367 lines
13 KiB
Nix
367 lines
13 KiB
Nix
{ config, pkgs, lib, ... }:
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let
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inherit (lib) mkDefault mkEnableOption mkForce mkIf mkMerge mkOption types;
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inherit (lib) any attrValues concatMapStringsSep flatten literalExample;
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inherit (lib) mapAttrs mapAttrs' mapAttrsToList nameValuePair optional optionalAttrs optionalString;
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eachSite = config.services.wordpress;
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user = "wordpress";
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group = config.services.httpd.group;
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stateDir = hostName: "/var/lib/wordpress/${hostName}";
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pkg = hostName: cfg: pkgs.stdenv.mkDerivation rec {
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pname = "wordpress-${hostName}";
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version = src.version;
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src = cfg.package;
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installPhase = ''
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mkdir -p $out
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cp -r * $out/
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# symlink the wordpress config
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ln -s ${wpConfig hostName cfg} $out/share/wordpress/wp-config.php
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# symlink uploads directory
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ln -s ${cfg.uploadsDir} $out/share/wordpress/wp-content/uploads
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# https://github.com/NixOS/nixpkgs/pull/53399
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#
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# Symlinking works for most plugins and themes, but Avada, for instance, fails to
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# understand the symlink, causing its file path stripping to fail. This results in
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# requests that look like: https://example.com/wp-content//nix/store/...plugin/path/some-file.js
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# Since hard linking directories is not allowed, copying is the next best thing.
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# copy additional plugin(s) and theme(s)
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${concatMapStringsSep "\n" (theme: "cp -r ${theme} $out/share/wordpress/wp-content/themes/${theme.name}") cfg.themes}
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${concatMapStringsSep "\n" (plugin: "cp -r ${plugin} $out/share/wordpress/wp-content/plugins/${plugin.name}") cfg.plugins}
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'';
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};
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wpConfig = hostName: cfg: pkgs.writeText "wp-config-${hostName}.php" ''
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<?php
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define('DB_NAME', '${cfg.database.name}');
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define('DB_HOST', '${cfg.database.host}:${if cfg.database.socket != null then cfg.database.socket else toString cfg.database.port}');
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define('DB_USER', '${cfg.database.user}');
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${optionalString (cfg.database.passwordFile != null) "define('DB_PASSWORD', file_get_contents('${cfg.database.passwordFile}'));"}
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define('DB_CHARSET', 'utf8');
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$table_prefix = '${cfg.database.tablePrefix}';
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require_once('${stateDir hostName}/secret-keys.php');
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# wordpress is installed onto a read-only file system
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define('DISALLOW_FILE_EDIT', true);
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define('AUTOMATIC_UPDATER_DISABLED', true);
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${cfg.extraConfig}
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if ( !defined('ABSPATH') )
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define('ABSPATH', dirname(__FILE__) . '/');
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require_once(ABSPATH . 'wp-settings.php');
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?>
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'';
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secretsVars = [ "AUTH_KEY" "SECURE_AUTH_KEY" "LOOGGED_IN_KEY" "NONCE_KEY" "AUTH_SALT" "SECURE_AUTH_SALT" "LOGGED_IN_SALT" "NONCE_SALT" ];
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secretsScript = hostStateDir: ''
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if ! test -e "${hostStateDir}/secret-keys.php"; then
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umask 0177
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echo "<?php" >> "${hostStateDir}/secret-keys.php"
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${concatMapStringsSep "\n" (var: ''
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echo "define('${var}', '`tr -dc a-zA-Z0-9 </dev/urandom | head -c 64`');" >> "${hostStateDir}/secret-keys.php"
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'') secretsVars}
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echo "?>" >> "${hostStateDir}/secret-keys.php"
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chmod 440 "${hostStateDir}/secret-keys.php"
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fi
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'';
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siteOpts = { lib, name, ... }:
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{
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options = {
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package = mkOption {
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type = types.package;
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default = pkgs.wordpress;
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description = "Which WordPress package to use.";
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};
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uploadsDir = mkOption {
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type = types.path;
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default = "/var/lib/wordpress/${name}/uploads";
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description = ''
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This directory is used for uploads of pictures. The directory passed here is automatically
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created and permissions adjusted as required.
