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|
package URPM;
use strict;
#- prepare build of an hdlist from a list of files.
#- it can be used to start computing depslist.
#- parameters are :
#- rpms : array of all rpm file name to parse (mandatory)
#- dir : directory wich will contain headers (default to /tmp/.build_hdlist)
#- callback : perl code to be called for each package read (default pack_header)
#- clean : bool to clean cache before (default no).
sub parse_rpms_build_headers {
my ($urpm, %options) = @_;
my ($dir, %cache, @headers, %names);
local (*DIR, *F);
#- check for mandatory options.
if (@{$options{rpms} || []} > 0) {
#- build a working directory which will hold rpm headers.
$dir = $options{dir} || ($ENV{TMPDIR} || "/tmp") . "/.build_hdlist";
$options{clean} and system(($ENV{LD_LOADER} ? ($ENV{LD_LOADER}) : ()), "rm", "-rf", $dir);
-d $dir or mkdir $dir, 0755 or die "cannot create directory $dir\n";
#- examine cache if it contains any headers which will be much faster to read
#- than parsing rpm file directly.
unless ($options{clean}) {
opendir DIR, $dir;
while (my $file = readdir DIR) {
$file =~ /(.+?-[^:\-]+-[^:\-]+\.[^:\-\.]+)(?::(\S+))?$/ or next;
$cache{$2 || $1} = $file;
}
closedir DIR;
}
foreach (@{$options{rpms}}) {
my ($key) = /([^\/]*)\.rpm$/ or next; #- get rpm filename.
my ($id, $filename);
if ($cache{$key} && -s "$dir/$cache{$key}") {
($id, undef) = $urpm->parse_hdlist("$dir/$cache{$key}", !$options{callback});
defined $id or die "bad header $dir/$cache{$key}\n";
$options{callback} and $options{callback}->($urpm, $id, %options);
$filename = $cache{$key};
} else {
($id, undef) = $urpm->parse_rpm($_);
defined $id or die "bad rpm $_\n";
my $pkg = $urpm->{depslist}[$id];
$filename = $pkg->fullname;
"$filename.rpm" eq $pkg->filename or $filename .= ":$key";
print STDERR "$dir/$filename\n";
unless (-s "$dir/$filename") {
open F, ">$dir/$filename" or die "unable to open $dir/$filename for writing\n";
$pkg->build_header(fileno *F);
close F;
}
-s "$dir/$filename" or unlink("$dir/$filename"), die "can create header $dir/$filename\n";
#- make smart use of memory (no need to keep header in memory now).
if ($options{callback}) {
$options{callback}->($urpm, $id, %options);
} else {
$pkg->pack_header;
}
}
#- keep track of header associated (to avoid rereading rpm filename directly
#- if rereading has been made neccessary).
push @headers, $filename;
}
}
@headers;
}
#- allow rereading of hdlist and clean.
sub unresolved_provides_clean {
my ($urpm) = @_;
my @potentially_unresolved = keys %{$urpm->{provides} || {}};
@{$urpm}{qw(depslist provides)} = ([], {});
@{$urpm->{provides}}{@potentially_unresolved} = ();
}
#- read a list of headers (typically when building an hdlist when provides have
#- been cleaned.
#- parameters are :
#- headers : array of all headers file name to parse (mandatory)
#- dir : directory wich contains headers (default to /tmp/.build_hdlist)
#- callback : perl code to be called for each package read (default pack_header)
sub parse_headers {
my ($urpm, %options) = @_;
my ($dir, $start, $id);
$dir = $options{dir} || ($ENV{TMPDIR} || "/tmp") . "/.build_hdlist";
-d $dir or die "no directory $dir\n";
$start = @{$urpm->{depslist} || []};
foreach (@{$options{headers} || []}) {
#- make smart use of memory (no need to keep header in memory now).
($id, undef) = $urpm->parse_hdlist("$dir/$_", !$options{callback});
defined $id or die "bad header $dir/$_\n";
$options{callback} and $options{callback}->($urpm, $id, %options);
}
defined $id ? ($start, $id) : ();
}
#- compute dependencies, result in stored in info values of urpm.
