diff options
Diffstat (limited to 'guix/scripts/package.scm')
| -rw-r--r-- | guix/scripts/package.scm | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm index ed1e72c4ae..786502705e 100644 --- a/guix/scripts/package.scm +++ b/guix/scripts/package.scm @@ -214,6 +214,15 @@ all of PACKAGES, a list of name/version/output/path/deps tuples." (compose string->number (cut match:substring <> 1))) 0)) +(define (link-to-empty-profile generation) + "Link GENERATION, a string, to the empty profile." + (let* ((drv (profile-derivation (%store) '())) + (prof (derivation->output-path drv "out"))) + (when (not (build-derivations (%store) (list drv))) + (leave (_ "failed to build the empty profile~%"))) + + (switch-symlinks generation prof))) + (define (roll-back profile) "Roll back to the previous generation of PROFILE." (let* ((number (generation-number profile)) @@ -236,13 +245,8 @@ all of PACKAGES, a list of name/version/output/path/deps tuples." (_ "nothing to do: already at the empty profile~%"))) ((or (zero? previous-number) ; going to emptiness (not (file-exists? previous-generation))) - (let* ((drv (profile-derivation (%store) '())) - (prof (derivation->output-path drv "out"))) - (when (not (build-derivations (%store) (list drv))) - (leave (_ "failed to build the empty profile~%"))) - - (switch-symlinks previous-generation prof) - (switch-link))) + (link-to-empty-profile previous-generation) + (switch-link)) (else (switch-link))))) ; anything else (define (generation-time profile number) |