lkml.org 
[lkml]   [2006]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [SCRIPT] chomp: trim trailing whitespace
Jeff Garzik wrote:
>
> Attached to this email is chomp.pl, a Perl script which removes trailing
> whitespace from several files. I've had this for years, as trailing
> whitespace is one of my pet peeves.
>
> Now that git-applymbox complains loudly whenever a patch adds trailing
> whitespace, I figured this script may be useful to others.
>

This is the script I use for the same purpose. It's a bit more
sophisticated, in that it detects and avoids binary files, and doesn't
throw an error if it encounters a directory (which can happen if you
give it a wildcard.)

-hpa
#!/usr/bin/perl
#
# Clean a text file of stealth whitespace
#

use bytes;

$name = 'cleanfile';

foreach $f ( @ARGV ) {
print STDERR "$name: $f\n";
if (! -f $f) {
print STDERR "$f: not a file\n";
next;
}
if (!open(FILE, '+<', $f)) {
print STDERR "$name: Cannot open file: $f: $!\n";
next;
}
binmode FILE;

# First, verify that it is not a binary file
$is_binary = 0;

while (read(FILE, $data, 65536) > 0) {
if ($data =~ /\0/) {
$is_binary = 1;
last;
}
}
if ($is_binary) {
print STDERR "$name: $f: binary file\n";
next;
}
seek(FILE, 0, 0);

@blanks = ();
@lines = ();

while ( defined($line = <FILE>) ) {
$line =~ s/[ \t\r\n]*$/\n/;
if ( $line eq "\n" ) {
push(@blanks, $line);
} else {
push(@lines, @blanks);
push(@lines, $line);
@blanks = ();
}
}
# Any blanks at the end of the file are discarded

seek(FILE, 0, 0);
print FILE @lines;

if ( !defined($where = tell(FILE)) ||
!truncate(FILE, $where) ) {
die "$name: Failed to truncate modified file: $f: $!\n";
}
close(FILE);
}
\
 
 \ /
  Last update: 2006-05-27 06:20    [from the cache]
©2003-2011 Jasper Spaans