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package urpm::parallel_ssh;
# $Id$
#- Copyright (C) 2002, 2003, 2004, 2005 MandrakeSoft SA
#- Copyright (C) 2005 Mandriva SA
use strict;
use urpm::util;
use urpm::msg;
use urpm::parallel;
our @ISA = 'urpm::parallel';
(our $VERSION) = q($Revision$) =~ /(\d+)/;
sub _localhost { $_[0] eq 'localhost' }
sub _ssh { &_localhost ? '' : "ssh $_[0] " }
sub _host { &_localhost ? '' : "$_[0]:" }
sub _scp {
my ($urpm, $host, @para) = @_;
my $dest = pop @para;
$urpm->{log}("parallel_ssh: scp " . join(' ', @para) . " $host:$dest");
system('scp', @para, _host($host) . $dest) == 0
or $urpm->{fatal}(1, N("scp failed on host %s (%d)", $host, $? >> 8));
}
sub copy_to_dir {
my ($parallel, $urpm, @para) = @_;
my $dir = pop @para;
foreach my $host (keys %{$parallel->{nodes}}) {
if (_localhost($host)) {
if (my @f = grep { dirname($_) ne $dir } @para) {
$urpm->{log}("parallel_ssh: cp @f $urpm->{cachedir}/rpms");
system('cp', @f, $dir) == 0
or $urpm->{fatal}(1, N("cp failed on host %s (%d)", $host, $? >> 8));
}
} else {
_scp($urpm, $host, @para, $dir);
}
}
}
sub _ssh_urpm {
my ($urpm, $node, $cmd, $para) = @_;
$cmd ne 'urpme' && _localhost($node) and $para = "--nolock $para";
my $command = _ssh($node) . " $cmd --no-locales $para";
$urpm->{log}("parallel_ssh: $command");
$command;
}
sub _ssh_urpm_popen {
my ($urpm, $node, $cmd, $para) = @_;
my $command = _ssh_urpm($urpm, $node, $cmd, $para);
open(my $fh, "$command |") or $urpm->{fatal}(1, "Can't fork ssh: $!");
$fh;
}
sub urpm_popen {
my ($parallel, $urpm, $cmd, $para, $do) = @_;
foreach my $node (keys %{$parallel->{nodes}}) {
my $fh = _ssh_urpm_popen($urpm, $node, $cmd, $para);
while (my $s = <$fh>) {
$do->($node, $s) or last;
}
close $fh or $urpm->{fatal}(1, N("host %s does not have a good version of urpmi (%d)", $node, $? >> 8));
}
}
#- parallel resolve_dependencies
sub parallel_resolve_dependencies {
my ($parallel, $synthesis, $urpm, $state, $requested, %options) = @_;
#- first propagate the synthesis file to all machines
foreach (grep { !_localhost($_) } keys %{$parallel->{nodes}}) {
_scp($urpm, $_, '-q', $synthesis, $synthesis);
}
$parallel->{synthesis} = $synthesis;
my $line = urpm::parallel::simple_resolve_dependencies($parallel, $urpm, $state, $requested, %options);
#- execute urpmq to determine packages to install.
my ($cont, %chosen);
do {
$cont = 0; #- prepare to stop iteration.
#- the following state should be cleaned for each iteration.
delete $state->{selected};
#- now try an iteration of urpmq.
$parallel->urpm_popen($urpm, "urpmq", "--synthesis $synthesis -fduc $line " . join(' ', keys %chosen), sub {
my ($node, $s) = @_;
urpm::parallel::parse_urpmq_output($urpm, $state, $node, $s, \$cont, \%chosen, %options);
});
#- check for internal error of resolution.
$cont == 1 and die "internal distant urpmq error on choice not taken";
} while $cont;
#- keep trace of what has been chosen finally (if any).
$parallel->{line} = join(' ', $line, keys %chosen);
}
#- parallel install.
sub parallel_install {
my ($parallel, $urpm, undef, $install, $upgrade, %options) = @_;
copy_to_dir($parallel, $urpm, values %$install, values %$upgrade, "$urpm->{cachedir}/rpms");
my %bad_nodes;
$parallel->urpm_popen($urpm, 'urpmi', "--pre-clean --test --no-verify-rpm --auto --synthesis $parallel->{synthesis} $parallel->{line}", sub {
my ($node, $s) = @_;
$bad_nodes{$node} .= $s;
$s =~ /Installation failed/ and $bad_nodes{$node} = '';
$s =~ /Installation is possible/ and delete $bad_nodes{$node}, return 1;
undef;
});
foreach (keys %{$parallel->{nodes}}) {
exists $bad_nodes{$_} or next;
$urpm->{error}(N("Installation failed on node %s", $_) . ":\n" . $bad_nodes{$_});
}
%bad_nodes and return;
if ($options{test}) {
$urpm->{error}(N("Installation is possible"));
1;
} else {
my $line = $parallel->{line} . ($options{excludepath} ? " --excludepath '$options{excludepath}'" : "");
#- continue installation on each node
foreach my $node (keys %{$parallel->{nodes}}) {
my $command = _ssh_urpm($urpm, $node, 'urpmi', "--no-verify-rpm --auto --synthesis $parallel->{synthesis} $line");
system($command);
}
}
}
#- allow to bootstrap from urpmi code directly (namespace is urpm).
package urpm;
no warnings 'redefine';
sub handle_parallel_options {
my (undef, $options) = @_;
my ($id, @nodes) = split /:/, $options;
if ($id =~ /^ssh(?:\(([^\)]*)\))?$/) {
my %nodes; @nodes{@nodes} = undef;
return bless {
media => $1,
nodes => \%nodes,
}, "urpm::parallel_ssh";
}
return undef;
}
1;
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