Robust, reliable and flexible paths to files below a project root. The 'root' of a project is defined as a directory that matches a certain criterion, e.g., it contains a certain regular file.
copied from cf-staging / r-rprojroot
conda install conda-forge::r-rprojrootconda install conda-forge/label/cf201901::r-rprojrootconda install conda-forge/label/cf202003::r-rprojrootconda install conda-forge/label/gcc7::r-rprojroot