lmdbal/README.md

# LMDBAL - Lightning Memory Data Base Abstraction Level

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### Prerequisites

- a compiler (c++ would do)
- Qt 5 or 6 or higher (qt5-base or qt6-base would do)
- lmdb
- CMake 3.16 or higher
- Doxygen (optional, for documentation)
- gtest (optional, for tests)

### 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

If you're using LMDBAL as a embeded library you might want to control it's build options, for example you can run
```
set(BUILD_STATIC ON)
```

before including the library in your project. This will set the library to be build in a static mode.

Then you want to run something like this
```
add_subdirectory(pathTo/yourEmbedded/libraries/lmdbal)
add_library(LMDBAL::LMDBAL ALIAS LMDBAL)
...

target_link_libraries(yourTarget PRIVATE LMDBAL::LMDBAL)
```

The headers are added as `PUBLIC` so you might not even need to `target_link_libraries` them

### 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`);
- `BUILD_DOC` - `True` build doxygen documentation, `False` does not (default is `False`);
- `BUILD_DOXYGEN_AWESOME` - `True` build doxygen awesome theme if `BUILD_DOC` is also `True` (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;
- `LMDBAL_NAME` - `LMDBAL` builds main target with this name, also install path witll be this name lowercase, usefull if you want to build `LMDBAL-QT6` not to conflict with `LMDBAL-QT5`;

#### 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 available under the GPL-3.0 License or any later version. The file [cmake/FindLMDB.cmake](cmake/FindLMDB.cmake) is available under the GPL-3.0 License only, - see the [LICENSE.md](LICENSE.md) file for details