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error() {
echo "$@" >&2
}
fatal() {
error "$@"
exit 1
}
set_source_and_root_dir() {
{ set +x; } 2>/dev/null
source_dir="$( cd -P "$( dirname "$0" )" >/dev/null 2>&1 && pwd )"
root_dir=$(cd "$source_dir" && cd ../ && pwd)
cd "$root_dir"
}