diffdir.sh

#!/bin/bash

# "diff" two different directories, outputting the filesize difference between them.
# 
# $ diffdir foo bar
# foo/baz.js: 52b
# bar/baz.js: 50b


# ensure we are only dealing with two directories
if [[ "$#" -ne 2  || !( -d "$1" && -d "$2") ]]; then
  echo "need to pass two valid directories";
  exit 1
fi

FILES_TO_DIFF=$(/usr/bin/diff -qr "$1" "$2" | awk '{print $2}')

for file in $FILES_TO_DIFF; do
  filename=$(basename $file);
  file1="$1"/"$filename"
  file2="$2"/"$filename"
  echo $file1: $(du -k "$file1" | cut -f1)b
  echo $file2: $(du -k "$file2" | cut -f1)b
  echo ''
done;