Recursive search for "stock" on a list of Launchpad branches

for branch in 'lp:~somebody/project/branch' 'lp:~somebody-else/project/other-branch' 'lp:~third-party/other-project/branch'; do
    rm -rf current_branch
    bzr export current_branch "$branch"
    stock_report=$(grep -ir stock current_branch)
    if [ -n "$stock_report" ]; then
        echo "$stock_report" > "$(echo $branch | tr '/' '|')"
    fi
done