wait-for-file 264 Bytes
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#!/bin/sh

set -eu

file="$1"

total=0
while [ "$total" -lt 10 ]; do
  if sudo test -f "$file"; then
    exit 0
  fi
  sleep 1
  total=$(($total + 1))
done
echo "E: $file not found! Other files in the same directory:" >&2
sudo ls -1d $(dirname $file)/* >&2
exit 1