def link(self, src, dst, label=None):
    dst = self._normalize(dst)
    self._tag(dst, label)
    self._ensure_parent(dst)
    abs_src = src
    abs_dst = os.path.join(self.chroot, dst)
    safe_copy(abs_src, abs_dst, overwrite=False)
    # TODO: Ensure the target and dest are the same if the file already exists.
Hard link file from ``src`` to ``chroot/dst`` with optional label.
dataset/ETHPy150Open pantsbuild/pex/pex/common.py/Chroot.link