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# Buildbot-nix
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2023-12-24 07:12:42 +00:00
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Buildbot-nix is a NixOS module designed to integrate
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[Buildbot](https://www.buildbot.net/), a continuous integration (CI) framework,
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into the Nix ecosystem. This module is under active development, and while it's
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generally stable and widely used, please be aware that some APIs may change over
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time.
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2023-12-24 07:12:42 +00:00
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## Getting Started with Buildbot Setup
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To set up Buildbot using Buildbot-nix, you can start by exploring the provided
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examples:
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- Check out the basic setup in [example](./examples/default.nix).
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- Learn about configuring the Buildbot master in
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[master module](./nix/master.nix).
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- Understand how to set up a Buildbot worker in
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[worker module](./nix/worker.nix).
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Additionally, you can find real-world examples at the end of this document.
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Buildbot masters and workers can be deployed either on the same machine or on
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separate machines. To support multiple architectures, configure them as
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[nix remote builders](https://nixos.org/manual/nix/stable/advanced-topics/distributed-builds).
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For a practical NixOS example, see
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[this remote builder configuration](https://github.com/Mic92/dotfiles/blob/main/nixos/eve/modules/remote-builder.nix).
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## Using Buildbot in Your Project
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Buildbot-nix automatically triggers builds for your project under these
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conditions:
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- When a pull request is opened.
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- When a commit is pushed to the default git branch.
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It does this by evaluating the `.#checks` attribute of your project's flake in
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parallel. Each attribute found results in a separate build step. You can test
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these builds locally using `nix flake check -L` or
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[nix-fast-build](https://github.com/Mic92/nix-fast-build).
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If you need to build other parts of your flake, such as packages or NixOS
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machines, you should re-export these into the `.#checks` output. Here are two
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examples to guide you:
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- Using
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[flake-parts](https://github.com/Mic92/dotfiles/blob/10890601a02f843b49fe686d7bc19cb66a04e3d7/flake.nix#L139).
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- A
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[plain flake example](https://github.com/nix-community/nixos-images/blob/56b52791312edeade1e6bd853ce56c778f363d50/flake.nix#L53).
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### Integration with GitHub
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Buildbot-nix primarily supports GitHub, with plans to extend support to other
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platforms like Gitea.
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To integrate with GitHub:
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1. **GitHub App**: Set up a GitHub app for Buildbot to enable GitHub user
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authentication on the Buildbot dashboard.
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2. **OAuth Credentials**: After installing the app, generate OAuth credentials
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and configure them in the buildbot-nix NixOS module.
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3. **GitHub Token**: Obtain a GitHub token with `admin:repo_hook` and `repo`
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permissions. For GitHub organizations, it's advisable to create a separate
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GitHub user for managing repository webhooks.
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### Real-World Deployments
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See Buildbot-nix in action in these deployments:
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- **Nix-community infra**:
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[Configuration](https://github.com/nix-community/infra/tree/master/modules/nixos)
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| [Instance](https://buildbot.nix-community.org/)
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- **Mic92's dotfiles**:
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[Configuration](https://github.com/Mic92/dotfiles/blob/main/nixos/eve/modules/buildbot.nix)
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| [Instance](https://buildbot.thalheim.io/)
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- **Technical University Munich**:
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[Configuration](https://github.com/TUM-DSE/doctor-cluster-config/tree/master/modules/buildbot)
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| [Instance](https://buildbot.dse.in.tum.de/)
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- **Numtide**: [Instance](https://buildbot.numtide.com)
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