support extended cron syntax

[machenity]

Does this package have any plan to support non-standard cron syntax?
Like, https://en.wikipedia.org/wiki/Cron#Non-standard_characters

I am using this package really well but I needed to use extended syntax for some reasons.
Now I extended the codes myself but it would be great if these syntaxes are supported natively.

Feature specification: #435 (comment)

[ncb000gt]

Thanks for the resource. I've gone back and forth on supporting extended characters before. Mostly my issue is that I just don't have time to build out the support myself. If you've done it I'd review a pr for sure. Thanks!

[Deepak13245]

Hi,
I would like to take this up. Please assign it to me

[ncb000gt]

@Deepak13245 did you ever end up making any progress on this task?

[ramvinoth]

Any update on this? Thanks in advance.

[sheerlox]

I propose we implement the following extended characters list:

?: The question mark is substituted with the time of initialization. For example, ? ? * * * * would be substituted with 25 8 * * * * if the time is 08:25 at the time of new Cron('? ? * * * *', <...>). The question mark can be used in any field.

L: The letter L can be used in the day of the month field to indicate the last day of the month. When used in the day of the week field in conjunction with the # character, it denotes the last specific weekday of the month. For example, 5#L represents the last Friday of the month.

#: The # character specifies the “nth” occurrence of a particular day within a month. For example, supplying 5#2 in the day-of-week field signifies the second Friday of the month. This can be combined with ranges and supports day names. For instance, MON-FRI#2 would match the Monday through Friday of the second week of the month.

source: croner documentation

this only leaves out the W character for day-of-month, which "is used to specify the weekday (Monday-Friday) nearest the given day", and it doesn't seem like a priority to implement. this could be nice to have, but we can probably leave it out for now.

[mfcarroll]

#: The # character specifies the “nth” occurrence of a particular day within a month. For example, supplying 5#2 in the day-of-week field signifies the second Friday of the month. This can be combined with ranges and supports day names. For instance, MON-FRI#2 would match the Monday through Friday of the second week of the month.

I'd find this particular extended syntax incredibly useful for my project. Just wondering if there's been any progress here, or if there's anything I can do to help make it happen. Thanks!

[sheerlox]

I'd find this particular extended syntax incredibly useful for my project. Just wondering if there's been any progress here, or if there's anything I can do to help make it happen. Thanks!

Hey there! Because we maintainers have had a very low bandwidth lately, we are waiting for volunteers to pick up on some of the waiting feature requests. If you'd be interested in taking a shot at implementing the extended cron syntax, I'd be glad to entertain any PR and give a hand if necessary!

[alexanderkrum]

Picking this up

[sheerlox]

Picking this up

Great! Don't hesitate to open a draft PR as soon as you have some changes if you'd like some guidance 😃

[alexanderkrum]

Yeah will do today.