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bash defer function - just like go's defer()
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| if [[ -z "$BASHPID" ]]; then | |
| echo "your bash is too old" >&2 | |
| exit 1 | |
| fi | |
| deferred=() | |
| deferred_pid= | |
| run_deferred() { | |
| if [[ "$deferred_pid" != $BASHPID ]]; then | |
| # we are a subshell, don't execute statements created in parent | |
| return | |
| fi | |
| set +e | |
| for (( i=${#deferred[@]} - 1; i >= 0; i-- )); do | |
| eval "${deferred[i]}" | |
| done | |
| } | |
| defer1() { | |
| if [[ "$deferred_pid" != $BASHPID ]]; then | |
| # $deferred was inherited from a parent (we are a subshell). re-initialize it | |
| deferred=() | |
| deferred_pid=$BASHPID | |
| trap run_deferred EXIT | |
| fi | |
| deferred+=( "$1" ) | |
| } | |
| defer() { | |
| defer1 "$(printf '%q ' "$@")" | |
| } |
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