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#!/usr/bin/env bash
# This script executes a command while logging all output to a temporary
# file. If the command exits non-zero, then all output is sent to the console,
# before returning the exit code. If the script itself fails, the exit code 121
# is returned.
set -eo pipefail
SCRIPT_BASEDIR="$(basename $0)"
badusage() {
echo "Incorrect usage: $SCRIPT_BASEDIR) <command> [options]" > /dev/stderr
echo "ERROR: $1"
exit 121
}
COMMAND="$@"
[[ -n "$COMMAND" ]] || badusage "No command specified"
OUTPUT_TMPFILE="$(mktemp -p '' ${SCRIPT_BASEDIR}_output_XXXX)"
output_on_error() {
RET=$?
set +e
if [[ "$RET" -ne "0" ]]
then
echo "---------------------------"
cat "$OUTPUT_TMPFILE"
echo "[$(date --iso-8601=second)] <exit $RET> $COMMAND"
fi
rm -f "$OUTPUT_TMPFILE"
}
trap "output_on_error" EXIT
"$@" 2>&1 | while IFS='' read LINE # Preserve leading/trailing whitespace
do
# Every stdout and (copied) stderr line
echo "[$(date --iso-8601=second)] $LINE"
done >> "$OUTPUT_TMPFILE"
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