#- operations are incremental, it is possible to read just one hdlist, compute
#- dependencies and read another hdlist, and again.
#- parameters are :
#- callback : callback to relocate reference to package id.
sub compute_deps {
my ($urpm, %options) = @_;
my %propagated_weight = ( basesystem => 10000,
msec => 20000,
filesystem => 50000,
);
my ($locales_weight, $step_weight, $fixed_weight) = (-5000, 10000, $propagated_weight{basesystem});
#- avoid recomputing already present infos, take care not to modify
#- existing entries, as the array here is used instead of values of infos.
my $start = @{$urpm->{deps} ||= []};
my $end = $#{$urpm->{depslist} || []};
#- check if something has to be done.
$start > $end and return;
#- take into account in which hdlist a package has been found.
#- this can be done by an incremental take into account generation
#- of depslist.ordered part corresponding to the hdlist.
#- compute closed requires, do not take into account choices.
foreach ($start .. $end) {
my $pkg = $urpm->{depslist}[$_];
my %required_packages;
my @required_packages;
my %requires; @requires{$pkg->requires_nosense} = ();
my @requires = keys %requires;
while (my $req = shift @requires) {
$req =~ /^basesystem/ and next; #- never need to requires basesystem directly as always required! what a speed up!
$req = ($req =~ /^\d+$/ && [ $req ] ||
$urpm->{provides}{$req} && [ keys %{$urpm->{provides}{$req}} ] ||
[ ($req !~ /NOTFOUND_/ && "NOTFOUND_") . $req ]);
if (@$req > 1) {
#- this is a choice, no closure need to be done here.
push @required_packages, $req;
} else {
#- this could be nothing if the provides is a file not found.
#- and this has been fixed above.
foreach (@$req) {
my $pkg_ = /^\d+$/ && $urpm->{depslist}[$_];
exists $required_packages{$_} and next;
$required_packages{$_} = undef; $pkg_ or next;
foreach ($pkg_->requires_nosense) {
unless (exists $requires{$_}) {
$requires{$_} = undef;
push @requires, $_;
}
}
}
}
}
#- examine choice to remove those which are not mandatory.
foreach (@required_packages) {
unless (grep { exists $required_packages{$_} } @$_) {
$required_packages{join '|', sort { $a <=> $b } @$_} = undef;
}
}
#- store a short representation of requires.
$urpm->{requires}[$_] = join ' ', keys %required_packages;
}
#- expand choices and closure again.
my %ordered;
foreach ($start .. $end) {
my @requires = ($_);
my ($dep, %requires);
while (defined ($dep = shift @requires)) {
exists $requires{$dep} || /^[^\d\|]*$/ and next;
foreach ($dep, split ' ', (defined $urpm->{deps}[$dep] ? $urpm->{deps}[$dep] : $urpm->{requires}[$dep])) {
if (/\|/) {
push @requires, split /\|/, $_;
} else {
/^\d+$/ and $requires{$_} = undef;
}
}
}
my $pkg = $urpm->{depslist}[$_];
my $delta = 1 + $propagated_weight{$pkg->name};
foreach (keys %requires) {
$ordered{$_} += $delta;
}
}
#- some package should be sorted at the beginning.
foreach (qw(basesystem msec rpm locales filesystem setup glibc sash bash libtermcap2 termcap readline ldconfig)) {
foreach (keys %{$urpm->{provides}{$_} || {}}) {
/^\d+$/ and $ordered{$_} = $fixed_weight;
}
/locales/ and $locales_weight += $fixed_weight;
$fixed_weight += $step_weight;
}
foreach ($start .. $end) {
my $pkg = $urpm->{depslist}[$_];
$pkg->name =~ /locales-[a-zA-Z]/ and $ordered{$_} = $locales_weight;
}
#- compute base flag, consists of packages which are required without
#- choices of basesystem and are ALWAYS installed. these packages can
#- safely be removed from requires of others packages.
