feat(project)!: support nixos-rebuild and hydra

7 files changed, 682 insertions, 4 deletions

diff --git a/modules/services/git-daemon/_git-daemon-module.nix b/modules/services/git-daemon/_git-daemon-module.nix
new file mode 100644
index 0000000..76b395e
--- /dev/null
+++ b/modules/services/git-daemon/_git-daemon-module.nix
@@ -0,0 +1,137 @@
+{ config, lib, pkgs, ... }:
+with lib;
+let
+
+  cfg = config.services.gitDaemon;
+
+in
+{
+
+  ###### interface
+
+  options = {
+    services.gitDaemon = {
+
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = lib.mdDoc ''
+          Enable Git daemon, which allows public hosting of git repositories
+          without any access controls. This is mostly intended for read-only access.
+
+          You can allow write access by setting daemon.receivepack configuration
+          item of the repository to true. This is solely meant for a closed LAN setting
+          where everybody is friendly.
+
+          If you need any access controls, use something else.
+        '';
+      };
+
+      basePath = mkOption {
+        type = types.str;
+        default = "";
+        example = "/srv/git/";
+        description = lib.mdDoc ''
+          Remap all the path requests as relative to the given path. For example,
+          if you set base-path to /srv/git, then if you later try to pull
+          git://example.com/hello.git, Git daemon will interpret the path as /srv/git/hello.git.
+        '';
+      };
+
+      exportAll = mkOption {
+        type = types.bool;
+        default = false;
+        description = lib.mdDoc ''
+          Publish all directories that look like Git repositories (have the objects
+          and refs subdirectories), even if they do not have the git-daemon-export-ok file.
+
+          If disabled, you need to touch .git/git-daemon-export-ok in each repository
+          you want the daemon to publish.
+
+          Warning: enabling this without a repository whitelist or basePath
+          publishes every git repository you have.
+        '';
+      };
+
+      repositories = mkOption {
+        type = types.listOf types.str;
+        default = [ ];
+        example = [ "/srv/git" "/home/user/git/repo2" ];
+        description = lib.mdDoc ''
+          A whitelist of paths of git repositories, or directories containing repositories
+          all of which would be published. Paths must not end in "/".
+
+          Warning: leaving this empty and enabling exportAll publishes all
+          repositories in your filesystem or basePath if specified.
+        '';
+      };
+
+      listenAddress = mkOption {
+        type = types.str;
+        default = "";
+        example = "example.com";
+        description = lib.mdDoc "Listen on a specific IP address or hostname.";
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 9418;
+        description = lib.mdDoc "Port to listen on.";
+      };
+
+      options = mkOption {
+        type = types.str;
+        default = "";
+        description = lib.mdDoc "Extra configuration options to be passed to Git daemon.";
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "git";
+        description = lib.mdDoc "User under which Git daemon would be running.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "git";
+        description = lib.mdDoc "Group under which Git daemon would be running.";
+      };
+
+      createUserAndGroup = mkOption {
+        type = types.bool;
+        default = true;
+        description = lib.mdDoc ''
+          Create the specified group and user.
