1 files changed, 158 insertions, 0 deletions

diff --git a/modules/webapps/etherpad-lite.nix b/modules/webapps/etherpad-lite.nix
new file mode 100644
index 00000000..7f0e2ed4
--- /dev/null
+++ b/modules/webapps/etherpad-lite.nix
@@ -0,0 +1,158 @@
+{ lib, pkgs, config, ... }:
+let
+  name = "etherpad-lite";
+  cfg = config.services.etherpad-lite;
+
+  uid = config.ids.uids.etherpad-lite;
+  gid = config.ids.gids.etherpad-lite;
+in
+{
+  options.services.etherpad-lite = {
+    enable = lib.mkEnableOption "Enable Etherpad lite’s service";
+    user = lib.mkOption {
+      type = lib.types.str;
+      default = name;
+      description = "User account under which Etherpad lite runs";
+    };
+    group = lib.mkOption {
+      type = lib.types.str;
+      default = name;
+      description = "Group under which Etherpad lite runs";
+    };
+    dataDir = lib.mkOption {
+      type = lib.types.path;
+      default = "/var/lib/${name}";
+      description = ''
+        The directory where Etherpad lite stores its data.
+      '';
+    };
+    socketsDir = lib.mkOption {
+      type = lib.types.path;
+      default = "/run/${name}";
+      description = ''
+        The directory where Etherpad lite stores its sockets.
+      '';
+    };
+    configFile = lib.mkOption {
+      type = lib.types.path;
+      description = ''
+        The config file path for Etherpad lite.
+        '';
+    };
+    sessionKeyFile = lib.mkOption {
+      type = lib.types.path;
+      description = ''
+        The Session key file path for Etherpad lite.
+        '';
+    };
+    apiKeyFile = lib.mkOption {
+      type = lib.types.path;
+      description = ''
+        The API key file path for Etherpad lite.
+        '';
+    };
+    package = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.webapps.etherpad-lite;
+      description = ''
+        Etherpad lite package to use.
+        '';
+    };
+    modules = lib.mkOption {
+      type = lib.types.listOf lib.types.package;
+      default = [];
+      description = ''
+        Etherpad lite modules to use.
+        '';
+    };
+    # Output variables
+    workdir = lib.mkOption {
+      type = lib.types.package;
+      default = cfg.package.withModules cfg.modules;
+      description = ''
+      Adjusted Etherpad lite package with plugins
+      '';
+      readOnly = true;
+    };
+    systemdStateDirectory = lib.mkOption {
+      type = lib.types.str;
+      # Use ReadWritePaths= instead if varDir is outside of /var/lib
+      default = assert lib.strings.hasPrefix "/var/lib/" cfg.dataDir;
+        lib.strings.removePrefix "/var/lib/" cfg.dataDir;
+      description = ''
+      Adjusted Etherpad lite data directory for systemd
+      '';
+      readOnly = true;
+    };
+    systemdRuntimeDirectory = lib.mkOption {
+      type = lib.types.str;
+      # Use ReadWritePaths= instead if socketsDir is outside of /run
+      default = assert lib.strings.hasPrefix "/run/" cfg.socketsDir;
+        lib.strings.removePrefix "/run/" cfg.socketsDir;
+      description = ''
+      Adjusted Etherpad lite sockets directory for systemd
+      '';
+      readOnly = true;
+    };
+    sockets = lib.mkOption {
+      type = lib.types.attrsOf lib.types.path;
+      default = {
+        node  = "${cfg.socketsDir}/etherpad-lite.sock";
+      };
+      readOnly = true;
+      description = ''
+        Etherpad lite sockets
+        '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.services.etherpad-lite = {
+      description = "Etherpad-lite";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" "postgresql.service" ];
+      wants = [ "postgresql.service" ];
+
+      environment.NODE_ENV = "production";
+      environment.HOME = cfg.workdir;
+
+      path = [ pkgs.nodejs ];
+
+      script = ''
+        exec ${pkgs.nodejs}/bin/node ${cfg.workdir}/src/node/server.js \
+          --sessionkey ${cfg.sessionKeyFile} \
+          --apikey ${cfg.apiKeyFile} \
+          --settings ${cfg.configFile}
+      '';
+
+      postStart = ''
+        while [ ! -S ${cfg.sockets.node} ]; do
+          sleep 0.5
+        done
+        chmod a+w ${cfg.sockets.node}
+        '';
+      serviceConfig = {
+        DynamicUser = true;
+        User = cfg.user;
+        Group = cfg.group;
+        WorkingDirectory = cfg.workdir;
+        PrivateTmp = true;
+        NoNewPrivileges = true;
+        PrivateDevices = true;
+        ProtectHome = true;
+        ProtectControlGroups = true;
+        ProtectKernelModules = true;
+        Restart = "always";
+        Type = "simple";
+        TimeoutSec = 60;
+        RuntimeDirectory = cfg.systemdRuntimeDirectory;
+        StateDirectory= cfg.systemdStateDirectory;
+        ExecStartPre = [
+          "+${pkgs.coreutils}/bin/install -d -m 0755 -o ${cfg.user} -g ${cfg.group} ${cfg.dataDir}/ep_initialized"
+          "+${pkgs.coreutils}/bin/chown -R ${cfg.user}:${cfg.group} ${cfg.dataDir} ${cfg.configFile} ${cfg.sessionKeyFile} ${cfg.apiKeyFile}"
+        ];
+      };
+    };
+
+  };
+}