Error handling

FILE="$IMG/boot.img"

rm -f "$FILE"

echo "Downloading $BOOT..."

echo "Downloading ${BOOT}..."

# Check if running with interactive TTY or redirected to docker log

if [ -t 1 ]; then

  wget "$BOOT" -O "$FILE".tmp -q --no-check-certificate --show-progress

  wget "${BOOT}" -O "$FILE".tmp -q --no-check-certificate --show-progress

else

  wget "$BOOT" -O "$FILE".tmp -q --no-check-certificate --show-progress --progress=dot:giga

  wget "${BOOT}" -O "$FILE".tmp -q --no-check-certificate --show-progress --progress=dot:giga

fi

[ ! -f "$FILE".tmp ] && echo "Download failed" && exit 61

[ ! -f "$FILE".tmp ] && echo "Failed to download ${BOOT}" && exit 61

mv -f "$FILE".tmp "$FILE"