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'';
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};
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plugins = mkOption {
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type = types.listOf types.path;
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default = [];
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description = ''
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List of path(s) to respective plugin(s) which are copied from the 'plugins' directory.
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<note><para>These plugins need to be packaged before use, see example.</para></note>
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'';
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example = ''
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# Wordpress plugin 'embed-pdf-viewer' installation example
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embedPdfViewerPlugin = pkgs.stdenv.mkDerivation {
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name = "embed-pdf-viewer-plugin";
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# Download the theme from the wordpress site
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src = pkgs.fetchurl {
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url = https://downloads.wordpress.org/plugin/embed-pdf-viewer.2.0.3.zip;
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sha256 = "1rhba5h5fjlhy8p05zf0p14c9iagfh96y91r36ni0rmk6y891lyd";
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};
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# We need unzip to build this package
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buildInputs = [ pkgs.unzip ];
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# Installing simply means copying all files to the output directory
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installPhase = "mkdir -p $out; cp -R * $out/";
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};
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And then pass this theme to the themes list like this:
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plugins = [ embedPdfViewerPlugin ];
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'';
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};
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themes = mkOption {
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type = types.listOf types.path;
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default = [];
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description = ''
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List of path(s) to respective theme(s) which are copied from the 'theme' directory.
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<note><para>These themes need to be packaged before use, see example.</para></note>
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'';
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example = ''
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# Let's package the responsive theme
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responsiveTheme = pkgs.stdenv.mkDerivation {
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name = "responsive-theme";
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# Download the theme from the wordpress site
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src = pkgs.fetchurl {
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url = https://downloads.wordpress.org/theme/responsive.3.14.zip;
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sha256 = "0rjwm811f4aa4q43r77zxlpklyb85q08f9c8ns2akcarrvj5ydx3";
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};
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# We need unzip to build this package
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buildInputs = [ pkgs.unzip ];
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# Installing simply means copying all files to the output directory
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installPhase = "mkdir -p $out; cp -R * $out/";
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};
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And then pass this theme to the themes list like this:
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themes = [ responsiveTheme ];
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'';
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};
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database = {
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host = mkOption {
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type = types.str;
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default = "localhost";
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description = "Database host address.";
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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 = "Database host port.";
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};
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name = mkOption {
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type = types.str;
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default = "wordpress";
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description = "Database name.";
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};
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user = mkOption {
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type = types.str;
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default = "wordpress";
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description = "Database user.";
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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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example = "/run/keys/wordpress-dbpassword";
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description = ''
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A file containing the password corresponding to
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<option>database.user</option>.
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'';
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};
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tablePrefix = mkOption {
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type = types.str;
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default = "wp_";
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description = ''
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The $table_prefix is the value placed in the front of your database tables.
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Change the value if you want to use something other than wp_ for your database
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prefix. Typically this is changed if you are installing multiple WordPress blogs
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in the same database.
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See <link xlink:href='https://codex.wordpress.org/Editing_wp-config.php#table_prefix'/>.
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'';
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};
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socket = mkOption {
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type = types.nullOr types.path;
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default = null;
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defaultText = "/run/mysqld/mysqld.sock";
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description = "Path to the unix socket file to use for authentication.";
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};
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createLocally = mkOption {
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type = types.bool;
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default = true;
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description = "Create the database and database user locally.";
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};
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};
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virtualHost = mkOption {
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type = types.submodule (import ../web-servers/apache-httpd/vhost-options.nix);
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example = literalExample ''
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{
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adminAddr = "webmaster@example.org";
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forceSSL = true;
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enableACME = true;
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}
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'';
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description = ''
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Apache configuration can be done by adapting <option>services.httpd.virtualHosts</option>.
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'';
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};
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poolConfig = mkOption {
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type = with types; attrsOf (oneOf [ str int bool ]);
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default = {
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"pm" = "dynamic";
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"pm.max_children" = 32;
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"pm.start_servers" = 2;
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"pm.min_spare_servers" = 2;
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"pm.max_spare_servers" = 4;
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"pm.max_requests" = 500;
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};
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description = ''
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Options for the WordPress PHP pool. See the documentation on <literal>php-fpm.conf</literal>
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for details on configuration directives.
