I have a script that takes text as an argument and encodes it. If the text contains only single quotes I surround it with double and vice versa, but it gets tricky if it contains both because it will be closed at first appearance.

script "I can't use "test" text"
// Double quote will be terminated at "I can't use "

So how to escape both cases without using a backslash, like in python using triple single, or double quotes.

script '''I can't use "test" text'''
// or
script """I can't use "test" text"""

>Solution :

Use a here-document, and use command subsitution to turn it into an argument.

script "$(cat <<'EOF'
I can't use "test" text
EOF)"

Or