Print Git Commit Hash to Output

CMakeLists.txt

@@ -16,6 +16,15 @@ set(PACKAGE_STRING "ALARA ${PACKAGE_VERSION}")
 set(DFLT_DATADIR ${CMAKE_INSTALL_PREFIX}/data)
 set(DFLT_XSDIR   ${CMAKE_INSTALL_PREFIX}/data)
 
+set(GIT_HASH_HEADER "${CMAKE_CURRENT_BINARY_DIR}/git_hash.h")
+
+add_custom_target(update_git_hash ALL
+    COMMAND ${CMAKE_COMMAND}
+        -DSOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}
+        -DOUTPUT_FILE=${GIT_HASH_HEADER}
+        -P ${CMAKE_CURRENT_SOURCE_DIR}/FindGitHash.cmake
+)
+
 # Build ALARA executable
 add_subdirectory(src)
 
@@ -26,4 +35,4 @@ add_subdirectory(tools)
 add_subdirectory(data)
 
 # Install sample files
-add_subdirectory(sample)
+add_subdirectory(sample)

FindGitHash.cmake

@@ -0,0 +1,11 @@
+execute_process(
+    COMMAND git log -1 --format=%H
+    WORKING_DIRECTORY "${SOURCE_DIR}"
+    OUTPUT_VARIABLE GIT_COMMIT_HASH
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
+file(WRITE "${OUTPUT_FILE}"
+    "#pragma once\n"
+    "#define GIT_COMMIT_HASH \"${GIT_COMMIT_HASH}\"\n"
+)

src/CMakeLists.txt

@@ -8,7 +8,12 @@ configure_file(dflt_datadir.h.in dflt_datadir.h)
 # Location of header files
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
+include_directories(${CMAKE_BINARY_DIR})
 
 # ALARA executable
 add_executable(alara ${SRC_FILES})
+
+# Make sure the Git hash is generated before compiling ALARA
+add_dependencies(alara update_git_hash)
+
 install(TARGETS alara DESTINATION bin)

src/alara.C

@@ -1,6 +1,6 @@
 /* $Id: alara.C,v 1.20 2004-07-29 19:24:10 wilsonp Exp $ */
 #include "alara.h"
-
+#include "git_hash.h"
 #include "Input.h"
 #include "Root.h"
 #include "Statistics.h"
@@ -181,6 +181,7 @@ int main(int argc, char *argv[])
   Input problemInput(inFname);
 
   /* INPUT */
+  verbose(-1, "The version of ALARA used to run this simulation was built with Git commit: %s", GIT_COMMIT_HASH);
   verbose(0,"Starting problem input processing.");
   verbose(1,"Reading input.");
   problemInput.read();

src/config.h.in

@@ -1 +1,2 @@
 #define PACKAGE_STRING "${PACKAGE_STRING}"
+#define GIT_COMMIT_HASH "${GIT_COMMIT_HASH}"