# Convert Contents.gz files into Sleepycat db files for efficient usage of
# data
#
-# $Id$
-#
# Copyright (C) 2006 Jeroen van Wolffelaar <jeroen@wolffelaar.nl>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
use strict;
+use warnings;
use lib './lib';
+$| = 1;
+
+# Important, we want sorting and such to happen like in the C locale: binary,
+# without any fancy collation. FIXME: is this actually adequate?
+$ENV{"LC_ALL"} = 'C';
+
+my $what = $ARGV[0] ? "head -10000|" : "";
+
+# More RAM vs more disk I/O tradeoff parameters, does not change
+# functionality. True will always use more RAM at the benefit of less
+# temporary files, and is adviced when possible
+my $SORT_REVERSE_CONCURRENTLY = 1;
+
use DB_File;
use Storable;
-use Packages::Config qw( $TOPDIR $DBDIR @ARCHIVES @SUITES );
+use File::Path;
+use Packages::Config qw( $TOPDIR $DBDIR @ARCHIVES @SUITES @ARCHITECTURES );
&Packages::Config::init( './' );
-my %packages_contents = ();
-my %file_reverse = ();
-
-my @archives =( 'us'); #@ARCHIVES
-my @suites = ('stable');#@SUITES
-
-for my $archive (@archives) { for my $suite (@suites) {
-
- print "Reading $archive/$suite/i386...\n";
- open CONT, "zcat /org/ftp.debian.org/ftp/dists/stable/Contents-i386.gz|";
- while (1) {$_ = <CONT>;last if /^FILE/mo;}
- while (<CONT>) {
- my $data = "";
- my %data = ();
- chomp;
- print "Doing line $.\n" if $. % 10000 == 0;
- /^(\S+)\s+(\S+)/;
- my ($file, $value) = ($1, $2);
- $value =~ s#[^,/]+/##g;
- my @packages = split /,/, $value;
- for (@packages) {
- #$packages_contents{$_} .= "$_\0";
+
+my @archives = @ARCHIVES;
+my @suites = @SUITES;
+my @archs = @ARCHITECTURES;
+
+$DBDIR .= "/contents";
+-d $DBDIR || mkpath( $DBDIR );
+
+for my $suite (@suites) {
+ for my $arch (@archs) {
+
+ my $filelist_db = "$DBDIR/filelists_${suite}_${arch}.db";
+ my $dbtime = (stat $filelist_db)[9];
+ my %packages_contents = ();
+ my %packages_contents_nr = ();
+ my %packages_contents_lastword = ();
+
+ my $extra = "";
+ $extra = "|sort" if $SORT_REVERSE_CONCURRENTLY;
+
+ open REVERSED, "$extra>$DBDIR/reverse.tmp"
+ or die "Failed to open output reverse file: $!";
+
+ my $changed = 0;
+ for my $archive (@archives) {
+
+ my $filename = "$TOPDIR/archive/$archive/$suite/Contents-$arch.gz";
+ next unless -f $filename;
+ # Note: ctime, because mtime is set back via rsync
+ my $ftime = (stat $filename)[10];
+ next if defined $dbtime and $dbtime > $ftime;
+ print "$archive/$suite/$arch needs update\n";
+ $changed++;
+ }
+ if ($changed) {
+ for my $archive (@archives) {
+
+ my $filename = "$TOPDIR/archive/$archive/$suite/Contents-$arch.gz";
+ next unless -f $filename;
+ print "Reading $archive/$suite/$arch...\n";
+
+ open CONT, "zcat $filename|$what"
+ or die $!;
+ while (<CONT>) { last if /^FILE/mo; }
+ if (eof(CONT)) { # no header found
+ close CONT; # explicit close to reset $.
+ open CONT, "zcat $filename|$what";
}
- # Searches are case-insensitive
- $file =~ tr [A-Z] [a-z];
+ while (<CONT>) {
+ my $data = "";
+ my %data = ();
+ chomp;
+ print "Doing line ".($./1000)."k (out of approx 2.0M)\n" if $. % 250000 == 0;
+ /^(.+?)\s+(\S+)$/o;
+ my ($file, $value) = ($1, $2);
+ $value =~ s#[^,/]+/##og;
+ my @packages = split /,/, $value;
+ for (@packages) {
+ $packages_contents_nr{$_}++;
+ my $lw = $packages_contents_lastword{$_} || "\0";
+ my $i=0;
+ while (substr($file,$i,1) eq substr($lw,$i++,1)) {}
+ $i--;
+ $i = 255 if $i > 255;
+ $packages_contents{$_} .= pack "CC/a*", ($i, substr($file, $i));
+ $packages_contents_lastword{$_} = "$file\0";
+ }
+ # Searches are case-insensitive
+ (my $nocase = $file) =~ tr [A-Z] [a-z];
+ my $case = ($nocase eq $file) ? '-' : $file;
- $file_reverse{reverse $file} = join "\0", @packages;
+ print REVERSED (reverse $nocase)."\0".$case."\0".
