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#!/usr/bin/env bash
# CONSTANTS
DEBUG=true
TMP_ERROR=$(mktemp -t "$(basename $0).XXXXXXXX" --tmpdir=/run/user/$(id -u))
SCRIPT=$1
# FUNCTIONS
function return {
builtin return ${1:-}
}
function exit {
code=${1:-0}
stack_lines=("${BASH_LINENO[@]}")
stack_functions=("${FUNCNAME[@]}")
stack_sources=("${BASH_SOURCE[@]}")
unset stack_lines[-1]
unset stack_lines[-1]
unset stack_functions[0]
unset stack_functions[-1]
stack_functions[-1]='<main>'
unset stack_sources[0]
unset stack_sources[-1]
stack_lines=("${stack_lines[@]}")
stack_functions=("${stack_functions[@]}")
stack_sources=("${stack_sources[@]}")
if [[ -s $TMP_ERROR ]]; then
last_error=$(tail -n1 $TMP_ERROR)
$DEBUG && >/dev/tty echo '---stderr---'
>&4 echo "ERROR $code: [$last_error]"
fi
for i in "${!stack_functions[@]}"; do
>&4 printf "\t%30s\t%s\n" "${stack_sources[$i]}:${stack_lines[$i]}" "${stack_functions[$i]}"
done
# echo "${stack_lines[@]}"
# echo "${stack_functions[@]}"
# echo "${stack_sources[@]}"
cleanup ${code}
}
function success {
if [[ -s $TMP_ERROR ]]; then
$DEBUG && >/dev/tty echo '---stderr---'
>&2 cat $TMP_ERROR
fi
cleanup 0
}
function cleanup {
code=${1:-0}
$DEBUG && >/dev/tty echo "---exit $1---"
trap - ERR TERM INT EXIT
rm $TMP_ERROR
exec 3>&- 4>&-
builtin exit $code
}
# MAIN
set -TEue -o pipefail
trap 'exit $?' ERR TERM INT EXIT
# magic FD
exec 3>$TMP_ERROR 4>/dev/stderr
$DEBUG && >/dev/tty echo '---stdout---'
source $SCRIPT 2>&3
success