I'm trying to used sed to find and encrypt ansible_password field in an inventory file and encrypt it with ansible-vault command. But ansible-command is failing throwing an sed error, where as a simple echo is working fine.

sed -n "s/( *)(ansible_password: *)"(.*)"/$(echo 3)/p" sample.yml

is outputting the attribute value without the double quotes.

The ansible-vault command:

sed -n "s/( *)(ansible_password: *)"(.*)"/$(ansible-vault encrypt_string --vault-password-file ~/password.txt --name 'ansible_password' '3')/p" sample.yml

is throwing an error message: sed: -e expression #1, char 67: unterminated ``s' command

Here's the line where the substitution is happening:

        ansible_password: "somepassword"