user/dev discussion of public-inbox itself
 help / color / mirror / code / Atom feed
76a270bca0c01e9c6121c530ff405594f04d6114 blob 16500 bytes (raw)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
 
# Copyright (C) 2015-2021 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# based on notmuch, but with no concept of folders, files or flags
#
# Read-only search interface for use by the web and NNTP interfaces
package PublicInbox::Search;
use strict;
use parent qw(Exporter);
our @EXPORT_OK = qw(retry_reopen int_val get_pct xap_terms);
use List::Util qw(max);
use POSIX qw(strftime);

# values for searching, changing the numeric value breaks
# compatibility with old indices (so don't change them it)
use constant {
	TS => 0, # Received: header in Unix time (IMAP INTERNALDATE)
	YYYYMMDD => 1, # Date: header for searching in the WWW UI
	DT => 2, # Date: YYYYMMDDHHMMSS

	# added for public-inbox 1.6.0+
	BYTES => 3, # IMAP RFC822.SIZE
	UID => 4, # IMAP UID == NNTP article number == Xapian docid
	THREADID => 5, # RFC 8474, RFC 8621

	# TODO
	# REPLYCNT => ?, # IMAP ANSWERED

	# SCHEMA_VERSION history
	# 0 - initial
	# 1 - subject_path is lower-cased
	# 2 - subject_path is id_compress in the index, only
	# 3 - message-ID is compressed if it includes '%' (hack!)
	# 4 - change "Re: " normalization, avoid circular Reference ghosts
	# 5 - subject_path drops trailing '.'
	# 6 - preserve References: order in document data
	# 7 - remove references and inreplyto terms
	# 8 - remove redundant/unneeded document data
	# 9 - disable Message-ID compression (SHA-1)
	# 10 - optimize doc for NNTP overviews
	# 11 - merge threads when vivifying ghosts
	# 12 - change YYYYMMDD value column to numeric
	# 13 - fix threading for empty References/In-Reply-To
	#      (commit 83425ef12e4b65cdcecd11ddcb38175d4a91d5a0)
	# 14 - fix ghost root vivification
	# 15 - see public-inbox-v2-format(5)
	#      further bumps likely unnecessary, we'll suggest in-place
	#      "--reindex" use for further fixes and tweaks:
	#
	#      public-inbox v1.5.0 adds (still SCHEMA_VERSION=15):
	#      * "lid:" and "l:" for List-Id searches
	#
	#      v1.6.0 adds BYTES, UID and THREADID values
	SCHEMA_VERSION => 15,
};

use PublicInbox::Smsg;
use PublicInbox::Over;
our $QP_FLAGS;
our %X = map { $_ => 0 } qw(BoolWeight Database Enquire QueryParser Stem Query);
our $Xap; # 'Search::Xapian' or 'Xapian'
our $NVRP; # '$Xap::'.('NumberValueRangeProcessor' or 'NumberRangeProcessor')

# ENQ_DESCENDING and ENQ_ASCENDING weren't in SWIG Xapian.pm prior to 1.4.16,
# let's hope the ABI is stable
our $ENQ_DESCENDING = 0;
our $ENQ_ASCENDING = 1;

sub load_xapian () {
	return 1 if defined $Xap;
	# n.b. PI_XAPIAN is intended for development use only.  We still
	# favor Search::Xapian since that's what's available in current
	# Debian stable (10.x) and derived distros.
	for my $x (($ENV{PI_XAPIAN} // 'Search::Xapian'), 'Xapian') {
		eval "require $x";
		next if $@;

		$x->import(qw(:standard));
		$Xap = $x;

		# `version_string' was added in Xapian 1.1
		my $xver = eval('v'.eval($x.'::version_string()')) //
				eval('v'.eval($x.'::xapian_version_string()'));

