Re: Prevent a specific function from being xtrace'd

[Bart Schaefer <schaefer@brasslantern.com>]

On Mon, Aug 23, 2021 at 9:42 AM Zach Riggle <zachriggle@gmail.com> wrote:
>
> Hello all!
>
> ~~ TL; DR ~~
> Is there any way to mark or annotate a function such that its internals should not be traced, even if "set -x" or "zsh -x" is used?

emulate zsh +x -c 'autoload untraced'

(The name "untraced" is for example, not some sort of extra magic.)
It also works for

emulate zsh +x -c 'untraced() { ... }'

but that requires that you're careful about quoting in the function body.

Of course you can still force tracing back on with
  functions -t untraced
or the function internally calling "set -x" etc.

> I've created a small script[1] that somewhat achieves this effect, with TRAPDEBUG and ZSH_DEBUG_COMMAND

>> local first_line=$(head -1 <<<$ZSH_DEBUG_CMD)

Egad.

local first_line=${ZSH_DEBUG_CMD%%$'\n'*}