Mercurial > repos > xuebing > sharplabtool
annotate tools/filters/headWrapper.pl @ 1:cdcb0ce84a1b
Uploaded
| author | xuebing |
|---|---|
| date | Fri, 09 Mar 2012 19:45:15 -0500 |
| parents | 9071e359b9a3 |
| children |
| rev | line source |
|---|---|
| 0 | 1 #! /usr/bin/perl -w |
| 2 | |
| 3 use strict; | |
| 4 use warnings; | |
| 5 | |
| 6 # a wrapper for head for use in galaxy | |
| 7 # headWrapper.pl [filename] [# lines to show] [output] | |
| 8 | |
| 9 die "Check arguments" unless @ARGV == 3; | |
| 10 die "Line number must be an integer\n" unless $ARGV[1]=~ m/^\d+$/; | |
| 11 | |
| 12 open (OUT, ">$ARGV[2]") or die "Cannot create $ARGV[2]:$!\n"; | |
| 13 open (HEAD, "head -n $ARGV[1] $ARGV[0]|") or die "Cannot run head:$!\n"; | |
| 14 while (<HEAD>) { | |
| 15 print OUT; | |
| 16 } | |
| 17 close OUT; | |
| 18 close HEAD; | |
| 19 |