cmake magick to make package usable and discoverable by another CMake projects, readme, pkgbuild

CMakeLists.txt

@@ -1,17 +1,18 @@
 cmake_minimum_required(VERSION 3.16)
 
-project(lmdbal VERSION 0.2.0 LANGUAGES CXX)
+project(LMDBAL VERSION 0.2.0 LANGUAGES CXX)
+string(TOLOWER ${PROJECT_NAME} PROJECT_LOW)
 
 cmake_policy(SET CMP0076 NEW)
 cmake_policy(SET CMP0079 NEW)
 
-option(BUILD_STATIC "Builds library as static library" ON)
-option(BUILD_TESTS "Builds tests" ON)
+option(BUILD_STATIC "Builds library as static library" OFF)
+option(BUILD_TESTS "Builds tests" OFF)
+
 include(GNUInstallDirs)
+include(CMakePackageConfigHelpers)
 
 set(CMAKE_AUTOMOC ON)
-set(CMAKE_AUTOUIC ON)
-set(CMAKE_AUTORCC ON)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
@@ -29,31 +30,64 @@ if (NOT CMAKE_BUILD_TYPE)
 endif ()
 
 if (BUILD_STATIC)
-  add_library(lmdbal STATIC ${SOURCES})
+  add_library(${PROJECT_NAME} STATIC)
 else ()
-  add_library(lmdbal SHARED ${SOURCES})
+  add_library(${PROJECT_NAME} SHARED)
 endif()
 
+set_property(TARGET ${PROJECT_NAME} PROPERTY VERSION ${version})
+set_property(TARGET ${PROJECT_NAME} PROPERTY SOVERSION 1)
+set_property(TARGET ${PROJECT_NAME} PROPERTY
+  INTERFACE_${PROJECT_NAME}_MAJOR_VERSION 1)
+set_property(TARGET ${PROJECT_NAME} APPEND PROPERTY
+  COMPATIBLE_INTERFACE_STRING ${PROJECT_NAME}_MAJOR_VERSION
+)
+
 add_subdirectory(src)
 
 if (BUILD_TESTS)
   add_subdirectory(test)
 endif ()
 
-target_include_directories(lmdbal PUBLIC ${CMAKE_SOURCE_DIR}/src)
-target_include_directories(lmdbal PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
-target_include_directories(lmdbal PRIVATE ${Qt${QT_VERSION_MAJOR}_INCLUDE_DIRS})
-target_include_directories(lmdbal PRIVATE ${Qt${QT_VERSION_MAJOR}Core_INCLUDE_DIRS})
-
-target_link_libraries(lmdbal
-  PRIVATE
-  Qt${QT_VERSION_MAJOR}::Core
+target_include_directories(${PROJECT_NAME} PUBLIC
+                           "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>"
+                           "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_LOW}>"
 )
-target_link_libraries(lmdbal PRIVATE lmdb)
+target_include_directories(${PROJECT_NAME} PRIVATE ${Qt${QT_VERSION_MAJOR}_INCLUDE_DIRS})
+target_include_directories(${PROJECT_NAME} PRIVATE ${Qt${QT_VERSION_MAJOR}Core_INCLUDE_DIRS})
 
-install(TARGETS lmdbal
+target_link_libraries(${PROJECT_NAME} PRIVATE
+                      Qt${QT_VERSION_MAJOR}::Core
+                      lmdb
+)
+
+configure_package_config_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/Config.cmake.in
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_LOW}Config.cmake"
+    INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_LOW}
+)
+
+write_basic_package_version_file(
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_LOW}ConfigVersion.cmake"
+    VERSION "${version}"
+    COMPATIBILITY AnyNewerVersion
+)
+
+install(TARGETS ${PROJECT_NAME}
+        EXPORT ${PROJECT_LOW}Targets
         RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/lmdbal
-        PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/lmdbal
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/${PROJECT_LOW}
+        INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_LOW}
 )
 
+install(EXPORT ${PROJECT_LOW}Targets
+        FILE ${PROJECT_LOW}Targets.cmake
+        NAMESPACE ${PROJECT_NAME}::
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_LOW}
+)
+
+install(FILES
+          "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_LOW}Config.cmake"
+          "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_LOW}ConfigVersion.cmake"
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_LOW}
+)

