Use BM_PLUGIN_VERSION for renderers.

CMake/GetGitRevisionDescription.cmake

@@ -0,0 +1,130 @@
+# - Returns a version string from Git
+#
+# These functions force a re-configure on each git commit so that you can
+# trust the values of the variables in your build system.
+#
+#  get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...])
+#
+# Returns the refspec and sha hash of the current head revision
+#
+#  git_describe(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe on the source tree, and adjusting
+# the output so that it tests false if an error occurs.
+#
+#  git_get_exact_tag(<var> [<additional arguments to git describe> ...])
+#
+# Returns the results of git describe --exact-match on the source tree,
+# and adjusting the output so that it tests false if there was no exact
+# matching tag.
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+if(__get_git_revision_description)
+	return()
+endif()
+set(__get_git_revision_description YES)
+
+# We must run the following at "include" time, not at function call time,
+# to find the path to this module rather than the path to a calling list file
+get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH)
+
+function(get_git_head_revision _refspecvar _hashvar)
+	set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+	set(GIT_DIR "${GIT_PARENT_DIR}/.git")
+	while(NOT EXISTS "${GIT_DIR}")	# .git dir not found, search parent directories
+		set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}")
+		get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH)
+		if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT)
+			# We have reached the root directory, we are not in git
+			set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+			set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE)
+			return()
+		endif()
+		set(GIT_DIR "${GIT_PARENT_DIR}/.git")
+	endwhile()
+	# check if this is a submodule
+	if(NOT IS_DIRECTORY ${GIT_DIR})
+		file(READ ${GIT_DIR} submodule)
+		string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_RELATIVE ${submodule})
+		get_filename_component(SUBMODULE_DIR ${GIT_DIR} PATH)
+		get_filename_component(GIT_DIR ${SUBMODULE_DIR}/${GIT_DIR_RELATIVE} ABSOLUTE)
+	endif()
+	set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data")
+	if(NOT EXISTS "${GIT_DATA}")
+		file(MAKE_DIRECTORY "${GIT_DATA}")
+	endif()
+
+	if(NOT EXISTS "${GIT_DIR}/HEAD")
+		return()
+	endif()
+	set(HEAD_FILE "${GIT_DATA}/HEAD")
+	configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY)
+
+	configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in"
+		"${GIT_DATA}/grabRef.cmake"
+		@ONLY)
+	include("${GIT_DATA}/grabRef.cmake")
+
+	set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE)
+	set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE)
+endfunction()
+
+function(git_describe _var)
+	if(NOT GIT_FOUND)
+		find_package(Git QUIET)
+	endif()
+	get_git_head_revision(refspec hash)
+	if(NOT GIT_FOUND)
+		set(${_var} "GIT-NOTFOUND" PARENT_SCOPE)
+		return()
+	endif()
+	if(NOT hash)
+		set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE)
+		return()
+	endif()
+
+	# TODO sanitize
+	#if((${ARGN}" MATCHES "&&") OR
+	#	(ARGN MATCHES "||") OR
+	#	(ARGN MATCHES "\\;"))
+	#	message("Please report the following error to the project!")
+	#	message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}")
+	#endif()
+
+	#message(STATUS "Arguments to execute_process: ${ARGN}")
+
+	execute_process(COMMAND
+		"${GIT_EXECUTABLE}"
+		describe
+		${hash}
+		${ARGN}
+		WORKING_DIRECTORY
+		"${CMAKE_SOURCE_DIR}"
+		RESULT_VARIABLE
+		res
+		OUTPUT_VARIABLE
+		out
+		ERROR_QUIET
+		OUTPUT_STRIP_TRAILING_WHITESPACE)
+	if(NOT res EQUAL 0)
+		set(out "${out}-${res}-NOTFOUND")
+	endif()
+
+	set(${_var} "${out}" PARENT_SCOPE)
+endfunction()
+
+function(git_get_exact_tag _var)
+	git_describe(out --exact-match ${ARGN})
+	set(${_var} "${out}" PARENT_SCOPE)
+endfunction()

