Make --help default behavior?

[snoyberg]

I've noticed this on a number of projects in the past. Would it be possible to modify the library so that running an executable with no arguments is the same as --help? This seems like behavior people would like, e.g. when running stackage.

Pinging @chrisdone @DanBurton

[chrisdone]

I'd agree. The default optparse output is kind of useless.

[DanBurton]

I presume you mean: when the arg parse fails because at least one arg is
mandatory. (If running with no args is a valid invocation, then the help
text should not interfere.)

On Thursday, April 16, 2015, Chris Done notifications@github.com wrote:

I'd agree. The default optparse output is kind of useless.

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[snoyberg]

Yes, that's what I meant. I discussed that with Chris, but didn't update the issue to clarify.

[snoyberg]

Good catch :)

[chrisdone]

Done in 5f73bcc.

[snoyberg]

LGTM, please release to Hackage.