+ (join ":$arch\0", @packages).":$arch\n";
+ }
+ close CONT;
+
+ }
+ close REVERSED;
+
+ print "Sorting reverse list if needed\n";
+ system("cd $DBDIR && sort reverse.tmp > reverse.sorted && mv reverse.{sorted,tmp}") == 0
+ or die "Failed to sort reverse"
+ unless $SORT_REVERSE_CONCURRENTLY;
+
+ print "Writing filelist db\n";
+ tie my %packages_contents_db, "DB_File", "$filelist_db.new",
+ O_RDWR|O_CREAT, 0666, $DB_BTREE
+ or die "Error creating DB: $!";
+ while (my ($k, $v) = each(%packages_contents)) {
+ $packages_contents_db{$k} = (pack "L", $packages_contents_nr{$k})
+ . $v;
+ }
+ untie %packages_contents_db;
+
+ rename("$DBDIR/reverse.tmp", "$DBDIR/reverse_${suite}_${arch}.txt");
+
+ rename("$filelist_db.new", $filelist_db);
+ system("ln", "-sf", $filelist_db, "$DBDIR/filelists_${suite}_all.db") == 0
+ or die "Oops";
}
-}}
+ }
+
+ my $go = 0;
+ my $suite_mtime = (stat "$DBDIR/reverse_$suite.db")[9];
+ for my $file (glob "$DBDIR/reverse_${suite}_*.txt") {
+ $go = 1 if not defined $suite_mtime
+ or $suite_mtime < (stat $file)[9];
+ }
+ next unless $go;
-print "Writing databases...\n";
-my %packages_contents_db;
-tie %packages_contents_db, "DB_File", "packages_contents.db.new",
- O_RDWR|O_CREAT, 0666, $DB_BTREE
- or die "Error creating DB: $!";
-while (my ($k, $v) = each(%packages_contents)) {
- $v =~ s/.$//s;
- $packages_contents_db{$k} = $v;
-}
-untie %packages_contents_db;
+ print "Merging reverse path lists for ${suite}...\n";
-my %file_reverse_db;
-tie %file_reverse_db, "DB_File", "$DBDIR/file_reverse.db.new",
- O_RDWR|O_CREAT, 0666, $DB_BTREE
+ open MERGED, "-|", "sort -m $DBDIR/reverse_${suite}_*.txt"
+ or die "Failed to open merged list";
+ open FILENAMES, ">", "$DBDIR/filenames_$suite.txt.new"
+ or die "Failed to open filenames list";
+ tie my %reverse_path_db, "DB_File", "$DBDIR/reverse_${suite}.db.new",
+ O_RDWR|O_CREAT, 0666, $DB_BTREE
or die "Error creating DB: $!";
-while (my ($x, $y) = each(%file_reverse)) {
-# $v =~ s/.$//s;
-# my $nr = $v;
-# $nr =~ s/[^\000]//g;
-# $nr = length($nr) + 1; # < number of hits
-# if ($nr > $MAX_file_reverse) {
-# $v = "\001" . $nr;
-# }
- $file_reverse_db{$x} = $y;
+
+ my $lastpath = my $lastcasepath = my $lastfile = "";
+ my %matches = ();
+ while (<MERGED>) {
+ print "Doing line ".($./1000000)."M (out of approx. 20M)\n"
+ if $. % 1000000 == 0;
+ chomp;
+ my @line = split /\0/o, $_;
+ my $revpath = shift @line;
+ my $casepath = shift @line;
+ if ($revpath ne $lastpath) {
+ # Wrap: Do useful stuff with this ($lastpath, @matches)
+ if ($lastpath ne "") {
+ my @matches;
+ while (my ($k, $v) = each %matches) {
+ push @matches, join("\0", $k, @$v);
+ }
+ $reverse_path_db{$lastpath} = join "\1", @matches;
+ %matches = ();
+ }
+ $lastpath =~ s,/.*,,o;
+ if ($lastfile ne $lastpath) {
+ $lastfile = $lastpath;
+ print FILENAMES (reverse $lastfile)."\n";
+ }
+ #
+ $lastpath = $revpath;
+ $lastcasepath = $casepath;
+ $matches{$casepath} = \@line;
+ next;
+# } elsif ($lastcasepath ne "" and $casepath ne $lastcasepath) {
+# warn reverse($revpath)." has more than one casepath: $casepath $lastcasepath\n";
+ }
+ push @{$matches{$casepath}}, @line;
+ }
+ # Note: do useful stuff here too, for out last entry. Maybe prevent this by
+ # adding a fake ultimate entry?
+ {
+ my @matches;
+ while (my ($k, $v) = each %matches) {
+ push @matches, join("\0", $k, @$v);
+ }
+ $reverse_path_db{$lastpath} = join "\1", @matches;
+ }
+
+ untie %reverse_path_db;
+ close FILENAMES;
+ close MERGED;
+
+ rename "$DBDIR/filenames_$suite.txt.new", "$DBDIR/filenames_$suite.txt";
+ rename "$DBDIR/reverse_$suite.db.new", "$DBDIR/reverse_$suite.db";
}
-untie %file_reverse_db;
-#rename("packages_contents.db.new", "packages_contents.db");
-rename("$DBDIR/file_reverse.db.new", "$DBDIR/file_reverse.db");
+# vim: set ts=4
projects / deb / packages.git / blobdiff