++++++
 3 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 version.h.in

diff --git a/.gitignore b/.gitignore
index 8b95cebeb..dca2e8836 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-*.user
\ No newline at end of file
+version.h
+*.user
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 427882182..9af16f282 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,3 +44,16 @@ add_subdirectory(DataSpec)
 if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
 add_subdirectory(Runtime)
 endif()
+
+find_package(Git)
+if(GIT_FOUND)
+  message("git found: ${GIT_EXECUTABLE}")
+    # Get the current working branch
+    execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref HEAD WORKING_DIRECTORY ${CMAKE_SOURCE_DIR} OUTPUT_VARIABLE GIT_BRANCH OUTPUT_STRIP_TRAILING_WHITESPACE )
+
+    # Get the latest abbreviated commit hash of the working branch
+    execute_process(COMMAND ${GIT_EXECUTABLE} log -1 --format=%h WORKING_DIRECTORY ${CMAKE_SOURCE_DIR} OUTPUT_VARIABLE GIT_COMMIT_HASH OUTPUT_STRIP_TRAILING_WHITESPACE)
+    execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse HEAD WORKING_DIRECTORY ${CMAKE_SOURCE_DIR} OUTPUT_VARIABLE GIT_COMMIT_HASH_FULL OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+    configure_file(${CMAKE_SOURCE_DIR}/version.h.in ${CMAKE_SOURCE_DIR}/version.h)
+endif()
diff --git a/version.h.in b/version.h.in
new file mode 100644
index 000000000..79abdedab
--- /dev/null
+++ b/version.h.in
@@ -0,0 +1,7 @@
+#ifndef VERSION_H
+#define VERSION_H
+
+#define GIT_BRANCH "@GIT_BRANCH@"
+#define GIT_COMMIT_HASH "@GIT_COMMIT_HASH@"
+#define GIT_COMMIT_HASH_FULL "@GIT_COMMIT_HASH_FULL@"
+#endif