From 1cd3b98c3a7e93c95190e4d3fb76cca68cb9e049 Mon Sep 17 00:00:00 2001
From: Aaron Andersen <aaron@fosslib.net>
Date: Fri, 5 Jul 2019 22:04:56 -0400
Subject: [PATCH] nixos/tt-rss: remove deprecated usage of
 PermissionsStartOnly, specify a group to run service as, and fix local pgsql
 database creation

---
 nixos/modules/services/web-apps/tt-rss.nix | 62 ++++++++++++----------
 1 file changed, 35 insertions(+), 27 deletions(-)

diff --git a/nixos/modules/services/web-apps/tt-rss.nix b/nixos/modules/services/web-apps/tt-rss.nix
index b882f6c2ae7e..1bd9de93735d 100644
--- a/nixos/modules/services/web-apps/tt-rss.nix
+++ b/nixos/modules/services/web-apps/tt-rss.nix
@@ -16,6 +16,9 @@ let
 
   poolName = "tt-rss";
 
+  mysqlLocal = cfg.database.createLocally && cfg.database.type == "mysql";
+  pgsqlLocal = cfg.database.createLocally && cfg.database.type == "pgsql";
+
   tt-rss-config = pkgs.writeText "config.php" ''
     <?php
 
@@ -200,6 +203,12 @@ let
             and 3306 for pgsql and mysql respectively).
           '';
         };
+
+        createLocally = mkOption {
+          type = types.bool;
+          default = true;
+          description = "Create the database and database user locally.";
+        };
       };
 
       auth = {
@@ -551,9 +560,13 @@ let
       };
     };
 
-    systemd.services.tt-rss = let
-      dbService = if cfg.database.type == "pgsql" then "postgresql.service" else "mysql.service";
-    in {
+    systemd.tmpfiles.rules = [
+      "d '${cfg.root}' 0755 ${cfg.user} tt_rss - -"
+      "Z '${cfg.root}' 0755 ${cfg.user} tt_rss - -"
+    ];
+
+    systemd.services.tt-rss =
+      {
 
         description = "Tiny Tiny RSS feeds update daemon";
 
@@ -562,14 +575,14 @@ let
               if cfg.database.type == "pgsql" then ''
                   ${optionalString (cfg.database.password != null) "PGPASSWORD=${cfg.database.password}"} \
                   ${optionalString (cfg.database.passwordFile != null) "PGPASSWORD=$(cat ${cfg.database.passwordFile})"} \
-                  ${pkgs.sudo}/bin/sudo -u ${cfg.user} ${config.services.postgresql.package}/bin/psql \
+                  ${config.services.postgresql.package}/bin/psql \
                     -U ${cfg.database.user} \
                     ${optionalString (cfg.database.host != null) "-h ${cfg.database.host} --port ${toString dbPort}"} \
                     -c '${e}' \
                     ${cfg.database.name}''
 
               else if cfg.database.type == "mysql" then ''
-                  echo '${e}' | ${pkgs.sudo}/bin/sudo -u ${cfg.user} ${config.services.mysql.package}/bin/mysql \
+                  echo '${e}' | ${config.services.mysql.package}/bin/mysql \
                     -u ${cfg.database.user} \
                     ${optionalString (cfg.database.password != null) "-p${cfg.database.password}"} \
                     ${optionalString (cfg.database.host != null) "-h ${cfg.database.host} -P ${toString dbPort}"} \
@@ -579,7 +592,6 @@ let
 
         in ''
           rm -rf "${cfg.root}/*"
-          mkdir -m 755 -p "${cfg.root}"
           cp -r "${pkgs.tt-rss}/"* "${cfg.root}"
           ${optionalString (cfg.pluginPackages != []) ''
             for plugin in ${concatStringsSep " " cfg.pluginPackages}; do
@@ -592,19 +604,10 @@ let
             done
           ''}
           ln -sf "${tt-rss-config}" "${cfg.root}/config.php"
-          chown -R "${cfg.user}" "${cfg.root}"
           chmod -R 755 "${cfg.root}"
         ''
 
         + (optionalString (cfg.database.type == "pgsql") ''
-          ${optionalString (cfg.database.host == null && cfg.database.password == null) ''
-            if ! [ -e ${cfg.root}/.db-created ]; then
-              ${pkgs.sudo}/bin/sudo -u ${config.services.postgresql.superUser} ${config.services.postgresql.package}/bin/createuser ${cfg.database.user}
-              ${pkgs.sudo}/bin/sudo -u ${config.services.postgresql.superUser} ${config.services.postgresql.package}/bin/createdb -O ${cfg.database.user} ${cfg.database.name}
-              touch ${cfg.root}/.db-created
-            fi
-          ''}
-
           exists=$(${callSql "select count(*) > 0 from pg_tables where tableowner = user"} \
           | tail -n+3 | head -n-2 | sed -e 's/[ \n\t]*//')
 
@@ -628,18 +631,18 @@ let
 
         serviceConfig = {
           User = "${cfg.user}";
+          Group = "tt_rss";
           ExecStart = "${pkgs.php}/bin/php ${cfg.root}/update.php --daemon";
           StandardOutput = "syslog";
           StandardError = "syslog";
-          PermissionsStartOnly = true;
         };
 
         wantedBy = [ "multi-user.target" ];
-        requires = ["${dbService}"];
-        after = ["network.target" "${dbService}"];
+        requires = optional mysqlLocal "mysql.service" ++ optional pgsqlLocal "postgresql.service";
+        after = [ "network.target" ] ++ optional mysqlLocal "mysql.service" ++ optional pgsqlLocal "postgresql.service";
     };
 
-    services.mysql = optionalAttrs (cfg.database.type == "mysql") {
+    services.mysql = mkIf mysqlLocal {
       enable = true;
       package = mkDefault pkgs.mysql;
       ensureDatabases = [ cfg.database.name ];
@@ -653,17 +656,22 @@ let
       ];
     };
 
-    services.postgresql = optionalAttrs (cfg.database.type == "pgsql") {
+    services.postgresql = mkIf pgsqlLocal {
       enable = mkDefault true;
+      ensureDatabases = [ cfg.database.name ];
+      ensureUsers = [
+        { name = cfg.user;
+          ensurePermissions = { "DATABASE ${cfg.database.name}" = "ALL PRIVILEGES"; };
+        }
+      ];
     };
 
-    users = optionalAttrs (cfg.user == "tt_rss") {
-      users.tt_rss = {
-        description = "tt-rss service user";
-        isSystemUser = true;
-        group = "tt_rss";
-      };
-      groups.tt_rss = {};
+    users.users.tt_rss = optionalAttrs (cfg.user == "tt_rss") {
+      description = "tt-rss service user";
+      isSystemUser = true;
+      group = "tt_rss";
     };
+
+    users.groups.tt_rss = {};
   };
 }