From d27f033f97ab7a71e0a3af004d3e11bea9374676 Mon Sep 17 00:00:00 2001
From: Pierre Neidhardt <mail@ambrevar.xyz>
Date: Tue, 28 Apr 2020 10:45:18 +0200
Subject: [PATCH] gnu: sbcl-cl-cffi-gtk-pango: Link source to parent to reduce
 closure size.

* gnu/packages/lisp-xyz.scm (sbcl-cl-cffi-gtk-pango)[arguments]: Replace source
  folder with link to the same folder in the sbcl-cl-cffi-gtk-glib dependency.
---
 gnu/packages/lisp-xyz.scm | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/lisp-xyz.scm b/gnu/packages/lisp-xyz.scm
index e938bd6aa2..b2b5e006a6 100644
--- a/gnu/packages/lisp-xyz.scm
+++ b/gnu/packages/lisp-xyz.scm
@@ -3015,7 +3015,20 @@ (define-public sbcl-cl-cffi-gtk-pango
              (substitute* "pango/pango.init.lisp"
                (("libpango" all)
                 (string-append
-                 (assoc-ref inputs "pango") "/lib/" all))))))))))
+                 (assoc-ref inputs "pango") "/lib/" all)))))
+         (add-after 'install 'link-source
+           ;; Since source is particularly heavy (16MiB+), let's reuse it
+           ;; across the different components of cl-ffi-gtk.
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let ((glib-source (string-append (assoc-ref inputs "cl-cffi-gtk-glib")
+                                               "/share/common-lisp/sbcl-source/"
+                                               "cl-cffi-gtk-glib"))
+                   (out-source (string-append (assoc-ref outputs "out")
+                                              "/share/common-lisp/sbcl-source/"
+                                              "cl-cffi-gtk-pango")))
+               (delete-file-recursively out-source)
+               (symlink glib-source out-source)
+               #t))))))))
 
 (define-public sbcl-cl-cffi-gtk-gdk-pixbuf
   (package