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https://github.com/offen/docker-volume-backup.git
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Frederik Ring
7cfea62933
* Hoist control for exiting script a level up * Do not accidentally nil out errors * Log when running schedule * Remove duplicate log line * Warn on cron schedule that will never run
30 lines
574 B
Go
30 lines
574 B
Go
// Copyright 2024 - Offen Authors <hioffen@posteo.de>
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// SPDX-License-Identifier: MPL-2.0
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package main
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import (
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"time"
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"github.com/robfig/cron/v3"
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)
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// checkCronSchedule detects whether the given cron expression will actually
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// ever be executed or not.
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func checkCronSchedule(expression string) (ok bool) {
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defer func() {
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if err := recover(); err != nil {
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ok = false
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}
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}()
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sched, err := cron.ParseStandard(expression)
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if err != nil {
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ok = false
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return
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}
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now := time.Now()
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sched.Next(now) // panics when the cron would never run
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ok = true
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return
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}
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