#!/usr/bin/perl -w # # Copyright 1999 Raphaėl Hertzog # See the README file for the license # # This script takes 2 arguments on input : # - a filename listing all the packages to include # - a size-limit for each CD # use strict; my $list = shift; my $deflimit = $ENV{'SIZELIMIT'} || shift || 639631360; my $limit = $ENV{'SIZELIMIT1'} || $deflimit; my $nonfree = $ENV{'NONFREE'} || 0; my $nonus = $ENV{'NONUS'} || 0; my $local = $ENV{'LOCAL'} || 0; my $complete = $ENV{'COMPLETE'} || 0; my $exclude = $ENV{'EXCLUDE'} || "$list.exclude"; my $apt = "$ENV{'BASEDIR'}/tools/apt-selection"; my $adir = "$ENV{'APTTMP'}/$ENV{'CODENAME'}-$ENV{'ARCH'}"; my $dir = "$ENV{'TDIR'}/$ENV{'CODENAME'}-$ENV{'ARCH'}"; my $verbose = $ENV{'VERBOSE'} || 0; $| = 1; # Autoflush for debugging open(LOG, ">$dir/log.list2cds") || die "Can't write in $dir/log.list2cds !\n"; sub msg { my $level = shift; if ($verbose >= $level) { print @_; } print LOG @_; } my %included; my %excluded; my %packages; msg(0, " ====================================================================== Here are the information you've choosen for making the list : List of prefered packages : $list All packages : $complete Non-free : $nonfree Non-US : $nonus Exclude file : $exclude ====================================================================== "); # Get the informations on all packages my $oldrs = $/; $/ = ''; open(AVAIL, "$apt cache dumpavail |") || die "Can't fork : $!\n"; my ($p, $re); while (defined($_=)) { next if not m/^Package: (\S+)\s*$/m; $p = $1; $included{$p} = 0; $packages{$p}{"Package"} = $p; foreach $re (qw(Version Priority Section Filename Size MD5sum)) { (m/^$re: (\S+)\s*$/m and $packages{$p}{$re} = $1) || msg(1, "Header field '$re' missing for package '$p'.\n"); } $packages{$p}{"Depends"} = []; $packages{$p}{"Suggests"} = []; $packages{$p}{"Recommends"} = []; } close AVAIL or die "apt-cache failed : $@ ($!)\n"; $/ = $oldrs; # Get the list of excluded packages %excluded = %included; my $count_excl = 0; if (-e $exclude) { open (EXCL, "< $exclude") || die "Can't open $exclude : $!\n"; while (defined($_=)) { chomp; if (not exists $packages{$_}) { msg(1, "INIT: Package '$_' is in excluded but" . "doesn't exist. Ignored."); next; } $excluded{$_} = 'user choice'; $count_excl++; } close EXCL; } # Now exclude more packages because of the non-free and non-us rules if (not $nonfree) { foreach (grep { $packages{$_}{"Section"} =~ /non-free/ } (keys %packages)) { $excluded{$_} = 'nonfree'; $count_excl++; } } if (not $nonus) { foreach (grep { $packages{$_}{"Section"} =~ /non-US/ } (keys %packages)) { $excluded{$_} = 'nonus'; $count_excl++; } } msg(0, " Statistics : Number of packages : @{ [scalar(keys %packages)] } Number of excluded : $count_excl of @{ [scalar(keys %excluded)] } ====================================================================== "); open(STATS, "> $dir/stats.excluded") || die "Can't write in stats.excluded: $!\n"; foreach (keys %excluded) { print STATS "$_ => $excluded{$_}\n"; } close (STATS); # Browse the list of packages to include msg(0, "-- Adding standard, required, important and base packages \n" . " on the first CD ...\n"); my ($total_size, $cd_size, $size, $cd) = (0, 0, 0, 1); my %cds; # Automatically include packages listed in the status file open(STATUS, "< $adir/status") || die "Can't open status file : $!\n"; while (defined($_ = )) { next if not m/^Package: (\S+)/; $p = $1; if (not exists $packages{$p}) { msg(1, "WARNING: Package `$p' is listed in the status file " . "but doesn't exist ! (ignored) \n", " TIP: Try to generate the status file with " . "make (correct)status (after a make distclean)...\n"); next; } next if $excluded{$p}; $cd_size += $packages{$p}{"Size"}; $total_size += $packages{$p}{"Size"}; $included{$p} = 1; add_to_cd (1, [ $p ]); } close STATUS; msg(0, " Standard system already takes $cd_size bytes on the first CD.\n"); # Generate a dependency tree for each package msg(0, "-- Generating dependencies tree with apt-cache depends...\n"); my (@list) = keys %packages; while (@list) { my (@pkg) = splice(@list,0,200); open (APT, "$apt cache depends @pkg |") || die "Can't fork : $!\n"; my (@res) = (); close APT or die "« apt-cache depends » failed ... \n" . "you must have apt >= 0.3.11.1 !