Re: [feature request] parameter transformation to safely add strings to PS1, &c.

[Alex fxmbsw7 Ratchev]

what about @Q
and renoving the beginning and ending ' s


On Sun, Aug 22, 2021, 23:13 Emanuele Torre <torreemanuele6@gmail.com> wrote:

> It would be nice to have a parameter transformation (e.g. "${par@p}")
> that expands $par to a string that will not be expanded by PS1, PS2, &c.
>
> example:
>
>   tmp_var=$(blabla) # this variable will not exist when PS1 is expanded
>   PS1="blabla ${tmp_var@p} blabla"
>
> I think a valid way to achieve the same behaviour in the currenct
> version of bash:
>
>   tmp_var=$(blabla)
>   tmp_var=${tmp_var//\\/\\\\}
>   tmp_var=${tmp_var//\`/\\\`}
>   tmp_var=${tmp_var//$/\\$}
>   PS1="blabla $tmp_var blabla"
>
> But a parameter transformation would be nicer.
>
> This parameter transformation should also make sure to not cause an
> expansion when concatenated.
>
>   var='$'
>   printf '%s\n' "${var@p}" # should not expand to `$'.
>   PS1="${var@P}(date)" # because this should expand to `$(date)'
>                        # and not to the output of `date'.
>
> Cheers,
>   emanuele6
>
>