Candlex: an Nx.Backend for candle ML framework

candlex/.formatter.exs

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+# Used by "mix format"
+[
+  import_deps: [:nx],
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

candlex/.gitignore

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+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+candlex-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
+
+# Shared objects build by Rust.
+*.so

candlex/CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.2] - 2023-10-30
+
+### Added
+
+- Precompiled binaries for a few CPU targets.

candlex/LICENSE

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+
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candlex/README.md

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+# Candlex
+
+[![ci](https://github.com/mimiquate/candlex/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/mimiquate/candlex/actions?query=branch%3Amain)
+[![Hex.pm](https://img.shields.io/hexpm/v/candlex.svg)](https://hex.pm/packages/candlex)
+[![Docs](https://img.shields.io/badge/docs-gray.svg)](https://hexdocs.pm/candlex)
+
+An `Nx` [backend](https://hexdocs.pm/nx/Nx.html#module-backends) for [candle](https://huggingface.github.io/candle) machine learning minimalist framework
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `candlex` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:candlex, "~> 0.1.2"}
+  ]
+end
+```
+
+Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
+and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
+be found at <https://hexdocs.pm/candlex>.
+
+## Usage
+
+Just configure Nx to default to Candlex backend in your configuration:
+
+```elixir
+# Possibly config/runtime.exs
+
+config :nx, default_backend: Candlex.Backend
+```
+
+or in your scripts, precede all your Nx operations with:
+
+```elixir
+Nx.default_backend(Candlex.Backend)
+```
+
+More details in [Nx backends](https://hexdocs.pm/nx/Nx.html#module-backends)
+
+#### `CANDLEX_NIF_BUILD`
+
+Defaults to `false`. If `true` the native binary is built locally, which may be useful
+if no precompiled binary is available for your target environment. Once set, you
+must run `mix deps.clean candlex --build` explicitly to force to recompile.
+Building has a number of dependencies, see *Building from source* below.
+
+## Building from source
+
+To build the native binary locally you need to set `CANDLEX_NIF_BUILD=true`.
+Keep in mind that the compilation usually takes time.
+
+You will need the following installed in your system for the compilation:
+
+  * [Git](https://git-scm.com) for fetching candle-core source
+  * [Rust](https://www.rust-lang.org) with cargo to compile rustler NIFs
+
+## Releasing
+
+To publish a new version of this package:
+
+1. Update `@version` in `mix.exs` and `project-version` in `.github/workflows/binaries.yml`.
+1. `git tag -s <tag-version>` to create new signed tag.
+1. `git push origin <tag-version>` to push the tag.
+1. Wait for the `binaries.yml` GitHub workflow to build all the NIF binaries.
+1. `mix rustler_precompiled.download Candlex.Native --all --print` to generate binaries checksums locally.
+1. `rm -r native/candlex/target` to leave out rust crate build artifacts from published elixir package.
+1. `mix hex.build --unpack` to check the package includes the correct files.
+1. Publish the release from draft in GitHub.
+1. `mix hex.publish` to publish package to Hex.pm.
+
+## License
+
+Copyright 2023 Mimiquate
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

candlex/config/config.exs

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+import Config
+
+enable_cuda =
+  case System.get_env("CUDA") do
+    nil -> System.find_executable("nvcc") && System.find_executable("nvidia-smi")
+    "false" -> false
+    _ -> true
+  end
+
+crate_features =
+  if enable_cuda do
+    [:cuda]
+  else
+    []
+  end
+
+config :candlex, crate_features: crate_features