MIT X11 License

License

Haskell on Heroku is released under the MIT X11 License.

Copyright (c) <year> <copyright holders>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

The buildpack uses Halcyon to install apps and development tools, including GHC and Cabal. For full project details, visit the home page.

The Haskell on Heroku project provides a buildpack that simplifies deploying Haskell applications to the Heroku platform. The license page documents the legal terms under which this software is distributed. By choosing the MIT X11 License, the project ensures that developers can freely use, modify, and share the buildpack code without restrictive barriers. This aligns with the open-source ethos that underpins many Haskell tools and libraries. Understanding the licensing terms is important for anyone who wishes to incorporate this buildpack into their own deployment workflows or contribute improvements back to the project. The license grants broad permissions while protecting the original authors from liability.

The MIT X11 License is a permissive open-source license that allows developers to use the buildpack in both commercial and non-commercial projects. Under this license, users can copy, modify, merge, publish, distribute, and sell copies of the software, provided they include the original copyright notice and permission statement in all copies or substantial portions. This simplicity makes it a popular choice among Haskell and Heroku developers who want to focus on building applications rather than navigating complex legal restrictions. The license covers the buildpack code, documentation, and associated files that make up the Haskell on Heroku deployment toolchain.

Deploying Haskell applications on Heroku involves coordinating several tools, including GHC and Cabal, through the buildpack system. The MIT X11 License ensures that this integration code remains accessible to the broader Haskell community. Developers can follow the tutorials and documentation to push their code to Heroku without worrying about licensing conflicts. The project's commitment to open licensing encourages contributions and feedback through the issue tracker and IRC channel. Whether one is starting a new Haskell web application or migrating an existing project, the permissive license removes barriers to adoption and fosters collaboration around Haskell deployment on Heroku.