tg-create.sh: use ensure_clean_tree only when absolutely necessary
commit51ca13f0b3b7d93284d07008daa6ea7f875ed6c3
authorKyle J. McKay <mackyle@gmail.com>
Thu, 19 Nov 2015 19:14:39 +0000 (19 11:14 -0800)
committerKyle J. McKay <mackyle@gmail.com>
Thu, 19 Nov 2015 19:14:39 +0000 (19 11:14 -0800)
tree78b20542a3a45d4073e5a5c721142d53bd7d7353
parent704d7a7bfe03c0f44bdad399231285fbaf6f2fdc
tg-create.sh: use ensure_clean_tree only when absolutely necessary

Avoid ensure_clean_tree if there's only one dep and the dep's tree
is the same as HEAD's tree.  That's the most permissive check possible.

Signed-off-by: Kyle J. McKay <mackyle@gmail.com>
tg-create.sh