added missing files needed to get git revision.

cmake/configure_musrfit_version_file.cmake.in

@@ -0,0 +1,30 @@
+# configure_musrfit_version_file.cmake.in:
+set(SRC_DIR "@CMAKE_SOURCE_DIR@")
+set(BIN_DIR "@CMAKE_CURRENT_BINARY_DIR@")
+
+# Set variables
+set(CMAKE_INSTALL_PREFIX "@CMAKE_INSTALL_PREFIX@")
+set(MUSRFIT_VERSION "@MUSRFIT_VERSION@")
+
+# Get the current working branch
+execute_process(
+  COMMAND git 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 log -1 --pretty="%h, %ci"
+  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+  OUTPUT_VARIABLE GIT_CURRENT_SHA1
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
+configure_file(
+  ${SRC_DIR}/cmake/git-revision.h.in
+  ${BIN_DIR}/git-revision.h
+  @ONLY
+)
+# EOF

cmake/git-revision.h.in

@@ -0,0 +1,8 @@
+#ifndef GIT_VERSION_H
+#define GIT_VERSION_H
+
+#define GIT_BRANCH "@GIT_BRANCH@"
+#define GIT_CURRENT_SHA1 @GIT_CURRENT_SHA1@
+
+#endif // GIT_VERSION_H
+