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Re: [PATCH v6 4/6] blame: add config options to handle output for ignored lines

On Sun, 14 Apr 2019 at 04:45, Junio C Hamano <gitster@xxxxxxxxx> wrote:
> Wouldn't this make it impossible to tell between what's done by such
> a commit that was marked to be ignored, and what's done locally only
> in the working tree, which the users have long accustomed to see
> with the ^0*$ object name?  I think it would make a lot more sense
> to show the object name of the "ignored" commit, which would be
> recognizable by the user who fed such an object name to the command
> in the first place.  Alternatively, perhaps the same idea as replacing
> one of the hexdigits with '*' used by the other configuration can be
> applied to this as well?

I had the same objection to zeroing out hashes, but this option is off
by default so I think it's OK.
If you enable both blame.markIgnoredLines and
blame.maskIgnoredUnblamables then the hash does appear as
"*0000000000" like you suggest. I think it's appropriate that the '*'
is only added if you opt in with the markIgnoredLines option.

If you only enable blame.markIgnoredLines then the hash for
"unblamable" lines appears as e.g. "*3252488f5" - this doesn't seem
right to me because the commit *wasn't* ignored, it is in fact the
commit in which that line was added. I think '*' should denote "this
information may be inaccurate" as that's what a typical user needs to
be aware of. However given that "unblamable" lines tend to be either
empty or a single character I'm not going to insist :)