nixos/go-neb: secret support
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@ -5,7 +5,8 @@ with lib;
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let
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cfg = config.services.go-neb;
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configFile = pkgs.writeText "config.yml" (builtins.toJSON cfg.config);
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settingsFormat = pkgs.formats.yaml {};
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configFile = settingsFormat.generate "config.yaml" cfg.config;
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in {
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options.services.go-neb = {
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enable = mkEnableOption "Extensible matrix bot written in Go";
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@ -16,13 +17,26 @@ in {
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default = ":4050";
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};
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secretFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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example = "/run/keys/go-neb.env";
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description = ''
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Environment variables from this file will be interpolated into the
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final config file using envsubst with this syntax: <literal>$ENVIRONMENT</literal>
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or <literal>''${VARIABLE}</literal>.
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The file should contain lines formatted as <literal>SECRET_VAR=SECRET_VALUE</literal>.
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This is useful to avoid putting secrets into the nix store.
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'';
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};
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baseUrl = mkOption {
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type = types.str;
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description = "Public-facing endpoint that can receive webhooks.";
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};
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config = mkOption {
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type = types.uniq types.attrs;
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inherit (settingsFormat) type;
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description = ''
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Your <filename>config.yaml</filename> as a Nix attribute set.
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See <link xlink:href="https://github.com/matrix-org/go-neb/blob/master/config.sample.yaml">config.sample.yaml</link>
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@ -32,18 +46,30 @@ in {
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};
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config = mkIf cfg.enable {
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systemd.services.go-neb = {
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systemd.services.go-neb = let
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finalConfigFile = if cfg.secretFile == null then configFile else "/var/run/go-neb/config.yaml";
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in {
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description = "Extensible matrix bot written in Go";
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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environment = {
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BASE_URL = cfg.baseUrl;
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BIND_ADDRESS = cfg.bindAddress;
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CONFIG_FILE = configFile;
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CONFIG_FILE = finalConfigFile;
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};
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serviceConfig = {
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ExecStartPre = lib.optional (cfg.secretFile != null)
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(pkgs.writeShellScript "pre-start" ''
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umask 077
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export $(xargs < ${cfg.secretFile})
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${pkgs.envsubst}/bin/envsubst -i "${configFile}" > ${finalConfigFile}
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chown go-neb ${finalConfigFile}
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'');
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PermissionsStartOnly = true;
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RuntimeDirectory = "go-neb";
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ExecStart = "${pkgs.go-neb}/bin/go-neb";
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User = "go-neb";
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DynamicUser = true;
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};
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};
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@ -10,10 +10,11 @@ import ./make-test-python.nix ({ pkgs, ... }:
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services.go-neb = {
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enable = true;
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baseUrl = "http://localhost";
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secretFile = pkgs.writeText "secrets" "ACCESS_TOKEN=changeme";
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config = {
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clients = [ {
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UserId = "@test:localhost";
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AccessToken = "changeme";
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AccessToken = "$ACCESS_TOKEN";
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HomeServerUrl = "http://localhost";
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Sync = false;
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AutoJoinRooms = false;
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@ -33,11 +34,10 @@ import ./make-test-python.nix ({ pkgs, ... }:
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testScript = ''
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start_all()
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server.wait_for_unit("go-neb.service")
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server.wait_until_succeeds(
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"curl -fL http://localhost:4050/services/hooks/d2lraXBlZGlhX3NlcnZpY2U"
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)
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server.wait_until_succeeds(
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"journalctl -eu go-neb -o cat | grep -q service_id=wikipedia_service"
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server.wait_until_succeeds("curl -fL http://localhost:4050/services/hooks/d2lraXBlZGlhX3NlcnZpY2U")
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server.succeed(
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"journalctl -eu go-neb -o cat | grep -q service_id=wikipedia_service",
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"grep -q changeme /var/run/go-neb/config.yaml",
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)
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'';
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