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ui: Add 'matching-generations'.

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* guix/scripts/package.scm (matching-generations): Move to...
* guix/ui.scm (matching-generations): ... here.
This commit is contained in:
Ludovic Courtès 2015-10-26 19:03:56 +01:00
parent 9685661324
commit e49de93aa5
2 changed files with 67 additions and 66 deletions
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66
guix/scripts/package.scm
View file

@ -177,72 +177,6 @@ (define (delete-generations store profile generations)
(for-each (cut delete-generation store profile <>)
generations))
(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.
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)))
(fold-right (lambda (x acc)
(if (valid-generation? x)
(cons x acc)
acc))
'()
lst))
(define (filter-generations generations)
(match generations
(() '())
(('>= n)
(drop-while (cut > n <>)
(generation-numbers profile)))
(('<= n)
(valid-generations (iota n 1)))
((lst ..1)
(valid-generations lst))
(_ #f)))
(define (filter-by-duration duration)
(define (time-at-midnight time)
;; Return TIME at midnight by setting nanoseconds, seconds, minutes, and
;; hours to zeros.
(let ((d (time-utc->date time)))
(date->time-utc
(make-date 0 0 0 0
(date-day d) (date-month d)
(date-year d) (date-zone-offset d)))))
(define generation-ctime-alist
(map (lambda (number)
(cons number
(time-second
(time-at-midnight
(generation-time profile number)))))
(generation-numbers profile)))
(match duration
(#f #f)
(res
(let ((s (time-second
(subtract-duration (time-at-midnight (current-time))
duration))))
(delete #f (map (lambda (x)
(and (duration-relation s (cdr x))
(first x)))
generation-ctime-alist))))))
(cond ((string->generations str)
=>
filter-generations)
((string->duration str)
=>
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

67
guix/ui.scm
View file

@ -84,6 +84,7 @@ (define-module (guix ui)
specification->file-system-mapping
string->generations
string->duration
matching-generations
run-guix-command
run-guix
program-name
@ -948,6 +949,72 @@ (define (hours->duration hours match)
(hours->duration (* 24 30) match)))
(else #f)))
(define* (matching-generations str 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.
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)))
(fold-right (lambda (x acc)
(if (valid-generation? x)
(cons x acc)
acc))
'()
lst))
(define (filter-generations generations)
(match generations
(() '())
(('>= n)
(drop-while (cut > n <>)
(generation-numbers profile)))
(('<= n)
(valid-generations (iota n 1)))
((lst ..1)
(valid-generations lst))
(_ #f)))
(define (filter-by-duration duration)
(define (time-at-midnight time)
;; Return TIME at midnight by setting nanoseconds, seconds, minutes, and
;; hours to zeros.
(let ((d (time-utc->date time)))
(date->time-utc
(make-date 0 0 0 0
(date-day d) (date-month d)
(date-year d) (date-zone-offset d)))))
(define generation-ctime-alist
(map (lambda (number)
(cons number
(time-second
(time-at-midnight
(generation-time profile number)))))
(generation-numbers profile)))
(match duration
(#f #f)
(res
(let ((s (time-second
(subtract-duration (time-at-midnight (current-time))
duration))))
(delete #f (map (lambda (x)
(and (duration-relation s (cdr x))
(first x)))
generation-ctime-alist))))))
(cond ((string->generations str)
=>
filter-generations)
((string->duration str)
=>
filter-by-duration)
(else #f)))
(define* (package-specification->name+version+output spec
#:optional (output "out"))
"Parse package specification SPEC and return three value: the specified