fish: disable codesigning

We don't have access to the codesign binary.

pkgs/shells/fish/default.nix

@@ -110,6 +110,10 @@ let
       sha256 = "1f12c56v7n4s0f9mi9xinviwj6kpwlcjwaig1d4vsk5wlgp7ip07";
     };
 
+    # We don't have access to the codesign executable, so we patch this out.
+    # For more information, see: https://github.com/fish-shell/fish-shell/issues/6952
+    patches = lib.optional stdenv.isDarwin ./dont-codesign-on-mac.diff;
+
     nativeBuildInputs = [
       cmake
     ];

pkgs/shells/fish/dont-codesign-on-mac.diff

@@ -0,0 +1,12 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 7d220a032..786b60e6e 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -183,7 +183,6 @@ ENDFUNCTION(CODESIGN_ON_MAC target)
+ # Define a function to link dependencies.
+ FUNCTION(FISH_LINK_DEPS_AND_SIGN target)
+   TARGET_LINK_LIBRARIES(${target} fishlib)
+-  CODESIGN_ON_MAC(${target})
+ ENDFUNCTION(FISH_LINK_DEPS_AND_SIGN)
+ 
+ # Define libfish.a.