From 1f72e287eb7411621d2227858372ede358a1d8fc Mon Sep 17 00:00:00 2001
From: ChUrl <christoph.urlacher@protonmail.com>
Date: Mon, 15 Aug 2022 12:31:08 +0200
Subject: [PATCH] dconf-editor xdg_data_dirs overlay

---
 overlays/dconf-editor.nix | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 overlays/dconf-editor.nix

diff --git a/overlays/dconf-editor.nix b/overlays/dconf-editor.nix
new file mode 100644
index 00000000..d7804789
--- /dev/null
+++ b/overlays/dconf-editor.nix
@@ -0,0 +1,28 @@
+# We need to wrap the dconf-editor to use the correct XDG_DATA_DIRS
+# By default XDG_DATA_DIRS on NixOS contains paths to the gsettings-schemas like
+# /nix/store/z3gxkwakzgiswvakfrpbirhpcach509j-mutter-42.3/share/gsettings-schemas/mutter-42.3
+# but this is the wrong path for dconf-editor to find the schema, correct one would be
+# /nix/store/z3gxkwakzgiswvakfrpbirhpcach509j-mutter-42.3/share/gsettings-schemas/mutter-42.3/glib-2.0/schemas
+
+# override derivation attributes
+prev.gnome.dconf-editor.overrideAttrs (oldAttrs: {
+  # add `makeWrapper` to existing dependencies
+  buildInputs = oldAttrs.buildInputs ++ [ final.makeWrapper ];
+
+  # wrap the binary in a script where the appropriate env var is set
+  postInstall = oldAttrs.postInstall or "" + ''
+    schemas=""
+    for p in $NIX_PROFILES; do
+        if [[ -d "$p" ]]; then
+            for d in $(nix-store --query --references "$p"); do
+                schemas_dir=$(echo "$d"/share/gsettings-schemas/*/glib-2.0/schemas)
+                if [[ -d "$schemas_dir" ]]; then
+                    schemas="$schemas''${schemas:+:}$schemas_dir"
+                fi
+            done
+        fi
+    done
+
+    wrapProgram "$out/bin/dconf-editor" --set XDG_DATA_DIRS $schemas
+  '';
+})