foreach (qw(basesystem glibc kernel)) {
foreach (keys %{$urpm->{provides}{$_} || {}}) {
foreach ($_, split ' ', (defined $urpm->{deps}[$_] ? $urpm->{deps}[$_] : $urpm->{requires}[$_])) {
/^\d+$/ and $urpm->{depslist}[$_] and $urpm->{depslist}[$_]->set_flag_base(1);
}
}
}
#- give an id to each packages, start from number of package already
#- registered in depslist.
my %remap_ids; @remap_ids{sort {
$ordered{$b} <=> $ordered{$a} or do {
my ($na, $nb) = map { $urpm->{depslist}[$_]->name } ($a, $b);
my ($sa, $sb) = map { /^lib(.*)/ and $1 } ($na, $nb);
$sa && $sb ? $sa cmp $sb : $sa ? -1 : $sb ? +1 : $na cmp $nb;
}} ($start .. $end)} = ($start .. $end);
#- recompute requires to use packages id, drop any base packages or
#- reference of a package to itself.
my @depslist;
foreach ($start .. $end) {
my $pkg = $urpm->{depslist}[$_];
#- set new id.
$pkg->set_id($remap_ids{$_});
my ($id, $base, %requires_id, %not_founds);
foreach (split ' ', $urpm->{requires}[$_]) {
if (/\|/) {
#- all choices are grouped together at the end of requires,
#- this allow computation of dropable choices.
my ($to_drop, @choices_base_id, @choices_id);
foreach (split /\|/, $_) {
my ($id, $base) = (exists $remap_ids{$_} ? $remap_ids{$_} : $_, $urpm->{depslist}[$_]->flag_base);
$base and push @choices_base_id, $id;
$base &&= ! $pkg->flag_base;
$to_drop ||= $id == $pkg->id || exists $requires_id{$id} || $base;
push @choices_id, $id;
}
#- package can safely be dropped as it will be selected in requires directly.
$to_drop and next;
#- if a base package is in a list, keep it instead of the choice.
if (@choices_base_id) {
@choices_id = @choices_base_id;
$base = 1;
}
if (@choices_id == 1) {
$id = $choices_id[0];
} else {
my $choices_key = join '|', sort { $a <=> $b } @choices_id;
$requires_id{$choices_key} = undef;
next;
}
} elsif (/^\d+$/) {
($id, $base) = (exists $remap_ids{$_} ? $remap_ids{$_} : $_, $urpm->{depslist}[$_]->flag_base);
} else {
$not_founds{$_} = undef;
next;
}
#- select individual package from choices or defined package.
$base &&= ! $pkg->flag_base;
$base || $id == $pkg->id or $requires_id{$id} = undef;
}
#- be smart with memory usage.
delete $urpm->{requires}[$_];
$urpm->{deps}[$remap_ids{$_}] = join ' ', ((sort { ($a =~ /^(\d+)/)[0] <=> ($b =~ /^(\d+)/)[0] } keys %requires_id),
keys %not_founds);
$depslist[$remap_ids{$_}-$start] = $pkg;
}
#- remap all provides ids for new package position and update depslist.
delete $urpm->{requires};
@{$urpm->{depslist}}[$start .. $end] = @depslist;
foreach my $h (values %{$urpm->{provides}}) {
my %provided;
foreach (keys %{$h || {}}) {
$provided{exists $remap_ids{$_} ? $remap_ids{$_} : $_} = delete $h->{$_};
}
$h = \%provided;
}
$options{callback} and $options{callback}->($urpm, \%remap_ids, %options);
($start, $end);
}
#- build an hdlist from existing depslist, from start to end inclusive.
#- parameters are :
#- hdlist : hdlist file to use.
#- dir : directory wich contains headers (default to /tmp/.build_hdlist)
#- start : index of first package (default to first index of depslist).
#- end : index of last package (default to last index of depslist).
#- ratio : compression ratio (default 4).
