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(if (file-exists? filepath)
(let* ((age-sec (lambda (file)
(if (file-exists? file)
(- (current-seconds) (file-modification-time file))
1000000000))) ;; return really old value if file doesn't exist. we want to clobber it if old or not exist.
(ok-flag #t)
(age-mins (lambda (file) (/ (age-sec file) 60)))
(age-hrs (lambda (file) (/ (age-min s file) 60)))
(age-days (lambda (file) (/ (age-hrs file) 24)))
(age-wks (lambda (file) (/ (age-days file) 7)))
(docmd (lambda (cmd)
(cond
(ok-flag
(let ((res (system cmd)))
(cond
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(if (file-exists? filepath)
(let* ((age-sec (lambda (file)
(if (file-exists? file)
(- (current-seconds) (file-modification-time file))
1000000000))) ;; return really old value if file doesn't exist. we want to clobber it if old or not exist.
(ok-flag #t)
(age-mins (lambda (file) (/ (age-sec file) 60)))
(age-hrs (lambda (file) (/ (age-mins file) 60)))
(age-days (lambda (file) (/ (age-hrs file) 24)))
(age-wks (lambda (file) (/ (age-days file) 7)))
(docmd (lambda (cmd)
(cond
(ok-flag
(let ((res (system cmd)))
(cond
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(if (not (file-exists? wksfile))
(copy daysfile wksfile))
;; if age(<file>.mins.gz) >= 1h:
;; copy <file>.mins.gz <file>.hrs.gz
;; copy <prev file> <file>.mins.gz
(when (>= (age-hrs minsfile) 1)
(copy minsfile hrsfile)
(copy+zip filepath minsfile))
;; if age(<file>.hrs.gz) >= 1d:
;; copy <file>.hrs.gz <file>.days.gz
;; copy <file>.mins.gz <file>.hrs.gz
(when (>= (age-days hrsfile) 1)
(copy hrsfile daysfile)
(copy minsfile hrsfile))
;; if age(<file>.days.gz) >= 1w:
;; copy <file>.days.gz <file>.weeks.gz
;; copy <file>.hrs.gz <file>.days.gz
(when (>= (age-weeks daysfile) 1)
(copy daysfile wksfile)
(copy hrsfile daysfile))
#t)
#f))
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(if (not (file-exists? wksfile))
(copy daysfile wksfile))
;; if age(<file>.mins.gz) >= 1h:
;; copy <file>.mins.gz <file>.hrs.gz
;; copy <prev file> <file>.mins.gz
(when (>= (age-mins minsfile) 1)
(copy minsfile hrsfile)
(copy+zip filepath minsfile))
;; if age(<file>.hrs.gz) >= 1d:
;; copy <file>.hrs.gz <file>.days.gz
;; copy <file>.mins.gz <file>.hrs.gz
(when (>= (age-days hrsfile) 1)
(copy hrsfile daysfile)
(copy minsfile hrsfile))
;; if age(<file>.days.gz) >= 1w:
;; copy <file>.days.gz <file>.weeks.gz
;; copy <file>.hrs.gz <file>.days.gz
(when (>= (age-wks daysfile) 1)
(copy daysfile wksfile)
(copy hrsfile daysfile))
#t)
#f))
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