Re: [PATCH 2/2] git-log (internal): more options.

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Linus Torvalds <torvalds@xxxxxxxx> writes:

> Most helpers that want a list of commits probably want the printing 
> options too, and the ones that do not probably simply don't care (ie if 
> they silently pass a "--pretty=raw" without it affecting anything, who 
> really cares?)

Perhaps (meaning, agree in general but not 100% convinced and
haven't made up my mind yet).

> I can actually imagine using "--parents" as a way of parsing both the 
> commit log and the history. Of course, any such use is likely in a script, 
> at which point the script probably doesn't actually want "git log", but 
> just a raw "git-rev-list".

Yes, that is exactly why I did not see why "log viewer" wants --parents.

> To me, the question whether a flag would be parsed in the "revision.c" 
> library or in the "rev-list.c" binary was more a question of whether that 
> flag makes sense for other things than just "git log". 

Good to know we are in agreement (iow, I wasn't totally off the
mark) that revision.c should handle things that are common.
That means:

 * --bisect and --parents are for scripted use only and do not
   concern log viewer, so we would leave them in rev-list.

 * --header is good for anything that shows more than one
   record, so it may be worthwhile to have it in generic.

> For example, "git whatchanged" and "git diff" could both use 
> setup_revision(), although "git diff" wouldn't actually _walk_ the 
> revisions (it would just look at the "revs->commits" list to see what was 
> passed in).
>
> "git whatchanged" would obviously take all the same flags "git log" does, 
> and "git diff" could take them and just test the values for sanity (ie 
> error out if min/max_date is not -1, for example).

Perhaps.

> "git show" is like a "git-whatchanged" except it wouldn't walk the diffs 
> (I considered adding a "--nowalk" option to setup_revisions(), which would 
> just suppress the "add_parents_to_list()" entirely)

Umm.  The current "git show -4" walks and I find the behaviour
useful.  They are the same program with different defaults.

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