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trap death ERR
FILE_HASH=$(git hash-object -t blob -w $FILE)
TREE_HASH=$(echo "100755 blob $FILE_HASH	$FILE" | git mktree)
if PARENT_HASH=$(git rev-parse --verify refs/heads/$BRANCH 2> /dev/null); then
    PARENTS="-p $PARENT_HASH"
else
    PARENT_HASH="0000000000000000000000000000000000000000"
fi
COMMIT_HASH=$(git commit-tree $PARENTS -m "version $VERSION" $TREE_HASH)
git update-ref refs/heads/$BRANCH $COMMIT_HASH $PARENT_HASH
echo "Successfully updated $BRANCH branch."