Formatted date

[donat-b]

What is the preferred way to get formatted date (e.g. date +%F in shell)?
Thanks.

[Gabriella439]

turtle provides some default date/time formatting with the Turtle.Format.utc format specifier. Here's an example of how you could use it:

{-# LANGUAGE OverloadedStrings #-}

import Turtle

main :: IO ()
main = do
    d <- date
    printf (utc%"\n") d

That formats the date using the following format which just uses the default Show implementation for UTCTime

2017-06-07 17:14:33.278543 UTC

If you have other date/time formats in mind that you'd like turtle to support just let me know

[donat-b]

Hmm, how about ISO 8601? I'm mostly interested in YYYY-MM-DDThh:mm:ss representation.

[3noch]

Technically that is an ISO 8601-compliant format.

[donat-b]

Well, yeah. But I think it makes sense to add more atomic control over format, for instance, showing just date or time.

[Gabriella439]

So I can provide an iso8601 format specifier to make the date-time format explicit, but I think for anything more complex than that you should use the Data.Time.Format module directly:

https://hackage.haskell.org/package/time-1.8.0.2/docs/Data-Time-Format.html