Initial commit

2021-11-15 13:02:05 +03:00
commit 85aaf52635
28 changed files with 1360 additions and 0 deletions
--- a/social/pleroma-module.nix
+++ b/social/pleroma-module.nix
@@ -0,0 +1,133 @@
+{ config, options, lib, pkgs, stdenv, ... }:
+let
+  cfg = config.services.pleroma;
+in
+{
+  options = {
+    services.pleroma = with lib; {
+      enable = mkEnableOption "pleroma";
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.pleroma-otp;
+        description = "Pleroma package to use.";
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "pleroma";
+        description = "User account under which pleroma runs.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "pleroma";
+        description = "Group account under which pleroma runs.";
+      };
+
+      stateDir = mkOption {
+        type = types.str;
+        default = "/var/lib/pleroma";
+        readOnly = true;
+        description = "Directory where the pleroma service will save the uploads and static files.";
+      };
+
+      configs = mkOption {
+        type = with types; listOf str;
+        description = ''
+          Pleroma public configuration.
+          This list gets appended from left to
+          right into /etc/pleroma/config.exs. Elixir evaluates its
+          configuration imperatively, meaning you can override a
+          setting by appending a new str to this NixOS option list.
+          <emphasis>DO NOT STORE ANY PLEROMA SECRET
+          HERE</emphasis>, use
+          <link linkend="opt-services.pleroma.secretConfigFile">services.pleroma.secretConfigFile</link>
+          instead.
+          This setting is going to be stored in a file part of
+          the Nix store. The Nix store being world-readable, it's not
+          the right place to store any secret
+          Have a look to Pleroma section in the NixOS manual for more
+          informations.
+        '';
+      };
+
+      secretConfigFile = mkOption {
+        type = types.str;
+        default = "/var/lib/pleroma/secrets.exs";
+        description = ''
+          Path to the file containing your secret pleroma configuration.
+          <emphasis>DO NOT POINT THIS OPTION TO THE NIX
+          STORE</emphasis>, the store being world-readable, it'll
+          compromise all your secrets.
+        '';
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    users = {
+      users."${cfg.user}" = {
+        description = "Pleroma user";
+        home = cfg.stateDir;
+        extraGroups = [ cfg.group ];
+      };
+      groups."${cfg.group}" = { };
+    };
+
+    environment.systemPackages = [ cfg.package ];
+
+    environment.etc."/pleroma/config.exs".text = ''
+      ${lib.concatMapStrings (x: "${x}") cfg.configs}
+      # The lau/tzdata library is trying to download the latest
+      # timezone database in the OTP priv directory by default.
+      # This directory being in the store, it's read-only.
+      # Setting that up to a more appropriate location.
+      config :tzdata, :data_dir, "/var/lib/pleroma/elixir_tzdata_data"
+      import_config "${cfg.secretConfigFile}"
+    '';
+
+    systemd.services.pleroma = {
+      description = "Pleroma social network";
+      after = [ "network-online.target" "postgresql.service" ];
+      wantedBy = [ "multi-user.target" ];
+      restartTriggers = [ config.environment.etc."/pleroma/config.exs".source ];
+      serviceConfig = {
+        User = cfg.user;
+        Group = cfg.group;
+        Type = "exec";
+        WorkingDirectory = "~";
+        StateDirectory = "pleroma pleroma/static pleroma/uploads";
+        StateDirectoryMode = "700";
+
+        # Checking the conf file is there then running the database
+        # migration before each service start, just in case there are
+        # some pending ones.
+        #
+        # It's sub-optimal as we'll always run this, even if pleroma
+        # has not been updated. But the no-op process is pretty fast.
+        # Better be safe than sorry migration-wise.
+        ExecStartPre =
+          let preScript = pkgs.writers.writeBashBin "pleromaStartPre"
+            "${cfg.package}/bin/pleroma_ctl migrate";
+          in "${preScript}/bin/pleromaStartPre";
+
+        ExecStart = "${cfg.package}/bin/pleroma start";
+        ExecStop = "${cfg.package}/bin/pleroma stop";
+        ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
+
+        # Systemd sandboxing directives.
+        # Taken from the upstream contrib systemd service at
+        # pleroma/installation/pleroma.service
+        PrivateTmp = true;
+        ProtectHome = true;
+        ProtectSystem = "full";
+        PrivateDevices = false;
+        NoNewPrivileges = true;
+        CapabilityBoundingSet = "~CAP_SYS_ADMIN";
+      };
+    };
+
+  };
+  meta.maintainers = with lib.maintainers; [ ninjatrappeur ];
+}