gobjectIntrospection: use absolute path for cairo GIR

Cairo does not provide its own GObject bindinds so they are provided
by gobject-introspection package. Unfortunately, this means that if we
want to use the absolute path, we need gi to depend on cairo, which
increases the closure size from 41M to 56M. We will probably want
to split the typelib into a separate output.

Closes: #34080

2 files changed, 23 insertions, 5 deletions

diff --git a/pkgs/development/libraries/gobject-introspection/absolute_gir_path.patch b/pkgs/development/libraries/gobject-introspection/absolute_gir_path.patch
new file mode 100644
index 000000000000..f7e1bedd3e18
--- /dev/null
+++ b/pkgs/development/libraries/gobject-introspection/absolute_gir_path.patch
@@ -0,0 +1,11 @@
+--- a/gir/cairo-1.0.gir.in
++++ b/gir/cairo-1.0.gir.in
+@@ -5,7 +5,7 @@
+             xmlns:glib="http://www.gtk.org/introspection/glib/1.0">
+   <package name="%CAIRO_GIR_PACKAGE%"/>
+   <namespace name="cairo" version="1.0"
+-	     shared-library="%CAIRO_SHARED_LIBRARY%"
++	     shared-library="@cairoLib@/%CAIRO_SHARED_LIBRARY%"
+ 	     c:identifier-prefixes="cairo"
+ 	     c:symbol-prefixes="cairo">
+     <record name="Context" c:type="cairo_t" foreign="1"
diff --git a/pkgs/development/libraries/gobject-introspection/default.nix b/pkgs/development/libraries/gobject-introspection/default.nix
index f629b9a8a3c3..870f77686b3e 100644
--- a/pkgs/development/libraries/gobject-introspection/default.nix
+++ b/pkgs/development/libraries/gobject-introspection/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchurl, glib, flex, bison, pkgconfig, libffi, python
-, libintlOrEmpty, cctools
+, libintlOrEmpty, cctools, cairo
 , substituteAll, nixStoreDir ? builtins.storeDir
 }:
 # now that gobjectIntrospection creates large .gir files (eg gtk3 case)
@@ -38,10 +38,17 @@ stdenv.mkDerivation rec {
 
   setupHook = ./setup-hook.sh;
 
-  patches = stdenv.lib.singleton (substituteAll {
-    src = ./absolute_shlib_path.patch;
-    inherit nixStoreDir;
-  });
+  patches = [
+    (substituteAll {
+      src = ./absolute_shlib_path.patch;
+      inherit nixStoreDir;
+    })
+    # https://github.com/NixOS/nixpkgs/issues/34080
+    (substituteAll {
+      src = ./absolute_gir_path.patch;
+      cairoLib = "${getLib cairo}/lib";
+    })
+  ];
 
   meta = with stdenv.lib; {
     description = "A middleware layer between C libraries and language bindings";