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87 lines
3.5 KiB
Markdown
87 lines
3.5 KiB
Markdown
# NixOS
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NixOS is a Linux distribution based on the purely functional package
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management system Nix. More information can be found at
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https://nixos.org/nixos and in the manual in doc/manual.
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## Testing changes
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You can add new module to your NixOS configuration file (usually it’s `/etc/nixos/configuration.nix`). And do `sudo nixos-rebuild test -I nixpkgs=<path to your local nixpkgs folder> --fast`.
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## Reviewing contributions
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When changing the bootloader installation process, extra care must be taken. Grub installations cannot be rolled back, hence changes may break people’s installations forever. For any non-trivial change to the bootloader please file a PR asking for review, especially from \@edolstra.
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### Module updates
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Module updates are submissions changing modules in some ways. These often contains changes to the options or introduce new options.
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Reviewing process:
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- Ensure that the module maintainers are notified.
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- [CODEOWNERS](https://help.github.com/articles/about-codeowners/) will make GitHub notify users based on the submitted changes, but it can happen that it misses some of the package maintainers.
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- Ensure that the module tests, if any, are succeeding.
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- Ensure that the introduced options are correct.
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- Type should be appropriate (string related types differs in their merging capabilities, `loaOf` and `string` types are deprecated).
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- Description, default and example should be provided.
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- Ensure that option changes are backward compatible.
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- `mkRenamedOptionModuleWith` provides a way to make option changes backward compatible.
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- Ensure that removed options are declared with `mkRemovedOptionModule`
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- Ensure that changes that are not backward compatible are mentioned in release notes.
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- Ensure that documentations affected by the change is updated.
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Sample template for a module update review is provided below.
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```markdown
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##### Reviewed points
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- [ ] changes are backward compatible
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- [ ] removed options are declared with `mkRemovedOptionModule`
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- [ ] changes that are not backward compatible are documented in release notes
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- [ ] module tests succeed on ARCHITECTURE
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- [ ] options types are appropriate
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- [ ] options description is set
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- [ ] options example is provided
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- [ ] documentation affected by the changes is updated
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##### Possible improvements
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##### Comments
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```
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### New modules
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New modules submissions introduce a new module to NixOS.
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Reviewing process:
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- Ensure that the module tests, if any, are succeeding.
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- Ensure that the introduced options are correct.
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- Type should be appropriate (string related types differs in their merging capabilities, `loaOf` and `string` types are deprecated).
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- Description, default and example should be provided.
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- Ensure that module `meta` field is present
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- Maintainers should be declared in `meta.maintainers`.
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- Module documentation should be declared with `meta.doc`.
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- Ensure that the module respect other modules functionality.
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- For example, enabling a module should not open firewall ports by default.
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Sample template for a new module review is provided below.
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```markdown
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##### Reviewed points
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- [ ] module path fits the guidelines
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- [ ] module tests succeed on ARCHITECTURE
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- [ ] options have appropriate types
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- [ ] options have default
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- [ ] options have example
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- [ ] options have descriptions
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- [ ] No unneeded package is added to environment.systemPackages
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- [ ] meta.maintainers is set
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- [ ] module documentation is declared in meta.doc
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##### Possible improvements
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##### Comments
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```
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