Re: execute or print one-liner

[Philippe Altherr <philippe.altherr@gmail.com>]

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Here is an idea:

# Helper function to define expandable functions
exec-or-expand() { if [[ -n $EXPAND ]]; then print -z "$@"; else "$@"; fi;
}

# Command to force the expansion of a function defined with exec-or-expand
expand() { EXPAND=1 "$@"; }

# Example of expandable function
f1() { exec-or-expand echo blahblah -o1 -o2 $1 -o3 $2 $3 }

% f1 a b c
blahblah -o1 -o2 a -o3 b c
% expand f1 a b c
% echo blahblah -o1 -o2 a -o3 b c
blahblah -o1 -o2 a -o3 b c

Caveat: probably won't do what's desired if redirections are used.

Philippe


On Wed, Nov 30, 2022 at 3:10 PM Thomas Lauer <thomas.lauer@virgin.net>
wrote:

> Hi folks,
>
> I have dozens, if not hundreds, of one-liners, many as aliases and many
> others as simple one-line functions (used whenever some parameters need
> a little massaging before execution). That's working very well.
>
> I have early on stumbled across a zsh function that would expand an
> alias on the command line so that I can edit or add stuff and I use that
> for many aliases. However, I just can't find a similar thing for
> one-line functions, ie a function that will just print the one-line
> function body to the command line but not execute it. Given
>
> f1() { blahblah -o1 -o2 $1 -o3 $2 $3 }
>
> executing f1() with three parameters is simple:
>
> f1 a b c
>
> What I'm looking for is a way to have f1's body injected into the
> command line, ie something akin to
>
> print -z blahblah -o1 -o2 -o3
>
> ($1-$3 will be empty as they are undefined.)
>
> I can write a second function print-z-ing the required string but that
> feels redundant... although I have no idea how to do this w/o such a
> function.
>
> Anyone got an idea?
>
> Thanks T
>
>

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