		# NumberRangeProcessor was added in Xapian 1.3.6,
		# NumberValueRangeProcessor was removed for 1.5.0+,
		# favor the older /Value/ variant since that's what our
		# (currently) preferred Search::Xapian supports
		$NVRP = $x.'::'.($x eq 'Xapian' && $xver ge v1.5 ?
			'NumberRangeProcessor' : 'NumberValueRangeProcessor');
		$X{$_} = $Xap.'::'.$_ for (keys %X);

		*sortable_serialise = $x.'::sortable_serialise';
		*sortable_unserialise = $x.'::sortable_unserialise';
		# n.b. FLAG_PURE_NOT is expensive not suitable for a public
		# website as it could become a denial-of-service vector
		# FLAG_PHRASE also seems to cause performance problems chert
		# (and probably earlier Xapian DBs).  glass seems fine...
		# TODO: make this an option, maybe?
		# or make indexlevel=medium as default
		$QP_FLAGS = FLAG_PHRASE() | FLAG_BOOLEAN() | FLAG_LOVEHATE() |
				FLAG_WILDCARD();
		return 1;
	}
	undef;
}

# This is English-only, everything else is non-standard and may be confused as
# a prefix common in patch emails
our $LANG = 'english';

# note: the non-X term prefix allocations are shared with
# Xapian omega, see xapian-applications/omega/docs/termprefixes.rst
my %bool_pfx_external = (
	mid => 'Q', # Message-ID (full/exact), this is mostly uniQue
	lid => 'G', # newsGroup (or similar entity), just inside <>
	dfpre => 'XDFPRE',
	dfpost => 'XDFPOST',
	dfblob => 'XDFPRE XDFPOST',
);

my $non_quoted_body = 'XNQ XDFN XDFA XDFB XDFHH XDFCTX XDFPRE XDFPOST';
my %prob_prefix = (
	# for mairix compatibility
	s => 'S',
	m => 'XM', # 'mid:' (bool) is exact, 'm:' (prob) can do partial
	l => 'XL', # 'lid:' (bool) is exact, 'l:' (prob) can do partial
	f => 'A',
	t => 'XTO',
	tc => 'XTO XCC',
	c => 'XCC',
	tcf => 'XTO XCC A',
	a => 'XTO XCC A',
	b => $non_quoted_body . ' XQUOT',
	bs => $non_quoted_body . ' XQUOT S',
	n => 'XFN',

	q => 'XQUOT',
	nq => $non_quoted_body,
	dfn => 'XDFN',
	dfa => 'XDFA',
	dfb => 'XDFB',
	dfhh => 'XDFHH',
	dfctx => 'XDFCTX',

	# default:
	'' => 'XM S A XQUOT XFN ' . $non_quoted_body,
);

# not documenting m: and mid: for now, the using the URLs works w/o Xapian
# not documenting lid: for now, either, it is probably redundant with l:,
# especially since we don't offer boolean searches for To/Cc/From
# headers, either
our @HELP = (
	's:' => 'match within Subject  e.g. s:"a quick brown fox"',
	'd:' => <<EOF,
date range as YYYYMMDD  e.g. d:19931002..20101002
Open-ended ranges such as d:19931002.. and d:..20101002
are also supported
EOF
	'dt:' => <<EOF,
date-time range as YYYYMMDDhhmmss (e.g. dt:19931002011000..19931002011200)
EOF
	'b:' => 'match within message body, including text attachments',
	'nq:' => 'match non-quoted text within message body',
	'q:' => 'match quoted text within message body',
	'n:' => 'match filename of attachment(s)',
	't:' => 'match within the To header',
	'c:' => 'match within the Cc header',
	'f:' => 'match within the From header',
	'a:' => 'match within the To, Cc, and From headers',
	'tc:' => 'match within the To and Cc headers',
	'l:' => 'match contents of the List-Id header',
	'bs:' => 'match within the Subject and body',
	'dfn:' => 'match filename from diff',
	'dfa:' => 'match diff removed (-) lines',
	'dfb:' => 'match diff added (+) lines',
	'dfhh:' => 'match diff hunk header context (usually a function name)',
	'dfctx:' => 'match diff context lines',
	'dfpre:' => 'match pre-image git blob ID',
	'dfpost:' => 'match post-image git blob ID',
	'dfblob:' => 'match either pre or post-image git blob ID',
);
chomp @HELP;

sub xdir ($;$) {
	my ($self, $rdonly) = @_;
	if ($rdonly || !defined($self->{shard})) {
		$self->{xpfx};
	} else { # v2 only:
		"$self->{xpfx}/$self->{shard}";
	}
}

