58 lines
1.9 KiB
Nix
58 lines
1.9 KiB
Nix
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{ config, pkgs, lib, ... }:
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let
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cfg = config.programs.nix-index;
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in
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{
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options.programs.nix-index.enableDatabaseFetcher = lib.mkEnableOption "timed unit that fetches an updated database of nixpkgs outputs";
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config = {
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systemd.user.timers.fetch-nix-index-database = lib.mkIf cfg.enableDatabaseFetcher {
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Unit = {
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Description = "Fetch nix-index database";
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Documentation = [ "https://github.com/nix-community/nix-index-database" ];
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};
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Timer = {
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Unit = "fetch-nix-index-database.service";
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OnCalendar = "weekly";
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Persistent = true;
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};
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Install = {
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WantedBy = [ "timers.target" ];
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};
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};
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systemd.user.services.fetch-nix-index-database = lib.mkIf cfg.enableDatabaseFetcher {
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Unit = {
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Description = "Fetch nix-index database";
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Documentation = [ "https://github.com/nix-community/nix-index-database" ];
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};
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Service = {
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Type = "oneshot";
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ExecStart = lib.getExe (pkgs.writeShellApplication {
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name = "fetch-nix-index-database";
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runtimeInputs = with pkgs; [
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gnused
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wget
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];
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# Source: https://github.com/nix-community/nix-index-database?tab=readme-ov-file#ad-hoc-download
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# Slightly modified to satisfy shellcheck
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text = ''
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download_nixpkgs_cache_index () {
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filename="index-$(uname -m | sed 's/^arm64$/aarch64/')-$(uname | tr '[:upper:]' '[:lower:]')"
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mkdir -p "${config.home.homeDirectory}/.cache/nix-index" && cd "${config.home.homeDirectory}/.cache/nix-index"
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# -N will only download a new version if there is an update.
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wget -q -N "https://github.com/nix-community/nix-index-database/releases/latest/download/$filename"
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ln -f "$filename" files
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}
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download_nixpkgs_cache_index
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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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