Scheme to trim trailing whitespace from diffs via git filter

.gitattributes

* text eol=lf filter=cleanWhitespace

.gitconfig

[filter "cleanWhitespace"]
	clean = /home/mmore500/clean.sh %f

clean.sh

#!/bin/bash

# Check if a file name is provided
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <filename>"
    exit 1
fi

# Assign the filename to a variable
FILE="$1"

# Perform the operations
git show :"$FILE" > /tmp/from
cp "$FILE" /tmp/to
GIT_CONFIG_NOSYSTEM=1 HOME=/nonexistent git diff --no-index -- "/tmp/from" "/tmp/to" | sed '/^+/s/[[:space:]]*$//' > /tmp/patch
cat /tmp/patch | GIT_CONFIG_NOSYSTEM=1 HOME=/nonexistent git apply --allow-empty --unsafe-paths --directory=/ --whitespace=nowarn
cat /tmp/to | sed ':a;/^[ \n]*$/{$d;N;ba}'