Squashed 'third_party/google-benchmark/' content from commit 785e2c3
Change-Id: Iaaca5eca89f717081452e643a233e86425b03e89
git-subtree-dir: third_party/google-benchmark
git-subtree-split: 785e2c3158589e8ef48c59ba80e48d76bdbd8902
diff --git a/cmake/GetGitVersion.cmake b/cmake/GetGitVersion.cmake
new file mode 100644
index 0000000..4f10f22
--- /dev/null
+++ b/cmake/GetGitVersion.cmake
@@ -0,0 +1,54 @@
+# - 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 --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8
+ WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+ RESULT_VARIABLE status
+ OUTPUT_VARIABLE GIT_VERSION
+ ERROR_QUIET)
+ if(${status})
+ set(GIT_VERSION "v0.0.0")
+ else()
+ string(STRIP ${GIT_VERSION} GIT_VERSION)
+ string(REGEX REPLACE "-[0-9]+-g" "-" GIT_VERSION ${GIT_VERSION})
+ endif()
+
+ # Work out if the repository is dirty
+ execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
+ WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+ OUTPUT_QUIET
+ ERROR_QUIET)
+ execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
+ WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+ OUTPUT_VARIABLE GIT_DIFF_INDEX
+ ERROR_QUIET)
+ string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
+ if (${GIT_DIRTY})
+ set(GIT_VERSION "${GIT_VERSION}-dirty")
+ endif()
+ else()
+ set(GIT_VERSION "v0.0.0")
+ endif()
+
+ message(STATUS "git Version: ${GIT_VERSION}")
+ set(${var} ${GIT_VERSION} PARENT_SCOPE)
+endfunction()