LOOT is a plugin load order optimisation tool for Starfield, TES III: Morrowind, TES IV: Oblivion, TES V: Skyrim, TES V: Skyrim Special Edition, Fallout 3, Fallout: New Vegas, Fallout 4 and Fallout 4 VR. It is designed to assist mod users in avoiding detrimental conflicts, by automatically calculating a load order that satisfies all plugin dependencies and maximises each plugin's impact on the user's game.
LOOT also provides some load order error checking, including checks for requirements, incompatibilities and cyclic dependencies. In addition, it provides a large number of plugin-specific usage notes, bug warnings and Bash Tag suggestions.
libloot provides access to LOOT's metadata and sorting functionality, and the LOOT application is built using it.
Releases are hosted on GitHub.
Snapshot builds are available as artifacts from GitHub Actions runs, though they are only kept for 90 days and can only be downloaded when logged into a GitHub account. To mitigate these restrictions, snapshot build artifacts include a GPG signature that can be verified using the public key hosted here, which means it's possible to re-upload the artifacts elsewhere and still prove their authenticity.
The snapshot build artifacts are named like so:
libloot-<last tag>-<revisions since tag>-g<short revision ID>_<branch>-<platform>.<file extension>
Refer to .github/workflows/release.yml for the build process.
The build process assumes that you have already cloned the libloot repository, that the current working directory is its root, and that the following applications are already installed:
cmakecurlgitpip3(and therefore Python 3)cargoand the rest of the Rust toolchain (e.g. via rustup)wget
The list above may be incomplete.
libloot uses the following CMake variables to set build parameters:
| Parameter | Values | Default | Description |
|---|---|---|---|
BUILD_SHARED_LIBS |
ON, OFF |
ON |
Whether or not to build a shared libloot binary. |
LIBLOOT_BUILD_TESTS |
ON, OFF |
ON |
Whether or not to build libloot's tests. |
LIBLOOT_INSTALL_DOCS |
ON, OFF |
ON |
Whether or not to install libloot's docs (which need to be built separately). |
RUN_CLANG_TIDY |
ON, OFF |
OFF |
Whether or not to run clang-tidy during build. Has no effect when using CMake's MSVC generator. |
ESPLUGIN_URL |
A URL | A GitHub release archive URL | The URL to get a source code archive from. This can be used to supply a local path if the archive has already been downloaded (e.g. for offline builds). |
LIBLOADORDER_URL |
A URL | A GitHub release archive URL | The URL to get a source code archive from. This can be used to supply a local path if the archive has already been downloaded (e.g. for offline builds). |
LOOT_CONDITION_INTERPRETER_URL |
A URL | A GitHub release archive URL | The URL to get a source code archive from. This can be used to supply a local path if the archive has already been downloaded (e.g. for offline builds). |
You may also need to set BOOST_ROOT if CMake cannot find Boost.
The documentation is built using Doxygen, Breathe and Sphinx. Install Doxygen and Python and make sure they're accessible from your PATH, then run:
py -m venv .venv
.venv\Scripts\activate
pip install -r docs/requirements.txt
sphinx-build -b html docs build/docs/html
If running on Linux, replace .venv\Scripts\activate with .venv/bin/activate.
Alternatively, you can use Docker to avoid changing your development environment, by running docker run -it --rm -v ${PWD}/docs:/docs/docs -v ${PWD}/build:/docs/build -v ${PWD}/include:/docs/include sphinxdoc/sphinx:7.3.7 bash to obtain a shell that you can use to run apt-get update && apt-get install -y doxygen and then the two commands above.