forked from mirrors/nixpkgs
nixos: systemd: split off helper functions into systemd-lib
This commit is contained in:
Bob van der Linden
parent
f8b7377bb9
commit
9bc093b30a
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@ -5,6 +5,7 @@ with lib;
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let
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cfg = config.systemd;
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lndir = "${pkgs.buildPackages.xorg.lndir}/bin/lndir";
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systemd = cfg.package;
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in rec {
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shellEscape = s: (replaceChars [ "\\" ] [ "\\\\" ] s);
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@ -235,4 +236,205 @@ in rec {
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''}
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''; # */
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makeJobScript = name: text:
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let
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scriptName = replaceChars [ "\\" "@" ] [ "-" "_" ] (shellEscape name);
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out = (pkgs.writeShellScriptBin scriptName ''
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set -e
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${text}
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'').overrideAttrs (_: {
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# The derivation name is different from the script file name
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# to keep the script file name short to avoid cluttering logs.
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name = "unit-script-${scriptName}";
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});
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in "${out}/bin/${scriptName}";
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unitConfig = { config, options, ... }: {
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config = {
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unitConfig =
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optionalAttrs (config.requires != [])
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{ Requires = toString config.requires; }
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// optionalAttrs (config.wants != [])
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{ Wants = toString config.wants; }
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// optionalAttrs (config.after != [])
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{ After = toString config.after; }
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// optionalAttrs (config.before != [])
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{ Before = toString config.before; }
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// optionalAttrs (config.bindsTo != [])
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{ BindsTo = toString config.bindsTo; }
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// optionalAttrs (config.partOf != [])
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{ PartOf = toString config.partOf; }
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// optionalAttrs (config.conflicts != [])
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{ Conflicts = toString config.conflicts; }
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// optionalAttrs (config.requisite != [])
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{ Requisite = toString config.requisite; }
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// optionalAttrs (config.restartTriggers != [])
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{ X-Restart-Triggers = toString config.restartTriggers; }
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// optionalAttrs (config.reloadTriggers != [])
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{ X-Reload-Triggers = toString config.reloadTriggers; }
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// optionalAttrs (config.description != "") {
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Description = config.description; }
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// optionalAttrs (config.documentation != []) {
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Documentation = toString config.documentation; }
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// optionalAttrs (config.onFailure != []) {
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OnFailure = toString config.onFailure; }
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// optionalAttrs (options.startLimitIntervalSec.isDefined) {
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StartLimitIntervalSec = toString config.startLimitIntervalSec;
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} // optionalAttrs (options.startLimitBurst.isDefined) {
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StartLimitBurst = toString config.startLimitBurst;
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};
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};
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};
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serviceConfig = { name, config, ... }: {
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config = mkMerge
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[ { # Default path for systemd services. Should be quite minimal.
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path = mkAfter
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[ pkgs.coreutils
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pkgs.findutils
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pkgs.gnugrep
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pkgs.gnused
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systemd
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];
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environment.PATH = "${makeBinPath config.path}:${makeSearchPathOutput "bin" "sbin" config.path}";
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}
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(mkIf (config.preStart != "")
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{ serviceConfig.ExecStartPre =
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[ (makeJobScript "${name}-pre-start" config.preStart) ];
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})
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(mkIf (config.script != "")
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{ serviceConfig.ExecStart =
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makeJobScript "${name}-start" config.script + " " + config.scriptArgs;
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})
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(mkIf (config.postStart != "")
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{ serviceConfig.ExecStartPost =
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[ (makeJobScript "${name}-post-start" config.postStart) ];
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})
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(mkIf (config.reload != "")
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{ serviceConfig.ExecReload =
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makeJobScript "${name}-reload" config.reload;
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})
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(mkIf (config.preStop != "")
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{ serviceConfig.ExecStop =
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makeJobScript "${name}-pre-stop" config.preStop;
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})
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(mkIf (config.postStop != "")
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{ serviceConfig.ExecStopPost =
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makeJobScript "${name}-post-stop" config.postStop;
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})
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];
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};
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mountConfig = { config, ... }: {
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config = {
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mountConfig =
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{ What = config.what;
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Where = config.where;
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} // optionalAttrs (config.type != "") {
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Type = config.type;
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} // optionalAttrs (config.options != "") {
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Options = config.options;
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};
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};
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};
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automountConfig = { config, ... }: {
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config = {
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automountConfig =
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{ Where = config.where;
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};
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};
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};
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commonUnitText = def: ''
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[Unit]
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${attrsToSection def.unitConfig}
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'';
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targetToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text =
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''
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[Unit]
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${attrsToSection def.unitConfig}
