486 lines
14 KiB
Nix
486 lines
14 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (builtins) toString;
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inherit (lib) types mkIf mkOption mkDefault;
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inherit (lib) optional optionals optionalAttrs optionalString;
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inherit (pkgs) sqlite;
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format = pkgs.formats.ini {
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mkKeyValue = key: value:
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let
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value' = lib.optionalString (value != null)
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(if builtins.isBool value then
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if value == true then "true" else "false"
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else
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toString value);
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in "${key} = ${value'}";
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};
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cfg = config.services.writefreely;
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isSqlite = cfg.database.type == "sqlite3";
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isMysql = cfg.database.type == "mysql";
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isMysqlLocal = isMysql && cfg.database.createLocally == true;
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hostProtocol = if cfg.acme.enable then "https" else "http";
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settings = cfg.settings // {
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app = cfg.settings.app or { } // {
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host = cfg.settings.app.host or "${hostProtocol}://${cfg.host}";
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};
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database = if cfg.database.type == "sqlite3" then {
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type = "sqlite3";
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filename = cfg.settings.database.filename or "writefreely.db";
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database = cfg.database.name;
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} else {
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type = "mysql";
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username = cfg.database.user;
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password = "#dbpass#";
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database = cfg.database.name;
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host = cfg.database.host;
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port = cfg.database.port;
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tls = cfg.database.tls;
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};
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server = cfg.settings.server or { } // {
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bind = cfg.settings.server.bind or "localhost";
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gopher_port = cfg.settings.server.gopher_port or 0;
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autocert = !cfg.nginx.enable && cfg.acme.enable;
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templates_parent_dir =
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cfg.settings.server.templates_parent_dir or cfg.package.src;
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static_parent_dir = cfg.settings.server.static_parent_dir or assets;
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pages_parent_dir =
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cfg.settings.server.pages_parent_dir or cfg.package.src;
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keys_parent_dir = cfg.settings.server.keys_parent_dir or cfg.stateDir;
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};
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};
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configFile = format.generate "config.ini" settings;
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assets = pkgs.stdenvNoCC.mkDerivation {
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pname = "writefreely-assets";
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inherit (cfg.package) version src;
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nativeBuildInputs = with pkgs.nodePackages; [ less ];
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buildPhase = ''
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mkdir -p $out
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cp -r static $out/
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'';
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installPhase = ''
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less_dir=$src/less
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css_dir=$out/static/css
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lessc $less_dir/app.less $css_dir/write.css
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lessc $less_dir/fonts.less $css_dir/fonts.css
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lessc $less_dir/icons.less $css_dir/icons.css
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lessc $less_dir/prose.less $css_dir/prose.css
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'';
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};
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withConfigFile = text: ''
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db_pass=${
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optionalString (cfg.database.passwordFile != null)
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"$(head -n1 ${cfg.database.passwordFile})"
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}
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cp -f ${configFile} '${cfg.stateDir}/config.ini'
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sed -e "s,#dbpass#,$db_pass,g" -i '${cfg.stateDir}/config.ini'
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chmod 440 '${cfg.stateDir}/config.ini'
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${text}
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'';
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withMysql = text:
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withConfigFile ''
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query () {
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local result=$(${config.services.mysql.package}/bin/mysql \
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--user=${cfg.database.user} \
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--password=$db_pass \
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--database=${cfg.database.name} \
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--silent \
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--raw \
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--skip-column-names \
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--execute "$1" \
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)
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echo $result
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}
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${text}
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'';
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withSqlite = text:
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withConfigFile ''
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query () {
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local result=$(${sqlite}/bin/sqlite3 \
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'${cfg.stateDir}/${settings.database.filename}' \
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"$1" \
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)
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echo $result
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}
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${text}
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'';
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in {
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options.services.writefreely = {
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enable =
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lib.mkEnableOption (lib.mdDoc "Writefreely, build a digital writing community");
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package = lib.mkOption {
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type = lib.types.package;
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default = pkgs.writefreely;
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defaultText = lib.literalExpression "pkgs.writefreely";
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description = lib.mdDoc "Writefreely package to use.";
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};
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stateDir = mkOption {
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type = types.path;
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default = "/var/lib/writefreely";
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description = lib.mdDoc "The state directory where keys and data are stored.";
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};
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user = mkOption {
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type = types.str;
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default = "writefreely";
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description = lib.mdDoc "User under which Writefreely is ran.";
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};
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group = mkOption {
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type = types.str;
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default = "writefreely";
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description = lib.mdDoc "Group under which Writefreely is ran.";
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};
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host = mkOption {
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type = types.str;
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default = "";
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description = lib.mdDoc "The public host name to serve.";
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example = "example.com";
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};
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settings = mkOption {
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default = { };
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description = lib.mdDoc ''
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Writefreely configuration ({file}`config.ini`). Refer to
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<https://writefreely.org/docs/latest/admin/config>
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for details.