# returns all shards as separate Xapian::Database objects w/o combining
sub xdb_shards_flat ($) {
	my ($self) = @_;
	my $xpfx = $self->{xpfx};
	my (@xdb, $slow_phrase);
	load_xapian();
	$self->{qp_flags} //= $QP_FLAGS;
	if ($xpfx =~ m/xapian${\SCHEMA_VERSION}\z/) {
		@xdb = ($X{Database}->new($xpfx));
		$self->{qp_flags} |= FLAG_PHRASE() if !-f "$xpfx/iamchert";
	} else {
		opendir(my $dh, $xpfx) or return (); # not initialized yet
		# We need numeric sorting so shard[0] is first for reading
		# Xapian metadata, if needed
		my $last = max(grep(/\A[0-9]+\z/, readdir($dh))) // return ();
		for (0..$last) {
			my $shard_dir = "$self->{xpfx}/$_";
			push @xdb, $X{Database}->new($shard_dir);
			$slow_phrase ||= -f "$shard_dir/iamchert";
		}
		$self->{qp_flags} |= FLAG_PHRASE() if !$slow_phrase;
	}
	@xdb;
}

# v2 Xapian docids don't conflict, so they're identical to
# NNTP article numbers and IMAP UIDs.
# https://trac.xapian.org/wiki/FAQ/MultiDatabaseDocumentID
sub mdocid {
	my ($nshard, $mitem) = @_;
	my $docid = $mitem->get_docid;
	int(($docid - 1) / $nshard) + 1;
}

sub mset_to_artnums {
	my ($self, $mset) = @_;
	my $nshard = $self->{nshard};
	[ map { mdocid($nshard, $_) } $mset->items ];
}

sub xdb ($) {
	my ($self) = @_;
	$self->{xdb} //= do {
		my @xdb = $self->xdb_shards_flat or return;
		$self->{nshard} = scalar(@xdb);
		my $xdb = shift @xdb;
		$xdb->add_database($_) for @xdb;
		$xdb;
	};
}

sub new {
	my ($class, $ibx) = @_;
	ref $ibx or die "BUG: expected PublicInbox::Inbox object: $ibx";
	my $xap = $ibx->version > 1 ? 'xap' : 'public-inbox/xapian';
	bless {
		xpfx => "$ibx->{inboxdir}/$xap" . SCHEMA_VERSION,
		altid => $ibx->{altid},
	}, $class;
}

sub reopen {
	my ($self) = @_;
	if (my $xdb = $self->{xdb}) {
		$xdb->reopen;
	}
	$self; # make chaining easier
}

# Convert git "approxidate" ranges to something usable with our
# Xapian indices.  At the moment, Xapian only offers a C++-only API
# and neither the SWIG nor XS bindings allow us to use custom code
# to parse dates (and libgit2 doesn't expose git__date_parse, either,
# so we're running git-rev-parse(1)).
# This replaces things we need to send to $git->date_parse with
# "\0".$strftime_format.['+'|$idx]."\0" placeholders
sub date_parse_prepare {
	my ($to_parse, $pfx, $range) = @_;
	# are we inside a parenthesized statement?
	my $end = $range =~ s/([\)\s]*)\z// ? $1 : '';
	my @r = split(/\.\./, $range, 2);