+          Disable this option if you want to use the existing user
+        '';
+      };
+    };
+  };
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    users.users.${cfg.user} = optionalAttrs (cfg.createUserAndGroup == true) {
+      uid = config.ids.uids.git;
+      group = cfg.group;
+      description = "Git daemon user";
+    };
+
+    users.groups.${cfg.group} = optionalAttrs (cfg.createUserAndGroup == true) {
+      gid = config.ids.gids.git;
+    };
+
+    systemd.services.git-daemon = {
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      script = "${pkgs.git}/bin/git daemon --reuseaddr "
+        + (optionalString (cfg.basePath != "") "--base-path=${cfg.basePath} ")
+        + (optionalString (cfg.listenAddress != "") "--listen=${cfg.listenAddress} ")
+        + "--port=${toString cfg.port} --user=${cfg.user} --group=${cfg.group} ${cfg.options} "
+        + "--verbose " + (optionalString cfg.exportAll "--export-all ") + concatStringsSep " " cfg.repositories;
+    };
+
+  };
+
+}
diff --git a/modules/services/git-daemon.nix b/modules/services/git-daemon/default.nix
index 5d027de..bc06342 100644
--- a/modules/services/git-daemon.nix
+++ b/modules/services/git-daemon/default.nix
@@ -10,7 +10,7 @@ in
   ];
 
   imports = [
-    ../../overlays/git-daemon-module.nix
+    ./_git-daemon-module.nix
   ];
 
   options.modules.services.gitDaemon = {
diff --git a/modules/services/matrix-bridge/_mautrix-discord-module.nix b/modules/services/matrix-bridge/_mautrix-discord-module.nix
new file mode 100644
index 0000000..36cafe6
--- /dev/null
+++ b/modules/services/matrix-bridge/_mautrix-discord-module.nix
@@ -0,0 +1,205 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  dataDir = "/var/lib/mautrix-discord";
+  registrationFile = "${dataDir}/discord-registration.yaml";
+  cfg = config.services.mautrix-discord;
+  settingsFormat = pkgs.formats.json { };
+  settingsFile = "${dataDir}/config.json";
+  settingsFileUnsubstituted = settingsFormat.generate "mautrix-discord-config.json" cfg.settings;
+
+in
+{
+  options = {
+    services.mautrix-discord = {
+      enable = mkEnableOption (lib.mdDoc "Mautrix-discord, a Matrix-discord puppeting bridge.");
+
+      package = mkOption { type = types.package; default = pkgs.mautrix-discord; };
+
+      settings = mkOption rec {
+        apply = recursiveUpdate default;
+        inherit (settingsFormat) type;
+        default = {
+          homeserver = {
+            software = "standard";
+          };
+
+          appservice = rec {
+            database = "sqlite:///${dataDir}/mautrix-discord.db";
+            database_opts = { };
+            hostname = "localhost";
+            port = 8080;
+            address = "http://localhost:${toString port}";
+          };
+
+          bridge = {
+            permissions."*" = "relay";
+            relay.whitelist = [ ];
+            double_puppet_server_map = { };
+            login_shared_secret_map = { };
+          };
+
+          logging = {
+            min_level = "debug";
+            writers = [
+              {
+                type = "stdout";
+                format = "pretty-colored";
+              }
+            ];
+          };
+        };
+        example = literalExpression ''
+          {
+            homeserver = {
+              address = "http://localhost:8008";
+              domain = "public-domain.tld";
+            };
+
+            appservice.public = {
+              prefix = "/public";
+              external = "https://public-appservice-address/public";
+            };
+
+            bridge.permissions = {
+              "example.com" = "full";
+              "@admin:example.com" = "admin";
+            };
+          }
+        '';
+        description = lib.mdDoc ''
+          {file}`config.yaml` configuration as a Nix attribute set.
+          Configuration options should match those described in
+          [example-config.yaml](https://github.com/mautrix/discord/blob/master/discord/example-config.yaml).
+
+          Secret tokens should be specified using {option}`environmentFile`
+          instead of this world-readable attribute set.
+        '';
+      };
+
+      environmentFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = lib.mdDoc ''
+          File containing environment variables to be passed to the mautrix-discord service,
+          in which secret tokens can be specified securely by defining values for e.g.
+          `MAUTRIX_DISCORD_APPSERVICE_AS_TOKEN`,
+          `MAUTRIX_DISCORD_APPSERVICE_HS_TOKEN`,
+
+          These environment variables can also be used to set other options by
+          replacing hierarchy levels by `.`, converting the name to uppercase
+          and prepending `MAUTRIX_DISCORD_`.
+          For example, the first value above maps to
+          {option}`settings.appservice.as_token`.
