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From: Greg Wooledge <wooledg@eeg.ccf.org>
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Subject: Re: assert built-in
Date: Wed, 19 Aug 2015 11:48:26 -0400
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On Wed, Aug 19, 2015 at 08:39:15AM +0000, Craig wrote:
> It's somewhat cumbersome to have to transport this assert function from
> project to project, so it would save a considerable amount of effort and
> time if it were built-in.

> function assert() {
>     local lineno=${BASH_LINENO[0]} \
>           src=${BASH_SOURCE[1]} \
>           lines=()
> 
>     mapfile -n 1 -t -s $(( $lineno - 1 )) lines < "$src"
> 
>     printf "ASSERT: ${src##*/}:$lineno: %s\n" "$lines"
> 
>     exit 1
> }

I don't think there will be broad enough interest to justify bloating
bash with a feature that can be achieved with a 4-line function.  But
I only speak for myself, not for Chet.