CMake/GetGitRevisionDescription.cmake.in

@@ -0,0 +1,38 @@
+# 
+# Internal file for GetGitRevisionDescription.cmake
+#
+# Requires CMake 2.6 or newer (uses the 'function' command)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+set(HEAD_HASH)
+
+file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024)
+
+string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS)
+if(HEAD_CONTENTS MATCHES "ref")
+	# named branch
+	string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}")
+	if(EXISTS "@GIT_DIR@/${HEAD_REF}")
+		configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
+	elseif(EXISTS "@GIT_DIR@/logs/${HEAD_REF}")
+		configure_file("@GIT_DIR@/logs/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
+		set(HEAD_HASH "${HEAD_REF}")
+	endif()
+else()
+	# detached HEAD
+	configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
+endif()
+
+if(NOT HEAD_HASH)
+	file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
+	string(STRIP "${HEAD_HASH}" HEAD_HASH)
+endif()

CMakeLists.txt

@@ -1,11 +1,14 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 PROJECT(bemenu)
-INCLUDE(CTest)
 SET(BEMENU_NAME "bemenu")
 SET(BEMENU_DESCRIPTION "Dynamic menu library and client program inspired by dmenu")
 SET(BEMENU_VERSION "1.0.0")
 SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${bemenu_SOURCE_DIR}/CMake)
 
+INCLUDE(CTest)
+INCLUDE(GetGitRevisionDescription)
+get_git_head_revision(GIT_REFSPEC GIT_SHA1)
+
 # C99
 ADD_DEFINITIONS(-std=c99)
 

lib/internal.h

@@ -73,7 +73,7 @@ struct render_api {
 
     /**
      * Version of the plugin.
-     * Should match BM_VERSION or failure.
+     * Should match BM_PLUGIN_VERSION or failure.
      */
     const char *version;
 

lib/library.c

@@ -34,24 +34,28 @@ load(const char *file, struct bm_renderer *renderer)
 
     const char* (*regfun)(struct render_api*);
     if (!(regfun = chckDlLoadSymbol(handle, "register_renderer", &error)))
-        goto fail;
+        goto load_fail;
 
     const char *name;
     if (!(name = regfun(&renderer->api)))
         goto fail;
 
-    if (strcmp(renderer->api.version, BM_VERSION))
-        goto fail;
+    if (strcmp(renderer->api.version, BM_PLUGIN_VERSION))
+        goto mismatch_fail;
 
     renderer->handle = handle;
     renderer->name = bm_strdup(name);
     renderer->file = bm_strdup(file);
     return true;
 
+load_fail:
+    fprintf(stderr, "%s\n", error);
+    goto fail;
+mismatch_fail:
+    fprintf(stderr, "%s: version mismatch (%s != %s)\n", name, renderer->api.version, BM_PLUGIN_VERSION);
 fail:
     if (handle)
         chckDlUnload(handle);
-    fprintf(stderr, "%s\n", error);
     return false;
 }
 

lib/renderers/curses/curses.c

@@ -343,7 +343,7 @@ register_renderer(struct render_api *api)
     api->poll_key = poll_key;
     api->render = render;
     api->prioritory = BM_PRIO_TERMINAL;
-    api->version = BM_VERSION;
+    api->version = BM_PLUGIN_VERSION;
     return "curses";
 }
 

lib/renderers/wayland/wayland.c

@@ -144,7 +144,7 @@ register_renderer(struct render_api *api)
     api->poll_key = poll_key;
     api->render = render;
     api->prioritory = BM_PRIO_GUI;
-    api->version = BM_VERSION;
+    api->version = BM_PLUGIN_VERSION;
     return "wayland";
 }
 

lib/version.h.in

@@ -1,4 +1,5 @@
 #define INSTALL_PREFIX "@CMAKE_INSTALL_PREFIX@"
 #define BM_VERSION "@BEMENU_VERSION@"
+#define BM_PLUGIN_VERSION "@BEMENU_VERSION@-@GIT_SHA1@"
 
 /* vim: set ts=8 sw=4 tw=0 :*/