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bug#51466: bug#53355: bug#51466: bug#53355: guix shell --check: confusin
From: |
Bengt Richter |
Subject: |
bug#51466: bug#53355: bug#51466: bug#53355: guix shell --check: confusing error message |
Date: |
Mon, 20 Jun 2022 19:56:56 +0200 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
Sorry to reply to myself, but forgot to illustrate.
On +2022-06-20 12:12:10 +0200, bokr@bokr.com wrote:
> Hi Chris,
[...]
>
> I have had some mystery bash parsing errors, and I noticed
> set|less
> shows a heck of a lot of functions defined that I don't
> remember seeing in the past.
> Anyway, shouldn't stuff like that have better hygiene than just prefixed
> _underscore ? Or maybe set|less doesn't show all that on your system?
>
There are a couple functions without prefixed underscore too,
which invoke some underscore-prefixed ones that look too trusting
of their arguments if you ask me: can someone declare these safe?
I think I can grok quote () ...
(escape single quotes and enclose result in single quotes, trusting bash state)
But what if I want to define my own function quote?? How would I know I was
overriding this? I really don't like my programming space occupied by unknowns
:-(
--8<---------------cut here---------------start------------->8---
quote ()
{
local quoted=${1//\'/\'\\\'\'};
printf "'%s'" "$quoted"
}
--8<---------------cut here---------------end--------------->8---
but this one below will take more time than I want to spend on code
I'm not intentionally going to use, and which invites name clashes
in my command name space :-(
--8<---------------cut here---------------start------------->8---
quote_readline ()
{
local quoted;
_quote_readline_by_ref "$1" ret;
printf %s "$ret"
}
--8<---------------cut here---------------end--------------->8---
where the above calls this:
--8<---------------cut here---------------start------------->8---
_quote_readline_by_ref ()
{
if [ -z "$1" ]; then
printf -v $2 %s "$1";
else
if [[ $1 == \'* ]]; then
printf -v $2 %s "${1:1}";
else
if [[ $1 == ~* ]]; then
printf -v $2 ~%q "${1:1}";
else
printf -v $2 %q "$1";
fi;
fi;
fi;
[[ ${!2} == \$* ]] && eval $2=${!2}
}
--8<---------------cut here---------------end--------------->8---
HTH somehow.
--
Regards,
Bengt Richter