Duration string parsing and formatting (seconds, minutes, hours, days)
(scm duration) converts between human-friendly duration strings and a plain number of seconds — handy for config values and command-line options like --timeout 30s.
(import (scm duration))
(parse-duration "30") ;; => 30 ; a bare number is seconds
(parse-duration "10m") ;; => 600
(parse-duration "3h") ;; => 10800
(parse-duration "1d") ;; => 86400
(parse-duration "x") ;; => #f ; unparseable input
(format-duration 3600) ;; => "1h"
(format-duration 90) ;; => "90s"parse-duration accepts a bare integer or one suffixed with s/m/h/d (seconds/minutes/hours/days), and returns #f for anything it cannot parse. format-duration is the inverse: it uses a d/h/m suffix when the value divides evenly, otherwise a plain seconds value with an s suffix.
2 bindings
Syntax: (format-duration seconds) Library: (scm duration) Description: Human-readable inverse of parse-duration. Emits a d/h/m suffix when seconds divides evenly by 86400/3600/60; otherwise emits a plain seconds value with the s suffix. Non-integer or negative input is rendered as the integer itself (or empty string for non-numbers). Example: (format-duration 3600) => "1h" (format-duration 86400) => "1d" (format-duration 90) => "90s" (format-duration 0) => "0s"
Syntax: (parse-duration s) Library: (scm duration) Description: Parses a duration string into a non-negative integer number of seconds. Accepts a bare integer (interpreted as seconds), or an integer suffixed with one of s/m/h/d (seconds/minutes/hours/days). Returns #f if s is not a string, is empty, or does not parse. Example: (parse-duration "30") => 30 (parse-duration "30s") => 30 (parse-duration "10m") => 600 (parse-duration "3h") => 10800 (parse-duration "1d") => 86400 (parse-duration "x") => #f