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repo-wide: relicense under MIT, nixfmt-tree
We have communicated with UmbraLogic Technologies LLC (dba ChipFoundry), the current proprietor of Efabless Corporation assets, and they have agreed to relicense all Nix code in both https://github.com/efabless/nix-eda and all Nix code in https://github.com/efabless/openlane2 under the MIT license to be compatible with nixpkgs's license terms for upstreaming. We also adopted nixpkgs' code formatter. This should hopefully help us upstream some of the more… presentable files.
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Authors.md

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> https://github.com/fossi-foundation/nix-eda/graphs/contributors for a full list
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> of human contributors.
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* Efabless Corporation \<https://efabless.com\>
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(via https://github.com/efabless/nix-eda)
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* UmbraLogic Technologies LLC \<https://chipfoundry.io>
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* As owner of Efabless Corporation IP
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* Leo Moser \<[email protected]\>
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* Mohamed Gaber \<<[email protected]>\>
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## Special Thanks
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* Phillip Wagner \<[email protected]\> - for help setting up the
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Nix Cache
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* Jeffrey DiCorpo \<[email protected]\> - for agreeing to relicense under
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the MIT license so we would be able to upstream.

Contributing.md

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The CI will attempt to build them for the other three platforms: x86_64-darwin,
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aarch64-linux and aarch64-darwin, but if you have the capacity to test those
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builds yourselves, it will greatly speed up the PR
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process.
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builds yourselves, it will greatly speed up the PR process.
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Nix code must be formatted using `alejandra`: `nix fmt .`
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Nix code must be formatted using `nixfmt-tree`: just run `nix fmt .`
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## Submissions
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Make your changes and then submit them as a pull requests to the `main` branch.
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## Licensing and Copyright
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Please add your name and email (and/or employer) to [Authors.md](./Authors.md).
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Please note all code contributions must have the same license as nix-eda, i.e.,
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the standard MIT license as published by the Open-Source Initiative (OSI.)
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We request that your changes be under the ISC/MIT License.
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You, as the submitter of the patch, are responsible for your patch, regardless\
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of where that change came from; whether you:
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We intend to eventually, when all Efabless Code is rewritten, relicense this
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project under the ISC/MIT License in the hopes of upstreaming at least some of
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these derivations to nixpkgs proper.
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1. Wrote it yourself and are willing to release your changes under said license.
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2. Acquired it from other libre software with compatible license terms
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(and of course the requisite copyright notices.)
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3. Created using coding assistants, "Generative AI" software, or similar tools.
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For significant changes, please add either your or your employer's information
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to [Authors.md](./Authors.md).

License

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MIT License
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in the Software without restriction, including without limitation the rights
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

Readme.md

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See [docs/flake_api.md](./docs/flake_api.md).
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## ⚖️ License
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## ⚖️ License and Legal
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The combined work is available under the Apache License, version 2.0.
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See 'License'. See [Authors.md](./Authors.md) for a list of authors and
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copyright holders.
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We are eventually planning to relicense under the MIT License (to be compatible
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with nixpkgs upstream) and we kindly ask all new contributions to be under said
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license.
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nix-eda is available under the MIT license. See 'License'.
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Binary cache is hosted by the FOSSi Foundation.
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nix-eda is based on [nix-eda](https://github.com/efabless/nix-eda)
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by Efabless Corporation:
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nix-eda is based on [nix-eda](https://github.com/efabless/nix-eda) by Efabless
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Corporation, whose assets are currently owned by UmbraLogic Technologies LLC.
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UmbraLogic has agreed to relicense all code under the MIT license to be
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compatible with upstream nixpkgs, for which we are grateful.
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```
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Copyright 2024 Efabless Corporation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Copyright (c) 2025 UmbraLogic Technologies LLC:
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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```

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