tools/find-root


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#!/bin/sh

set -eu

if [ ! "${1:-}" ]; then
    exit 1
fi

BASEDIR="$(dirname "$1")"

while read -r glob; do
    cd "$BASEDIR"

    while [ "$PWD" != "/" ]; do
        set -- $glob

        if [ -e "$1" ]; then
            echo "$PWD"
            exit 0
        fi

        cd ..
    done
done

echo "$BASEDIR"