@@ 714,6 714,16 @@ or months by passing an integer along with the first letter of the
duration, e.g., @code{--list-generations=20d}.
@end itemize
+@item --delete-generations[=@var{pattern}]
+@itemx -d [@var{pattern}]
+Delete all generations except the current one. Note that the zeroth
+generation is never deleted.
+
+This command accepts the same patterns as @option{--list-generations}.
+When @var{pattern} is specified, delete the matching generations. If
+the current generation matches, it is deleted atomically, i.e., by
+switching to the previous available generation.
+
@end table
@node Packages with Multiple Outputs
@@ 223,6 223,16 @@ all of PACKAGES, a list of name/version/output/path/deps tuples."
(switch-symlinks generation prof)))
+(define (switch-to-previous-generation profile)
+ "Atomically switch PROFILE to the previous generation."
+ (let* ((number (generation-number profile))
+ (previous-number (previous-generation-number profile number))
+ (previous-generation (format #f "~a-~a-link"
+ profile previous-number)))
+ (format #t (_ "switching from generation ~a to ~a~%")
+ number previous-number)
+ (switch-symlinks profile previous-generation)))
+
(define (roll-back profile)
"Roll back to the previous generation of PROFILE."
(let* ((number (generation-number profile))
@@ 230,24 240,18 @@ all of PACKAGES, a list of name/version/output/path/deps tuples."
(previous-generation (format #f "~a-~a-link"
profile previous-number))
(manifest (string-append previous-generation "/manifest")))
-
- (define (switch-link)
- ;; Atomically switch PROFILE to the previous generation.
- (format #t (_ "switching from generation ~a to ~a~%")
- number previous-number)
- (switch-symlinks profile previous-generation))
-
- (cond ((not (file-exists? profile)) ; invalid profile
- (leave (_ "profile `~a' does not exist~%")
+ (cond ((not (file-exists? profile)) ; invalid profile
+ (leave (_ "profile '~a' does not exist~%")
profile))
- ((zero? number) ; empty profile
+ ((zero? number) ; empty profile
(format (current-error-port)
(_ "nothing to do: already at the empty profile~%")))
- ((or (zero? previous-number) ; going to emptiness
+ ((or (zero? previous-number) ; going to emptiness
(not (file-exists? previous-generation)))
(link-to-empty-profile previous-generation)
- (switch-link))
- (else (switch-link))))) ; anything else
+ (switch-to-previous-generation profile))
+ (else
+ (switch-to-previous-generation profile))))) ; anything else
(define (generation-time profile number)
"Return the creation time of a generation in the UTC format."
@@ 515,6 519,9 @@ Install, remove, or upgrade PACKAGES in a single transaction.\n"))
(display (_ "
-l, --list-generations[=PATTERN]
list generations matching PATTERN"))
+ (display (_ "
+ -d, --delete-generations[=PATTERN]
+ delete generations matching PATTERN"))
(newline)
(display (_ "
-p, --profile=PROFILE use PROFILE instead of the user's default profile"))
@@ 578,6 585,10 @@ Install, remove, or upgrade PACKAGES in a single transaction.\n"))
(lambda (opt name arg result)
(cons `(query list-generations ,(or arg ""))
result)))
+ (option '(#\d "delete-generations") #f #t
+ (lambda (opt name arg result)
+ (alist-cons 'delete-generations (or arg "")
+ result)))
(option '("search-paths") #f #f
(lambda (opt name arg result)
(cons `(query search-paths) result)))
@@ 828,85 839,146 @@ more information.~%"))
install))))
(_ #f)))
+ (define current-generation-number
+ (generation-number profile))
+
+ (define (display-and-delete number)
+ (let ((generation (format #f "~a-~a-link" profile number)))
+ (unless (zero? number)
+ (format #t (_ "deleting ~a~%") generation)
+ (delete-file generation))))
+
+ (define (delete-generation number)
+ (let* ((previous-number (previous-generation-number profile number))
+ (previous-generation (format #f "~a-~a-link"
+ profile previous-number)))
+ (cond ((zero? number)) ; do not delete generation 0
+ ((and (= number current-generation-number)
+ (not (file-exists? previous-generation)))
+ (link-to-empty-profile previous-generation)
+ (switch-to-previous-generation profile)
+ (display-and-delete number))
+ ((= number current-generation-number)
+ (roll-back profile)
+ (display-and-delete number))
+ (else
+ (display-and-delete number)))))
+
;; First roll back if asked to.
- (if (and (assoc-ref opts 'roll-back?) (not dry-run?))
- (begin
- (roll-back profile)
- (process-actions (alist-delete 'roll-back? opts)))
- (let* ((installed (manifest-packages (profile-manifest profile)))
- (upgrade-regexps (filter-map (match-lambda
- (('upgrade . regexp)
- (make-regexp (or regexp "")))
- (_ #f))
- opts))
- (upgrade (if (null? upgrade-regexps)
- '()
- (let ((newest (find-newest-available-packages)))
- (filter-map (match-lambda
- ((name version output path _)
- (and (any (cut regexp-exec <> name)
- upgrade-regexps)
- (upgradeable? name version path)
- (find-package name
- (or output "out"))))
- (_ #f))
- installed))))
- (install (append
- upgrade
- (filter-map (match-lambda
- (('install . (? package? p))
- (package->tuple p))
- (('install . (? store-path?))
- #f)
- (('install . package)
- (find-package package))
- (_ #f))
- opts)))
- (drv (filter-map (match-lambda
- ((name version sub-drv
- (? package? package)
- (deps ...))
