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cedws/defer.sh

Last active June 23, 2023 13:26
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Go-like defer 'keyword' for shell
Raw
defer.sh
#!/bin/sh
DEFER=
defer() {
DEFER="$*; ${DEFER}"
trap "{ $DEFER }" EXIT
}
@charles-dyfis-net
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charles-dyfis-net commented Jun 21, 2023 •
edited

As an addendum (since the suggestions I made above are applicable either to bash 5+ or shells with the ksh93 printf %q extension such as bash or zsh):

For folks who want both safety and compatibility with /bin/sh, I'd suggest encapsulating cleanup code in functions (with no arguments -- getting content from variables only) and then passing the names of those functions to defer. rm_tmp_ab() { rm -vf "$TEMP" "/tmp/a b"; }; defer rm_tmp_ab f/e.

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