Added global var for build revision.

Part of #321.

CMakeLists.txt

@@ -3,6 +3,26 @@
 # PROJECT_ARCH = the build architecture
 # LIBESPM_ROOT = the path to the root of the libespm source.
 
+##############################
+# Get Build Revision
+##############################
+
+# Uses the CMake module in this repo: https://github.com/rpavlik/cmake-modules
+# On Windows, this requires the msysgit install of Git, as the script won't find
+# the one bundled with GitHub for Windows.
+
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_BINARY_DIR})
+include(GetGitRevisionDescription)
+git_describe(GIT_COMMIT_STRING --tags --long)
+
+# We just want the shortened commit ID, so get that.
+string(FIND ${GIT_COMMIT_STRING} "-g" REV_POS REVERSE)
+MATH(EXPR REV_POS "${REV_POS} + 2")
+string(SUBSTRING ${GIT_COMMIT_STRING} ${REV_POS} -1 GIT_COMMIT_STRING)
+
+# Write to file.
+configure_file("${CMAKE_SOURCE_DIR}/src/backend/globals.cpp.in" "${CMAKE_BINARY_DIR}/generated/globals.cpp" @ONLY)
+
 ##############################
 # General Settings
 ##############################
@@ -56,10 +76,10 @@ find_package(GTest)
 set (LOOT_SRC   "${CMAKE_SOURCE_DIR}/src/backend/metadata.cpp"
                 "${CMAKE_SOURCE_DIR}/src/backend/game.cpp"
                 "${CMAKE_SOURCE_DIR}/src/backend/helpers.cpp"
-                "${CMAKE_SOURCE_DIR}/src/backend/globals.cpp"
                 "${CMAKE_SOURCE_DIR}/src/backend/generators.cpp"
                 "${CMAKE_SOURCE_DIR}/src/backend/graph.cpp"
-                "${CMAKE_SOURCE_DIR}/src/backend/git.cpp")
+                "${CMAKE_SOURCE_DIR}/src/backend/git.cpp"
+                "${CMAKE_BINARY_DIR}/generated/globals.cpp")
 
 set (LOOT_HEADERS "${CMAKE_SOURCE_DIR}/src/backend/metadata.h"
                 "${CMAKE_SOURCE_DIR}/src/backend/game.h"

src/backend/globals.cpp.in

@@ -22,8 +22,8 @@
     <http://www.gnu.org/licenses/>.
     */
 
-#include "globals.h"
-#include "helpers.h"
+#include "backend/globals.h"
+#include "backend/helpers.h"
 
 namespace loot {
     //Version numbers.
@@ -31,6 +31,9 @@ namespace loot {
     const unsigned int g_version_minor = 7;
     const unsigned int g_version_patch = 0;
 
+    // Build revision
+    const char * g_build_revision = "@GIT_COMMIT_STRING@";
+
     //Common paths.
     const boost::filesystem::path g_path_readme         = boost::filesystem::current_path() / "docs" / "LOOT Readme.html";
     const boost::filesystem::path g_path_report         = boost::filesystem::current_path() / "resources" / "report" / "report.html";

src/backend/globals.h

@@ -33,6 +33,9 @@ namespace loot {
     extern const unsigned int g_version_minor;
     extern const unsigned int g_version_patch;
 
+    // Build revision
+    extern const char * g_build_revision;
+
     //Common paths.
     extern const boost::filesystem::path g_path_readme;
     extern const boost::filesystem::path g_path_report;

src/gui/app.cpp

@@ -183,6 +183,7 @@ namespace loot {
 
         // Log some useful info.
         BOOST_LOG_TRIVIAL(info) << "LOOT Version: " << g_version_major << "." << g_version_minor << "." << g_version_patch;
+        BOOST_LOG_TRIVIAL(info) << "LOOT Build Revision: " << g_build_revision;
 #ifdef _WIN32
         // Check if LOOT is being run through Mod Organiser.
         bool runFromMO = GetModuleHandle(ToWinWide("hook.dll").c_str()) != NULL;