Jenkins

Jenkins is an extendable open source continuous integration server.

services.jenkins activation

Write this into your /etc/nixos/configuration.nix

 services.jenkins = {
   enable = true;
 };

After a `nixos-rebuild switch`

Then the program is available via webbrowser at:

<http://localhost:8080>

CI configuration

Using the multibranch pipeline one can use this Jenkinsfile in the repository to build it:

 pipeline {
   agent any
   environment {
       PATH="/run/current-system/sw/bin"
   }
   stages {
       stage('Build') {
           steps {
               echo 'Building..'
               sh 'ls'
               sh 'nix-shell --command "just build"'
               archiveArtifacts artifacts: 'frontend/dist/*', fingerprint: true
           }
       }
       stage('Test') {
           steps {
               echo 'Testing..'
               sh 'nix-shell --command "just test"'
           }
       }
       stage('Check fmt') {
           steps {
               echo 'Checking fmt..'
                 sh 'nix-shell --command "cargo fmt --check"'
                 sh 'nix-shell --command "cd frontend; cargo fmt --check"'
           }
       }
   }
   post {
        changed {
           script {
               if (currentBuild.currentResult == 'FAILURE') {
                   emailext subject: '$DEFAULT_SUBJECT',
                       body: '$DEFAULT_CONTENT',
                       recipientProviders: [
                           [$class: 'CulpritsRecipientProvider'],
                           [$class: 'DevelopersRecipientProvider'],
                           [$class: 'RequesterRecipientProvider']
                       ],
                       replyTo: '$DEFAULT_REPLYTO',
                       to: '$DEFAULT_RECIPIENTS'
               }
           }
       }
       always {
           cleanWs(cleanWhenNotBuilt: false,
                   deleteDirs: true,
                   disableDeferredWipeout: true,
                   notFailBuild: true,
                   patterns: [[pattern: '.gitignore', type: 'INCLUDE'],
                              [pattern: '.propsfile', type: 'EXCLUDE']])
       }
   }
 }

reverse proxy

 services.nginx = {
   enable = true;
   recommendedGzipSettings = true;
   recommendedOptimisation = true;
   virtualHosts = {
     jenkins = {
       serverName = "ci.example.com";
       serverAliases = [ "ci-static.example.com" ];
       forceSSL = true;
       enableACME = true;
       locations = {
         "/" = {
           proxyPass = "http://127.0.0.1:8080/";
         };
       };
     };
   };

You might want to enable the firewall using:

 networking.firewall.enable = true;

using email

Use <https://gitlab.com/simple-nixos-mailserver> for email support. Can be tested using a test button from the <localhost:8080> webpage.

building nix projects

jenkins-nix-ci: A NixOS module for Jenkins, optimized specifically for running projects using Nix.

mrVanDalo has a library to declare jenkins in his repository. It can be used as shown here.

• Note: the above repo no longer has those sources so it is outdated, but keeping it as a reference.