sed: Replacing variableURLs in a file for iOS

Today I had to write a little script to take 2 environment variables and replace the values in a text file.

The following:

sed -i "s/"${LOCALHOST_ADDRESS}"/${APIGATEWAY_ADDRESS}/g" path/to/my/file

Error out with:

sed: 1: “path/to/my/file …“: command i expects \ followed by text

To fix it I had to use

sed -i '' "s~${LOCALHOST_ADDRESS}~${APIGATEWAY_ADDRESS}~g" path/to/my/file

Notice this:

• ‘’ the single quotes after -i which are required for the iOS
• ~ which is required to escape the // in the URL addresses

There you have it!