init repo.

third_party/benchmark/cmake/GetGitVersion.cmake

@@ -0,0 +1,36 @@
+# - Returns a version string from Git tags
+#
+# This function inspects the annotated git tags for the project and returns a string
+# into a CMake variable
+#
+#  get_git_version(<var>)
+#
+# - Example
+#
+# include(GetGitVersion)
+# get_git_version(GIT_VERSION)
+#
+# Requires CMake 2.8.11+
+find_package(Git)
+
+if(__get_git_version)
+  return()
+endif()
+set(__get_git_version INCLUDED)
+
+function(get_git_version var)
+  if(GIT_EXECUTABLE)
+      execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8 --dirty
+          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+          RESULT_VARIABLE status
+          OUTPUT_VARIABLE GIT_VERSION
+          ERROR_QUIET)
+      if(status)
+          set(GIT_VERSION "v0.0.0")
+      endif()
+  else()
+      set(GIT_VERSION "v0.0.0")
+  endif()
+
+  set(${var} ${GIT_VERSION} PARENT_SCOPE)
+endfunction()