build: implement make dist using git-archive

Instead of jumping through hoops to get the ignore list
right just use git-archive to get a clean source tarball.

CMakeLists.txt

@@ -285,6 +285,14 @@ if(LUADOC_EXECUTABLE)
 endif()
 # }}}
 
+# {{{ dist tarball
+if(BUILD_FROM_GIT)
+    add_custom_target(dist
+        COMMAND ${SOURCE_DIR}/build-utils/dist.sh ${VERSION}
+        WORKING_DIRECTORY ${SOURCE_DIR})
+endif()
+# }}}
+
 # {{{ Installation.
 install(TARGETS ${PROJECT_AWE_NAME} ${PROJECT_AWECLIENT_NAME} RUNTIME DESTINATION bin)
 install(FILES ${AWE_LUA_FILES} DESTINATION ${AWESOME_REL_LUA_LIB_PATH})

awesomeConfig.cmake

@@ -1,7 +1,10 @@
 set(PROJECT_AWE_NAME awesome)
 set(PROJECT_AWECLIENT_NAME awesome-client)
 
-set(VERSION 3)
+# If ${SOURCE_DIR} is a git repository VERSION is set to
+# `git-describe` later.
+set(VERSION 3-devel)
+
 set(VERSION_MAJOR ${VERSION})
 set(VERSION_MINOR 0)
 set(VERSION_PATCH 0)
@@ -63,10 +66,8 @@ if(GENERATE_MANPAGES)
 endif()
 # }}}
 
-# {{{ git version stamp
-# If this is a git repository...
-if(EXISTS ${SOURCE_DIR}/.git/HEAD)
-    if(GIT_EXECUTABLE)
+# {{{ version stamp
+if(EXISTS ${SOURCE_DIR}/.git/HEAD AND GIT_EXECUTABLE)
     # get current version
     execute_process(
         COMMAND ${GIT_EXECUTABLE} describe
@@ -78,7 +79,9 @@ if(EXISTS ${SOURCE_DIR}/.git/HEAD)
     file(WRITE ${VERSION_STAMP_FILE} ${VERSION})
     # create a version_stamp target later
     set(BUILD_FROM_GIT TRUE)
-    endif()
+else()
+    # get version from version stamp
+    file(READ ${SOURCE_DIR}/.version_stamp VERSION LIMIT 128)
 endif()
 # }}}
 

build-utils/dist.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# $1 version to package
+
+set -e
+
+VERSION=$1
+git-archive --prefix=dist/awesome-$VERSION/ $VERSION | tar -xf -
+cd dist
+echo -n $VERSION > awesome-$VERSION/.version_stamp
+tar czf awesome-$VERSION.tar.gz awesome-$VERSION