1 # Copyright (C) 2016-2021 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # git fast-import-based ssoma-mda MDA replacement
5 # This is only ever run by public-inbox-mda, public-inbox-learn
6 # and public-inbox-watch. Not the WWW or NNTP code which only
7 # requires read-only access.
8 package PublicInbox::Import;
10 use parent qw(PublicInbox::Lock);
12 use PublicInbox::Spawn qw(run_die popen_rd);
13 use PublicInbox::MID qw(mids mid2path);
14 use PublicInbox::Address;
15 use PublicInbox::Smsg;
16 use PublicInbox::MsgTime qw(msg_datestamp);
17 use PublicInbox::ContentHash qw(content_digest);
20 use POSIX qw(strftime);
22 sub default_branch () {
23 state $default_branch = do {
24 delete local $ENV{GIT_CONFIG};
25 my $r = popen_rd([qw(git config --global init.defaultBranch)]);
26 chomp(my $h = <$r> // '');
28 $h eq '' ? 'refs/heads/master' : $h;
33 # we can't change arg order, this is documented in POD
34 # and external projects may rely on it:
35 my ($class, $git, $name, $email, $ibx) = @_;
38 $ref = $ibx->{ref_head};
39 $name //= $ibx->{name};
40 $email //= $ibx->{-primary_address};
45 ident => "$name <$email>",
47 ref => $ref // default_branch,
49 path_type => '2/38', # or 'v2'
50 lock_path => "$git->{git_dir}/ssoma.lock", # v2 changes this
55 # idempotent start function
59 return ($self->{in}, $self->{out}) if $self->{in};
61 my ($in_r, $out_r, $out_w);
62 pipe($out_r, $out_w) or die "pipe failed: $!";
66 my ($git, $ref) = @$self{qw(git ref)};
68 chomp($self->{tip} = $git->qx(qw(rev-parse --revs-only), $ref));
69 die "fatal: rev-parse --revs-only $ref: \$?=$?" if $?;
70 if ($self->{path_type} ne '2/38' && $self->{tip}) {
72 my @t = $git->qx(qw(ls-tree -r -z --name-only), $ref);
73 die "fatal: ls-tree -r -z --name-only $ref: \$?=$?" if $?;
75 $self->{-tree} = { map { $_ => 1 } @t };
77 $in_r = $self->{in} = $git->popen(qw(fast-import
78 --quiet --done --date-format=raw),
79 undef, { 0 => $out_r });
81 $self->{out} = $out_w;
91 sub wfail () { die "write to fast-import failed: $!" }
93 sub now_raw () { time . ' +0000' }
97 my $b = $mime->body_raw;
98 $b =~ s/(\r?\n)+\z//s;
102 # only used for v1 (ssoma) inboxes
103 sub _check_path ($$$$) {
104 my ($r, $w, $tip, $path) = @_;
105 return if $tip eq '';
106 print $w "ls $tip $path\n" or wfail;
108 defined(my $info = <$r>) or die "EOF from fast-import: $!";
109 $info =~ /\Amissing / ? undef : $info;
112 sub _cat_blob ($$$) {
113 my ($r, $w, $oid) = @_;
114 print $w "cat-blob $oid\n" or wfail;
117 defined $info or die "EOF from fast-import / cat-blob: $!";
118 $info =~ /\A[a-f0-9]{40,} blob ([0-9]+)\n\z/ or return;
124 $n = read($r, $buf, $left, $offset);
125 defined($n) or die "read cat-blob failed: $!";
126 $n == 0 and die 'fast-export (cat-blob) died';
130 $n = read($r, my $lf, 1);
131 defined($n) or die "read final byte of cat-blob failed: $!";
132 die "bad read on final byte: <$lf>" if $lf ne "\n";
134 # fixup some bugginess in old versions:
135 $buf =~ s/\A[\r\n]*From [^\r\n]*\r?\n//s;
140 my ($self, $oid) = @_;
141 my ($r, $w) = $self->gfi_start;
142 _cat_blob($r, $w, $oid);
145 sub check_remove_v1 {
146 my ($r, $w, $tip, $path, $mime) = @_;
148 my $info = _check_path($r, $w, $tip, $path) or return ('MISSING',undef);
149 $info =~ m!\A100644 blob ([a-f0-9]{40,})\t!s or die "not blob: $info";
151 my $msg = _cat_blob($r, $w, $oid) or die "BUG: cat-blob $1 failed";
152 my $cur = PublicInbox::Eml->new($msg);
153 my $cur_s = $cur->header('Subject');
154 $cur_s = '' unless defined $cur_s;
155 my $cur_m = $mime->header('Subject');
156 $cur_m = '' unless defined $cur_m;
157 if ($cur_s ne $cur_m || norm_body($cur) ne norm_body($mime)) {
158 return ('MISMATCH', $cur);
165 return unless $self->{in};
166 print { $self->{out} } "checkpoint\n" or wfail;
171 my ($self, $msg) = @_;
172 return unless $self->{in};
173 print { $self->{out} } "progress $msg\n" or wfail;
174 readline($self->{in}) eq "progress $msg\n" or die
175 "progress $msg not received\n";
179 sub _update_git_info ($$) {
180 my ($self, $do_gc) = @_;