+
+          The environment variable values can be prefixed with `json::` to have
+          them be parsed as JSON. For example, `login_shared_secret_map` can be
+          set as follows:
+          `MAUTRIX_DISCORD_BRIDGE_LOGIN_SHARED_SECRET_MAP=json::{"example.com":"secret"}`.
+        '';
+      };
+
+      serviceDependencies = mkOption {
+        type = with types; listOf str;
+        default = optional config.services.matrix-synapse.enable "matrix-synapse.service";
+        defaultText = literalExpression ''
+          optional config.services.matrix-synapse.enable "matrix-synapse.service"
+        '';
+        description = lib.mdDoc ''
+          List of Systemd services to require and wait for when starting the application service.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    users.users.mautrix-discord = {
+      isSystemUser = true;
+      group = "mautrix-discord";
+      home = dataDir;
+      description = "Mautrix-Discord bridge user";
+    };
+
+    users.groups.mautrix-discord = {};
+
+    systemd.services.mautrix-discord = {
+      description = "Mautrix-discord, a Matrix-discord puppeting bridge.";
+
+      wantedBy = [ "multi-user.target" ];
+      wants = [ "network-online.target" ] ++ cfg.serviceDependencies;
+      after = [ "network-online.target" ] ++ cfg.serviceDependencies;
+
+      preStart = ''
+        # substitute the settings file by environment variables
+        # in this case read from EnvironmentFile
+        test -f '${settingsFile}' && rm -f '${settingsFile}'
+        old_umask=$(umask)
+        umask 0177
+        ${pkgs.envsubst}/bin/envsubst \
+          -o '${settingsFile}' \
+          -i '${settingsFileUnsubstituted}' \
+        umask $old_umask
+
+        # generate the appservice's registration file if absent
+        if [ ! -f '${registrationFile}' ]; then
+          ${pkgs.mautrix-discord}/bin/mautrix-discord \
+            --generate-registration \
+            --config='${settingsFile}' \
+            --registration='${registrationFile}'
+        fi
+        chmod 640 ${registrationFile}
+
+        umask 0177
+        ${pkgs.yq}/bin/yq -s '.[0].appservice.as_token = .[1].as_token
+          | .[0].appservice.hs_token = .[1].hs_token
+          | .[0]' '${settingsFile}' '${registrationFile}' \
+          > '${settingsFile}.tmp'
+        mv '${settingsFile}.tmp' '${settingsFile}'
+        umask $old_umask
+      '';
+
+      serviceConfig = {
+        Type = "simple";
+        Restart = "on-failure";
+
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+        NoNewPrivileges = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectKernelLogs = true;
+        ProtectControlGroups = true;
+        ProtectClock = true;
+        ProtectHostname = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+
+        SystemCallArchitectures = "native";
+        SystemCallErrorNumber = "EPERM";
+        SystemCallFilter = ["@system-service"];
+
+        PrivateTmp = true;
+        PrivateDevices = true;
+        PrivateUsers = true;
+
+        User = "mautrix-discord";
+        Group = "mautrix-discord";
+        WorkingDirectory = dataDir;
+        StateDirectory = baseNameOf dataDir;
+        UMask = "0027";
+        EnvironmentFile = cfg.environmentFile;
+
+        ExecStart = ''
+          ${cfg.package}/bin/mautrix-discord \
+            --config='${settingsFile}' \
+            --registration='${registrationFile}'
+        '';
+      };
+      restartTriggers = [settingsFileUnsubstituted];
+    };
+  };
+}
diff --git a/modules/services/matrix-bridge/_mautrix-signal-module.nix b/modules/services/matrix-bridge/_mautrix-signal-module.nix
new file mode 100644
index 0000000..983d635
--- /dev/null
+++ b/modules/services/matrix-bridge/_mautrix-signal-module.nix
@@ -0,0 +1,204 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  dataDir = "/var/lib/mautrix-signal";
+  registrationFile = "${dataDir}/signal-registration.yaml";
+  cfg = config.services.mautrix-signal;
+  settingsFormat = pkgs.formats.json { };
+  settingsFile = "${dataDir}/config.json";
+  settingsFileUnsubstituted =
+    settingsFormat.generate "mautrix-signal-config.json" cfg.settings;
+
+in
+{
+  # NOTE(2024-01-11): Upstream has been moved to a Go version.
