Sort CSV data.
This requires reading all of the data into memory, unless
using the -e/--external flag, which will be slower and fallback
to using disk space.
Usage:
xan sort [options] [<input>]
sort options:
--check Verify whether the file is already sorted.
-s, --select <arg> Select a subset of columns to sort.
See 'xan select --help' for the format details.
-N, --numeric Compare according to string numerical value
-R, --reverse Reverse order
-c, --count <name> Number of times the line was consecutively duplicated.
Needs a column name. Can only be used with --uniq.
-u, --uniq When set, identical consecutive lines will be dropped
to keep only one line per sorted value.
-U, --unstable Unstable sort. Can improve performance.
-p, --parallel Whether to use parallelism to improve performance.
-e, --external Whether to use external sorting if you cannot fit the
whole file in memory.
--tmp-dir <arg> Directory where external sorting chunks will be written.
Will default to the sorted file's directory or "./" if
sorting an incoming stream.
-m, --memory-limit <arg> Maximum allowed memory when using external sorting, in
megabytes. [default: 512].
-C, --cells Sort the selected cell values instead of the file itself,
without re-ordering the columns. Runs in constant memory,
can be streamed and can be used to e.g. make sure an
edgelist always has the source & target keys in a consistent
order.
Common options:
-h, --help Display this message
-o, --output <file> Write output to <file> instead of stdout.
-n, --no-headers When set, the first row will not be interpreted
as headers. Namely, it will be sorted with the rest
of the rows. Otherwise, the first row will always
appear as the header row in the output.
-d, --delimiter <arg> The field delimiter for reading CSV data.
Must be a single character.