z40=0000000000000000000000000000000000000000

while read local_ref local_sha remote_ref remote_sha

do

if [ "$local_sha" != $z40 ]; then

if [ "$remote_sha" = $z40 ]; then

# First ancestor not found in remote

first_ancestor=$(git rev-list --topo-order --reverse "$local_sha" --not --remotes="$1" | head -n 1)

if [ -n "$first_ancestor" ]; then

# Check that the ancestor has at least one parent

git rev-list --max-parents=0 "$local_sha" | grep "$first_ancestor" > /dev/null

if [ $? -ne 0 ]; then

args="run --all-files"

else

source=$(git rev-parse "$first_ancestor"^)

args="run --origin $local_sha --source $source"

fi

fi

else

args="run --origin $local_sha --source $remote_sha"

fi

fi

done

if [ "$args" != "" ]; then

args="$args --hook-stage push"

else

# If args is empty, then an attempt to push on an empty

# changeset is being made. In this case, just exit cleanly

exit 0

fi