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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
muffle [--] COMMAND...
muffle -h
EOF
}
help() {
cat <<-'EOF'
Options:
-h, --help show this message
COMMAND the COMMAND to be muffled
Conditionally omit STDOUT and STDERR of COMMAND:
if command exits with an error, print its original output to the
corresponding streams, but when there is no error, throw the
output away, "muffling" the COMMAND.
Examples:
Only print anything if the test fails:
$ muffle sh tests/assert-makefile.sh
EOF
}
for flag in "$@"; do
case "$flag" in
(--)
break
;;
(--help)
usage
help
exit
;;
(*)
;;
esac
done
while getopts 'h' flag; do
case "$flag" in
(h)
usage
help
exit
;;
(*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
OUT="$(mkstemp)"
ERR="$(mkstemp)"
trap 'rm -f "$OUT" "$ERR"' EXIT
STATUS=0
"$@" 1>"$OUT" 2>"$ERR" || STATUS=$?
if [ "$STATUS" != 0 ]; then
cat "$OUT"
cat "$ERR" >&2
exit "$STATUS"
fi
|
