Hydra: Difference between revisions
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{{note| Hydra is intended to be used by Nix/NixOS package developers; it is not needed to simply use NixOS.}} | |||
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Hydra is a tool for continuous integration testing and software release that uses a purely functional language to describe build jobs and their dependencies. Continuous integration is a simple technique to improve the quality of the software development process. An automated system continuously or periodically checks out the source code of a project, builds it, runs tests, and produces reports for the developers. Thus, various errors that might accidentally be committed into the code base are automatically caught. | Hydra is a tool for continuous integration testing and software release that uses a purely functional language to describe build jobs and their dependencies. Continuous integration is a simple technique to improve the quality of the software development process. An automated system continuously or periodically checks out the source code of a project, builds it, runs tests, and produces reports for the developers. Thus, various errors that might accidentally be committed into the code base are automatically caught. | ||
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The official Hydra servers provide pre-built binary packages to speed up the update time for | The official Hydra servers provide pre-built binary packages to speed up the update time for Nixpkgs: Users do not have to compile them on their own computers. | ||
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< | <syntaxhighlight lang="nix"> | ||
services.hydra = { | services.hydra = { | ||
enable = true; | enable = true; | ||
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# a standalone Hydra will require you to unset the buildMachinesFiles list to avoid using a nonexistant /etc/nix/machines | # a standalone Hydra will require you to unset the buildMachinesFiles list to avoid using a nonexistant /etc/nix/machines | ||
buildMachinesFiles = []; | buildMachinesFiles = []; | ||
# you will probably also want, otherwise *everything* will be built from scratch | # you will probably also want this, otherwise *everything* will be built from scratch | ||
useSubstitutes = true; | useSubstitutes = true; | ||
}; | }; | ||
</ | </syntaxhighlight> | ||
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The module will automatically enable postgresql if you do not change the <code>services.hydra.dbi</code> option. Database layout will be created automatically by the Hydra service, however keep in mind that some state will be stored in the database and a complete stateless configuration is currently not possible - do your backups. | The module will automatically enable [[PostgreSQL|postgresql]] if you do not change the <code>services.hydra.dbi</code> option. Database layout will be created automatically by the Hydra service, however keep in mind that some state will be stored in the database and a complete stateless configuration is currently not possible - do your backups. | ||
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nix.buildMachines = [ | nix.buildMachines = [ | ||
{ hostName = "localhost"; | { hostName = "localhost"; | ||
protocol = null; | |||
system = "x86_64-linux"; | system = "x86_64-linux"; | ||
supportedFeatures = ["kvm" "nixos-test" "big-parallel" "benchmark"]; | supportedFeatures = ["kvm" "nixos-test" "big-parallel" "benchmark"]; | ||
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* Type: Flake | * Type: [[Flakes|Flake]] | ||
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