README.md

@@ -0,0 +1,77 @@
+# LMDBAL - Lightning Memory Data Base Abstraction Level
+
+[![AUR license](https://img.shields.io/aur/license/lmdbal?style=flat-square)](https://git.macaw.me/blue/lmdbal/raw/branch/master/LICENSE.md)
+[![AUR version](https://img.shields.io/aur/version/lmdbal?style=flat-square)](https://aur.archlinux.org/packages/lmdbal/)
+[![Liberapay patrons](https://img.shields.io/liberapay/patrons/macaw.me?logo=liberapay&style=flat-square)](https://liberapay.com/macaw.me)
+
+### Prerequisites
+
+- QT 5 *(lower versions might work but it wasn't tested)*
+- lmdb
+- CMake 3.16 or higher
+
+### Using with CMake
+
+#### As a system library
+
+If you're using LMDBAL as a system library you probably have no control over it's build options. The easiest way to include the project is to add following
+
+```
+find_package(lmdbal)
+if (LMDBAL_FOUND)
+    target_include_directories(yourTarget PRIVATE {LMDBAL_INCLUDE_DIRS})
+    target_link_libraries(yourTarget PRIVATE LMDBAL::LMDBAL)
+endif()
+```
+
+#### As an embeded subproject
+//TODO
+
+### Building
+
+LMDBAL uses CMake as a build system.
+
+Please check the prerequisites and install them before building.
+
+Here is an easy way to build a project
+
+```
+$ git clone https://git.macaw.me/blue/lmdbal
+$ cd lmdbal
+$ mkdir build
+$ cd build
+$ cmake .. [ *optional keys* ]
+$ cmake --build .
+$ cmake --install . --prefix install
+```
+
+This way will create you a `lmdbal/build` directory with temporary files, and `lmdbal/build/install` with all the export files for installation to the system.
+
+After `cmake ..` you can specify keys to alter the building process. In this context building keys are transfered like so
+
+```
+cmake .. -D KEY1=VALUE1 -D KEY2=VALUE2 ...
+```
+
+#### List of keys
+
+Here is the list of keys you can pass to configuration phase of `cmake ..`:
+
+- `CMAKE_BUILD_TYPE` - `Debug` just builds showing all warnings, `Release` builds with no warnings and applies optimizations (default is `Debug`);
+- `BUILD_STATIC` - `True` builds project as a static library, `False` builds as dynamic (default is `False`);
+- `BUILD_TESTS` - `True` build unit tests, `False` does not (default is `False`);
+- `QT_VERSION_MAJOR` - `5` links against Qt5, `6` links agains Qt6, there is no default, so, if you didn't specify it the project will chose automatically;
+
+#### Running tests
+
+If you built the library with `-D BUILD_TESTS=True`, then there will be `lmdbal/build/tests/runUnitTests` executable file. You can simply run it as
+
+```
+./runUnitTests
+```
+
+if you're in the same directory with it
+
+## License
+
+This project is licensed under the GPLv3 License - see the [LICENSE.md](LICENSE.md) file for details

cmake/Config.cmake.in

@@ -0,0 +1,5 @@
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/lmdbalTargets.cmake")
+
+check_required_components(lmdbal)

packaging/Archlinux/PKGBUILD

@@ -0,0 +1,23 @@
+# Maintainer: Yury Gubich <blue@macaw.me>
+pkgname=lmdbal
+pkgver=0.2.0
+pkgrel=1
+pkgdesc="LMDB Abstraction Layer, qt5 version"
+arch=('i686' 'x86_64')
+url="https://git.macaw.me/blue/lmdbal"
+license=('GPL3')
+depends=( 'lmdb' 'qt5-base')
+makedepends=('cmake>=3.16')
+optdepends=()
+
+source=("$pkgname-$pkgver.tar.gz")
+sha256sums=('SKIP')
+build() {
+        cd "$srcdir/$pkgname"
+        cmake . -D CMAKE_INSTALL_PREFIX=/usr -D CMAKE_BUILD_TYPE=Release -D QT_VERSION_MAJOR=5
+        cmake --build .
+}
+package() {
+        cd "$srcdir/$pkgname"
+        DESTDIR="$pkgdir/" cmake --install .
+}

src/CMakeLists.txt

@@ -29,9 +29,9 @@ set(HEADERS
   operators.hpp
 )
 
-target_sources(lmdbal PRIVATE
+target_sources(${PROJECT_NAME} PRIVATE
     ${SOURCES}
     ${HEADERS}
 )
 
-set_target_properties(lmdbal PROPERTIES PUBLIC_HEADER "${HEADERS}")
+install(FILES ${HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_LOW})

test/CMakeLists.txt

@@ -15,7 +15,7 @@ target_include_directories(runUnitTests PRIVATE ${Qt${QT_VERSION_MAJOR}Core_INCL
 target_link_libraries(
   runUnitTests
   GTest::gtest_main
-  lmdbal
+  ${PROJECT_NAME}
 )
 
 include(GoogleTest)