Re: [PATCH] send-email: Defines smtpPassCmd config option

> On Fri, May 01, 2020 at 11:59:48PM +0000, brian m. carlson wrote:
> 
> > I think perhaps many folks aren't aware that you can invoke Git with an
> > arbitrary shell command as "credential.helper", which of course makes
> > life a lot easier.  So if you want to invoke a separate command, it's
> > really as easy as this:
> > 
> >   git config credential.smtp://smtp.crustytoothpaste.net.helper \
> >     '!f() { echo username=my-username; echo "password=$(my-password-command)"; }; f'
> > 
> > So I think that documenting the use of the credential helper is step 1,
> > because probably most people _do_ want to use that for their passwords,
> > and then documenting that credential helpers can be arbitrary shell
> > commands that speak the protocol is step 2, so that people who don't can
> > figure out a way to do what they want.
> > 
> > I'll send some patches later which document the latter feature, since I
> > don't think we mention it anywhere outside of the FAQ.  I actually
> > didn't know about it until Peff mentioned it to me one time.
> 
> This is documented, but only recently did it make it out of
> Documentation/technical/ and into gitcredentials(7). I don't mind adding
> more pointers, though.