@@ 1,6 1,6 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
-;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
+;;; Copyright © 2014, 2015, 2017 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2015 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2016 Alex Kost <alezost@gmail.com>
;;;
@@ 105,6 105,7 @@
package-cross-derivation
package-output
package-grafts
+ package/inherit
transitive-input-references
@@ 789,6 790,16 @@ package and returns its new name after rewrite."
(package-mapping rewrite (cut assq <> replacements)))
+(define-syntax-rule (package/inherit p overrides ...)
+ "Like (package (inherit P) OVERRIDES ...), except that the same
+transformation is done to the package replacement, if any. P must be a bare
+identifier, and will be bound to either P or its replacement when evaluating
+OVERRIDES."
+ (let loop ((p p))
+ (package (inherit p)
+ overrides ...
+ (replacement (and=> (package-replacement p) loop)))))
+
;;;
;;; Package derivations.