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#!/usr/bin/env bash
# Usage:
# diff-epubs.sh path/to/old.epub path/to/new.epub
tmp_dir="$(mktemp -d --suffix=-diff-epubs)"
unzip "$1" -d "$tmp_dir/old" > /dev/null
unzip "$2" -d "$tmp_dir/new" > /dev/null
diff --strip-trailing-cr -r "$tmp_dir"/{old,new}
exit_status=$?
rm -rf "$tmp_dir"
exit $exit_status
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