249 lines
9.1 KiB
Nix
249 lines
9.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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jenkinsCfg = config.services.jenkins;
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cfg = config.services.jenkins.jobBuilder;
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in {
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options = {
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services.jenkins.jobBuilder = {
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enable = mkEnableOption (mdDoc ''
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the Jenkins Job Builder (JJB) service. It
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allows defining jobs for Jenkins in a declarative manner.
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Jobs managed through the Jenkins WebUI (or by other means) are left
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unchanged.
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Note that it really is declarative configuration; if you remove a
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previously defined job, the corresponding job directory will be
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deleted.
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Please see the Jenkins Job Builder documentation for more info:
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<https://jenkins-job-builder.readthedocs.io/>
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'');
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accessUser = mkOption {
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default = "admin";
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type = types.str;
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description = lib.mdDoc ''
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User id in Jenkins used to reload config.
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'';
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};
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accessToken = mkOption {
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default = "";
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type = types.str;
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description = lib.mdDoc ''
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User token in Jenkins used to reload config.
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WARNING: This token will be world readable in the Nix store. To keep
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it secret, use the {option}`accessTokenFile` option instead.
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'';
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};
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accessTokenFile = mkOption {
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default = "${config.services.jenkins.home}/secrets/initialAdminPassword";
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defaultText = literalExpression ''"''${config.services.jenkins.home}/secrets/initialAdminPassword"'';
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type = types.str;
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example = "/run/keys/jenkins-job-builder-access-token";
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description = lib.mdDoc ''
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File containing the API token for the {option}`accessUser`
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user.
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'';
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};
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yamlJobs = mkOption {
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default = "";
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type = types.lines;
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example = ''
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- job:
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name: jenkins-job-test-1
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builders:
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- shell: echo 'Hello world!'
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'';
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description = lib.mdDoc ''
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Job descriptions for Jenkins Job Builder in YAML format.
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'';
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};
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jsonJobs = mkOption {
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default = [ ];
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type = types.listOf types.str;
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example = literalExpression ''
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[
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'''
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[ { "job":
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{ "name": "jenkins-job-test-2",
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"builders": [ "shell": "echo 'Hello world!'" ]
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}
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}
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]
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'''
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]
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'';
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description = lib.mdDoc ''
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Job descriptions for Jenkins Job Builder in JSON format.
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'';
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};
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nixJobs = mkOption {
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default = [ ];
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type = types.listOf types.attrs;
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example = literalExpression ''
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[ { job =
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{ name = "jenkins-job-test-3";
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builders = [
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{ shell = "echo 'Hello world!'"; }
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];
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};
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}
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]
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'';
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description = lib.mdDoc ''
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Job descriptions for Jenkins Job Builder in Nix format.
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This is a trivial wrapper around jsonJobs, using builtins.toJSON
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behind the scene.
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'';
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};
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};
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};
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config = mkIf (jenkinsCfg.enable && cfg.enable) {
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assertions = [
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{ assertion =
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if cfg.accessUser != ""
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then (cfg.accessToken != "" && cfg.accessTokenFile == "") ||
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(cfg.accessToken == "" && cfg.accessTokenFile != "")
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else true;
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message = ''
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One of accessToken and accessTokenFile options must be non-empty
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strings, but not both. Current values:
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services.jenkins.jobBuilder.accessToken = "${cfg.accessToken}"
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services.jenkins.jobBuilder.accessTokenFile = "${cfg.accessTokenFile}"
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'';
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}
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];
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systemd.services.jenkins-job-builder = {
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description = "Jenkins Job Builder Service";
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# JJB can run either before or after jenkins. We chose after, so we can
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# always use curl to notify (running) jenkins to reload its config.
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after = [ "jenkins.service" ];
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wantedBy = [ "multi-user.target" ];
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path = with pkgs; [ jenkins-job-builder curl ];
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# Q: Why manipulate files directly instead of using "jenkins-jobs upload [...]"?
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# A: Because this module is for administering a local jenkins install,
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# and using local file copy allows us to not worry about
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# authentication.
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script =
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let
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yamlJobsFile = builtins.toFile "jobs.yaml" cfg.yamlJobs;
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jsonJobsFiles =
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map (x: (builtins.toFile "jobs.json" x))
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(cfg.jsonJobs ++ [(builtins.toJSON cfg.nixJobs)]);
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jobBuilderOutputDir = "/run/jenkins-job-builder/output";
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# Stamp file is placed in $JENKINS_HOME/jobs/$JOB_NAME/ to indicate
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# ownership. Enables tracking and removal of stale jobs.
