RunCmdForNewerInput     Run a command if input files are newer than
                        outputs
abs2rel                 Remove common part of two paths, leaving
                        relative path
common_path             Find common prefix of two or more (normalised)
                        file paths
file.swap               Swap names of two files (by renaming first to a
                        temporary file)
find_extdata            Construct paths to files in the extdata folder
                        of a package
gzip.crc                Extract the CRC (32 bit hash) of a gzip file
is.gzip                 Check if a file is a gzip file
make_chunks             Split inputs into a number of chunks
makelock                Make and remove (NFS safe) lock files
ncpus                   Return number of cpus (or a default on failure)
read_nl_from_parts      Make a neuronlist object from two separate
                        files
save_nl_in_parts        Save a neuronlist object into separate data and
                        metadata parts
split_path              Split file path into individual components
                        (optionally including separators)
touch                   Use unix touch utility to change file's
                        timestamp
zipinfo                 Return information about a zip archive using
                        system unzip command
zipok                   Verify integrity of one or more zip files
