Re: convolutions

[Ray Andrews <rayandrews@eastlink.ca>]

On 11/06/2015 06:49 PM, ZyX wrote:
>
>       echo "$(eval echo "\${$(cat in_file)}")" >! out_file
>
> That's the best I've been able to do expanding color variables, eg. "
> ${red} " into their native " \e[31;1m " in a file. It's not a prize
> winner as far as zsh obfuscation goes, still, can it be done more
> simply? Also, I'd not be surprised to learn that there's one of those
> ancient little utilities that already does that:
>
>
> “Ancient utility” is called `sed`. Specifically you are able to substitute text with the result of the evaluation of the shell code:
>
>      echo '${red}red' | sed -r 's/\$\{(\w+)\}/zsh -c ''echo ${(%%):-%F{\1}}''/e'
>
>
Well sure, but that's even more opaque than what I'm doing.  I'm a grade 
three sedder but the whole point was to see if I could get zsh to handle 
this internally.