	# expand "d:20101002" => "d:20101002..20101003" and like
	# n.b. git doesn't do YYYYMMDD w/o '-', it needs YYYY-MM-DD
	if ($pfx eq 'd') {
		if (!defined($r[1])) {
			if ($r[0] =~ /\A([0-9]{4})([0-9]{2})([0-9]{2})\z/) {
				push @$to_parse, "$1-$2-$3";
				# we could've handled as-is, but we need
				# to parse anyways for "d+" below
			} else {
				push @$to_parse, $r[0];
			}
			$r[0] = "\0%Y%m%d$#$to_parse\0";
			$r[1] = "\0%Y%m%d+\0";
		} else {
			for my $x (@r) {
				next if $x eq '' || $x =~ /\A[0-9]{8}\z/;
				push @$to_parse, $x;
				$x = "\0%Y%m%d$#$to_parse\0";
			}
		}
	} elsif ($pfx eq 'dt') {
		if (!defined($r[1])) { # git needs gaps and not /\d{14}/
			if ($r[0] =~ /\A([0-9]{4})([0-9]{2})([0-9]{2})
					([0-9]{2})([0-9]{2})([0-9]{2})\z/x) {
				push @$to_parse, "$1-$2-$3 $4:$5:$6";
			} else {
				push @$to_parse, $r[0];
			}
			$r[0] = "\0%Y%m%d%H%M%S$#$to_parse\0";
			$r[1] = "\0%Y%m%d%H%M%S+\0";
		} else {
			for my $x (@r) {
				next if $x eq '' || $x =~ /\A[0-9]{14}\z/;
				push @$to_parse, $x;
				$x = "\0%Y%m%d%H%M%S$#$to_parse\0";
			}
		}
	} else { # "rt", let git interpret "YYYY", deal with Y10K later :P
		for my $x (@r) {
			next if $x eq '' || $x =~ /\A[0-9]{5,}\z/;
			push @$to_parse, $x;
			$x = "\0%s$#$to_parse\0";
		}
		$r[1] //= "\0%s+\0";
	}
	"$pfx:".join('..', @r).$end;
}

# n.b. argv never has NUL, though we'll need to filter it out
# if this $argv isn't from a command execution
sub query_argv_to_string {
	my (undef, $git, $argv) = @_;
	my $to_parse;
	my $tmp = join(' ', map {;
		if (s!\b(d|rt|dt):([[:print:]]+)\z!date_parse_prepare(
						$to_parse //= [], $1, $2)!sge) {
			$_;
		} else {
			/\s/ ? (s/\A(\w+:)// ? qq{$1"$_"} : qq{"$_}) : $_
		}
	} @$argv);
	# git-rev-parse can handle any number of args up to system
	# limits (around (4096*32) bytes on Linux).
	if ($to_parse) {
		my @r = $git->date_parse(@$to_parse);
		my $i;
		$tmp =~ s/\0(%[%YmdHMSs]+)([0-9\+]+)\0/strftime($1,
			gmtime($2 eq '+' ? ($r[$i]+86400) : $r[$i=$2+0]))/sge;
	}
	$tmp
}

# read-only
sub mset {
	my ($self, $query_string, $opts) = @_;
	$opts ||= {};
	my $qp = $self->{qp} //= qparse_new($self);
	my $query = $qp->parse_query($query_string, $self->{qp_flags});
	_do_enquire($self, $query, $opts);
}

sub retry_reopen {
	my ($self, $cb, @arg) = @_;
	for my $i (1..10) {
		if (wantarray) {
			my @ret;
			eval { @ret = $cb->($self, @arg) };
			return @ret unless $@;
		} else {
			my $ret;
			eval { $ret = $cb->($self, @arg) };
			return $ret unless $@;
		}
		# Exception: The revision being read has been discarded -
		# you should call Xapian::Database::reopen()
		if (ref($@) =~ /\bDatabaseModifiedError\b/) {
			warn "reopen try #$i on $@\n";
			reopen($self);
		} else {
			# let caller decide how to spew, because ExtMsg queries
			# get wonky and trigger:
			# "something terrible happened at .../Xapian/Enquire.pm"
			die;
		}
	}
	die "Too many Xapian database modifications in progress\n";
}

sub _do_enquire {
	my ($self, $query, $opts) = @_;
	retry_reopen($self, \&_enquire_once, $query, $opts);
}

