Re: How to replace pattern with shell command's output using matched pattern

On 04.09.21 11:15, Lifepillar wrote:
> Use case at hand: replace Unix timestamps with date/time in a log file:
>
> [1630720618] unbound[63495:0] info: 127.0.0.1 foo.bar.com AAAA IN
> [1630720618] unbound[63495:1] info: 127.0.0.1 foo.bar.com A IN
> ...
>
> The shell command I'd apply is `date -r <timestamp>`. How would you
> perform the substitution?

:%s_^\[\(\d\+\)_\="[" . systemlist("date -r " . submatch(1))[0]_

Alternatively, without using an external command:

:%s_^\[\(\d\+\)_\="[" . strftime("%c", submatch(1))_

Bye, Andreas

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