\n"; # Getting rid of conflicts/replaces/provides my $i = 0; my $nb_lines = scalar @res; push @res, ""; # Avoid warnings ... while ($i < $nb_lines) { if ($res[$i] !~ m/^(\S+)\s*$/) { msg(0, "UNEXPECTED: Line `$res[$i]' while parsing " . "end of deptree from '$p'\n"); } $p = $1; $i++; msg(2, " Dependency tree of `$p' ...\n"); read_depends (\$i, \@res, $p); } } # Now start to look for packages wanted by the user ... msg(0, "-- Starting to add packages to the CDs ...\n"); open (LIST, "< $list") || die "Can't open $list : $!\n"; while (defined($_=)) { chomp; next if m/^\s*$/; if (not exists $packages{$_}) { msg(1, "WARNING: '$_' does not appear to be available ... " . "(ignored)\n"); next; } next if $excluded{$_}; if ($included{$_}) { msg(3, "$_ has already been included.\n"); next; } add_package ($_, 1); } close LIST; # All requested packages have been included # But we'll continue to add if $complete was requested if ($complete) { msg(0, "-- Now we'll add all the packages not yet included ...\n"); # Try to sort them by section even if packages from # other sections will get in through dependencies # With some luck, most of them will already be here my $p; foreach $p (sort { ($packages{$a}{"Section"} cmp $packages{$b}{"Section"}) || ($a cmp $b) } grep { not ($included{$_} or $excluded{$_}) } keys %packages) { add_package ($p, 0); } } msg(0, "CD $cd will only be filled with $cd_size bytes ...\n"); # Remove old files foreach (glob("$dir/*.packages")) { unlink $_; } # Now write the lists down foreach (keys %cds) { my $count = 0; open(CDLIST, "> $dir/$_.packages") || die "Can't write in $dir/$_.packages: $!\n"; foreach (@{$cds{$_}}) { print CDLIST "$_\n"; $count++; } close CDLIST; msg(0, "CD $_ will have $count packages.\n"); } close LOG; ## END OF MAIN ## BEGINNING OF SUBS sub read_depends { my $i = shift; # Ref my $lines = shift; # Ref my $pkg = shift; # string my $types = "(?:Pre)?Depends|Suggests|Recommends|Replaces|Conflicts"; my (@dep, @rec, @sug); my ($type, $or, $elt); while ($lines->[$$i] =~ m/^\s([\s\|])($types):/) { $type = $2; $or = $1; # Get rid of replaces and conflicts ... if (($type eq "Replaces") or ($type eq "Conflicts")) { $$i++; while ($lines->[$$i] =~ m/^\s{4}/) { $$i++; } next; } # Check the kind of depends : or, virtual, normal if ($or eq '|') { $elt = read_ordepends ($i, $lines); } elsif ($lines->[$$i] =~ m/^\s\s$type: <([^>]+)>/) { $elt = read_virtualdepends ($i, $lines); } elsif ($lines->[$$i] =~ m/^\s\s$type: (\S+)/) { $elt = $1; $$i++; # Special case for packages providing not # truely virtual packages if ($lines->[$$i] =~ m/^\s{4}/) { $elt = [ $elt ]; while ($lines->[$$i] =~ m/\s{4}(\S+)/) { push @{$elt}, $1; $$i++; } } } else { msg(0, "ERROR: Unknown depends line : $lines->[$$i]\n"); foreach ($$i - 3 .. $$i + 3) { msg(0, " ", $lines->[$_]); } } $type =~ s/^Pre//; # PreDepends are like Depends for me next if dep_satisfied($elt); push @{$packages{$pkg}{$type}}, $elt; } } sub dep_satisfied { my $p = shift; if (ref $p) { foreach (@{$p}) { return 1 if $included{$p}; } } else { return $included{$p}; } return 0; } sub read_ordepends { my $i = shift; my $lines = shift; my @or = (); my ($val,$dep, $last) = ('','',0); while ($lines->[$$i] =~ m/^\s([\s\|])((?:Pre)?Depends|Suggests|Recommends): (\S+)/) { $val = $3; $last = 1 if $1 ne '|'; #Stop when no more '|' if ($val =~ m/^<.*>$/) { $dep = read_virtualdepends ($i, $lines); if (ref $dep) { push @or, @{$dep}; } else { push @or, $dep; } } else { push @or, $val; $$i++; # Hack for packages providing not a truely # virtual package while ($lines->[$$i] =~ m/^\s{4}(\S+)/) { push @or, $1; $$i++; } } last if $last; } return \@or; } sub read_virtualdepends { my $i = shift; my $lines = shift; my $virtual; my @or = (); #Check for the lines with <> if ($lines->[$$i] =~ m/^\s[\s\|]((?:Pre)?Depends|Recommends|Suggests): <([^>]+)>/) { $virtual = $2; $$i++ } # Now look at the alternatives on the following lines while ($lines->[$$i] =~ m/^\s{4}(\S+)/) { push @or, $1; $$i++; } if (@or) { return \@or; } else { return $virtual; } } sub add_package { my $p = shift; my $add_rec = shift; # Do we look for recommends/suggests msg(2, "+ Trying to add $p...\n"); if ($included{$p}) { msg(2, " Already included ...