Overview

This is a reimplementation from scratch of the C++ Hyperon prototype in the Rust programming language. This project replaces the previous prototype. See MeTTa scripts and Python examples to become familiar with Hyperon features.

If you find troubles with the installation, see the Troubleshooting section below.

Prepare environment

Manual installation

Install latest stable Rust, see Rust installation page. Python 3 (3.6 or later), GCC (7.5 or later) and CMake (3.10 or later) are required to build C and Python API.

Install cbindgen:

cargo install --force cbindgen

Install Conan and make default Conan profile:

python3 -m pip install conan==1.47
conan profile new --detect default

Install Python library and dependencies in development mode (execute following command in the top directory of repository):

python3 -m pip install -e ./python[dev]

Docker

A docker image can be used to run a reproducible environment. See instructions inside the Dockerfile. If the docker image doesn't work, please raise an issue.

Hyperon library

Build and test the library:

cd ./lib
cargo build
cargo test

To enable logging during tests execute:

RUST_LOG=hyperon=debug cargo test

Generate docs:

cd ./lib
cargo doc --no-deps

Docs can be found at ./lib/target/doc/hyperon/index.html.

C and Python API

Setup build:

mkdir -p build
cd build
cmake ..

To run release build use -DCMAKE_BUILD_TYPE=Release cmake flag.

Build and run tests:

make
make check

Running Python and MeTTa examples from command line

In order to run examples you need to add Python libraries into the PYTHONPATH after compilation:

cd build
export PYTHONPATH=$PYTHONPATH:`pwd`/python

Run MeTTa script from command line:

cd python/tests
python3 metta.py ./scripts/<name>.metta

Language support for IDEs [optional]

Different IDEs may require different tweaks to support the languages used in the codebase. The language servers which we use for development are:

• Rust Language Server;
• clangd, generate compile commands for the clangd using cmake variable:

  cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=Y ..
  

• Python LSP server.

Troubleshooting

Conan claims it cannot find out the version of the C compiler

If you see the following cmake output:

ERROR: Not able to automatically detect '/usr/bin/cc' version
ERROR: Unable to find a working compiler
WARN: Remotes registry file missing, creating default one in /root/.conan/remotes.json
ERROR: libcheck/0.15.2: 'settings.compiler' value not defined

Try to create the default Conan profile manually:

conan profile new --detect default

If it doesn't help, then try to manually add compiler, compiler.version and compiler.libcxx values in the default Conan profile (~/.conan/profiles/default). For example:

conan profile update settings.compiler=gcc default
conan profile update settings.compiler.version=7 default
conan profile update settings.compiler.libcxx=libstdc++ default

Rust compiler shows errors

Please ensure you are using the latest stable version:

rustup update stable