tabular

#!/usr/bin/env bash
set -eu

sortArgs="$@"

if [[ "$sortArgs" == "-h" || "$sortArgs" == "--help" ]]; then
    echo >&2 "Usage: tabular [sortFlags]"
    echo >&2 ""
    echo >&2 "For a full list of unix sort flags see 'man sort'"
    echo >&2 ""
    echo >&2 "Recommended for use with ducttape summary mode. For example:"
    echo >&2 "  $ ducttape experiments.tape --plan tiny summary > summary.txt"
    echo >&2 "  $ tabular -k2,2d -k1,1g summary.txt"
    echo >&2 ""
    echo >&2 "  This would create a summary of the 'tiny' plan and write it so summary.txt,"
    echo >&2 "  provided that you had previously executed the 'tiny' plan."
    echo >&2 "  tabular would then sort the second column using dictionary order"
    echo >&2 "  and then sort the first column using numeric order"
    echo >&2 "  Note: It is important to use the n,n notation or else sort will try"
    echo >&2 "  to sort from the n-th column through the end of the line, which can"
    echo >&2 "  lead to unintuitive results"
    exit 1
fi

(
  (
    while read line; do
      if [[ "$line" == "#"* ]]; then
        echo >&2 $line
      else
        echo $line
      fi
    done
  ) | (     # Sort and columnify stdout
    read header
    echo $header
    LC_ALL=c sort $sortArgs 
  ) | column -t
) &>/dev/stdout # Redirect both to same stream