Deployment and lifecycle management for Nix
lib: add comments
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nix/lib.nix
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nix/lib.nix
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}:
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{
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# generateUnitFiles creates a derivatioon with systemd units
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# using the nixos module structure, but intended for using in
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# a sower service along with sowerServicesHook
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flake.lib.generateUnitFiles =
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{
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pkgs,
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# TODO type this
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};
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# copy the options structure out of nixpkgs, or a subset anyway
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# unfortunately this isn't exposed in a consumable way in nixpkgs
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systemd = {
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package = mkPackageOption pkgs "systemd" { };
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···
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};
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config = {
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# the bare minimum to init the necessary config, and merge all the units together
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# for consumption by generateUnits
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systemd = {
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package = pkgs.systemd;
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defaultUnit = "default.target";
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in
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{
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config = {
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# build the combined units into a package, and expose
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# then in a module option for consumption
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service-units = pkgs.runCommand "service-units" { } ''
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cp -R ${system-units} $out
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cp --recursive ${system-units} $out
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chmod +w -R $out
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# delete any broken links
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find $out -xtype l -delete
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# delete empty directories
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find $out -type d -empty -delete
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# remove the upstream targets
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for unit in ${builtins.toString upstreamUnits}; do
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rm $out/$unit
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done
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}
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)
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{
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# pass on the config from generateUnitFiles
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systemd = config;
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}
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];
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};
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in
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# return back the units, aka the package with them
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moduler.config.service-units;
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}