1 files changed, 66 insertions, 0 deletions
diff --git a/libevent/cmake/VersionViaGit.cmake b/libevent/cmake/VersionViaGit.cmake
new file mode 100644
index 0000000..24eb6af
--- /dev/null
+++ b/libevent/cmake/VersionViaGit.cmake
@@ -0,0 +1,66 @@
+# This module defines the following variables utilizing
+# git to determine the parent tag. And if found the macro
+# will attempt to parse them in the github tag fomat
+#
+# Useful for auto-versioning in our CMakeLists
+#
+#  EVENT_GIT___VERSION_MAJOR - Major version.
+#  EVENT_GIT___VERSION_MINOR - Minor version
+#  EVENT_GIT___VERSION_STAGE - Stage version
+#
+# Example usage:
+#
+# event_fuzzy_version_from_git()
+#    message("Libvent major=${EVENT_GIT___VERSION_MAJOR}")
+#    message("        minor=${EVENT_GIT___VERSION_MINOR}")
+#    message("        patch=${EVENT_GIT___VERSION_PATCH}")
+#    message("        stage=${EVENT_GIT___VERSION_STAGE}")
+# endif()
+
+include(FindGit)
+
+macro(event_fuzzy_version_from_git)
+	# set our defaults.
+	set(EVENT_GIT___VERSION_MAJOR 2)
+	set(EVENT_GIT___VERSION_MINOR 1)
+	set(EVENT_GIT___VERSION_PATCH 12)
+	set(EVENT_GIT___VERSION_STAGE "stable")
+
+	find_package(Git)
+
+	if (GIT_FOUND)
+		execute_process(
+			COMMAND
+				${GIT_EXECUTABLE} describe --abbrev=0 --always
+			WORKING_DIRECTORY
+				${PROJECT_SOURCE_DIR}
+			RESULT_VARIABLE
+				GITRET
+			OUTPUT_VARIABLE
+				GITVERSION
+			OUTPUT_STRIP_TRAILING_WHITESPACE
+		)
+
+		string(REGEX REPLACE "[\\._-]" ";" VERSION_LIST "${GITVERSION}")
+		if(VERSION_LIST)
+			list(LENGTH VERSION_LIST VERSION_LIST_LENGTH)
+		endif()
+
+		if ((GITRET EQUAL 0) AND (VERSION_LIST_LENGTH EQUAL 5))
+			list(GET VERSION_LIST 1 _MAJOR)
+			list(GET VERSION_LIST 2 _MINOR)
+			list(GET VERSION_LIST 3 _PATCH)
+			list(GET VERSION_LIST 4 _STAGE)
+
+			set(_DEFAULT_VERSION "${EVENT_GIT___VERSION_MAJOR}.${EVENT_GIT___VERSION_MINOR}.${EVENT_GIT___VERSION_PATCH}-${EVENT_GIT___VERSION_STAGE}")
+			set(_GIT_VERSION     "${_MAJOR}.${_MINOR}.${_PATCH}-${_STAGE}")
+
+			if (${_DEFAULT_VERSION} VERSION_LESS ${_GIT_VERSION})
+				set(EVENT_GIT___VERSION_MAJOR ${_MAJOR})
+				set(EVENT_GIT___VERSION_MINOR ${_MINOR})
+				set(EVENT_GIT___VERSION_PATCH ${_PATCH})
+				set(EVENT_GIT___VERSION_STAGE ${_STAGE})
+			endif()
+		endif()
+	endif()
+endmacro()