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bash-backtrace.sh
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bash-backtrace.sh
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# Add python-like backtraces to your bash shell scripts!
#
# Use like so:
#
# #!/bin/bash
# set -eu
# source "$password_vault/bin/lib/bash-backtrace.sh"
# ...
#
if [ -z "${BASH_VERSION-}" ]; then
echo >&2 "Error: this script only works in bash"
return 1 || exit 1
fi
set -E
# References:
# - https://gist.github.com/ryo1kato/3102982
# - https://gist.github.com/kergoth/6395873
bash_backtrace() {
local ret=$?
local frame
local FRAMES=${#BASH_SOURCE[@]}
echo >&2 "Traceback (most recent call last):"
for ((frame=FRAMES-2; frame >= 0; frame--)); do
local lineno=${BASH_LINENO[frame]}
printf >&2 ' File "%s", line %d, in %s\n' \
"${BASH_SOURCE[frame+1]}" "$lineno" "${FUNCNAME[frame+1]}"
sed >&2 -n "${lineno}s/^[ ]*/ /p" "${BASH_SOURCE[frame+1]}"
done
printf >&2 "Exiting with status %d\n" "$ret"
}
trap bash_backtrace ERR