looks like:
39 function bootstrap_venv {
40 if [[ ! -d "${PANTS_BOOTSTRAP}/${VENV_PACKAGE}" ]]
41 then
42 (
43 mkdir -p "${PANTS_BOOTSTRAP}" && \
44 staging_dir=$(tempdir "${PANTS_BOOTSTRAP}") && \
45 cd "${staging_dir}" && \
46 curl -O
https://pypi.python.org/packages/source/v/virtualenv/${VENV_TARBALL} && \
47 tar -xzf ${VENV_TARBALL} && \
48 ln -s "${staging_dir}/${VENV_PACKAGE}" "${staging_dir}/latest" && \
49 mv "${staging_dir}/latest" "${PANTS_BOOTSTRAP}/${VENV_PACKAGE}"
50 ) 1>&2
51 fi
52 echo "${PANTS_BOOTSTRAP}/${VENV_PACKAGE}"