scripts/xhdr-num2mid

   1 #!/usr/bin/perl -w
   2 # Copyright (C) 2016-2021 all contributors <meta@public-inbox.org>
   3 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
   4 # Useful for mapping article IDs from existing NNTP servers to MIDs
   5 use strict;
   6 use warnings;
   7 use Net::NNTP;
   8 use Getopt::Long qw(:config gnu_getopt no_ignore_case auto_abbrev);
   9 my $usage = "usage: NNTPSERVER=news.example.org $0 GROUP [FIRST_NUM]\n";
  10 my ($msgmap, $mm);
  11 my %opts = ( '--msgmap=s' => \$msgmap );
  12 GetOptions(%opts) or die "bad command-line args\n$usage";
  13
  14 if ($msgmap) {
  15         require PublicInbox::Msgmap;
  16         require PublicInbox::MID; # mid_clean
  17         $mm = PublicInbox::Msgmap->new_file($msgmap, 1);
  18 }
  19
  20 my $group = shift or die $usage;
  21 my $nntp = Net::NNTP->new($ENV{NNTPSERVER} || '127.0.0.1');
  22 my ($num, $first, $last) = $nntp->group($group);
  23 die "Invalid group\n" if !(defined $num && defined $first && defined $last);
  24 my $arg_first = shift;
  25 if (defined $arg_first) {
  26         $arg_first =~ /\A[0-9]+\z/ or die $usage;
  27         $first = $arg_first;
  28 } elsif ($mm) {
  29         my $last_article = $mm->meta_accessor('last_article');
  30         $first = $last_article + 1 if defined $last_article;
  31 }
  32
  33 my $batch = 1000;
  34 my $i;
  35 for ($i = $first; $i < $last; $i += $batch) {
  36         my $j = $i + $batch - 1;
  37         $j = $last if $j > $last;
  38         my $num2mid = $nntp->xhdr('Message-ID', "$i-$j");
  39
  40         $mm->{dbh}->begin_work if $mm;
  41         for my $n ($i..$j) {
  42                 defined(my $mid = $num2mid->{$n}) or next;
  43                 print "$n $mid\n";
  44                 if ($mm) {
  45                         $mid = PublicInbox::MID::mid_clean($mid);
  46                         $mm->mid_set($n, $mid);
  47                 }
  48         }
  49         if ($mm) {
  50                 $mm->meta_accessor('last_article', $j);
  51                 $mm->{dbh}->commit;
  52         }
  53 }