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guix package: '--delete-generations' deletes generations older than specified. 

* guix/scripts/package.scm (matching-generations): Add
  'duration-relation' keyword parameter.
  (guix-package)[process-action](delete-generations): Pass
  #:duration-relation >.
* tests/guix-package.sh: Add test.
* doc/guix.texi (Invoking guix package): Clarify the meaning of
  durations for '--list-durations' and '--delete-durations'.
master
Ludovic Courtès 2013-09-27 01:17:01 +02:00
parent 03f4ef28b1
commit d7ddb257c9
3 changed files with 30 additions and 10 deletions
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18
doc/guix.texi
View File

@ -711,18 +711,24 @@ second one.
@item @emph{Durations}. You can also get the last @emph{N}@tie{}days, weeks,
or months by passing an integer along with the first letter of the
duration, e.g., @code{--list-generations=20d}.
duration. For example, @code{--list-generations=20d} lists generations
that are up to 20 days old.
@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.
When @var{pattern} is omitted, delete all generations except the current
one.
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.
When @var{pattern} is specified, delete the matching generations. When
@var{pattern} specifies a duration, generations @emph{older} than the
specified duration match. For instance, @code{--delete-generations=1m}
deletes generations that are more than one month old.
If the current generation matches, it is deleted atomically---i.e., by
switching to the previous available generation. Note that the zeroth
generation is never deleted.
@end table

15
guix/scripts/package.scm
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@ -258,9 +258,12 @@ all of PACKAGES, a list of name/version/output/path/deps tuples."
(make-time time-utc 0
(stat:ctime (stat (format #f "~a-~a-link" profile number)))))
(define* (matching-generations str #:optional (profile %current-profile))
(define* (matching-generations str #:optional (profile %current-profile)
#:key (duration-relation <=))
"Return the list of available generations matching a pattern in STR. See
'string->generations' and 'string->duration' for the list of valid patterns."
'string->generations' and 'string->duration' for the list of valid patterns.
When STR is a duration pattern, return all the generations whose ctime has
DURATION-RELATION with the current time."
(define (valid-generations lst)
(define (valid-generation? n)
(any (cut = n <>) (generation-numbers profile)))
@ -309,7 +312,7 @@ all of PACKAGES, a list of name/version/output/path/deps tuples."
(subtract-duration (time-at-midnight (current-time))
duration))))
(delete #f (map (lambda (x)
(and (<= s (cdr x))
(and (duration-relation s (cdr x))
(first x)))
generation-ctime-alist))))))
@ -887,7 +890,11 @@ more information.~%"))
;; Do not delete the zeroth generation.
((equal? 0 (string->number pattern))
(exit 0))
((matching-generations pattern profile)
;; 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)

7
tests/guix-package.sh
View File

@ -168,6 +168,13 @@ then false; else true; fi
# Check whether `--list-available' returns something sensible.
guix package -p "$profile" -A 'gui.*e' | grep guile
# There's no generation older than 12 months, so the following command should
# have no effect.
generation="`readlink_base "$profile"`"
if guix package -p "$profile" --delete-generations=12m;
then false; else true; fi
test "`readlink_base "$profile"`" = "$generation"
#
# Try with the default profile.
#