nixos/writefreely: add support for email smtp password + minor fixes (#458481)

nixos/modules/services/web-apps/writefreely.nix

@@ -19,7 +19,7 @@ let
     optionalString
     ;
 
-  inherit (pkgs) sqlite;
+  inherit (pkgs) sqlite openssl;
 
   format = pkgs.formats.ini {
     mkKeyValue =
@@ -72,6 +72,10 @@ let
       pages_parent_dir = cfg.settings.server.pages_parent_dir or cfg.package.src;
       keys_parent_dir = cfg.settings.server.keys_parent_dir or cfg.stateDir;
     };
+
+    email = cfg.settings.email or { } // {
+      smtp_password = "#smtppass#";
+    };
   };
 
   configFile = format.generate "config.ini" settings;
@@ -104,9 +108,15 @@ let
     db_pass=${
       optionalString (cfg.database.passwordFile != null) "$(head -n1 ${cfg.database.passwordFile})"
     }
+    smtp_pass=${
+      optionalString (
+        cfg.email.smtpPasswordFile != null
+      ) ''$(printf '%s\n' "$(head -n1 ${cfg.email.smtpPasswordFile})" | sed -e 's/[\/&]/\\&/g')''
+    }
 
     cp -f ${configFile} '${cfg.stateDir}/config.ini'
     sed -e "s,#dbpass#,$db_pass,g" -i '${cfg.stateDir}/config.ini'
+    sed -e "s,#smtppass#,$smtp_pass,g" -i '${cfg.stateDir}/config.ini'
     chmod 440 '${cfg.stateDir}/config.ini'
 
     ${text}
@@ -123,7 +133,7 @@ let
           --silent \
           --raw \
           --skip-column-names \
-          --execute "$1" \
+          --execute "$1"
         )
 
         echo $result
@@ -291,6 +301,14 @@ in
       };
     };
 
+    email = {
+      smtpPasswordFile = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = "The file to load the password for the smtp email server.";
+      };
+    };
+
     nginx = {
       enable = mkOption {
         type = types.bool;
@@ -356,6 +374,8 @@ in
       ++ optional isMysqlLocal "mysql.service";
       wantedBy = [ "multi-user.target" ];
 
+      path = [ openssl ];
+
       serviceConfig = {
         Type = "simple";
         User = cfg.user;