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#!/usr/bin/env perl -w
use strict;
my $filename = $ARGV[0];
if (!$filename) {
print "Usage: longlines.pl <filename> [length]\n";
exit(1);
}
# Set a default maximum line length.
my $max_length = $ARGV[1] || 80;
my @lines = ();
my $line_num = 0;
open(HANDLE, "<", $filename) or die "Cannot open $filename\n";
# Read the file and track the lines with length > $max_length.
while (<HANDLE>) {
$line_num++;
# Subtract one because the newline doesn't count toward the
# length.
if (length($_) - 1 > $max_length) {
push @lines, $line_num;
}
}
# If more than five long lines were found, truncate to five and
# indicate that others were present, too.
if (@lines > 5) {
@lines = @lines[0..4];
push @lines, "and others";
}
# If any long lines were found, notify and exit(1); otherwise,
# exit(0).
if (@lines) {
print $filename." (line".((@lines > 1) ? "s" : "")." ".
join(", ", @lines)." exceed".((@lines == 1) ? "s" : "").
" length $max_length)\n";
exit(1);
} else {
exit(0);
}
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