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@ -1,14 +1,17 @@ |
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#!/usr/bin/env bash |
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# CONSTANTS |
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BASH_BACK_ERROR=$(mktemp -t "$(basename $0).XXXXXXXX" --tmpdir=/run/user/$(id -u)) |
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BASH_BACK_DEBUG=${BASH_BACK_DEBUG:-false} |
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MIAOU_BASH_ERROR=$(mktemp -t "$(basename "$0").XXXXXXXX" --tmpdir="/run/user/$(id -u)") |
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MIAOU_BASH_DEBUG=${MIAOU_BASH_DEBUG:-false} |
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readonly MIAOU_BASH_ERROR MIAOU_BASH_DEBUG |
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# FUNCTIONS |
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function on_return { |
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# regex does not work here unfortunately! |
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if [[ "${BASH_COMMAND}" == 'return '* ]]; then |
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code=$(echo "${BASH_COMMAND}" | cut -d' ' -f2) # regex does not work here unfortunately! thus use of basic cut |
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code=$(echo "${BASH_COMMAND}" | cut -d' ' -f2) |
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if [[ -n "$code" ]] && [[ "$code" -ne 0 ]]; then |
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trap - DEBUG |
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>&2 echo "${BASH_SOURCE[2]}: line ${BASH_LINENO[0]}: return $code from ${FUNCNAME[1]}" |
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@ -16,12 +19,12 @@ function on_return { |
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fi |
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} |
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# overridden function which permits stacktracing of original `return` statement |
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# overridden function which permits backtracing of original `return` statement |
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function exit { |
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code=${1:-0} |
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>&2 echo "${BASH_SOURCE[2]}:${BASH_LINENO[0]} exit $@" |
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# >&2 echo "${BASH_SOURCE[2]}: line ${BASH_LINENO[0]}: exit $@" |
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builtin exit $code |
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>&2 echo "${BASH_SOURCE[2]}:${BASH_LINENO[0]} exit $code" |
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builtin exit "$code" |
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} |
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function on_exit { |
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@ -31,19 +34,19 @@ function on_exit { |
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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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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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unset 'stack_sources[0]' |
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unset 'stack_sources[-1]' |
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if [[ "${stack_functions[1]}" == exit && "${stack_sources[1]}" == "${BASH_SOURCE[0]}" ]]; then |
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# the exit case scenario |
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unset stack_functions[1] |
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unset stack_sources[1] |
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unset stack_lines[0] |
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unset 'stack_functions[1]' |
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unset 'stack_sources[1]' |
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unset 'stack_lines[0]' |
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fi |
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stack_lines=("${stack_lines[@]}") |
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@ -53,9 +56,9 @@ function on_exit { |
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stack_summary=() |
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if [[ $code -gt 0 ]]; then |
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last_error=$(tail -n1 $BASH_BACK_ERROR) |
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last_error=$(tail -n1 "$MIAOU_BASH_ERROR") |
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last_source=${stack_sources[0]} |
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last_source=${last_source//./"\."} # replace . by \. |
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last_source=${last_source//./"\."} # replace '.' with '\.' |
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regex1="^$last_source: line ([0-9]+): (.*)\$" |
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regex2="^$last_source:([0-9]+) (.*)\$" |
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if [[ "$last_error" =~ $regex1 || "$last_error" =~ $regex2 ]]; then |
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@ -85,57 +88,59 @@ function on_exit { |
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stack_detail=$(printf "\t%30s\t%s\n" "${stack_sources[$i]}:${stack_lines[$i]}" "${stack_functions[$i]}") |
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stack_summary+=("$stack_detail") |
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done |
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>&4 dump_stderr true |
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dump_summary |
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dump_failure |
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else |
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>&4 dump_stderr false |
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dump_success |
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fi |
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cleanup |
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builtin exit $code |
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builtin exit "$code" |
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} |
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function dump_summary { |
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$BASH_BACK_DEBUG && >/dev/tty echo '---stacktrace---' |
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function dump_failure { |
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dump_stderr true |
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$MIAOU_BASH_DEBUG && >/dev/tty echo '---stacktrace---' |
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for i in "${stack_summary[@]}"; do |
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>&4 echo -e "$i" |
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done |
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cleanup |
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} |
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function dump_stderr { |
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last_trim=${1:-false} |
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mapfile -t tmp_error <$BASH_BACK_ERROR |
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$last_trim && unset tmp_error[-1] && tmp_error=("${tmp_error[@]}") |
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mapfile -t tmp_error <"$MIAOU_BASH_ERROR" |
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$last_trim && unset 'tmp_error[-1]' && tmp_error=("${tmp_error[@]}") |
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if [[ "${#tmp_error[@]}" -gt 0 ]]; then |
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$BASH_BACK_DEBUG && >/dev/tty echo '---stderr---' |
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$MIAOU_BASH_DEBUG && >/dev/tty echo '---stderr---' |
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for i in "${tmp_error[@]}"; do |
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echo -e "$i" |
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>&4 echo -e "$i" |
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done |
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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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function dump_success { |
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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 $BASH_BACK_ERROR |
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rm "$MIAOU_BASH_ERROR" |
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} |
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# MAIN |
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set -TEue -o pipefail |
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[[ $# -ne 1 ]] && >&2 echo 'ERROR: script expected!' && builtin exit 1 |
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[[ $# -lt 1 ]] && >&2 echo 'ERROR: script expected!' && builtin exit 1 |
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trap 'on_exit $?' ERR TERM INT EXIT |
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trap 'on_return' DEBUG |
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BASH_ARGV0="$1" && shift # to pretend script runs by itself |
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# magic FD |
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exec 3> >(tee $BASH_BACK_ERROR >/dev/null) 4>/dev/stderr |
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# magic FD + delayed tee => /dev/fd/3 means delayed stderr, /dev/fd/4 remains original stderr |
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exec 3> >(tee "$MIAOU_BASH_ERROR" >/dev/null) 4>/dev/stderr |
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$BASH_BACK_DEBUG && >/dev/tty echo '---stdout---' |
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source $1 2>&3 |
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success |
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$MIAOU_BASH_DEBUG && >/dev/tty echo '---stdout---' |
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# shellcheck source=/dev/null |
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source "$BASH_ARGV0" 2>&3 |
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dump_success |
pvincent