Question

I have a file that contains a somehow bad translation of PHP code to TWIG, I need to remove only the first and last occurence of parenthesis () and any occurence of $ that is enclosed between {% and %} tags

For example if in the file there is:

{% if($var.has($something)) %}
This symbols ($($)$) won't be deleted becoase they aren't between {% and %}

I need that get transformed into:

{% if var.has( something) %}
This symbols ($($)$) won't be deleted becoase they aren't between {% and %}

Any ideas of how to do this?

Answer 1

How accurate do you need it? If you don’t have multiple {% %} {% %} on a single line (or if you can s/%}/&\n/g to prevent that), you could use the horrifyingly ugly

sed -e ':s; s/{%\(.*\)\$\(.*\)%}/{%\1\2%}/; ts; s/{%\([^(]*\)(\(.*\))\(.*\)%}/{%\1 \2 \3%}/'

It removes all $s inside {% %}, and then the outermost parenthesis if any.