Use jq to edit an existing file in-place
The jq tool is amazing, but it won’t change an existing file in-place. You can use the sponge utility to get around this:
jq ... input.json | sponge input.json
Alternative using ex:
WARNING! If you try this on an invalid JSON file, it will get erased. In a script, you can do
set -o pipefail to prevent this.jq ... input.json | ex -sc 'wq!input.json' /dev/stdin