+  # Environment-based credential setting might not work.
+  options = {
+    services.mautrix-signal = {
+      enable = mkEnableOption (lib.mdDoc "Mautrix-Signal, a Matrix-Signal puppeting bridge.");
+
+      package = mkOption { type = types.package; default = pkgs.mautrix-signal; };
+
+      settings = mkOption rec {
+        apply = recursiveUpdate default;
+        inherit (settingsFormat) type;
+        default = {
+          homeserver = {
+            software = "standard";
+          };
+
+          appservice = rec {
+            database = "sqlite:///${dataDir}/mautrix-signal.db";
+            database_opts = { };
+            hostname = "localhost";
+            port = 8080;
+            address = "http://localhost:${toString port}";
+          };
+
+          signal.socket_path = config.services.signald.socketPath;
+
+          bridge = {
+            permissions."*" = "relay";
+            relay.whitelist = [ ];
+            double_puppet_server_map = { };
+            login_shared_secret_map = { };
+          };
+
+          logging = {
+            min_level = "debug";
+            writers = [
+              {
+                type = "stdout";
+                format = "pretty-colored";
+              }
+            ];
+          };
+        };
+        example = literalExpression ''
+          {
+            homeserver = {
+              address = "http://localhost:8008";
+              domain = "public-domain.tld";
+            };
+
+            appservice.public = {
+              prefix = "/public";
+              external = "https://public-appservice-address/public";
+            };
+
+            bridge.permissions = {
+              "example.com" = "full";
+              "@admin:example.com" = "admin";
+            };
+          }
+        '';
+        description = lib.mdDoc ''
+          {file}`config.yaml` configuration as a Nix attribute set.
+          Configuration options should match those described in
+          [example-config.yaml](https://github.com/mautrix/signal/blob/master/signal/example-config.yaml).
+
+          Secret tokens should be specified using {option}`environmentFile`
+          instead of this world-readable attribute set.
+        '';
+      };
+
+      environmentFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = lib.mdDoc ''
+          File containing environment variables to be passed to the mautrix-signal service,
+          in which secret tokens can be specified securely by defining values for e.g.
+          `MAUTRIX_SIGNAL_APPSERVICE_AS_TOKEN`,
+          `MAUTRIX_SIGNAL_APPSERVICE_HS_TOKEN`,
+
+          These environment variables can also be used to set other options by
+          replacing hierarchy levels by `.`, converting the name to uppercase
+          and prepending `MAUTRIX_SIGNAL_`.
+          For example, the first value above maps to
+          {option}`settings.appservice.as_token`.
+
+          The environment variable values can be prefixed with `json::` to have
+          them be parsed as JSON. For example, `login_shared_secret_map` can be
+          set as follows:
+          `MAUTRIX_SIGNAL_BRIDGE_LOGIN_SHARED_SECRET_MAP=json::{"example.com":"secret"}`.
+        '';
+      };
+
+      serviceDependencies = mkOption {
+        type = with types; listOf str;
+        default = optional config.services.matrix-synapse.enable "matrix-synapse.service";
+        defaultText = literalExpression ''
+          optional config.services.matrix-synapse.enable "matrix-synapse.service"
+        '';
+        description = lib.mdDoc ''
+          List of Systemd services to require and wait for when starting the application service.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.signald.enable = true;
+
+    systemd.services.mautrix-signal = {
+      description = "Mautrix-Signal, a Matrix-Signal puppeting bridge.";
+
+      wantedBy = [ "multi-user.target" ];
+      wants = [ "network-online.target" ] ++ cfg.serviceDependencies;
+      after = [ "network-online.target" ] ++ cfg.serviceDependencies;
+      path = [ pkgs.lottieconverter pkgs.ffmpeg-full ];
+
+      # TODO(2023-01-11): Still relevant in Go version?
