Mercurial > repos > devteam > show_beginning
comparison headWrapper.pl @ 0:ecca14446e6a
Uploaded show_beginning tarball.
| author | devteam |
|---|---|
| date | Tue, 04 Dec 2012 11:05:17 -0500 |
| parents | |
| children |
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| -1:000000000000 | 0:ecca14446e6a |
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| 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 |