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98 lines
2.3 KiB
98 lines
2.3 KiB
#!/usr/bin/env bash
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# CONSTANTS
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DEBUG=true
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TMP_ERROR=$(mktemp -t "$(basename $0).XXXXXXXX" --tmpdir=/run/user/$(id -u))
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SCRIPT=$1
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# FUNCTIONS
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# overridden function which permits stacktracing of original `return` statement
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function return {
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code=${1:-0}
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[[ $code -gt 0 ]] && >&2 echo "${BASH_SOURCE[2]}: line ${BASH_LINENO[0]}: return $@"
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builtin return $code
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}
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# overridden function which permits stacktracing of original `return` statement
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function exit {
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code=${1:-0}
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>&2 echo "${BASH_SOURCE[2]}: line ${BASH_LINENO[0]}: exit $@"
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builtin exit $code
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}
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function on_exit {
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code=${1:-0}
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>&4 dump_stderr
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stack_lines=("${BASH_LINENO[@]}")
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stack_functions=("${FUNCNAME[@]}")
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stack_sources=("${BASH_SOURCE[@]}")
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unset stack_lines[-1]
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unset stack_lines[-1]
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unset stack_functions[0]
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unset stack_functions[-1]
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stack_functions[-1]='<main>'
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unset stack_sources[0]
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unset stack_sources[-1]
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stack_lines=("${stack_lines[@]}")
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stack_functions=("${stack_functions[@]}")
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stack_sources=("${stack_sources[@]}")
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if [[ $code -gt 0 ]]; then
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$DEBUG && >/dev/tty echo '---stacktrace---'
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last_error=$(tail -n1 $TMP_ERROR)
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last_source=${stack_sources[0]}
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last_source=${last_source//./"\."} # replace . by \.
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regex="^$last_source: line ([0-9]+): (.*)$"
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if [[ "$last_error" =~ $regex ]]; then
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line=${BASH_REMATCH[1]}
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message=${BASH_REMATCH[2]}
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regex=': unbound variable$'
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[[ $code == 1 ]] && [[ "$message" =~ $regex ]] && stack_lines[0]=$line
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>&4 echo -e "ERROR $code: [$message]"
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else
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>&4 echo "ERROR $code: <undefined>"
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fi
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for i in "${!stack_functions[@]}"; do
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>&4 printf "\t%30s\t%s\n" "${stack_sources[$i]}:${stack_lines[$i]}" "${stack_functions[$i]}"
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done
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fi
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# echo "${stack_lines[@]}"
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# echo "${stack_functions[@]}"
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# echo "${stack_sources[@]}"
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cleanup
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builtin exit $code
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}
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function dump_stderr {
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if [[ -s $TMP_ERROR ]]; then
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$DEBUG && >/dev/tty echo '---stderr---'
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cat $TMP_ERROR
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fi
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}
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function success {
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>&2 dump_stderr
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cleanup
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}
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function cleanup {
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trap - ERR TERM INT EXIT
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exec 3>&- 4>&-
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rm $TMP_ERROR
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}
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# MAIN
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set -TEue -o pipefail
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trap 'on_exit $?' ERR TERM INT EXIT
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# magic FD
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exec 3>$TMP_ERROR 4>/dev/stderr
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$DEBUG && >/dev/tty echo '---stdout---'
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source $SCRIPT 2>&3
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success
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