I am guessing:
https://github.com/google/codesearch/blob/master/cmd/csearch/csearch.go

On Thu, Aug 19, 2021, 13:44 Maurizio Boriani <baux@boriani.cloud> wrote:

>
> Rob Pike writes:
>
> > % cat bin/cf
> > #!/bin/sh
> >
> > csearch -n -f '\.go$' '^func (\([^)]+\) )?'$1'\('
> 
> thanks a lot! But... what's csearch?
> 
> best,
> 
> --
> Maurizio Boriani
> GPG key: 0xCC0FBF8F

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