forked from lix-project/lix
70 lines
1.4 KiB
Perl
70 lines
1.4 KiB
Perl
|
#! /usr/bin/perl -w
|
||
|
|
|
||
|
|
use strict;
|
||
|
|
|
||
|
|
{ my $ofh = select STDOUT;
|
||
|
|
$| = 1;
|
||
|
|
select $ofh;
|
||
|
|
}
|
||
|
|
|
||
|
|
#my @paths = ("/nix/store/caef3a49150506d233f474322a824e50-glibc-2.3.3", "/nix/store/a8a9d585d1ad4b1bc911be7743b3b996-glibc-2.3.3");
|
||
|
|
my @paths = ("/nix/store");
|
||
|
|
|
||
|
|
my $tmpfile = "/tmp/nix-optimise-hash-list";
|
||
|
|
#my $tmpfile = "/data/nix-optimise-hash-list";
|
||
|
|
|
||
|
|
system("find @paths -type f -print0 | xargs -0 md5sum -- > $tmpfile") == 0
|
||
|
|
or die "cannot hash store files";
|
||
|
|
|
||
|
|
system("sort $tmpfile > $tmpfile.sorted") == 0
|
||
|
|
or die "cannot sort list";
|
||
|
|
|
||
|
|
open LIST, "<$tmpfile.sorted" or die;
|
||
|
|
|
||
|
|
my $prevFile;
|
||
|
|
my $prevHash;
|
||
|
|
|
||
|
|
my $totalSpace = 0;
|
||
|
|
my $savedSpace = 0;
|
||
|
|
|
||
|
|
my $files = 0;
|
||
|
|
|
||
|
|
while (<LIST>) {
|
||
|
|
# print "D";
|
||
|
|
/^([0-9a-f]*)\s+(.*)$/ or die;
|
||
|
|
my $curFile = $2;
|
||
|
|
my $curHash = $1;
|
||
|
|
|
||
|
|
# print "A";
|
||
|
|
my $fileSize = (stat $curFile)[7];
|
||
|
|
# print "B";
|
||
|
|
# my $fileSize = 1;
|
||
|
|
$totalSpace += $fileSize;
|
||
|
|
|
||
|
|
if (defined $prevHash && $curHash eq $prevHash) {
|
||
|
|
|
||
|
|
# print "$curFile = $prevFile\n";
|
||
|
|
|
||
|
|
$savedSpace += $fileSize;
|
||
|
|
|
||
|
|
} else {
|
||
|
|
$prevFile = $curFile;
|
||
|
|
$prevHash = $curHash;
|
||
|
|
}
|
||
|
|
|
||
|
|
print "." if ($files++ % 100 == 0);
|
||
|
|
#print ".";
|
||
|
|
|
||
|
|
# print "C";
|
||
|
|
}
|
||
|
|
|
||
|
|
print "\n";
|
||
|
|
|
||
|
|
print "total space = $totalSpace\n";
|
||
|
|
print "saved space = $savedSpace\n";
|
||
|
|
my $savings = ($savedSpace / $totalSpace) * 100.0;
|
||
|
|
print "savings = $savings %\n";
|
||
|
|
|
||
|
|
|
||
|
|
close LIST;
|