Simplify merges even more aggressively.

If any one of the parents is the same as the current one, then clearly the
other parent branch isn't important, so throw it away entirely.

Can't remember why I didn't do this before, but if I rediscover it, it
definitely needs a unit test.

diff --git a/git-subtree.sh b/git-subtree.sh
index 90e22ad8be3952e5ef77492cb46a8850b61c10c6..e2e47f82ac9c86035d9ed9ab84a24e8bc7c7626e 100755 (executable)
--- a/git-subtree.sh
+++ b/git-subtree.sh
@@ -286,7 +286,7 @@ copy_or_skip()
                fi
        done
        
-       if [ -n "$identical" -a -z "$nonidentical" ]; then
+       if [ -n "$identical" ]; then
                echo $identical
        else
                copy_commit $rev $tree "$p" || exit $?