ht

#!/bin/bash
# ht is a handy replacement for head that aligns columns in a tab separated file
# Written by Dennis Gascoigne at some point in 2010

NROWS="10"
SHOWALL="NO"
while getopts "n:a" opt
do
    case $opt in
	(a) SHOWALL="YES";;
	(n) NROWS=$OPTARG;;
	(*) echo "$0: error - unrecognized option $1" >&2; exit 1;;
	esac
done

INFILE=${@:OPTIND}

#[ "$INFILE" = "" ] && echo "ERROR: No input file specified use - to take from stdin" >&2 && exit 1


[ ! -f $INFILE ] && echo "ERROR: Input file does not exist" >&2 && exit 1
if [ "$SHOWALL" = "YES" ]; then
	cat $INFILE | awk 'BEGIN{FS="\t";OFS="\t"}{if(NR==1){if (NF>=1) {printf("1")};if (NF>1){for (i=2;i<=NF;i++){printf("\t%s",i)}};printf("\n")};print $0}' | column -t -s $'\t'
else
	head -${NROWS} $INFILE | awk 'BEGIN{FS="\t";OFS="\t"}{if(NR==1){if (NF>=1) {printf("1")};if (NF>1){for (i=2;i<=NF;i++){printf("\t%s",i)}};printf("\n")};print $0}' | column -t -s $'\t'
fi