\n"); return; } # Get all dependencies (not yet included) of each package my (@dep) = (get_missing ($p)); # Stop here if apt failed if (not scalar(@dep)) { msg(2, "Can't add $p ... dependency problem.\n"); return; } msg(3, " \@dep before checklist = @dep\n"); # Check if all packages are allowed (fail if one cannot) if (not check_list (\@dep, 1)) { msg(2, "Can't add $p ... one of the package needed has " . "been refused.\n"); return; } msg(3, " \@dep after checklist = @dep\n"); if ($add_rec) { #TODO: Look for recommends & suggests (not yet included !!) add_suggests (\@dep); # Check again but doesn't fail if one of the package cannot be # installed, just ignore it (it will be removed from @dep) if (not check_list (\@dep, 0)) { msg(0, "UNEXPECTED: It shouldn't fail here !\n"); return; } msg(3, " \@dep after checklist2 = @dep\n"); } # All packages are ok, now check for the size issue $size = get_size (\@dep); # Creation of a new CD when needed if ($cd_size + $size > $limit) { msg(0, "CD $cd filled with $cd_size bytes ... ", "(limit was $limit)\n"); $cd++; $cd_size = 0; # New limit $limit = $ENV{"SIZELIMIT$cd"} || $deflimit; msg(2, "Limit for CD $cd is $limit.\n"); } $cd_size += $size; $total_size += $size; add_to_cd ($cd, \@dep); # Mark the packages included foreach (@dep) { $included{$_} = $cd; } } sub accepted { my $p = shift; return not $excluded{$p} if (exists $excluded{$p}); # Return false for a non-existant package ... msg(1, "WARNING: $p cannot be accepted, it doesn't exist ...\n"); return 0; } sub add_suggests { my $list = shift; my $p; # = shift; my @copy = @{$list}; # A copy is needed since I'll modify the array foreach $p (@copy) { add_missing($list, $packages{$p}{"Recommends"}); add_missing($list, $packages{$p}{"Suggests"}); } } sub get_missing { my $p = shift; my @list = ($p); if (not add_missing (\@list, $packages{$p}{"Depends"})) { return (); } return (@list); } # Recursive function adding to the sub add_missing { my $list = shift; my $new = shift; my @backup = @{$list}; my $ok = 1; # Check all dependencies foreach (@{$new}) { next if dep_satisfied ($_); # If it's an OR if (ref) { my $or_ok = 0; # Loop over each package in the OR foreach my $pkg (@{$_}) { next if not accepted ($pkg); # If the package is already included # then don't worry if ($included{$pkg}) { $or_ok = 1; last; } # Check we don't already have the package if (is_in ($pkg, $list)) { $or_ok = 1; last; # Otherwise try to add it } else { #Instead of doing a bad choice I'm #including all packages that do #fit to the needs push (@{$list}, $pkg); if (add_missing ($list, $packages{$pkg}{"Depends"})) { $or_ok = 1; } else { pop @{$list}; } } } $ok &&= $or_ok; # Else it's a simple dependency } else { if (not exists $packages{$_}) { msg(1, "$_ doesn't exist...\n"); $ok = 0; last; } next if $included{$_}; # Already included, don't worry next if is_in ($_, $list); push @{$list}, $_; if (not add_missing ($list, $packages{$_}{"Depends"})) { pop @{$list}; $ok = 0; } } } # If a problem has come up, then restore the original list if (not $ok) { @{$list} = @backup; } return $ok; } # Check if $value is in @{$array} sub is_in { my $value = shift; my $array = shift; my $key; foreach $key (@{$array}) { return 1 if ($key eq $value); } return 0; } # The size of a group of packages sub get_size { my $arrayref = shift; my $size = 0; foreach (@{$arrayref}) { $size += $packages{$_}{"Size"}; } return $size; } # Check a list of packages sub check_list { my $ref = shift; my $fail = shift; my $ok = 1; my @to_remove = (); foreach (@{$ref}) { if (not exists $excluded{$_}) { msg(1," $_ has been refused because it doesn't exist ...\n"); $ok = 0; push @to_remove, $_; next; } if (not accepted($_)) { msg(1," $_ has been refused because of $excluded{$_} ...\n"); $ok = 0; push @to_remove, $_; next; } if ($included{$_}) { msg(1, " $_ has already been included in CD $included{$_}.\n"); push @to_remove, $_; next; } } my $removed; foreach $removed (@to_remove) { msg(2, " Removing $removed ...\n"); @{$ref} = grep { $_ ne $removed } @{$ref}; } return ($fail ? $ok : 1); } # Add packages to the current CD number $cd sub add_to_cd { my $cd = shift; my $ref = shift; $cds{$cd} = [] if not ref $cds{$cd}; msg(2, " Adding @{$ref} to CD $cd ...\n"); push(@{$cds{$cd}}, @{$ref}); }