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| | # Copyright (C) 2021 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# front-end for the "lei import" sub-command
package PublicInbox::LeiImport;
use strict;
use v5.10.1;
use parent qw(PublicInbox::IPC);
use PublicInbox::Eml;
use PublicInbox::InboxWritable qw(eml_from_path);
use PublicInbox::PktOp;
sub _import_eml { # MboxReader callback
my ($eml, $sto, $set_kw) = @_;
$sto->ipc_do('set_eml', $eml, $set_kw ? $sto->mbox_keywords($eml) : ());
}
sub import_done_wait { # dwaitpid callback
my ($arg, $pid) = @_;
my ($imp, $lei) = @$arg;
$lei->child_error($?, 'non-fatal errors during import') if $?;
my $ign = $lei->{sto}->ipc_do('done'); # PublicInbox::LeiStore::done
$lei->dclose;
}
sub import_done { # EOF callback for main daemon
my ($lei) = @_;
my $imp = delete $lei->{imp} or return;
$imp->wq_wait_old(\&import_done_wait, $lei);
}
sub check_fmt ($;$) {
my ($lei, $f) = @_;
my $fmt = $lei->{opt}->{'format'};
if (!$fmt) {
my $err = $f ? "regular file(s):\n@$f" : '--stdin';
return $lei->fail("--format unset for $err");
}
return 1 if $fmt eq 'eml';
require PublicInbox::MboxReader;
PublicInbox::MboxReader->can($fmt) ||
$lei->fail( "--format=$fmt unrecognized\n");
}
sub do_import {
my ($lei) = @_;
my $ops = {
'!' => [ $lei->can('fail_handler'), $lei ],
'x_it' => [ $lei->can('x_it'), $lei ],
'child_error' => [ $lei->can('child_error'), $lei ],
'' => [ \&import_done, $lei ],
};
($lei->{pkt_op_c}, $lei->{pkt_op_p}) = PublicInbox::PktOp->pair($ops);
my $self = $lei->{imp};
my $j = $lei->{opt}->{jobs} // scalar(@{$self->{argv}}) || 1;
if (my $nrd = $lei->{nrd}) {
# $j = $nrd->net_concurrency($j); TODO
} else {
my $nproc = $self->detect_nproc;
$j = $nproc if $j > $nproc;
}
$self->wq_workers_start('lei_import', $j, $lei->oldset, {lei => $lei});
my $op = delete $lei->{pkt_op_c};
delete $lei->{pkt_op_p};
$self->wq_io_do('import_stdin', []) if $self->{0};
for my $x (@{$self->{argv}}) {
$self->wq_io_do('import_path_url', [], $x);
}
$self->wq_close(1);
$lei->event_step_init; # wait for shutdowns
if ($lei->{oneshot}) {
while ($op->{sock}) { $op->event_step }
}
}
sub call { # the main "lei import" method
my ($cls, $lei, @argv) = @_;
my $sto = $lei->_lei_store(1);
$sto->write_prepare($lei);
$lei->{opt}->{kw} //= 1;
my $self = $lei->{imp} = bless { argv => \@argv }, $cls;
if ($lei->{opt}->{stdin}) {
@argv and return
$lei->fail("--stdin and locations (@argv) do not mix");
check_fmt($lei) or return;
$self->{0} = $lei->{0};
} else {
my @f;
for my $x (@argv) {
if (-f $x) { push @f, $x }
elsif (-d _) { require PublicInbox::MdirReader }
else {
require PublicInbox::NetReader;
$lei->{nrd} //= PublicInbox::NetReader->new;
$lei->{nrd}->add_url($x);
}
}
if (@f) { check_fmt($lei, \@f) or return }
if ($lei->{nrd} && (my @err = $lei->{nrd}->errors)) {
return $lei->fail(@err);
}
}
do_import($lei);
}
sub ipc_atfork_child {
my ($self) = @_;
$self->{lei}->lei_atfork_child;
$self->SUPER::ipc_atfork_child;
}
sub _import_fh {
my ($lei, $fh, $x) = @_;
my $set_kw = $lei->{opt}->{kw};
my $fmt = $lei->{opt}->{'format'};
eval {
if ($fmt eq 'eml') {
my $buf = do { local $/; <$fh> } //
return $lei->child_error(1 >> 8, <<"");
error reading $x: $!
my $eml = PublicInbox::Eml->new(\$buf);
_import_eml($eml, $lei->{sto}, $set_kw);
} else { # some mbox (->can already checked in call);
my $cb = PublicInbox::MboxReader->can($fmt) //
die "BUG: bad fmt=$fmt";
$cb->(undef, $fh, \&_import_eml, $lei->{sto}, $set_kw);
}
};
$lei->child_error(1 >> 8, "<stdin>: $@") if $@;
}
sub _import_maildir { # maildir_each_file cb
my ($f, $sto, $set_kw) = @_;
$sto->ipc_do('set_eml_from_maildir', $f, $set_kw);
}
sub import_path_url {
my ($self, $x) = @_;
my $lei = $self->{lei};
# TODO auto-detect?
if (-f $x) {
open my $fh, '<', $x or return $lei->child_error(1 >> 8, <<"");
unable to open $x: $!
_import_fh($lei, $fh, $x);
} elsif (-d _ && (-d "$x/cur" || -d "$x/new")) {
PublicInbox::MdirReader::maildir_each_file($x,
\&_import_maildir,
$lei->{sto}, $lei->{opt}->{kw});
} else {
$lei->fail("$x unsupported (TODO)");
}
}
sub import_stdin {
my ($self) = @_;
_import_fh($self->{lei}, $self->{0}, '<stdin>');
}
1;
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