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#!/usr/bin/perl -w
use strict;
# Check whether there are naming conflicts when names are truncated to
# the DOSish case-ignoring 8.3 format, plus other portability no-nos.
# The "8.3 rule" is loose: "if reducing the directory entry names
# within one directory to lowercase and 8.3-truncated causes
# conflicts, that's a bad thing". So the rule is NOT the strict
# "no filename shall be longer than eight and a suffix if present
# not longer than three".
# The 8-level depth rule is for older VMS systems that likely won't
# even be able to unpack the tarball if more than eight levels
# (including the top of the source tree) are present.
my %seen;
my $maxl = 30; # make up a limit for a maximum filename length
sub eight_dot_three {
return () if $seen{$_[0]}++;
my ($dir, $base, $ext) = ($_[0] =~ m{^(?:(.+)/)?([^/.]+)(?:\.([^/.]+))?$});
my $file = $base . ( defined $ext ? ".$ext" : "" );
$base = substr($base, 0, 8);
$ext = substr($ext, 0, 3) if defined $ext;
if (defined $dir && $dir =~ /\./) {
print "directory name contains '.': $dir\n";
}
if ($file =~ /[^A-Za-z0-9\._-]/) {
print "filename contains non-portable characters: $_[0]\n";
}
if (length $file > $maxl) {
print "filename longer than $maxl characters: $file\n";
}
if (defined $dir) {
return ($dir, defined $ext ? "$dir/$base.$ext" : "$dir/$base");
} else {
return ('.', defined $ext ? "$base.$ext" : $base);
}
}
my %dir;
if (open(MANIFEST, "MANIFEST")) {
while (<MANIFEST>) {
chomp;
s/\s.+//;
unless (-f) {
print "missing: $_\n";
next;
}
if (tr/././ > 1) {
print "more than one dot: $_\n";
next;
}
if ((my $slashes = $_ =~ tr|\/|\/|) > 7) {
print "more than eight levels deep: $_\n";
next;
}
while (m!/|\z!g) {
my ($dir, $edt) = eight_dot_three($`);
next unless defined $dir;
($dir, $edt) = map { lc } ($dir, $edt);
push @{$dir{$dir}->{$edt}}, $_;
}
}
} else {
die "$0: MANIFEST: $!\n";
}
for my $dir (sort keys %dir) {
for my $edt (keys %{$dir{$dir}}) {
my @files = @{$dir{$dir}{$edt}};
if (@files > 1) {
print "conflict on filename $edt:\n", map " $_\n", @files;
}
}
}
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