The name-rev command has an option --undefined (which is not documented
in git-name-rev.txt) that doesn't do anything. If you look at
builtin-name-rev.c, allow_undefined never gets set to anything but 1, I
think. In that case --undefined could be made a dummy option for
compatibility and the allow_undefined code could be ripped out.
In the same file, there's also an "else if (always)" clause that, if
allow_undefined is indeed always true, never gets run. "git-name-ref
--tags --always master" still prints "undefined" despite the --always
option. (--always is undocumented as well.)
Perhaps someone more knowledgeable should take a look at this (and maybe
write up a test case or two), I don't feel confident submitting patches
to this file.
-- Lea
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