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ownerStamp = ".config-xml-managed-by-nixos-jenkins-job-builder";
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reloadScript = ''
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echo "Asking Jenkins to reload config"
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curl_opts="--silent --fail --show-error"
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access_token_file=${if cfg.accessTokenFile != ""
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then cfg.accessTokenFile
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else "$RUNTIME_DIRECTORY/jenkins_access_token.txt"}
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if [ "${cfg.accessToken}" != "" ]; then
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(umask 0077; printf "${cfg.accessToken}" >"$access_token_file")
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fi
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jenkins_url="http://${jenkinsCfg.listenAddress}:${toString jenkinsCfg.port}${jenkinsCfg.prefix}"
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auth_file="$RUNTIME_DIRECTORY/jenkins_auth_file.txt"
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trap 'rm -f "$auth_file"' EXIT
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(umask 0077; printf "${cfg.accessUser}:@password_placeholder@" >"$auth_file")
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"${pkgs.replace-secret}/bin/replace-secret" "@password_placeholder@" "$access_token_file" "$auth_file"
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if ! "${pkgs.jenkins}/bin/jenkins-cli" -s "$jenkins_url" -auth "@$auth_file" reload-configuration; then
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echo "error: failed to reload configuration"
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exit 1
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fi
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'';
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in
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''
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joinByString()
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{
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local separator="$1"
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shift
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local first="$1"
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shift
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printf "%s" "$first" "''${@/#/$separator}"
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}
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# Map a relative directory path in the output from
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# jenkins-job-builder (jobname) to the layout expected by jenkins:
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# each directory level gets prepended "jobs/".
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getJenkinsJobDir()
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{
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IFS='/' read -ra input_dirs <<< "$1"
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printf "jobs/"
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joinByString "/jobs/" "''${input_dirs[@]}"
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}
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# The inverse of getJenkinsJobDir (remove the "jobs/" prefixes)
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getJobname()
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{
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IFS='/' read -ra input_dirs <<< "$1"
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local i=0
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local nelem=''${#input_dirs[@]}
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for e in "''${input_dirs[@]}"; do
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if [ $((i % 2)) -eq 1 ]; then
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printf "$e"
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if [ $i -lt $(( nelem - 1 )) ]; then
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printf "/"
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fi
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fi
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i=$((i + 1))
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done
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}
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rm -rf ${jobBuilderOutputDir}
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cur_decl_jobs=/run/jenkins-job-builder/declarative-jobs
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rm -f "$cur_decl_jobs"
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# Create / update jobs
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mkdir -p ${jobBuilderOutputDir}
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for inputFile in ${yamlJobsFile} ${concatStringsSep " " jsonJobsFiles}; do
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HOME="${jenkinsCfg.home}" "${pkgs.jenkins-job-builder}/bin/jenkins-jobs" --ignore-cache test --config-xml -o "${jobBuilderOutputDir}" "$inputFile"
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done
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find "${jobBuilderOutputDir}" -type f -name config.xml | while read -r f; do echo "$(dirname "$f")"; done | sort | while read -r dir; do
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jobname="$(realpath --relative-to="${jobBuilderOutputDir}" "$dir")"
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jenkinsjobname=$(getJenkinsJobDir "$jobname")
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jenkinsjobdir="${jenkinsCfg.home}/$jenkinsjobname"
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echo "Creating / updating job \"$jobname\""
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mkdir -p "$jenkinsjobdir"
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touch "$jenkinsjobdir/${ownerStamp}"
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cp "$dir"/config.xml "$jenkinsjobdir/config.xml"
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echo "$jenkinsjobname" >> "$cur_decl_jobs"
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done
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# Remove stale jobs
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find "${jenkinsCfg.home}" -type f -name "${ownerStamp}" | while read -r f; do echo "$(dirname "$f")"; done | sort --reverse | while read -r dir; do
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jenkinsjobname="$(realpath --relative-to="${jenkinsCfg.home}" "$dir")"
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grep --quiet --line-regexp "$jenkinsjobname" "$cur_decl_jobs" 2>/dev/null && continue
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jobname=$(getJobname "$jenkinsjobname")
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echo "Deleting stale job \"$jobname\""
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jobdir="${jenkinsCfg.home}/$jenkinsjobname"
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rm -rf "$jobdir"
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done
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'' + (optionalString (cfg.accessUser != "") reloadScript);
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serviceConfig = {
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Type = "oneshot";
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User = jenkinsCfg.user;
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RuntimeDirectory = "jenkins-job-builder";
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};
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};
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};
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}
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