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'';
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};
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Any additional text to be appended to the wp-config.php
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configuration file. This is a PHP script. For configuration
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settings, see <link xlink:href='https://codex.wordpress.org/Editing_wp-config.php'/>.
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'';
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example = ''
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define( 'AUTOSAVE_INTERVAL', 60 ); // Seconds
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'';
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};
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};
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config.virtualHost.hostName = mkDefault name;
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};
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in
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{
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# interface
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options = {
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services.wordpress = mkOption {
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type = types.attrsOf (types.submodule siteOpts);
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default = {};
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description = "Specification of one or more WordPress sites to serve via Apache.";
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};
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};
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# implementation
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config = mkIf (eachSite != {}) {
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assertions = mapAttrsToList (hostName: cfg:
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{ assertion = cfg.database.createLocally -> cfg.database.user == user;
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message = "services.wordpress.${hostName}.database.user must be ${user} if the database is to be automatically provisioned";
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}
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) eachSite;
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services.mysql = mkIf (any (v: v.database.createLocally) (attrValues eachSite)) {
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enable = true;
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package = mkDefault pkgs.mariadb;
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ensureDatabases = mapAttrsToList (hostName: cfg: cfg.database.name) eachSite;
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ensureUsers = mapAttrsToList (hostName: cfg:
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{ name = cfg.database.user;
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ensurePermissions = { "${cfg.database.name}.*" = "ALL PRIVILEGES"; };
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}
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) eachSite;
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};
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services.phpfpm.pools = mapAttrs' (hostName: cfg: (
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nameValuePair "wordpress-${hostName}" {
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inherit user group;
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settings = {
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"listen.owner" = config.services.httpd.user;
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"listen.group" = config.services.httpd.group;
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} // cfg.poolConfig;
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}
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)) eachSite;
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services.httpd = {
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enable = true;
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extraModules = [ "proxy_fcgi" ];
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virtualHosts = mapAttrs (hostName: cfg: mkMerge [ cfg.virtualHost {
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documentRoot = mkForce "${pkg hostName cfg}/share/wordpress";
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extraConfig = ''
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<Directory "${pkg hostName cfg}/share/wordpress">
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<FilesMatch "\.php$">
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<If "-f %{REQUEST_FILENAME}">
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SetHandler "proxy:unix:${config.services.phpfpm.pools."wordpress-${hostName}".socket}|fcgi://localhost/"
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</If>
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</FilesMatch>
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# standard wordpress .htaccess contents
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<IfModule mod_rewrite.c>
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RewriteEngine On
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RewriteBase /
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RewriteRule ^index\.php$ - [L]
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RewriteCond %{REQUEST_FILENAME} !-f
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RewriteCond %{REQUEST_FILENAME} !-d
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RewriteRule . /index.php [L]
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</IfModule>
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DirectoryIndex index.php
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Require all granted
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Options +FollowSymLinks
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</Directory>
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# https://wordpress.org/support/article/hardening-wordpress/#securing-wp-config-php
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<Files wp-config.php>
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Require all denied
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</Files>
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'';
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} ]) eachSite;
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};
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systemd.tmpfiles.rules = flatten (mapAttrsToList (hostName: cfg: [
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"d '${stateDir hostName}' 0750 ${user} ${group} - -"
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"d '${cfg.uploadsDir}' 0750 ${user} ${group} - -"
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"Z '${cfg.uploadsDir}' 0750 ${user} ${group} - -"
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]) eachSite);
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systemd.services = mkMerge [
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(mapAttrs' (hostName: cfg: (
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nameValuePair "wordpress-init-${hostName}" {
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wantedBy = [ "multi-user.target" ];
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before = [ "phpfpm-wordpress-${hostName}.service" ];
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after = optional cfg.database.createLocally "mysql.service";
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script = secretsScript (stateDir hostName);
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serviceConfig = {
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Type = "oneshot";
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User = user;
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Group = group;
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};
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})) eachSite)
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(optionalAttrs (any (v: v.database.createLocally) (attrValues eachSite)) {
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httpd.after = [ "mysql.service" ];
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})
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];
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users.users.${user} = {
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group = group;
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isSystemUser = true;
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};
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};
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}
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