Re: [PATCH] graph API: Added logic for colored edges

Allan Caffee [off-list ref] writes:

The problem with making it an index into the column_colors array is that
we don't have a convenient place to test whether the user actually wants
color.  We can't do it in strbuf_write_column because AFAIK there's no
way to get the rev-info to test the options.  I suppose we could define
GIT_NOT_A_COLOR to -1 and just set the color to that when we don't
intend to use color.  (Either way I should probably change that to an
unsigned short.)  What do you think?

Sounds sensible.