Revert "apparmor: fix and improve the service"

This reverts commit fb6d63f3fd.

I really hope this finally fixes #99236: evaluation on Hydra.
This time I really did check basically the same commit on Hydra:
https://hydra.nixos.org/eval/1618011

Right now I don't have energy to find what exactly is wrong in the
commit, and it doesn't seem important in comparison to nixos-unstable
channel being stuck on a commit over one week old.

nixos/modules/services/torrent/transmission.nix

@@ -5,7 +5,7 @@ with lib;
 let
   cfg = config.services.transmission;
   inherit (config.environment) etc;
-  apparmor = config.security.apparmor;
+  apparmor = config.security.apparmor.enable;
   rootDir = "/run/transmission";
   homeDir = "/var/lib/transmission";
   settingsDir = ".config/transmission-daemon";
@@ -184,8 +184,8 @@ in
 
     systemd.services.transmission = {
       description = "Transmission BitTorrent Service";
-      after = [ "network.target" ] ++ optional apparmor.enable "apparmor.service";
-      requires = optional apparmor.enable "apparmor.service";
+      after = [ "network.target" ] ++ optional apparmor "apparmor.service";
+      requires = optional apparmor "apparmor.service";
       wantedBy = [ "multi-user.target" ];
       environment.CURL_CA_BUNDLE = etc."ssl/certs/ca-certificates.crt".source;
 
@@ -357,21 +357,61 @@ in
       })
     ];
 
-    security.apparmor.policies."bin.transmission-daemon".profile = ''
+    security.apparmor.profiles = mkIf apparmor [
+      (pkgs.writeText "apparmor-transmission-daemon" ''
         include <tunables/global>
+
         ${pkgs.transmission}/bin/transmission-daemon {
           include <abstractions/base>
           include <abstractions/nameservice>
-          include <abstractions/ssl_certs>
-          include "${pkgs.apparmorRulesFromClosure {} [pkgs.transmission]}"
-          include <local/bin.transmission-daemon>
+
+          # NOTE: https://github.com/NixOS/nixpkgs/pull/93457
+          # will remove the need for these by fixing <abstractions/base>
+          r ${etc."hosts".source},
+          r /etc/ld-nix.so.preload,
+          ${lib.optionalString (builtins.hasAttr "ld-nix.so.preload" etc) ''
+            r ${etc."ld-nix.so.preload".source},
+            ${concatMapStrings (p: optionalString (p != "") ("mr ${p},\n"))
+              (splitString "\n" config.environment.etc."ld-nix.so.preload".text)}
+          ''}
+          r ${etc."ssl/certs/ca-certificates.crt".source},
+          r ${pkgs.tzdata}/share/zoneinfo/**,
+          r ${pkgs.stdenv.cc.libc}/share/i18n/**,
+          r ${pkgs.stdenv.cc.libc}/share/locale/**,
+
+          mr ${getLib pkgs.stdenv.cc.cc}/lib/*.so*,
+          mr ${getLib pkgs.stdenv.cc.libc}/lib/*.so*,
+          mr ${getLib pkgs.attr}/lib/libattr*.so*,
+          mr ${getLib pkgs.c-ares}/lib/libcares*.so*,
+          mr ${getLib pkgs.curl}/lib/libcurl*.so*,
+          mr ${getLib pkgs.keyutils}/lib/libkeyutils*.so*,
+          mr ${getLib pkgs.libcap}/lib/libcap*.so*,
+          mr ${getLib pkgs.libevent}/lib/libevent*.so*,
+          mr ${getLib pkgs.libgcrypt}/lib/libgcrypt*.so*,
+          mr ${getLib pkgs.libgpgerror}/lib/libgpg-error*.so*,
+          mr ${getLib pkgs.libkrb5}/lib/lib*.so*,
+          mr ${getLib pkgs.libssh2}/lib/libssh2*.so*,
+          mr ${getLib pkgs.lz4}/lib/liblz4*.so*,
+          mr ${getLib pkgs.nghttp2}/lib/libnghttp2*.so*,
+          mr ${getLib pkgs.openssl}/lib/libcrypto*.so*,
+          mr ${getLib pkgs.openssl}/lib/libssl*.so*,
+          mr ${getLib pkgs.systemd}/lib/libsystemd*.so*,
+          mr ${getLib pkgs.utillinuxMinimal.out}/lib/libblkid.so*,
+          mr ${getLib pkgs.utillinuxMinimal.out}/lib/libmount.so*,
+          mr ${getLib pkgs.utillinuxMinimal.out}/lib/libuuid.so*,
+          mr ${getLib pkgs.xz}/lib/liblzma*.so*,
+          mr ${getLib pkgs.zlib}/lib/libz*.so*,
 
           r @{PROC}/sys/kernel/random/uuid,
           r @{PROC}/sys/vm/overcommit_memory,
-          r @{PROC}/@{pid}/environ,
+          # @{pid} is not a kernel variable yet but a regexp
+          #r @{PROC}/@{pid}/environ,
           r @{PROC}/@{pid}/mounts,
           rwk /tmp/tr_session_id_*,
+
+          r ${pkgs.openssl.out}/etc/**,
           r ${config.systemd.services.transmission.environment.CURL_CA_BUNDLE},
+          r ${pkgs.transmission}/share/transmission/**,
 
           owner rw ${cfg.home}/${settingsDir}/**,
           rw ${cfg.settings.download-dir}/**,
@@ -399,9 +439,12 @@ in
             # https://gitlab.com/apparmor/apparmor/-/wikis/AppArmorStacking#seccomp-and-no_new_privs
             px ${cfg.settings.script-torrent-done-filename} -> &@{dirs},
           ''}
+
+          # FIXME: enable customizing using https://github.com/NixOS/nixpkgs/pull/93457
+          # include <local/transmission-daemon>
         }
-    '';
-    security.apparmor.includes."local/bin.transmission-daemon" = "";
+      '')
+    ];
   };
 
   meta.maintainers = with lib.maintainers; [ julm ];