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'';
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};
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serviceToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Service]
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${let env = cfg.globalEnvironment // def.environment;
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in concatMapStrings (n:
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let s = optionalString (env.${n} != null)
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"Environment=${builtins.toJSON "${n}=${env.${n}}"}\n";
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# systemd max line length is now 1MiB
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# https://github.com/systemd/systemd/commit/e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af
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in if stringLength s >= 1048576 then throw "The value of the environment variable ‘${n}’ in systemd service ‘${name}.service’ is too long." else s) (attrNames env)}
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${if def.reloadIfChanged then ''
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X-ReloadIfChanged=true
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'' else if !def.restartIfChanged then ''
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X-RestartIfChanged=false
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'' else ""}
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${optionalString (!def.stopIfChanged) "X-StopIfChanged=false"}
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${attrsToSection def.serviceConfig}
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'';
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};
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socketToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Socket]
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${attrsToSection def.socketConfig}
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${concatStringsSep "\n" (map (s: "ListenStream=${s}") def.listenStreams)}
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${concatStringsSep "\n" (map (s: "ListenDatagram=${s}") def.listenDatagrams)}
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'';
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};
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timerToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Timer]
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${attrsToSection def.timerConfig}
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'';
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};
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pathToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Path]
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${attrsToSection def.pathConfig}
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'';
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};
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mountToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Mount]
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${attrsToSection def.mountConfig}
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'';
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};
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automountToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Automount]
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${attrsToSection def.automountConfig}
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'';
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};
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sliceToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Slice]
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${attrsToSection def.sliceConfig}
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'';
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};
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}
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@ -11,6 +11,22 @@ let
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systemd = cfg.package;
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inherit (systemdUtils.lib)
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makeJobScript
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unitConfig
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serviceConfig
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mountConfig
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automountConfig
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commonUnitText
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targetToUnit
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serviceToUnit
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socketToUnit
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timerToUnit
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pathToUnit
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mountToUnit
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automountToUnit
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sliceToUnit;
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upstreamSystemUnits =
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[ # Targets.
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"basic.target"
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@ -209,207 +225,6 @@ let
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"xdg-desktop-autostart.target"
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];
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makeJobScript = name: text:
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let
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scriptName = replaceChars [ "\\" "@" ] [ "-" "_" ] (shellEscape name);
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out = (pkgs.writeShellScriptBin scriptName ''
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set -e
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${text}
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'').overrideAttrs (_: {
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# The derivation name is different from the script file name
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# to keep the script file name short to avoid cluttering logs.
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name = "unit-script-${scriptName}";
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});
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in "${out}/bin/${scriptName}";
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unitConfig = { config, options, ... }: {
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config = {
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unitConfig =
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optionalAttrs (config.requires != [])
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{ Requires = toString config.requires; }
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// optionalAttrs (config.wants != [])
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{ Wants = toString config.wants; }
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// optionalAttrs (config.after != [])
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{ After = toString config.after; }
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// optionalAttrs (config.before != [])
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{ Before = toString config.before; }
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// optionalAttrs (config.bindsTo != [])
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{ BindsTo = toString config.bindsTo; }
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// optionalAttrs (config.partOf != [])
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{ PartOf = toString config.partOf; }
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// optionalAttrs (config.conflicts != [])
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{ Conflicts = toString config.conflicts; }
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// optionalAttrs (config.requisite != [])
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{ Requisite = toString config.requisite; }
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// optionalAttrs (config.restartTriggers != [])
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{ X-Restart-Triggers = toString config.restartTriggers; }
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// optionalAttrs (config.reloadTriggers != [])
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{ X-Reload-Triggers = toString config.reloadTriggers; }
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// optionalAttrs (config.description != "") {
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Description = config.description; }
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// optionalAttrs (config.documentation != []) {
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Documentation = toString config.documentation; }
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// optionalAttrs (config.onFailure != []) {
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OnFailure = toString config.onFailure; }
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// optionalAttrs (options.startLimitIntervalSec.isDefined) {
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StartLimitIntervalSec = toString config.startLimitIntervalSec;
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} // optionalAttrs (options.startLimitBurst.isDefined) {
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StartLimitBurst = toString config.startLimitBurst;
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};
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};
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};
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serviceConfig = { name, config, ... }: {
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config = mkMerge
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[ { # Default path for systemd services. Should be quite minimal.
