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#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -eu
set -o pipefail
# Note: 'grep ... >/dev/null' instead of just 'grep -q' is used intentionally
# here, since 'grep -q' exits on the first match causing SIGPIPE being
# sent to the sender.
BINARY="${1:?}"
export SYSTEMD_LOG_LEVEL=info
if [[ ! -x "$BINARY" ]]; then
echo "$BINARY is not an executable"
exit 1
fi
# output width
if "$BINARY" --help | grep -v 'default:' | grep -E '.{80}.' >/dev/null; then
echo "$(basename "$BINARY") --help output is too wide:"
"$BINARY" --help | awk 'length > 80' | grep -E --color=yes '.{80}'
exit 1
fi
# --help prints something. Also catches case where args are ignored.
if ! "$BINARY" --help | grep . >/dev/null; then
echo "$(basename "$BINARY") --help output is empty"
exit 2
fi
# no --help output to stderr
if "$BINARY" --help 2>&1 1>/dev/null | grep .; then
echo "$(basename "$BINARY") --help prints to stderr"
exit 3
fi
# error output to stderr
if ! ("$BINARY" --no-such-parameter 2>&1 1>/dev/null || :) | grep . >/dev/null; then
echo "$(basename "$BINARY") with an unknown parameter does not print to stderr"
exit 4
fi
# --help and -h are equivalent
if ! diff <("$BINARY" -h) <("$BINARY" --help); then
echo "$(basename "$BINARY") --help and -h are not identical"
exit 5
fi
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