jetbrains-plugins: fix copilot plugin (#424497)

pkgs/applications/editors/jetbrains/plugins/specialPlugins.nix

@@ -56,6 +56,20 @@
         .${stdenv.hostPlatform.uname.processor} or ""
       }/copilot-language-server'
       orig_size=$(stat --printf=%s $agent)
+
+      find_payload_offset() {
+        grep -aobUam1 -f <(printf '\x1f\x8b\x08\x00') "$agent" | cut -d: -f1
+      }
+
+      # Helper: find the offset of the prelude by searching for function string start
+      find_prelude_offset() {
+        local prelude_string='(function(process, require, console, EXECPATH_FD, PAYLOAD_POSITION, PAYLOAD_SIZE) {'
+        grep -obUa -- "$prelude_string" "$agent" | cut -d: -f1
+      }
+
+      before_payload_position="$(find_payload_offset)"
+      before_prelude_position="$(find_prelude_offset)"
+
       patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" $agent
       patchelf --set-rpath ${
         lib.makeLibraryPath [
@@ -77,8 +91,19 @@
         value=$(expr $shift_by + $value)
         echo -n $value | dd of=$agent bs=1 seek=$location conv=notrunc
       }
-      fix_offset PAYLOAD_POSITION
-      fix_offset PRELUDE_POSITION
+
+      after_payload_position="$(find_payload_offset)"
+      after_prelude_position="$(find_prelude_offset)"
+
+      if [ "${stdenv.hostPlatform.system}" == "aarch64-linux" ]
+      then
+        fix_offset PAYLOAD_POSITION
+        fix_offset PRELUDE_POSITION
+      else
+        # There are hardcoded positions in the binary, then it replaces the placeholders by himself
+        sed -i -e "s/$before_payload_position/$after_payload_position/g" "$agent"
+        sed -i -e "s/$before_prelude_position/$after_prelude_position/g" "$agent"
+      fi
     '';
   };
   "22407" = {

pkgs/applications/editors/jetbrains/plugins/tests.nix

@@ -11,7 +11,6 @@ let
 
   # Known broken plugins, PLEASE remove entries here whenever possible.
   broken-plugins = [
-    "github-copilot" # GitHub Copilot: https://github.com/NixOS/nixpkgs/issues/400317
   ];
 
   ides =