cmake: use relative paths

CMakeLists.txt

@@ -1,11 +1,31 @@
 cmake_minimum_required(VERSION 3.19)
-project(caelestia-shell VERSION "0.0.1")
+
+if(NOT DEFINED VERSION)
+    execute_process(COMMAND git describe --tags --abbrev=0
+        WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+        OUTPUT_VARIABLE VERSION
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    if("${VERSION}" STREQUAL "")
+        message(FATAL_ERROR "VERSION is not set and failed to get from git")
+    endif()
+
+    string(REGEX REPLACE "^v" "" VERSION "${VERSION}")
+endif()
+
+project(caelestia-shell VERSION ${VERSION} LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(INSTALL_LIBDIR "/usr/lib/caelestia" CACHE STRING "Library install dir")
-set(INSTALL_QMLDIR "/usr/lib/qt6/qml" CACHE STRING "QML install dir")
-set(INSTALL_QSCONFDIR "/etc/xdg/quickshell/caelestia" CACHE STRING "Quickshell config install dir")
+set(CPACK_GENERATOR "STGZ;TGZ")
+set(CPACK_PACKAGE_FILE_NAME "${PROJECT_NAME}-${VERSION}")
+set(CPACK_PACKAGE_DIRECTORY "${CMAKE_BINARY_DIR}/packages")
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
+
+set(INSTALL_LIBDIR "usr/lib/caelestia" CACHE STRING "Library install dir")
+set(INSTALL_QMLDIR "usr/lib/qt6/qml" CACHE STRING "QML install dir")
+set(INSTALL_QSCONFDIR "etc/xdg/quickshell/caelestia" CACHE STRING "Quickshell config install dir")
 
 add_compile_options(-Wall -Wextra)
 
@@ -16,3 +36,5 @@ foreach(dir assets components config modules services utils)
     install(DIRECTORY ${dir} DESTINATION "${INSTALL_QSCONFDIR}")
 endforeach()
 install(FILES shell.qml LICENSE DESTINATION "${INSTALL_QSCONFDIR}")
+
+include(CPack)

README.md

@@ -71,7 +71,7 @@ cd $XDG_CONFIG_HOME/quickshell
 git clone https://github.com/caelestia-dots/shell.git caelestia
 
 cd caelestia
-cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
+cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/
 cmake --build build
 sudo cmake --install build
 ```