{
  description = "Your self-hosted, globally interconnected microblogging community";
  inputs.myuids = {
    url = "path:../myuids";
  };
  inputs.flake-utils.url = "github:numtide/flake-utils";
  inputs.nixpkgs = {
    url = "github:NixOS/nixpkgs/840c782d507d60aaa49aa9e3f6d0b0e780912742";
    flake = false;
  };
  inputs.mastodon = {
    url = "github:tootsuite/mastodon/v2.9.4";
    flake = false;
  };

  outputs = { self, myuids, nixpkgs, mastodon, flake-utils }: flake-utils.lib.eachSystem ["x86_64-linux"] (system:
    let
      pkgs = import nixpkgs { inherit system; overlays = []; };
      version = (builtins.fromJSON (builtins.readFile ./flake.lock)).nodes.mastodon.original.ref;
      inherit (pkgs) callPackage;
    in rec {
      packages.mastodon = callPackage ./. { src = mastodon // { inherit version; }; };
      defaultPackage = packages.mastodon;
      legacyPackages.mastodon = packages.mastodon;
      checks = {
        build = defaultPackage;
      };
    }
  ) // rec {
    overlays = {
      mastodon = final: prev: {
        mastodon = self.defaultPackage."${final.system}";
      };
    };
    overlay = overlays.mastodon;
    nixosModule = { lib, pkgs, config, ... }:
      let
        name = "mastodon";
        cfg = config.immaeServices.mastodon;
      in
        {
          options.immaeServices.mastodon = {
            enable = lib.mkEnableOption "Enable Mastodon’s service";
            user = lib.mkOption {
              type = lib.types.str;
              default = name;
              description = "User account under which Mastodon runs";
            };
            group = lib.mkOption {
              type = lib.types.str;
              default = name;
              description = "Group under which Mastodon runs";
            };
            dataDir = lib.mkOption {
              type = lib.types.path;
              default = "/var/lib/${name}";
              description = ''
                The directory where Mastodon stores its data.
              '';
            };
            socketsPrefix = lib.mkOption {
              type = lib.types.str;
              default = "live";
              description = ''
                The prefix to use for Mastodon sockets.
                '';
            };
            socketsDir = lib.mkOption {
              type = lib.types.path;
              default = "/run/${name}";
              description = ''
                The directory where Mastodon puts runtime files and sockets.
                '';
            };
            configFile = lib.mkOption {
              type = lib.types.path;
              description = ''
                The configuration file path for Mastodon.
                '';
            };
            package = lib.mkOption {
              type = lib.types.package;
              default = pkgs.mastodon;
              description = ''
                Mastodon package to use.
                '';
            };
            # Output variables
            workdir = lib.mkOption {
              type = lib.types.package;
              default = cfg.package.override { varDir = cfg.dataDir; };
              description = ''
              Adjusted mastodon package with overriden varDir
              '';
              readOnly = true;
            };
            systemdStateDirectory = lib.mkOption {
              type = lib.types.str;
              # Use ReadWritePaths= instead if varDir is outside of /var/lib
              default = assert lib.strings.hasPrefix "/var/lib/" cfg.dataDir;
                lib.strings.removePrefix "/var/lib/" cfg.dataDir;
              description = ''
              Adjusted Mastodon data directory for systemd
              '';
              readOnly = true;
            };
            systemdRuntimeDirectory = lib.mkOption {
              type = lib.types.str;
              # Use ReadWritePaths= instead if socketsDir is outside of /run
              default = assert lib.strings.hasPrefix "/run/" cfg.socketsDir;
                lib.strings.removePrefix "/run/" cfg.socketsDir;
              description = ''
              Adjusted Mastodon sockets directory for systemd
              '';
              readOnly = true;
            };
            sockets = lib.mkOption {
              type = lib.types.attrsOf lib.types.path;
              default = {
                node  = "${cfg.socketsDir}/${cfg.socketsPrefix}_node.sock";
                rails = "${cfg.socketsDir}/${cfg.socketsPrefix}_puma.sock";
              };
              readOnly = true;
              description = ''
                Mastodon sockets
                '';
            };
          };

          config = lib.mkIf cfg.enable {
            nixpkgs.overlays = [ self.overlay ];
            users.users = lib.optionalAttrs (cfg.user == name) {
              "${name}" = {
                uid = myuids.lib.uids.mastodon;
                group = cfg.group;
                description = "Mastodon user";
                home = cfg.dataDir;
                useDefaultShell = true;
              };
            };
            users.groups = lib.optionalAttrs (cfg.group == name) {
              "${name}" = {
                gid = myuids.lib.gids.mastodon;
              };
            };

            systemd.slices.mastodon = {
              description = "Mastodon slice";
            };

            systemd.services.mastodon-streaming = {
              description = "Mastodon Streaming";
              wantedBy = [ "multi-user.target" ];
              after = [ "network.target" "mastodon-web.service" ];

              environment.NODE_ENV = "production";
              environment.SOCKET = cfg.sockets.node;

              path = [ cfg.workdir.nodejs pkgs.bashInteractive ];

              script = ''
                exec npm run start
              '';

              postStart = ''
                while [ ! -S $SOCKET ]; do
                  sleep 0.5
                done
                chmod a+w $SOCKET
              '';

              postStop = ''
                rm $SOCKET
              '';

