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authorLudovic Courtès <ludo@gnu.org>2015-04-06 20:02:22 +0200
committerLudovic Courtès <ludo@gnu.org>2015-04-06 20:02:29 +0200
commit65d428d8f4bd6bf05dde428ce51a3ce04bd3aad3 (patch)
treea9624f13b766da91c01d1b4f5653047edc5113bc
parentd507b277ebe69d218d2f2106bdeef8c082c04dbe (diff)
guix package: Move generation deletion to its own procedure.
* guix/scripts/package.scm (delete-matching-generations): New procedure, with code formerly found... (guix-package)[process-actions]: ... here. Use it. Remove 'current-generation-number'.
-rw-r--r--guix/scripts/package.scm56
1 files changed, 29 insertions, 27 deletions
diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm
index 3cc7ae760f..7074243ed9 100644
--- a/guix/scripts/package.scm
+++ b/guix/scripts/package.scm
@@ -232,6 +232,34 @@ DURATION-RELATION with the current time."
filter-by-duration)
(else #f)))
+(define (delete-matching-generations store profile pattern)
+ "Delete from PROFILE all the generations matching PATTERN. PATTERN must be
+a string denoting a set of generations: the empty list means \"all generations
+but the current one\", a number designates a generation, and other patterns
+denote ranges as interpreted by 'matching-derivations'."
+ (let ((current (generation-number profile)))
+ (cond ((not (file-exists? profile)) ; XXX: race condition
+ (raise (condition (&profile-not-found-error
+ (profile profile)))))
+ ((string-null? pattern)
+ (delete-generations (%store) profile
+ (delv current (profile-generations profile))))
+ ;; Do not delete the zeroth generation.
+ ((equal? 0 (string->number pattern))
+ (exit 0))
+
+ ;; If PATTERN is a duration, match generations that are
+ ;; older than the specified duration.
+ ((matching-generations pattern profile
+ #:duration-relation >)
+ =>
+ (lambda (numbers)
+ (if (null-list? numbers)
+ (exit 1)
+ (delete-generations (%store) profile numbers))))
+ (else
+ (leave (_ "invalid syntax: ~a~%") pattern)))))
+
;;;
;;; Package specifications.
@@ -751,9 +779,6 @@ more information.~%"))
(define dry-run? (assoc-ref opts 'dry-run?))
(define profile (assoc-ref opts 'profile))
- (define current-generation-number
- (generation-number profile))
-
;; First roll back if asked to.
(cond ((and (assoc-ref opts 'roll-back?)
(not dry-run?))
@@ -782,30 +807,7 @@ more information.~%"))
(for-each
(match-lambda
(('delete-generations . pattern)
- (cond ((not (file-exists? profile)) ; XXX: race condition
- (raise (condition (&profile-not-found-error
- (profile profile)))))
- ((string-null? pattern)
- (delete-generations
- (%store) profile
- (delete current-generation-number
- (profile-generations profile))))
- ;; Do not delete the zeroth generation.
- ((equal? 0 (string->number pattern))
- (exit 0))
-
- ;; If PATTERN is a duration, match generations that are
- ;; older than the specified duration.
- ((matching-generations pattern profile
- #:duration-relation >)
- =>
- (lambda (numbers)
- (if (null-list? numbers)
- (exit 1)
- (delete-generations (%store) profile numbers))))
- (else
- (leave (_ "invalid syntax: ~a~%")
- pattern)))
+ (delete-matching-generations (%store) profile pattern)
(process-actions
(alist-delete 'delete-generations opts)))