prettier-diff

prettier-diff.sh

#!/bin/bash

# Exit immediately if a command exits with a non-zero status, amongst other improvements
# https://vaneyckt.io/posts/safer_bash_scripts_with_set_euxo_pipefail/
set -eux

#
# Example usage:
# ./prettier-diff.sh --no-index my-minified-file-before.js my-minified-file-after.js
#
# Inspired by https://github.com/josephfrazier/prettier-diff but this script is a lot simpler
# because it doesn't need to (dangerously) modify git files.
#

cat $2 | prettier --parser babel > a.js
cat $3 | prettier --parser babel > b.js

set +e
git diff $1 a.js b.js
set -e

rm -rf a.js b.js

instead of writing to a.js and b.js, you might consider using mktemp to create temp files. That way they aren't local and you don't need to worry about cleaning them up.

A=$(mktemp)
B=$(mktemp)

cat $2 | prettier --parser babel > $A
cat $3 | prettier --parser babel > $B

set +e
git diff $1 $A $B
set -e

Amazing, thanks Paul!