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path = mkAfter
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[ pkgs.coreutils
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pkgs.findutils
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pkgs.gnugrep
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pkgs.gnused
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systemd
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];
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environment.PATH = "${makeBinPath config.path}:${makeSearchPathOutput "bin" "sbin" config.path}";
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}
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(mkIf (config.preStart != "")
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{ serviceConfig.ExecStartPre =
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[ (makeJobScript "${name}-pre-start" config.preStart) ];
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})
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(mkIf (config.script != "")
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{ serviceConfig.ExecStart =
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makeJobScript "${name}-start" config.script + " " + config.scriptArgs;
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})
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(mkIf (config.postStart != "")
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{ serviceConfig.ExecStartPost =
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[ (makeJobScript "${name}-post-start" config.postStart) ];
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})
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(mkIf (config.reload != "")
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{ serviceConfig.ExecReload =
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makeJobScript "${name}-reload" config.reload;
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})
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(mkIf (config.preStop != "")
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{ serviceConfig.ExecStop =
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makeJobScript "${name}-pre-stop" config.preStop;
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})
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(mkIf (config.postStop != "")
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{ serviceConfig.ExecStopPost =
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makeJobScript "${name}-post-stop" config.postStop;
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})
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];
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};
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mountConfig = { config, ... }: {
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config = {
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mountConfig =
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{ What = config.what;
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Where = config.where;
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} // optionalAttrs (config.type != "") {
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Type = config.type;
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} // optionalAttrs (config.options != "") {
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Options = config.options;
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};
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};
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};
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automountConfig = { config, ... }: {
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config = {
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automountConfig =
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{ Where = config.where;
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};
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};
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};
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commonUnitText = def: ''
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[Unit]
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${attrsToSection def.unitConfig}
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'';
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targetToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text =
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''
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[Unit]
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${attrsToSection def.unitConfig}
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'';
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};
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serviceToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Service]
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${let env = cfg.globalEnvironment // def.environment;
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in concatMapStrings (n:
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let s = optionalString (env.${n} != null)
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"Environment=${builtins.toJSON "${n}=${env.${n}}"}\n";
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# systemd max line length is now 1MiB
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# https://github.com/systemd/systemd/commit/e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af
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in if stringLength s >= 1048576 then throw "The value of the environment variable ‘${n}’ in systemd service ‘${name}.service’ is too long." else s) (attrNames env)}
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${if def.reloadIfChanged then ''
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X-ReloadIfChanged=true
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'' else if !def.restartIfChanged then ''
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X-RestartIfChanged=false
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'' else ""}
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${optionalString (!def.stopIfChanged) "X-StopIfChanged=false"}
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${attrsToSection def.serviceConfig}
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'';
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};
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socketToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Socket]
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${attrsToSection def.socketConfig}
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${concatStringsSep "\n" (map (s: "ListenStream=${s}") def.listenStreams)}
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${concatStringsSep "\n" (map (s: "ListenDatagram=${s}") def.listenDatagrams)}
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'';
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};
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timerToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Timer]
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${attrsToSection def.timerConfig}
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'';
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};
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pathToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Path]
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${attrsToSection def.pathConfig}
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'';
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};
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mountToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Mount]
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${attrsToSection def.mountConfig}
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'';
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};
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automountToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Automount]
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${attrsToSection def.automountConfig}
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'';
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};
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sliceToUnit = name: def:
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{ inherit (def) aliases wantedBy requiredBy enable;
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text = commonUnitText def +
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''
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[Slice]
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${attrsToSection def.sliceConfig}
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'';
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};
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logindHandlerType = types.enum [
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"ignore" "poweroff" "reboot" "halt" "kexec" "suspend"
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