feat: add mastodon module

README.md

@@ -31,14 +31,28 @@ module has options, they can be found in the `options.nix` file inside the
 module directory. More general options used by multiple modules are documented
 in `modules/options.nix`.
 
-### Module Checklist
+### Modules
+
+Modules listed here may be unimplemented or unfinished.
+
+#### Basic
 
 - [x] `basic` - Basic Internet support
 - [x] `ssh` - SSH support
-- [ ] `site` - Static site hosting
 - [x] `fail2ban` - IP moderation
+
+#### Public Sites
+
+- [ ] `site` - Static site hosting
 - [x] `forgejo` - Code forge
+
+#### Social
+
+- [x] `mastodon` - Mastodon server instance
 - [ ] `mail` - Mail server
+
+#### Storage
+
 - [ ] `cachix` - Nix build caching
 - [ ] `backup` - Automated backup system
 

aether/config.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, aether, forgejo-tokyo-night, ... }:
+{ pkgs, aether, forgejo-tokyo-night, ... }:
 {
   networking.hostName = "toki-aether";
   time.timeZone = "America/New_York";
@@ -65,5 +65,14 @@
     federation.ENABLED = true;
   };
 
+  aether.mastodon.subdomain = "social";
+  services.mastodon = {
+    package = pkgs.mastodon.override {
+      patches = [ ./mastodon/increase_limits.patch ];
+    };
+    extraConfig.SINGLE_USER_MODE = "true";
+    streamingProcesses = 3;
+  };
+
   system.stateVersion = "24.05";
 }

aether/mastodon/increase_limits.patch

@@ -0,0 +1,41 @@
+diff --git a/app/javascript/mastodon/features/compose/containers/compose_form_container.js b/app/javascript/mastodon/features/compose/containers/compose_form_container.js
+index bda2edb..1be1ce2 100644
+--- a/app/javascript/mastodon/features/compose/containers/compose_form_container.js
++++ b/app/javascript/mastodon/features/compose/containers/compose_form_container.js
+@@ -28,7 +28,7 @@ const mapStateToProps = state => ({
+   anyMedia: state.getIn(['compose', 'media_attachments']).size > 0,
+   isInReply: state.getIn(['compose', 'in_reply_to']) !== null,
+   lang: state.getIn(['compose', 'language']),
+-  maxChars: state.getIn(['server', 'server', 'configuration', 'statuses', 'max_characters'], 500),
++  maxChars: state.getIn(['server', 'server', 'configuration', 'statuses', 'max_characters'], 1000000),
+ });
+ 
+ const mapDispatchToProps = (dispatch) => ({
+diff --git a/app/validators/poll_validator.rb b/app/validators/poll_validator.rb
+index a327277..5d3134d 100644
+--- a/app/validators/poll_validator.rb
++++ b/app/validators/poll_validator.rb
+@@ -1,8 +1,8 @@
+ # frozen_string_literal: true
+ 
+ class PollValidator < ActiveModel::Validator
+-  MAX_OPTIONS      = 4
+-  MAX_OPTION_CHARS = 50
++  MAX_OPTIONS      = 100
++  MAX_OPTION_CHARS = 1000
+   MAX_EXPIRATION   = 1.month.freeze
+   MIN_EXPIRATION   = 5.minutes.freeze
+ 
+diff --git a/app/validators/status_length_validator.rb b/app/validators/status_length_validator.rb
+index dc841de..f0f1b25 100644
+--- a/app/validators/status_length_validator.rb
++++ b/app/validators/status_length_validator.rb
+@@ -1,7 +1,7 @@
+ # frozen_string_literal: true
+ 
+ class StatusLengthValidator < ActiveModel::Validator
+-  MAX_CHARS = 500
++  MAX_CHARS = 1000000
+   URL_PLACEHOLDER_CHARS = 23
+   URL_PLACEHOLDER = 'x' * 23
+ 

modules/mastodon/default.nix

@@ -0,0 +1,37 @@
+{ config, lib, ... }:
+let
+  cfg = config.aether.mastodon;
+  mastodon = config.services.mastodon;
+
+  useSubdomain = !(builtins.isNull cfg.subdomain);
+  domain = lib.optionalString useSubdomain "${cfg.subdomain}."
+           + config.aether.domain;
+in {
+  imports = [ ./options.nix ];
+
+  services.mastodon = {
+    enable = true;
+    user = cfg.user;
+    group = mastodon.user;
+    localDomain = domain;
+    configureNginx = true;
+    smtp.fromAddress = cfg.email;
+  };
+
+  security.acme.acceptTerms = true;
+  security.acme.defaults.email = config.aether.acmeEmail;
+
+  networking.firewall.allowedTCPPorts = [ 80 443 ];
+
+  users.users = lib.mkIf (cfg.createUser && mastodon.user != "mastodon") {
+    ${mastodon.user} = {
+      home = mastodon.package;
+      useDefaultShell = true;
+      group = mastodon.group;
+      isSystemUser = true;
+    };
+  };
+  users.groups = lib.mkIf (cfg.createUser && mastodon.group != "mastodon") {
+    ${mastodon.group} = {};
+  };
+}

modules/mastodon/options.nix

@@ -0,0 +1,42 @@
+{ config, lib, ... }:
+{
+  imports = [ ../options.nix ];
+
+  options.aether = {
+    mastodon = {
+      subdomain = lib.mkOption {
+        type = lib.types.nullOr lib.types.str;
+        default = "mastodon";
+        description = ''
+          The subdomain to host Mastodon under.
+
+          If null, then Mastodon is hosted at the domain itself.
+        '';
+      };
+
+      user = lib.mkOption {
+        type = lib.types.str;
+        default = "mastodon";
+        description = ''
+          The user to run Mastodon with.
+        '';
+      };
+
+      createUser = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = ''
+          Whether to create the Mastodon user automatically.
+        '';
+      };
+
+      email = lib.mkOption {
+        type = lib.types.str;
+        default = config.aether.acmeEmail;
+        description = ''
+          The email address used by Mastodon to send emails from.
+        '';
+      };
+    };
+  };
+}