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-rw-r--r--guix/packages.scm13
1 files changed, 13 insertions, 0 deletions
diff --git a/guix/packages.scm b/guix/packages.scm
index b372f03818..51984baa3b 100644
--- a/guix/packages.scm
+++ b/guix/packages.scm
@@ -20,10 +20,12 @@
#:use-module (guix utils)
#:use-module (guix store)
#:use-module (guix base32)
+ #:use-module (guix derivations)
#:use-module (guix build-system)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9 gnu)
+ #:use-module (srfi srfi-11)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:re-export (%current-system)
@@ -62,6 +64,7 @@
package-source-derivation
package-derivation
package-cross-derivation
+ package-output
&package-error
package-error?
@@ -305,3 +308,13 @@ PACKAGE for SYSTEM."
(define* (package-cross-derivation store package)
;; TODO
#f)
+
+(define* (package-output store package output
+ #:optional (system (%current-system)))
+ "Return the output path of PACKAGE's OUTPUT for SYSTEM---where OUTPUT is the
+symbolic output name, such as \"out\". Note that this procedure calls
+`package-derivation', which is costly."
+ (let-values (((_ drv)
+ (package-derivation store package system)))
+ (derivation-output-path
+ (assoc-ref (derivation-outputs drv) output))))