+++ /dev/null
-#!/bin/bash
-# Copyright (C) 2019 Ian Kelling
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-# meant to be sourced. copy/pasted from https://iankelling.org/git/?p=errhandle;a=summary
-
-# Commentary: Bash stack trace and error handling functions. This file
-# is meant to be sourced. It loads some functions which you may want to
-# call manually (see the comments at the start of each one), and then
-# runs err-catch. See the README file for a slightly longer explanation.
-
-
-#######################################
-# Print stack trace
-#
-# usage: err-bash-trace [MESSAGE]
-#
-# This function is called by the other functions which print stack
-# traces.
-#
-# It does not show function args unless you first run:
-# shopt -s extdebug
-# which err-catch & err-print do for you.
-#
-# MESSAGE Message to print just before the stack trace.
-#
-# _frame_start Optional variable to set before calling. The frame to
-# start printing on. default=1. Useful when printing from
-# an ERR trap function to avoid printing that function.
-#######################################
-err-bash-trace() {
- local -i argc_index=0 frame i start=${_frame_start:-1}
- local source
- if [[ $1 ]]; then
- printf "%s\n" "$1"
- fi
- for ((frame=0; frame < ${#FUNCNAME[@]}; frame++)); do
- argc=${BASH_ARGC[frame]}
- argc_index+=$argc
- ((frame < start)) && continue
- if (( ${#BASH_SOURCE[@]} > 1 )); then
- source="${BASH_SOURCE[frame]}:${BASH_LINENO[frame-1]}:"
- fi
- printf " from %sin \`%s" "$source" "${FUNCNAME[frame]}"
- if shopt extdebug >/dev/null; then
- for ((i=argc_index-1; i >= argc_index-argc; i--)); do
- printf " %s" "${BASH_ARGV[i]}"
- done
- fi
- echo \'
- done
- return 0
-}
-
-#######################################
-# On error print stack trace and exit
-#
-# Globals:
-# errcatch-cleanup If set, this command will run just before exiting.
-#######################################
-err-catch() {
- set -E; shopt -s extdebug
- _err-trap() {
- err=$?
- exec >&2
- set +x
- local msg="${BASH_SOURCE[1]}:${BASH_LINENO[0]}: \`$BASH_COMMAND' returned $err"
- if (( ${#FUNCNAME[@]} > 2 )); then
- local _frame_start=2
- err-bash-trace "$msg"
- else
- echo "$msg"
- fi
- set -e # err trap does not work within an error trap
- if type -t errcatch-cleanup >/dev/null; then
- errcatch-cleanup
- fi
- echo "$0: exiting with status $err"
- exit $err
- }
- trap _err-trap ERR
- set -o pipefail
-}
-
-
-#######################################
-# For interactive shells: on error, print stack trace and return
-#
-# Globals:
-# err_catch_ignore Array containing glob patterns to test against filenames to ignore
-# errors from. Initialized to ignore bash-completion scripts on debian
-# based systems.
-# _err_func_last Used internally.
-# _err_catch_err Used internally.
-# _err_catch_i Used internally.
-# _err_catch_ignore Used internally.
-#
-# misc: All shellcheck disables for this function are false positives.
-#######################################
-# shellcheck disable=SC2120
-err-catch-interactive() {
- err_catch_ignore=(
- '/etc/bash_completion.d/*'
- )
- # shellcheck disable=SC2034
- declare -i _err_func_last=0
- set -E; shopt -s extdebug
- # shellcheck disable=SC2154
- trap '_err_catch_err=$? _trap_bc="$BASH_COMMAND"
- _err_catch_ignore=false
- for _err_catch_i in "${err_catch_ignore[@]}"; do
- if [[ ${BASH_SOURCE[0]} == $_err_catch_i ]]; then
- _err_catch_ignore=true
- break
- fi
- done
- if ! $_err_catch_ignore; then
- if (( ${#FUNCNAME[@]} > _err_func_last )); then
- echo ERR: \`$_trap_bc'"\'"' returned $_err_catch_err
- fi
- _err_func_last=${#FUNCNAME[@]}
- if (( _err_func_last )); then
- printf " from %s:%s:in \`%s" "${BASH_SOURCE[0]}" "$(declare -F "${FUNCNAME[0]}"|awk "{print \$2}")" "${FUNCNAME[0]}"
- if shopt extdebug >/dev/null; then
- for ((_err_catch_i=${BASH_ARGC[0]}-1; _err_catch_i >= 0; _err_catch_i--)); do
- printf " %s" "${BASH_ARGV[_err_catch_i]}"
- done
- fi
- echo '"\'"'
- return $_err_catch_err
- fi
- fi' ERR
- set -o pipefail
-}
-
-
-#######################################
-# Undoes err-catch/err-catch-interactive
-#######################################
-err-allow() {
- shopt -u extdebug
- set +E +o pipefail
- trap ERR
-}
-
-#######################################
-# On error, print stack trace
-#######################################
-err-print() {
- # help: on errors: print stack trace
- #
- # This function depends on err-bash-trace.
-
- set -E; shopt -s extdebug
- _err-trap() {
- err=$?
- exec >&2
- set +x
- echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]}: \`$BASH_COMMAND' returned $err"
- err-bash-trace 2
- }
- trap _err-trap ERR
- set -o pipefail
-}
-
-
-#######################################
-# Print stack trace and exit
-#
-# Use this instead of the exit command to be more informative.
-#
-# usage: err-exit [EXIT_CODE] [MESSAGE]
-#
-# EXIT_CODE Default is 1.
-# MESSAGE Print MESSAGE to stderr. If only one of EXIT_CODE
-# and MESSAGE is given, we consider it to be an
-# exit code if it is a number.
-#######################################
-err-exit() {
- exec >&2
- code=1
- if [[ "$*" ]]; then
- if [[ ${1/[^0-9]/} == "$1" ]]; then
- code=$1
- if [[ $2 ]]; then
- printf '%s\n' "$2" >&2
- fi
- else
- printf '%s\n' "$0: $1" >&2
- fi
- fi
- echo "${BASH_SOURCE[1]}:${BASH_LINENO[0]}"
- err-bash-trace 2
- echo "$0: exiting with code $code"
- exit $err
-}
-
-# We want this more often than not, so run it now.
-if [[ $- == *i* ]]; then
- err-catch-interactive
-else
- err-catch
-fi
iankelling.org / git / automated-distro-installer / blobdiff