Previously, graph_is_interesting() did not behave quite the same way as
the code in get_revision(). As a result, it would sometimes think
commits were uninteresting, even though get_revision() would return
them. This resulted in incorrect lines in the graph output.
This change creates a get_commit_action() function, which
graph_is_interesting() and simplify_commit() both now use to determine
if a commit will be shown. It is identical to the old simplify_commit()
behavior, except that it never calls rewrite_parents().
This problem was reported by Santi Béjar. The following command
would exhibit the problem before, but now works correctly:
git log --graph --simplify-by-decoration --oneline v1.6.3.3
Previously git graph did not display the output for this command
correctly between f29ac4f and 66996ec, among other places.
Signed-off-by: Adam Simpkins <simpkins@facebook.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