# returns true if all docs have the THREADID value
sub has_threadid ($) {
	my ($self) = @_;
	(xdb($self)->get_metadata('has_threadid') // '') eq '1';
}

sub _enquire_once { # retry_reopen callback
	my ($self, $query, $opts) = @_;
	my $xdb = xdb($self);
	if (defined(my $eidx_key = $opts->{eidx_key})) {
		$query = $X{Query}->new(OP_FILTER(), $query, 'O'.$eidx_key);
	}
	if (defined(my $uid_range = $opts->{uid_range})) {
		my $range = $X{Query}->new(OP_VALUE_RANGE(), UID,
					sortable_serialise($uid_range->[0]),
					sortable_serialise($uid_range->[1]));
		$query = $X{Query}->new(OP_FILTER(), $query, $range);
	}
	my $enquire = $X{Enquire}->new($xdb);
	$enquire->set_query($query);
	$opts ||= {};
	my $rel = $opts->{relevance} // 0;
	if ($rel == -2) { # ORDER BY docid/UID (highest first)
		$enquire->set_weighting_scheme($X{BoolWeight}->new);
		$enquire->set_docid_order($ENQ_DESCENDING);
	} elsif ($rel == -1) { # ORDER BY docid/UID (lowest first)
		$enquire->set_weighting_scheme($X{BoolWeight}->new);
		$enquire->set_docid_order($ENQ_ASCENDING);
	} elsif ($rel == 0) {
		$enquire->set_sort_by_value_then_relevance(TS, !$opts->{asc});
	} else { # rel > 0
		$enquire->set_sort_by_relevance_then_value(TS, !$opts->{asc});
	}

	# `mairix -t / --threads' or JMAP collapseThreads
	if ($opts->{threads} && has_threadid($self)) {
		$enquire->set_collapse_key(THREADID);
	}
	$enquire->get_mset($opts->{offset} || 0, $opts->{limit} || 50);
}

sub mset_to_smsg {
	my ($self, $ibx, $mset) = @_;
	my $nshard = $self->{nshard};
	my $i = 0;
	my %order = map { mdocid($nshard, $_) => ++$i } $mset->items;
	my @msgs = sort {
		$order{$a->{num}} <=> $order{$b->{num}}
	} @{$ibx->over->get_all(keys %order)};
	wantarray ? ($mset->get_matches_estimated, \@msgs) : \@msgs;
}

# read-write
sub stemmer { $X{Stem}->new($LANG) }

# read-only
sub qparse_new ($) {
	my ($self) = @_;

	my $xdb = xdb($self);
	my $qp = $X{QueryParser}->new;
	$qp->set_default_op(OP_AND());
	$qp->set_database($xdb);
	$qp->set_stemmer(stemmer($self));
	$qp->set_stemming_strategy(STEM_SOME());
	my $cb = $qp->can('set_max_wildcard_expansion') //
		$qp->can('set_max_expansion'); # Xapian 1.5.0+
	$cb->($qp, 100);
	$cb = $qp->can('add_valuerangeprocessor') //
		$qp->can('add_rangeprocessor'); # Xapian 1.5.0+
	$cb->($qp, $NVRP->new(YYYYMMDD, 'd:'));
	$cb->($qp, $NVRP->new(DT, 'dt:'));

	# for IMAP, undocumented for WWW and may be split off go away
	$cb->($qp, $NVRP->new(BYTES, 'bytes:'));
	$cb->($qp, $NVRP->new(TS, 'rt:'));
	$cb->($qp, $NVRP->new(UID, 'uid:'));

	while (my ($name, $prefix) = each %bool_pfx_external) {
		$qp->add_boolean_prefix($name, $_) foreach split(/ /, $prefix);
	}

