Re: Having grep support the -o option

[Jayati Shrivastava <gaurijove@gmail.com>]

On Sat, Mar 19, 2022 at 9:49 PM Ævar Arnfjörð Bjarmason
<avarab@gmail.com> wrote:
>
>
> One thing I'd *really* like to see is the bits of %(if) %(then)
> etc. extracted from ref-filter.c into some general API other commands
> could use with strbuf_expand() and friends.
>
> I.e. if you could in addition to the strbuf_expand() callback define
> what verbs you support for "if" and the like, or have callbacks for
> their comparison functions.
>
> Then have that machinery drive the whole format expansion, which
> eventually would expand your %(some-custom-thing) via a callback.
>
> I.e. the whole "valid_atom" state machine in ref-filter.c.

So, the end goal is to design a formatting API that can be used by any
command that takes --format option? Previous interns worked on
unifying pretty.c and cat-file.c with ref-filter.c and so the next task can
be to extend "valid_atom" state machine to work with more commands.
Do you have any suggestions for new atoms/verbs I could add
support for or any such similar small exercise to start with?
+Hariom verma
+Christian Couder
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