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'';
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type = types.submodule {
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freeformType = format.type;
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options = {
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app = {
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theme = mkOption {
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type = types.str;
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default = "write";
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description = lib.mdDoc "The theme to apply.";
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};
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};
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server = {
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port = mkOption {
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type = types.port;
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default = if cfg.nginx.enable then 18080 else 80;
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defaultText = "80";
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description = lib.mdDoc "The port WriteFreely should listen on.";
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};
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};
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};
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};
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};
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database = {
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type = mkOption {
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type = types.enum [ "sqlite3" "mysql" ];
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default = "sqlite3";
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description = lib.mdDoc "The database provider to use.";
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};
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name = mkOption {
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type = types.str;
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default = "writefreely";
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description = lib.mdDoc "The name of the database to store data in.";
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};
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user = mkOption {
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type = types.nullOr types.str;
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default = if cfg.database.type == "mysql" then "writefreely" else null;
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defaultText = "writefreely";
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description = lib.mdDoc "The database user to connect as.";
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};
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passwordFile = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = lib.mdDoc "The file to load the database password from.";
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};
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host = mkOption {
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type = types.str;
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default = "localhost";
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description = lib.mdDoc "The database host to connect to.";
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};
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port = mkOption {
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type = types.port;
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default = 3306;
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description = lib.mdDoc "The port used when connecting to the database host.";
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};
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tls = mkOption {
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type = types.bool;
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default = false;
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description =
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lib.mdDoc "Whether or not TLS should be used for the database connection.";
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};
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migrate = mkOption {
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type = types.bool;
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default = true;
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description =
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lib.mdDoc "Whether or not to automatically run migrations on startup.";
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};
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createLocally = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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When {option}`services.writefreely.database.type` is set to
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`"mysql"`, this option will enable the MySQL service locally.
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'';
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};
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};
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admin = {
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name = mkOption {
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type = types.nullOr types.str;
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description = lib.mdDoc "The name of the first admin user.";
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default = null;
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};
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initialPasswordFile = mkOption {
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type = types.path;
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description = lib.mdDoc ''
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Path to a file containing the initial password for the admin user.
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If not provided, the default password will be set to `nixos`.
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'';
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default = pkgs.writeText "default-admin-pass" "nixos";
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defaultText = "/nix/store/xxx-default-admin-pass";
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};
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};
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nginx = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description =
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lib.mdDoc "Whether or not to enable and configure nginx as a proxy for WriteFreely.";
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};
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forceSSL = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc "Whether or not to force the use of SSL.";
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};
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};
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acme = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description =
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lib.mdDoc "Whether or not to automatically fetch and configure SSL certs.";
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};
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};
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};
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config = mkIf cfg.enable {
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assertions = [
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{
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assertion = cfg.host != "";
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message = "services.writefreely.host must be set";
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}
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{
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assertion = isMysqlLocal -> cfg.database.passwordFile != null;
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message =
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"services.writefreely.database.passwordFile must be set if services.writefreely.database.createLocally is set to true";
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}
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{
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assertion = isSqlite -> !cfg.database.createLocally;
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message =
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"services.writefreely.database.createLocally has no use when services.writefreely.database.type is set to sqlite3";
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}
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];
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users = {
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users = optionalAttrs (cfg.user == "writefreely") {
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writefreely = {
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group = cfg.group;
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home = cfg.stateDir;
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isSystemUser = true;
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};
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};
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groups =
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optionalAttrs (cfg.group == "writefreely") { writefreely = { }; };
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};
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systemd.tmpfiles.settings."10-writefreely".${cfg.stateDir}.d = {
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inherit (cfg) user group;
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mode = "0750";
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};
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systemd.services.writefreely = {
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after = [ "network.target" ]
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++ optional isSqlite "writefreely-sqlite-init.service"
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++ optional isMysql "writefreely-mysql-init.service"
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++ optional isMysqlLocal "mysql.service";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "simple";
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User = cfg.user;
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Group = cfg.group;
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WorkingDirectory = cfg.stateDir;
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Restart = "always";
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RestartSec = 20;
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ExecStart =
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"${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' serve";
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AmbientCapabilities =
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optionalString (settings.server.port < 1024) "cap_net_bind_service";
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};
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preStart = ''
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if ! test -d "${cfg.stateDir}/keys"; then
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mkdir -p ${cfg.stateDir}/keys
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# Key files end up with the wrong permissions by default.
