v3.1: make-authors.pl script not compatible with being a submodule. #6623
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Refs #6614
make-authors.pl checks that .git exists and is a directory before
getting the git log - but when a repo is checked out as a submodule of a
larger repository, .git is not a directory, it's just a text file. This
can cause make-authors.pl to terminate inappropriately.
Author: Michael Heinz [email protected]
Signed-off-by: Michael Heinz [email protected]
(cherry picked from commit 0a8fa54)