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| #!/usr/bin/env bash | |
| set -Eeuo pipefail | |
| IFS=$'\n\t' | |
| deferred=(true) | |
| run_deferred() { | |
| local status="$1" | |
| abort() { | |
| if [ "$status" != 0 ]; then | |
| exit "$status" | |
| fi | |
| } | |
| for cmd in "${deferred[@]}"; do | |
| eval "$cmd" || abort | |
| done | |
| unset -f abort | |
| } | |
| trap 'run_deferred $?' EXIT | |
| defer() { | |
| local IFS=' ' | |
| deferred=("$*" "${deferred[@]}") | |
| } | |
| echo acquire1 | |
| defer echo release1 | |
| echo acquire2 | |
| defer echo 2esaeler \| rev | |
| echo acquire3 | |
| defer echo -n release \; echo 3 | |
| failure() { echo "aborting"; false; } | |
| defer failure | |
| echo acquire4 | |
| defer "cat <(echo -n release && bc -e '(9 / 3) + 1')" | |
| echo acquire5 | |
| defer release5 | |
| release5() { echo release5; } | |
| echo "panicking" | |
| false |
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