#- split : split ratio (default 400000).
sub build_hdlist {
my ($urpm, %options) = @_;
my ($dir, $start, $end, $ratio, $split);
$dir = $options{dir} || ($ENV{TMPDIR} || "/tmp") . "/.build_hdlist";
-d $dir or die "no directory $dir\n";
$start = $options{start} || 0;
$end = $options{end} || $#{$urpm->{depslist}};
#- compression ratio are not very high, sample for cooker
#- gives the following (main only and cache fed up):
#- ratio compression_time size
#- 9 21.5 sec 8.10Mb -> good for installation CD
#- 6 10.7 sec 8.15Mb
#- 5 9.5 sec 8.20Mb
#- 4 8.6 sec 8.30Mb -> good for urpmi
#- 3 7.6 sec 8.60Mb
$ratio = $options{ratio} || 4;
$split = $options{split} || 400000;
open B, "| " . ($ENV{LD_LOADER} || '') . " packdrake -b${ratio}ds '$options{hdlist}' '$dir' $split";
foreach my $pkg (@{$urpm->{depslist}}[$start .. $end]) {
my $filename = $pkg->fullname;
"$filename.rpm" ne $pkg->filename && $pkg->filename =~ /([^\/]*)\.rpm$/ and $filename .= ":$1";
-s "$dir/$filename" or die "bad header $dir/$filename\n";
print B "$filename\n";
}
close B or die "packdrake failed\n";
}
#- build synthesis file.
#- parameters are :
#- synthesis : synthesis file to create (mandatory if fd not given).
#- fd : file descriptor (mandatory if synthesis not given).
#- dir : directory wich contains headers (default to /tmp/.build_hdlist)
#- start : index of first package (default to first index of depslist).
#- end : index of last package (default to last index of depslist).
#- ratio : compression ratio (default 9).
sub build_synthesis {
my ($urpm, %options) = @_;
my ($start, $end, $ratio);
$start = $options{start} || 0;
$end = $options{end} || $#{$urpm->{depslist}};
$start > $end and return;
$ratio = $options{ratio} || 9;
$options{synthesis} || defined $options{fd} or die "invalid parameters given";
#- first pass: traverse provides to find files provided.
my %provided_files;
foreach (keys %{$urpm->{provides}}) {
/^\// or next;
foreach my $id (keys %{$urpm->{provides}{$_} || {}}) {
push @{$provided_files{$id} ||= []}, $_;
}
}
#- second pass: write each info including files provided.
local *F;
$options{synthesis} and open F, "| " . ($ENV{LD_LOADER} || '') . " gzip -$ratio >'$options{synthesis}'";
foreach ($start .. $end) {
my $pkg = $urpm->{depslist}[$_];
my %files;
if ($provided_files{$_}) {
@files{@{$provided_files{$_}}} = undef;
delete @files{$pkg->provides_nosense};
}
$pkg->build_info($options{synthesis} ? fileno *F : $options{fd}, join('@', keys %files));
}
close F;
}
#- write depslist.ordered file according to info in params.
#- parameters are :
#- depslist : depslist.ordered file to create.
#- provides : provides file to create.
#- compss : compss file to create.
sub build_base_files {
my ($urpm, %options) = @_;
local *F;
if ($options{depslist}) {
open F, ">$options{depslist}";
for (0 .. $#{$urpm->{depslist}}) {
my $pkg = $urpm->{depslist}[$_];
printf F ("%s-%s-%s.%s%s %s %s\n", $pkg->fullname,
($pkg->epoch ? ':' . $pkg->epoch : ''), $pkg->size || 0, $urpm->{deps}[$_]);
}
close F;
}
if ($options{provides}) {
open F, ">$options{provides}";
while (my ($k, $v) = each %{$urpm->{provides}}) {
printf F "%s\n", join '@', $k, map { scalar $urpm->{depslist}[$_]->fullname } keys %{$v || {}};
}
close F;
}
if ($options{compss}) {
my %p;
open F, ">$options{compss}";
foreach (@{$urpm->{depslist}}) {
$_->group or next;
push @{$p{$_->group} ||= []}, $_->name;
}
foreach (sort keys %p) {
print F $_, "\n";
foreach (@{$p{$_}}) {
print F "\t", $_, "\n";
}
print F "\n";
}
close F;
}
1;
}
1;
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