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* Cleanups.

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This commit is contained in:
Eelco Dolstra 2006-09-19 14:27:28 +00:00
parent 9488ae7357
commit 07cec27848
1 changed files with 12 additions and 19 deletions
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31
scripts/optimise-store.pl
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@ -2,23 +2,23 @@
use strict; use strict;
{ my $ofh = select STDOUT; #{ my $ofh = select STDOUT;
$| = 1; # $| = 1;
select $ofh; # select $ofh;
} #}
#my @paths = ("/nix/store/d49mc94xwwd7wf1xzfh4ch4cypn0ajjr-glibc-2.3.6", "/nix/store/1mgfgy3ga4m9z60747s0yzxl0g6w5kxz-glibc-2.3.6");
my @paths = ("/nix/store"); my @paths = ("/nix/store");
my $tmpfile = "/tmp/nix-optimise-hash-list"; my $hashList = "/tmp/nix-optimise-hash-list";
#my $tmpfile = "/data/nix-optimise-hash-list";
system("find @paths -type f -print0 | xargs -0 md5sum -- > $tmpfile") == 0 system("find @paths -type f -print0 | xargs -0 md5sum -- > $hashList") == 0
or die "cannot hash store files"; or die "cannot hash store files";
system("sort $tmpfile > $tmpfile.sorted") == 0 system("sort $hashList > $hashList.sorted") == 0
or die "cannot sort list"; or die "cannot sort list";
open LIST, "<$tmpfile.sorted" or die; open LIST, "<$hashList.sorted" or die;
my $prevFile; my $prevFile;
my $prevHash; my $prevHash;
@ -29,20 +29,16 @@ my $savedSpace = 0;
my $files = 0; my $files = 0;
while (<LIST>) { while (<LIST>) {
# print "D";
/^([0-9a-f]*)\s+(.*)$/ or die; /^([0-9a-f]*)\s+(.*)$/ or die;
my $curFile = $2; my $curFile = $2;
my $curHash = $1; my $curHash = $1;
# print "A";
my $fileSize = (stat $curFile)[7]; my $fileSize = (stat $curFile)[7];
# print "B";
# my $fileSize = 1;
$totalSpace += $fileSize; $totalSpace += $fileSize;
if (defined $prevHash && $curHash eq $prevHash) { if (defined $prevHash && $curHash eq $prevHash) {
# print "$curFile = $prevFile\n"; print "$curFile = $prevFile\n";
$savedSpace += $fileSize; $savedSpace += $fileSize;
@ -51,13 +47,10 @@ while (<LIST>) {
$prevHash = $curHash; $prevHash = $curHash;
} }
print "." if ($files++ % 100 == 0); # print "." if ($files++ % 100 == 0);
#print ".";
# print "C";
} }
print "\n"; #print "\n";
print "total space = $totalSpace\n"; print "total space = $totalSpace\n";
print "saved space = $savedSpace\n"; print "saved space = $savedSpace\n";