	# we do not actually create AltId objects,
	# just parse the spec to avoid the extra DB handles for now.
	if (my $altid = $self->{altid}) {
		my $user_pfx = $self->{-user_pfx} = [];
		for (@$altid) {
			# $_ = 'serial:gmane:/path/to/gmane.msgmap.sqlite3'
			# note: Xapian supports multibyte UTF-8, /^[0-9]+$/,
			# and '_' with prefixes matching \w+
			/\Aserial:(\w+):/ or next;
			my $pfx = $1;
			push @$user_pfx, "$pfx:", <<EOF;
alternate serial number  e.g. $pfx:12345 (boolean)
EOF
			# gmane => XGMANE
			$qp->add_boolean_prefix($pfx, 'X'.uc($pfx));
		}
		chomp @$user_pfx;
	}

	while (my ($name, $prefix) = each %prob_prefix) {
		$qp->add_prefix($name, $_) foreach split(/ /, $prefix);
	}
	$qp;
}

sub help {
	my ($self) = @_;
	$self->{qp} //= qparse_new($self); # parse altids
	my @ret = @HELP;
	if (my $user_pfx = $self->{-user_pfx}) {
		push @ret, @$user_pfx;
	}
	\@ret;
}

sub int_val ($$) {
	my ($doc, $col) = @_;
	my $val = $doc->get_value($col) or return; # undefined is '' in Xapian
	sortable_unserialise($val) + 0; # PV => IV conversion
}

sub get_pct ($) { # mset item
	# Capped at "99%" since "100%" takes an extra column in the
	# thread skeleton view.  <xapian/mset.h> says the value isn't
	# very meaningful, anyways.
	my $n = $_[0]->get_percent;
	$n > 99 ? 99 : $n;
}

sub xap_terms ($$;@) {
	my ($pfx, $xdb_or_doc, @docid) = @_; # @docid may be empty ()
	my %ret;
	eval {
		my $end = $xdb_or_doc->termlist_end(@docid);
		my $cur = $xdb_or_doc->termlist_begin(@docid);
		for (; $cur != $end; $cur++) {
			$cur->skip_to($pfx);
			last if $cur == $end;
			my $tn = $cur->get_termname;
			if (index($tn, $pfx) == 0) {
				$ret{substr($tn, length($pfx))} = undef;
			}
		}
	};
	\%ret;
}

1;
debug log:

solving 76a270bc ...
found 76a270bc in public-inbox.git

user/dev discussion of public-inbox itself

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://public-inbox.org/meta
	git clone --mirror http://czquwvybam4bgbro.onion/meta
	git clone --mirror http://hjrcffqmbrq6wope.onion/meta
	git clone --mirror http://ou63pmih66umazou.onion/meta

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V1 meta meta/ https://public-inbox.org/meta \
		meta@public-inbox.org
	public-inbox-index meta

Example config snippet for mirrors.
Newsgroups are available over NNTP:
	nntp://news.public-inbox.org/inbox.comp.mail.public-inbox.meta
	nntp://7fh6tueqddpjyxjmgtdiueylzoqt6pt7hec3pukyptlmohoowvhde4yd.onion/inbox.comp.mail.public-inbox.meta
	nntp://ie5yzdi7fg72h7s4sdcztq5evakq23rdt33mfyfcddc5u3ndnw24ogqd.onion/inbox.comp.mail.public-inbox.meta
	nntp://4uok3hntl7oi7b4uf4rtfwefqeexfzil2w6kgk2jn5z2f764irre7byd.onion/inbox.comp.mail.public-inbox.meta
	nntp://news.gmane.io/gmane.mail.public-inbox.general
 note: .onion URLs require Tor: https://www.torproject.org/

code repositories for project(s) associated with this inbox:

	https://80x24.org/public-inbox.git

AGPL code for this site: git clone https://public-inbox.org/public-inbox.git