Re: [PATCH 4/4] pretty-print: add --pretty=noexpand

[Jeff King <peff@peff.net>]

On Thu, Mar 17, 2016 at 04:16:21PM -0700, Junio C Hamano wrote:

> It is reasonable for tweak the default output mode for "git log" to
> untabify the commit log message, it sometimes may be necessary to
> see the output without tab expansion.
> 
> Invent a new --pretty option to do this.  Use this to unbreak the
> test breakages, where "git shortlog" and output are tested.

Hmm. Isn't "expand tabs" orthogonal to the rest of the pretty format?
That is, couldn't one want "--pretty=fuller, but with tabs expanded"?

I don't personally care much myself, and certainly we don't need to
support "--expand-tabs" for every format until somebody actually wants
them enough to implement it. I just don't want to see us painted into a
corner where we have to support an awkward interface forever (e.g., the
way we had to retrofit the orthogonal "local" concept onto the --date
code).

E.g., start with:

  - only CMIT_FMT_MEDIUM expands tabs (and does so by default)

  - passing --no-expand-tabs suppresses this behavior

  - passing --expand-tabs is an error for now; if people care later,
    they can add support for other formats (naively this is trivial, but
    I suspect there are some corner cases around things like
    --pretty=raw, so unless somebody wants to work on it now, I don't
    think we need to).

-Peff