+      # mautrix-signal tries to generate a dotfile in the home directory of
+      # the running user if using a postgresql database:
+      #
+      #  File "python3.10/site-packages/asyncpg/connect_utils.py", line 257, in _dot_postgre>
+      #    return (pathlib.Path.home() / '.postgresql' / filename).resolve()
+      #  File "python3.10/pathlib.py", line 1000, in home
+      #    return cls("~").expanduser()
+      #  File "python3.10/pathlib.py", line 1440, in expanduser
+      #    raise RuntimeError("Could not determine home directory.")
+      # RuntimeError: Could not determine home directory.
+      environment.HOME = dataDir;
+
+      preStart = ''
+        # substitute the settings file by environment variables
+        # in this case read from EnvironmentFile
+        test -f '${settingsFile}' && rm -f '${settingsFile}'
+        old_umask=$(umask)
+        umask 0177
+        ${pkgs.envsubst}/bin/envsubst \
+          -o '${settingsFile}' \
+          -i '${settingsFileUnsubstituted}' \
+        umask $old_umask
+
+        # generate the appservice's registration file if absent
+        if [ ! -f '${registrationFile}' ]; then
+          ${cfg.package}/bin/mautrix-signal \
+            --generate-registration \
+            --config='${settingsFile}' \
+            --registration='${registrationFile}'
+        fi
+        chmod 640 ${registrationFile}
+
+        umask 0177
+        ${pkgs.yq}/bin/yq -s '.[0].appservice.as_token = .[1].as_token
+          | .[0].appservice.hs_token = .[1].hs_token
+          | .[0]' '${settingsFile}' '${registrationFile}' \
+          > '${settingsFile}.tmp'
+        mv '${settingsFile}.tmp' '${settingsFile}'
+        umask $old_umask
+      '';
+
+      serviceConfig = {
+        Type = "simple";
+        Restart = "always";
+
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectControlGroups = true;
+
+        DynamicUser = true;
+        SupplementaryGroups = [ "signald" ];
+        PrivateTmp = true;
+        WorkingDirectory = cfg.package; # necessary for the database migration scripts to be found
+        StateDirectory = baseNameOf dataDir;
+        UMask = "0027";
+        EnvironmentFile = cfg.environmentFile;
+
+        ExecStart = ''
+          ${cfg.package}/bin/mautrix-signal \
+            --config='${settingsFile}'
+        '';
+
+      restartTriggers = [settingsFileUnsubstituted];
+      };
+    };
+  };
+
+  # meta.maintainers = with maintainers; [ boppyt ];
+}
diff --git a/modules/services/matrix-bridge.nix b/modules/services/matrix-bridge/default.nix
index 3ea46d8..4d53223 100644
--- a/modules/services/matrix-bridge.nix
+++ b/modules/services/matrix-bridge/default.nix
@@ -6,8 +6,8 @@ let
 in
 {
   imports = [
-    ../../overlays/mautrix-signal-module.nix
-    ../../overlays/mautrix-discord-module.nix
+    ./_mautrix-signal-module.nix
+    ./_mautrix-discord-module.nix
   ];
 
   options.modules.services.matrix-bridge = {
diff --git a/modules/services/soju/_soju-module.nix b/modules/services/soju/_soju-module.nix
new file mode 100644
index 0000000..d14082c
--- /dev/null
+++ b/modules/services/soju/_soju-module.nix
@@ -0,0 +1,132 @@
+# Not an overlay, module replacement
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.soju;
+  stateDir = "/var/lib/soju";
+  listenCfg = concatMapStringsSep "\n" (l: "listen ${l}") cfg.listen;
+  tlsCfg = optionalString (cfg.tlsCertificate != null)
+    "tls ${cfg.tlsCertificate} ${cfg.tlsCertificateKey}";
+  logCfg = optionalString cfg.enableMessageLogging
+    "log fs ${stateDir}/logs";
+
+  configFile = pkgs.writeText "soju.conf" ''
+    ${listenCfg}
+    hostname ${cfg.hostName}
+    ${tlsCfg}
+    db sqlite3 ${stateDir}/soju.db
+    ${logCfg}
+    http-origin ${concatStringsSep " " cfg.httpOrigins}
+    accept-proxy-ip ${concatStringsSep " " cfg.acceptProxyIP}
+
+    ${cfg.extraConfig}
+  '';
+in
+{
+  ###### interface
+
+  options.services.soju = {
+    enable = mkEnableOption (lib.mdDoc "soju");
+
+    listen = mkOption {
+      type = types.listOf types.str;
+      default = [ ":6697" ];
+      description = lib.mdDoc ''
+        Where soju should listen for incoming connections. See the
+        `listen` directive in
+        {manpage}`soju(1)`.
