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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
muffle [-n] [--] COMMAND...
muffle -h
EOF
}
help() {
cat <<-'EOF'
Options:
-n invert when to do the muffling
-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
INVERT=false
while getopts 'nh' flag; do
case "$flag" in
(n)
INVERT=true
;;
(h)
usage
help
exit
;;
(*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
export TMPDIR="$XDG_RUNTIME_DIR"
OUT="$(mkstemp)"
ERR="$(mkstemp)"
F="$(mkstemp)"
trap 'rm -f "$OUT" "$ERR" "$F"' EXIT
timed() {
ts -s -m '%.s'
}
{
statusf "$F" "$@" | pre -n out | timed > "$OUT"
} 2>&1 | pre -n err | timed > "$ERR"
STATUS="$(cat "$F")"
if [ "$INVERT" = false -a "$STATUS" != 0 ] || [ "$INVERT" = true -a "$STATUS" = 0 ]; then
sort -m "$OUT" "$ERR" | cut -d' ' -f2- | awk '{
print substr($0, length($1) + 2) > "/dev/std" $1
}'
exit "$STATUS"
fi
|
