escape " double quotes" and slash (/) while variable substitution in sed

Question

I want to escape "" and / for my VAR. InFile contains below variable

var_value='"skdskdlskdlskjdlsdjsld/jshdks00=="' 
Echo ${var_value} 
"skdskdlskdlskjdlsdjsld/jshdks00==" 

While substitution i do not want / and "" I tried

sed "s#JWT=<<CHANGE_ME>>#"${JWT}"#g" InFile > OutFile 

Expected OutFile :

JWT=skdskdlskdlskjdlsdjsld/jshdks00==

A help here would be much appreciated

Answer 1

Use

sed 's#JWT=<<CHANGE_ME>>#JWT='"${JWT}"'#g' InFile > OutFile 

Here, the concatenation scheme is the following:

's#JWT=<<CHANGE_ME>>#JWT='"${JWT}"'#g'
|------------------------||------||--|
             1               2      3     

• 1 - single quoted part
• 2 - a double quoted string with interpolated variable
• 3 - single quoted part again.

See the online demo:

#!/bin/bash
JWT="skdskdlskdlskjdlsdjsld/jshdks00=="
sed 's#JWT=<<CHANGE_ME>>#JWT='"${JWT}"'#g' <<< "JWT=<<CHANGE_ME>>"
## => JWT=skdskdlskdlskjdlsdjsld/jshdks00==