+      '';
+    };
+
+    hostName = mkOption {
+      type = types.str;
+      default = config.networking.hostName;
+      defaultText = literalExpression "config.networking.hostName";
+      description = lib.mdDoc "Server hostname.";
+    };
+
+    tlsCertificate = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      example = "/var/host.cert";
+      description = lib.mdDoc "Path to server TLS certificate.";
+    };
+
+    tlsCertificateKey = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      example = "/var/host.key";
+      description = lib.mdDoc "Path to server TLS certificate key.";
+    };
+
+    enableMessageLogging = mkOption {
+      type = types.bool;
+      default = true;
+      description = lib.mdDoc "Whether to enable message logging.";
+    };
+
+    httpOrigins = mkOption {
+      type = types.listOf types.str;
+      default = [ ];
+      description = lib.mdDoc ''
+        List of allowed HTTP origins for WebSocket listeners. The parameters are
+        interpreted as shell patterns, see
+        {manpage}`glob(7)`.
+      '';
+    };
+
+    acceptProxyIP = mkOption {
+      type = types.listOf types.str;
+      default = [ ];
+      description = lib.mdDoc ''
+        Allow the specified IPs to act as a proxy. Proxys have the ability to
+        overwrite the remote and local connection addresses (via the X-Forwarded-\*
+        HTTP header fields). The special name "localhost" accepts the loopback
+        addresses 127.0.0.0/8 and ::1/128. By default, all IPs are rejected.
+      '';
+    };
+
+    extraConfig = mkOption {
+      type = types.lines;
+      default = "";
+      description = lib.mdDoc "Lines added verbatim to the configuration file.";
+    };
+
+    extraGroups = mkOption {
+      type = types.listOf types.str;
+      default = [ ];
+      description = lib.mdDoc "Extra groups for the dynamic user.";
+    };
+  };
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = (cfg.tlsCertificate != null) == (cfg.tlsCertificateKey != null);
+        message = ''
+          services.soju.tlsCertificate and services.soju.tlsCertificateKey
+          must both be specified to enable TLS.
+        '';
+      }
+    ];
+
+    systemd.services.soju = {
+      description = "soju IRC bouncer";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      serviceConfig = {
+        DynamicUser = true;
+        SupplementaryGroups = cfg.extraGroups;
+        Restart = "always";
+        ExecStart = "${pkgs.soju}/bin/soju -config ${configFile}";
+        StateDirectory = "soju";
+      };
+    };
+  };
+
+  meta.maintainers = with maintainers; [ malvo ];
+}
diff --git a/modules/services/soju.nix b/modules/services/soju/default.nix
index b2f4faf..557222e 100644
--- a/modules/services/soju.nix
+++ b/modules/services/soju/default.nix
@@ -10,7 +10,7 @@ in
   ];
 
   imports = [
-    ../../overlays/soju-module.nix
+    ./_soju-module.nix
   ];
 
   options.modules.services.soju = {