              serviceConfig = {
                Slice = "mastodon.slice";
                User = cfg.user;
                EnvironmentFile = cfg.configFile;
                PrivateTmp = true;
                Restart = "always";
                TimeoutSec = 15;
                Type = "simple";
                WorkingDirectory = cfg.workdir;
                StateDirectory = cfg.systemdStateDirectory;
                RuntimeDirectory = cfg.systemdRuntimeDirectory;
                RuntimeDirectoryPreserve = "yes";
              };

              unitConfig.RequiresMountsFor = cfg.dataDir;
            };

            systemd.services.mastodon-web = {
              description = "Mastodon Web app";
              wantedBy = [ "multi-user.target" ];
              after = [ "network.target" ];

              environment.RAILS_ENV = "production";
              environment.BUNDLE_PATH = "${cfg.workdir.gems}/${cfg.workdir.gems.ruby.gemPath}";
              environment.BUNDLE_GEMFILE = "${cfg.workdir.gems.confFiles}/Gemfile";
              environment.SOCKET = cfg.sockets.rails;

              path = [ cfg.workdir.gems cfg.workdir.gems.ruby pkgs.file pkgs.imagemagick ];

              preStart = ''
                install -m 0755 -d ${cfg.dataDir}/tmp/cache
                ./bin/bundle exec rails db:migrate
              '';

              script = ''
                exec ./bin/bundle exec puma -C config/puma.rb
              '';

              postStart = ''
                exec ./bin/tootctl cache clear
                '';
              serviceConfig = {
                Slice = "mastodon.slice";
                User = cfg.user;
                EnvironmentFile = cfg.configFile;
                PrivateTmp = true;
                Restart = "always";
                TimeoutSec = 60;
                Type = "simple";
                WorkingDirectory = cfg.workdir;
                StateDirectory = cfg.systemdStateDirectory;
                RuntimeDirectory = cfg.systemdRuntimeDirectory;
                RuntimeDirectoryPreserve = "yes";
              };

              unitConfig.RequiresMountsFor = cfg.dataDir;
            };

            # To be run manually because computationnally heavy
            systemd.services.mastodon-cleanup-manual = {
              description = "Cleanup mastodon";

              environment.RAILS_ENV = "production";
              environment.BUNDLE_PATH = "${cfg.workdir.gems}/${cfg.workdir.gems.ruby.gemPath}";
              environment.BUNDLE_GEMFILE = "${cfg.workdir.gems.confFiles}/Gemfile";
              environment.SOCKET = cfg.sockets.rails;

              path = [ cfg.workdir.gems cfg.workdir.gems.ruby pkgs.file ];

              script = ''
                exec ./bin/tootctl statuses remove --days 365
              '';

              serviceConfig = {
                User = cfg.user;
                EnvironmentFile = cfg.configFile;
                PrivateTmp = true;
                Type = "oneshot";
                WorkingDirectory = cfg.workdir;
                StateDirectory = cfg.systemdStateDirectory;
                RuntimeDirectory = cfg.systemdRuntimeDirectory;
                RuntimeDirectoryPreserve = "yes";
              };

              unitConfig.RequiresMountsFor = cfg.dataDir;
            };

            systemd.services.mastodon-cleanup = {
              description = "Cleanup mastodon";
              startAt = "daily";
              restartIfChanged = false;

              environment.RAILS_ENV = "production";
              environment.BUNDLE_PATH = "${cfg.workdir.gems}/${cfg.workdir.gems.ruby.gemPath}";
              environment.BUNDLE_GEMFILE = "${cfg.workdir.gems.confFiles}/Gemfile";
              environment.SOCKET = cfg.sockets.rails;

              path = [ cfg.workdir.gems cfg.workdir.gems.ruby pkgs.file ];

              script = ''
                exec ./bin/tootctl media remove --days 30
              '';

              serviceConfig = {
                User = cfg.user;
                EnvironmentFile = cfg.configFile;
                PrivateTmp = true;
                Type = "oneshot";
                WorkingDirectory = cfg.workdir;
                StateDirectory = cfg.systemdStateDirectory;
                RuntimeDirectory = cfg.systemdRuntimeDirectory;
                RuntimeDirectoryPreserve = "yes";
              };

              unitConfig.RequiresMountsFor = cfg.dataDir;
            };

            systemd.services.mastodon-sidekiq = {
              description = "Mastodon Sidekiq";
              wantedBy = [ "multi-user.target" ];
              after = [ "network.target" "mastodon-web.service" ];

              environment.RAILS_ENV="production";
              environment.BUNDLE_PATH = "${cfg.workdir.gems}/${cfg.workdir.gems.ruby.gemPath}";
              environment.BUNDLE_GEMFILE = "${cfg.workdir.gems.confFiles}/Gemfile";
              environment.DB_POOL="5";

              path = [ cfg.workdir.gems cfg.workdir.gems.ruby pkgs.imagemagick pkgs.ffmpeg pkgs.file ];

              script = ''
                exec ./bin/bundle exec sidekiq -c 5 -q default -q mailers -q pull -q push
              '';

              serviceConfig = {
                Slice = "mastodon.slice";
                User = cfg.user;
                EnvironmentFile = cfg.configFile;
                PrivateTmp = true;
                Restart = "always";
                TimeoutSec = 15;
                Type = "simple";
                WorkingDirectory = cfg.workdir;
                StateDirectory = cfg.systemdStateDirectory;
                RuntimeDirectory = cfg.systemdRuntimeDirectory;
                RuntimeDirectoryPreserve = "yes";
              };

              unitConfig.RequiresMountsFor = cfg.dataDir;
            };

          };
        };
      };
}