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# We need to correct them so that Writefreely can read them.
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chmod -R 750 "${cfg.stateDir}/keys"
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${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' keys generate
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fi
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'';
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};
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systemd.services.writefreely-sqlite-init = mkIf isSqlite {
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Type = "oneshot";
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User = cfg.user;
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Group = cfg.group;
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WorkingDirectory = cfg.stateDir;
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ReadOnlyPaths = optional (cfg.admin.initialPasswordFile != null)
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cfg.admin.initialPasswordFile;
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};
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script = let
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migrateDatabase = optionalString cfg.database.migrate ''
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${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' db migrate
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'';
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createAdmin = optionalString (cfg.admin.name != null) ''
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if [[ $(query "SELECT COUNT(*) FROM users") == 0 ]]; then
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admin_pass=$(head -n1 ${cfg.admin.initialPasswordFile})
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${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' --create-admin ${cfg.admin.name}:$admin_pass
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fi
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'';
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in withSqlite ''
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if ! test -f '${settings.database.filename}'; then
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${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' db init
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fi
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${migrateDatabase}
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${createAdmin}
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'';
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};
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systemd.services.writefreely-mysql-init = mkIf isMysql {
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wantedBy = [ "multi-user.target" ];
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after = optional isMysqlLocal "mysql.service";
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serviceConfig = {
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Type = "oneshot";
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User = cfg.user;
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Group = cfg.group;
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WorkingDirectory = cfg.stateDir;
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ReadOnlyPaths = optional isMysqlLocal cfg.database.passwordFile
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++ optional (cfg.admin.initialPasswordFile != null)
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cfg.admin.initialPasswordFile;
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};
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script = let
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updateUser = optionalString isMysqlLocal ''
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# WriteFreely currently *requires* a password for authentication, so we
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# need to update the user in MySQL accordingly. By default MySQL users
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# authenticate with auth_socket or unix_socket.
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# See: https://github.com/writefreely/writefreely/issues/568
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${config.services.mysql.package}/bin/mysql --skip-column-names --execute "ALTER USER '${cfg.database.user}'@'localhost' IDENTIFIED VIA unix_socket OR mysql_native_password USING PASSWORD('$db_pass'); FLUSH PRIVILEGES;"
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'';
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migrateDatabase = optionalString cfg.database.migrate ''
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${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' db migrate
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'';
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createAdmin = optionalString (cfg.admin.name != null) ''
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if [[ $(query 'SELECT COUNT(*) FROM users') == 0 ]]; then
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admin_pass=$(head -n1 ${cfg.admin.initialPasswordFile})
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${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' --create-admin ${cfg.admin.name}:$admin_pass
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fi
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'';
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in withMysql ''
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${updateUser}
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if [[ $(query "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = '${cfg.database.name}'") == 0 ]]; then
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${cfg.package}/bin/writefreely -c '${cfg.stateDir}/config.ini' db init
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fi
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${migrateDatabase}
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${createAdmin}
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'';
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};
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services.mysql = mkIf isMysqlLocal {
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enable = true;
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package = mkDefault pkgs.mariadb;
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ensureDatabases = [ cfg.database.name ];
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ensureUsers = [{
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name = cfg.database.user;
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ensurePermissions = {
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"${cfg.database.name}.*" = "ALL PRIVILEGES";
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# WriteFreely requires the use of passwords, so we need permissions
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# to `ALTER` the user to add password support and also to reload
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# permissions so they can be used.
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"*.*" = "CREATE USER, RELOAD";
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};
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}];
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};
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services.nginx = lib.mkIf cfg.nginx.enable {
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enable = true;
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recommendedProxySettings = true;
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virtualHosts."${cfg.host}" = {
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enableACME = cfg.acme.enable;
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forceSSL = cfg.nginx.forceSSL;
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locations."/" = {
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proxyPass = "http://127.0.0.1:${toString settings.server.port}";
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};
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};
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};
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};
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}
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