trigger prexec function from a script

trigger prexec function from a script

[Eric Smith]

Oh Zshellers,

I have a prexec function and this works fine when I put a
filename on the prompt and press enter. How do I make the preexec
fire when I deliver the command from script?

FWIW;
function preexec {
local cmd
local application
cmd=(${(Q)${(z)3}})
if [[ $cmd[1] == (*foo) ]]; then
    application=bar
fi
if [ $application ];then
    eval "function ${(q)cmd[1]} {
        unsetopt noglob
        $application $url${(q)cmd[1]}" '$*
          return
        unfunction' "${(q)cmd[1]}
    }"
setopt noglob
fi

-- 
Eric Smith

Re: trigger prexec function from a script

[Peter Stephenson]

On Fri, 07 Jun 2013 11:47:11 +0200
Eric Smith <Eric.Smith@trustfood.org> wrote:
> I have a prexec function and this works fine when I put a
> filename on the prompt and press enter. How do I make the preexec
> fire when I deliver the command from script?

Unfortunately this is quite heavily tied to executing an interactive
command line, and I don't think turning on interactive mode for
executing the script is good enough either (though I haven't actually
tried).

You're best bet might be to use the DEBUG trap.  If you define the
function as TRAPDEBUG instead of preexec it'll get called before each
command.  The effect isn't quite the same, since it'll get called more
often than it would before a complete command line.  You can examine
what is about to be executed in $ZSH_DEBUG_CMD (see the documentation
for the trap builtin).

pws