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#22 in #month
130 downloads per month
Used in 5 crates
(3 directly)
65KB
1.5K
SLoC
clockwork-cron
A cron expression parser that's safe to use in the Solana runtime. Works with stable Rust v1.28.0.
use clockwork_cron::Schedule;
use chrono::{DateTime, NaiveDateTime, Utc};
use std::str::FromStr;
fn main() {
// sec min hour day of month month day of week year
let expression = "0 30 9,12,15 1,15 May-Aug Mon,Wed,Fri 2018/2";
let schedule = Schedule::from_str(expression).unwrap();
let ts = 1234567890;
let next_ts = schedule
.after(&DateTime::<Utc>::from_utc(
NaiveDateTime::from_timestamp(ts, 0),
Utc,
))
.take(1)
.next()
{
Some(datetime) => Some(datetime.timestamp()),
None => None,
}
}
/*
Upcoming fire times:
-> 2018-06-01 09:30:00 UTC
-> 2018-06-01 12:30:00 UTC
-> 2018-06-01 15:30:00 UTC
-> 2018-06-15 09:30:00 UTC
-> 2018-06-15 12:30:00 UTC
-> 2018-06-15 15:30:00 UTC
-> 2018-08-01 09:30:00 UTC
-> 2018-08-01 12:30:00 UTC
-> 2018-08-01 15:30:00 UTC
-> 2018-08-15 09:30:00 UTC
*/
⚠️ Syntax
sec min hour day of month month day of week year
If you use tools such as crontab guru, note that the clockwork parser is a 7 columns string. You probably need to add the seconds (left most column) and can optionally add the year (right most column). e.g. the following 5 columns cron:
min | hour | day of month | month | day of week |
---|---|---|---|---|
0 | 18 | * | * | FRI |
becomes
sec | min | hour | day of month | month | day of week | year |
---|---|---|---|---|---|---|
0 | 0 | 18 | * | * | FRI | * |
or
sec | min | hour | day of month | month | day of week |
---|---|---|---|---|---|
0 | 0 | 18 | * | * | FRI |
These are also supported:
"@yearly"
"@weekly"
"@daily"
"@hourly"
Dependencies
~2MB
~37K SLoC