Add support for bulwark, including package.

This makes omega-relay also a mail client so to speak,
though bulwark is mostly client-sided.

2 files changed, 155 insertions, 1 deletions

diff --git a/services/bulwark.nix b/services/bulwark.nix
new file mode 100644
index 0000000..b20125e
--- /dev/null
+++ b/services/bulwark.nix
@@ -0,0 +1,152 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+let
+  cfg = config.wilkuu.services.bulwark;
+  stalwart_cfg = config.wilkuu.services.stalwart;
+  hostname = config.networking.hostName;
+
+  # Importing stuff from stalwart and defaults etc.
+  _stalwart_jmap_domains = lib.optional stalwart_cfg.enable (
+    [ stalwart_cfg.domain ] ++ stalwart_cfg.additionalDomains
+  );
+
+  # Secrets handling
+  sopsPath = ../secrets/${hostname}/bulwark.yaml;
+  secrets = [
+    "admin_password"
+    "session_secret"
+    "oauth_secret"
+  ];
+  toSops = (sname: "bulwark/${sname}");
+  toCredfilePath = (name: config.sops.secrets.${toSops name}.path);
+  toSopsPlaceholder = (name: config.sops.placeholder.${toSops name});
+
+  bulwark = pkgs.callPackage ../packages/bulwark/package.nix { };
+in
+{
+  options.wilkuu.services.bulwark = with lib; {
+    enable = mkEnableOption "Enable bulwark client";
+    doACME = mkEnableOption "Enable ACME for bulwark here";
+    package = mkOption {
+      type = types.package;
+      default = bulwark;
+      description = "The bulwark package to be used.";
+    };
+    domains = mkOption {
+      type = (types.listOf types.str);
+      default = [ ];
+      example = [ "bulwark.wilkuu.xyz" ];
+      description = "Domains for HTTP connections";
+    };
+    dataDir = mkOption {
+      type = types.path;
+      description = "Storage localtion for Bulwark user data";
+      default = "/var/lib/bulwark";
+      example = "/srv/data/bulwark";
+    };
+    jmap_servers = mkOption {
+      type = types.listOf types.str;
+      default = _stalwart_jmap_domains; # FIXME: What if someone does not want to use all of their stalwart domains here.
+      example = [ "jmap.example.com" ];
+      description = "A list of JMAP domains avalable for bulwark";
+    };
+    extraEnv = mkOption {
+      type = types.attrs; # TODO Better typing
+      default = { };
+      example = {
+        FAVICON_URL = "static.example.com/favicon.ico";
+      };
+      description = "Additional configuration, see https://bulwarkmail.org/docs/getting-started/configuration/environment-reference#server-listen-address for more info.";
+    };
+    stalwartInterop = mkOption {
+      type = types.bool;
+      default = stalwart_cfg.enable;
+      example = true;
+      description = "Whenever to allow stalwart-specific features.";
+    };
+
+  };
+
+  config.users = lib.mkIf cfg.enable {
+    users.bulwark = {
+      isSystemUser = true;
+      group = "uptimekuma";
+    };
+    groups.bulwark = { };
+  };
+
+  config.wilkuu.services.stalwart.corsDomains = lib.optionals (
+    cfg.enable && stalwart_cfg.enable
+  ) cfg.domains;
+  config.sops.secrets = (
+    lib.genAttrs (map toSops secrets) (_name: {
+      sopsFile = sopsPath;
+      mode = "0440";
+      owner = "bulwark";
+    })
+  );
+  config.sops.templates."bulwark-env" = lib.mkIf cfg.enable {
+    owner = "bulwark";
+    content =
+      pkgs.lib.generators.toKeyValue
+        {
+          mkKeyValue = key: value: "${key}=${lib.escapeShellArg (toString value)}";
+        }
+        {
+          STALWART_FEATURES = "${cfg.stalwartInterop}";
+          JMAP_SERVER_URL = lib.concatStringSep cfg.jmap_domains;
+          ADMIN_CONFIG_DIR = "${cfg.dataDir}/settings";
+          ADMIN_STATE_DIR = "${cfg.dataDir}/admin-state";
+
+          SETTINGS_SYNC_ENABLED = true;
+          SETTINGS_DATA_DIR = "${cfg.dataDir}/settings";
+
+          BULWARK_TELEMETRY = "off";
+          TELEMETRY_DATA_DIR = "${cfg.dataDir}/telemetry";
+          VERSION_CHECK_DATA_DIR = "${cfg.dataDir}/version-check";
+
+          SESSION_SECRET_FILE = toCredfilePath "session_secret";
+          ADMIN_PASSWORD = toSopsPlaceholder "admin_password";
+          EXTENSION_DIRECTORY_URL = "https://extensions.bulwarkmail.org";
+
+          # Put into a option module
+          OAUTH_ENABLED = true;
+          OAUTH_CLIENT_ID = "${hostname}-bulwark-webmail";
+          OAUTH_ONLY = false;
+          # OAUTH_CLIENT_SECRET_FILE = ...
+          # TODO: OAUTH_[EXTRA_]SCOPES
+
+          PORT = 3081;
+        }
+      // cfg.extraEnv;
+  };
+  config.services.nginx.virtualHosts = lib.mkIf cfg.enable (
+    lib.genAttrs cfg.domains (_vhost: {
+      addSSL = cfg.doACME;
+      enableACME = cfg.doACME;
+      locations."/" = {
+        proxyPass = "http://localhost:3081";
+        recommendedProxySettings = true;
+      };
+    })
+  );
+
+  config.systemd.services.bulwark = lib.mkIf cfg.enable ({
+    enable = cfg.enable;
+    serviceConfig = {
+      User = "bulwark";
+      AllowedPorts = 3081;
+      SocketBindAllow = "tcp:8080";
+      ExecStart = "${cfg.package}";
+      WorkingDirectory = "${cfg.dataDir}";
+      StateDirectory = "bulwark";
+      Restart = "always";
+      RestartSec = 5;
+      EnvironmentFile = config.sops.templates."bulwark-env".path;
+    };
+  });
+}
diff --git a/services/email.nix b/services/email.nix
index c05840d..7afc2b5 100644
--- a/services/email.nix
+++ b/services/email.nix
@@ -136,7 +136,7 @@ in
         lib.genAttrs (map toSops secrets) (_name: {
           sopsFile = sopsPath;
           mode = "0440";
-          owner = "stalwart-mail";
+          owner = "stalwart";
         })
       );
 
@@ -147,6 +147,8 @@ in
               "mta-sts.txt"
               "mail-v1.xml"
               "autoconfig/mail"
+              "openid-configuration"
+              "/.well-known/oauth-authorization-server"
             ])
             // (lib.genAttrs [ "/.well-known/caldav/" "/.well-known/webdav/" "/.well-known/jmap" ] (uri: {
               extraConfig = ''