bash stacktrace

error-handler.sh

# Bash error handler. 
# On any error print full stack trace of the failure and exit with the original error code
# set -o errtrace
# inspired by https://gist.github.com/ahendrix/7030300
set -Eeuo pipefail

function errexit() {
    local err=$?
    set +o xtrace
    echo "Error in ${BASH_SOURCE[1]}:${BASH_LINENO[0]}." >&2
    echo "'${BASH_COMMAND}' exited with status $err"     >&2
    for ((i=1;i<${#FUNCNAME[@]};i++)); do
        local script=${BASH_SOURCE[$i]}
        local lineno=${BASH_LINENO[$i-1]}
        local funcname=${FUNCNAME[$i]}
        if [[ "${script:0:1}" != / && "${script:0:2}" != ~[/a-z] ]]; then
            script="${SCRIPT_DIR}/$script"
        fi
        echo "$script:$funcname:$lineno"  >&2
        awk 'NR>L-4 && NR<L+4 { printf "%-5d%3s%s\n",NR,(NR==L?">>>":""),$script }' L=$lineno $script  >&2
    done
    echo "Exiting with err:$err"  >&2
    exit $err
}

trap 'errexit' ERR