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Re: Bug report: `setopt noaliases` not respected in `local` statement without assignment.
- X-seq: zsh-workers 45650
- From: Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>
- To: Roman Perepelitsa <roman.perepelitsa@xxxxxxxxx>
- Subject: Re: Bug report: `setopt noaliases` not respected in `local` statement without assignment.
- Date: Sun, 29 Mar 2020 20:47:02 +0000
- Cc: Marlon Richert <marlon.richert@xxxxxxxxx>, Zsh hackers list <zsh-workers@xxxxxxx>
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Roman Perepelitsa wrote on Sun, 29 Mar 2020 12:24 +0200:
> On Thu, Mar 26, 2020 at 11:34 PM Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx> wrote:
> >
> > There are a few other options to worry about, e.g., KSH_ARRAYS,
> > IGNORE_CLOES_BRACES.
>
> Good point.
>
> I also should've mentioned that `emulate zsh -o no_aliases -c "..."`
> shouldn't be used if some of the functions you define must run with
> user-defined options. E.g., if you want to respect user's
> dot_glob/no_dot_glob (fzf does) or
> interactive_comments/no_interactive_comments (f-sy-h does), then this
> approach is out.
z-sy-h handles this by saving ${options} to an associative array before
resetting the options so it can execute:
86 # Before we 'emulate -L', save the user's options
87 local -A zsyh_user_options
88 if zmodload -e zsh/parameter; then
89 zsyh_user_options=("${(kv)options[@]}")
90 else
91 local canonical_options onoff option raw_options
92 raw_options=(${(f)"$(emulate -R zsh; set -o)"})
93 canonical_options=(${${${(M)raw_options:#*off}%% *}#no} ${${(M)raw_options:#*on}%% *})
94 for option in "${canonical_options[@]}"; do
95 [[ -o $option ]]
96 # This variable cannot be eliminated c.f. workers/42101.
97 onoff=${${=:-off on}[2-$?]}
98 zsyh_user_options+=($option $onoff)
99 done
100 fi
101 typeset -r zsyh_user_options
102
103 emulate -L zsh
(I'll fix lines 95-98 in a minute, though.)
Cheers,
Daniel
> Here's another option that doesn't require one to create a new file:
>
> () { 'emulate' '-L' 'zsh' '-o' 'no_aliases' && 'eval' "$(<<\END
>
> # original file content goes here
>
> END
> )"; }
>
> Downsides:
>
> - one fork (increases loading time)
> - breaks syntax highlighting in code editors
> - zcompile won't be effective at speeding up loading time
> - some aliases can still break this; for example: alias -g '()'=nope
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