diff options
Diffstat (limited to 'guix/derivations.scm')
| -rw-r--r-- | guix/derivations.scm | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/guix/derivations.scm b/guix/derivations.scm index 23d058e832..92d50503ce 100644 --- a/guix/derivations.scm +++ b/guix/derivations.scm @@ -71,6 +71,7 @@ derivation-input-derivation derivation-input-sub-derivations derivation-input-output-paths + derivation-input-output-path valid-derivation-input? &derivation-error @@ -221,6 +222,13 @@ download with a fixed hash (aka. `fetchurl')." (map (cut derivation->output-path drv <>) sub-drvs)))) +(define (derivation-input-output-path input) + "Return the output file name of INPUT. If INPUT has more than one outputs, +an error is raised." + (match input + (($ <derivation-input> drv (output)) + (derivation->output-path drv output)))) + (define (valid-derivation-input? store input) "Return true if INPUT is valid--i.e., if all the outputs it requests are in the store." |