- (check-package-freshness package)
- (package-derivation (%store) package))
- (_ #f))
- install))
- (install* (append
- (filter-map (match-lambda
- (('install . (? package? p))
- #f)
- (('install . (? store-path? path))
- (let-values (((name version)
- (package-name->name+version
- (store-path-package-name
- path))))
- `(,name ,version #f ,path ())))
- (_ #f))
- opts)
- (map (lambda (tuple drv)
- (match tuple
- ((name version sub-drv _ (deps ...))
- (let ((output-path
- (derivation->output-path
- drv sub-drv)))
- `(,name ,version ,sub-drv ,output-path
- ,(canonicalize-deps deps))))))
- install drv)))
- (remove (filter-map (match-lambda
- (('remove . package)
- package)
- (_ #f))
- opts))
- (remove* (filter-map (cut assoc <> installed) remove))
- (packages (append install*
- (fold (lambda (package result)
- (match package
- ((name _ out _ ...)
- (filter (negate
- (cut same-package? <>
- name out))
- result))))
- (fold alist-delete installed remove)
- install*))))
+ (cond ((and (assoc-ref opts 'roll-back?) (not dry-run?))
+ (begin
+ (roll-back profile)
+ (process-actions (alist-delete 'roll-back? opts))))
+ ((and (assoc-ref opts 'delete-generations)
+ (not dry-run?))
+ (filter-map
+ (match-lambda
+ (('delete-generations . pattern)
+ (cond ((not (file-exists? profile)) ; XXX: race condition
+ (leave (_ "profile '~a' does not exist~%")
+ profile))
+ ((string-null? pattern)
+ (let ((numbers (generation-numbers profile)))
+ (if (equal? numbers '(0))
+ (exit 0)
+ (for-each display-and-delete
+ (delete current-generation-number
+ numbers)))))
+ ;; Do not delete the zeroth generation.
+ ((equal? 0 (string->number pattern))
+ (exit 0))
+ ((matching-generations pattern profile)
+ =>
+ (lambda (numbers)
+ (if (null-list? numbers)
+ (exit 1)
+ (for-each delete-generation numbers))))
+ (else
+ (leave (_ "invalid syntax: ~a~%")
+ pattern)))
+
+ (process-actions
+ (alist-delete 'delete-generations opts)))
+ (_ #f))
+ opts))
+ (else
+ (let* ((installed (manifest-packages (profile-manifest profile)))
+ (upgrade-regexps (filter-map (match-lambda
+ (('upgrade . regexp)
+ (make-regexp (or regexp "")))
+ (_ #f))
+ opts))
+ (upgrade (if (null? upgrade-regexps)
+ '()
+ (let ((newest (find-newest-available-packages)))
+ (filter-map
+ (match-lambda
+ ((name version output path _)
+ (and (any (cut regexp-exec <> name)
+ upgrade-regexps)
+ (upgradeable? name version path)
+ (find-package name
+ (or output "out"))))
+ (_ #f))
+ installed))))
+ (install (append
+ upgrade
+ (filter-map (match-lambda
+ (('install . (? package? p))
+ (package->tuple p))
+ (('install . (? store-path?))
+ #f)
+ (('install . package)
+ (find-package package))
+ (_ #f))
+ opts)))
+ (drv (filter-map (match-lambda
+ ((name version sub-drv
+ (? package? package)
+ (deps ...))
+ (check-package-freshness package)
+ (package-derivation (%store) package))
+ (_ #f))
+ install))
+ (install*
+ (append
+ (filter-map (match-lambda
+ (('install . (? package? p))
+ #f)
+ (('install . (? store-path? path))
+ (let-values (((name version)
+ (package-name->name+version
+ (store-path-package-name
+ path))))
+ `(,name ,version #f ,path ())))
+ (_ #f))
+ opts)
+ (map (lambda (tuple drv)
+ (match tuple
+ ((name version sub-drv _ (deps ...))
+ (let ((output-path
+ (derivation->output-path
+ drv sub-drv)))
+ `(,name ,version ,sub-drv ,output-path
+ ,(canonicalize-deps deps))))))
+ install drv)))
+ (remove (filter-map (match-lambda
+ (('remove . package)
+ package)
+ (_ #f))
+ opts))
+ (remove* (filter-map (cut assoc <> installed) remove))
+ (packages
+ (append install*
+ (fold (lambda (package result)
+ (match package
+ ((name _ out _ ...)
+ (filter (negate
+ (cut same-package? <>
+ name out))
+ result))))
+ (fold alist-delete installed remove)
+ install*))))
(when (equal? profile %current-profile)
(ensure-default-profile))
@@ 950,7 1022,7 @@ more information.~%"))
count)
count)
(display-search-paths packages
- profile))))))))))
+ profile)))))))))))
(define (process-query opts)
;; Process any query specified by OPTS. Return #t when a query was
@@ 142,6 142,17 @@ then
# Make sure LIBRARY_PATH gets listed by `--search-paths'.
guix package --bootstrap -p "$profile" -i guile-bootstrap -i gcc-bootstrap
guix package --search-paths -p "$profile" | grep LIBRARY_PATH
+
+ # Delete the third generation and check that it was actually deleted.
+ guix package -p "$profile" --delete-generations=3
+ test -z "`guix package -p "$profile" -l 3`"
+
+ # Exit with 1 when a generation does not exist.
+ if guix package -p "$profile" --delete-generations=42;
+ then false; else true; fi
+
+ # Exit with 0 when trying to delete the zeroth generation.
+ guix package -p "$profile" --delete-generations=0
fi
# Make sure the `:' syntax works.