Re: [PATCH] config option core.showroot to enable showing the diff of the root commit

Peter Baumann [off-list ref]
writes:

quoted

quoted

I'm not sure if making core.showroot acting on git-diff-tree is the
right thing to do. Please check first bevore applying.

I agree that this "use --root by default" belongs to Porcelain
layer, not the plumbing.  We would probably want to do this in
the same way as we do the color in diff.c::git_diff_ui_config().

Sorry, but I don't understand. The color handling doesn't look any different
to me than the handling of the other config entrys. Did I miss something?

"git-diff-tree --color HEAD" (with explicit command line
instruction to color it) still colours its output, but "[diff]
color = auto" in ~/.gitconfig would not affect the coloring.
Hence, "git-diff-tree HEAD" with the configuration entry gives
monochrome.

"git diff HEAD" on the other hand looks at '[diff] color = auto"
and will color its output without being told on the command
line.