181 # for compatibility with existing ssoma installations
182 # we can probably remove this entirely by 2020
183 my $git_dir = $self->{git}->{git_dir};
184 my @cmd = ('git', "--git-dir=$git_dir");
185 my $index = "$git_dir/ssoma.index";
186 if (-e $index && !$ENV{FAST}) {
187 my $env = { GIT_INDEX_FILE => $index };
188 run_die([@cmd, qw(read-tree -m -v -i), $self->{ref}], $env);
190 eval { run_die([@cmd, 'update-server-info']) };
191 my $ibx = $self->{ibx};
192 if ($ibx && $ibx->version == 1 && -d "$ibx->{inboxdir}/public-inbox" &&
193 eval { require PublicInbox::SearchIdx }) {
195 my $s = PublicInbox::SearchIdx->new($ibx);
196 $s->index_sync({ ref => $self->{ref} });
198 warn "$ibx->{inboxdir} index failed: $@\n" if $@;
200 eval { run_die([@cmd, qw(gc --auto)]) } if $do_gc;
206 # For safety, we ensure git checkpoint is complete before because
207 # the data in git is still more important than what is in Xapian
208 # in v2. Performance may be gained by delaying the ->progress
209 # call but we lose safety
212 $self->progress('checkpoint');
213 _update_git_info($self, 0);
220 my ($self, $mark) = @_;
221 die "not active\n" unless $self->{in};
222 my ($r, $w) = $self->gfi_start;
223 print $w "get-mark $mark\n" or wfail;
224 defined(my $oid = <$r>) or die "get-mark failed, need git 2.6.0+\n";
229 # returns undef on non-existent
230 # ('MISMATCH', PublicInbox::Eml) on mismatch
231 # (:MARK, PublicInbox::Eml) on success
233 # v2 callers should check with Xapian before calling this as
234 # it is not idempotent.
236 my ($self, $mime, $msg) = @_; # mime = PublicInbox::Eml or Email::MIME
238 my $path_type = $self->{path_type};
239 my ($path, $err, $cur, $blob);
241 my ($r, $w) = $self->gfi_start;
242 my $tip = $self->{tip};
243 if ($path_type eq '2/38') {
244 $path = mid2path(v1_mid0($mime));
245 ($err, $cur) = check_remove_v1($r, $w, $tip, $path, $mime);
246 return ($err, $cur) if $err;
249 if (ref($mime) eq 'SCALAR') { # optimization used by V2Writable
251 } else { # XXX should not be necessary:
252 my $str = $mime->as_string;
255 my $len = length($$sref);
256 $blob = $self->{mark}++;
257 print $w "blob\nmark :$blob\ndata $len\n",
258 $$sref, "\n" or wfail;
261 my $ref = $self->{ref};
262 my $commit = $self->{mark}++;
263 my $parent = $tip =~ /\A:/ ? $tip : undef;
265 print $w "reset $ref\n" or wfail;
267 my $ident = $self->{ident};
270 my $len = length($msg) + 1;
271 print $w "commit $ref\nmark :$commit\n",
272 "author $ident $now\n",
273 "committer $ident $now\n",
274 "data $len\n$msg\n\n",
275 'from ', ($parent ? $parent : $tip), "\n" or wfail;
277 print $w "D $path\n\n" or wfail;
279 clean_tree_v2($self, $w, 'd');
280 print $w "M 100644 :$blob d\n\n" or wfail;
283 (($self->{tip} = ":$commit"), $cur);
286 sub git_timestamp ($) {
287 my ($ts, $zone) = @{$_[0]};
288 $ts = 0 if $ts < 0; # git uses unsigned times
292 sub extract_cmt_info ($;$) {
293 my ($mime, $smsg) = @_;
294 # $mime is PublicInbox::Eml, but remains Email::MIME-compatible
295 $smsg //= bless {}, 'PublicInbox::Smsg';
297 $smsg->populate($mime);
300 my $from = delete($smsg->{From}) // '';
301 my ($email) = PublicInbox::Address::emails($from);
302 my ($name) = PublicInbox::Address::names($from);
303 if (!defined($name) || !defined($email)) {
304 $sender = $mime->header('Sender') // '';
305 $name //= (PublicInbox::Address::names($sender))[0];
306 $email //= (PublicInbox::Address::emails($sender))[0];
308 if (defined $email) {
309 # Email::Address::XS may leave quoted '<' in addresses,
310 # which git-fast-import doesn't like
313 # quiet down wide character warnings with utf8::encode
314 utf8::encode($email);
317 warn "no email in From: $from or Sender: $sender\n";
320 # git gets confused with:
321 # "'A U Thor <u@example.com>' via foo" <foo@example.com>
323 # <CAD0k6qSUYANxbjjbE4jTW4EeVwOYgBD=bXkSu=akiYC_CB7Ffw@mail.gmail.com>
329 warn "no name in From: $from or Sender: $sender\n";
332 my $subject = delete($smsg->{Subject}) // '(no subject)';
333 utf8::encode($subject);
334 my $at = git_timestamp(delete $smsg->{-ds});
335 my $ct = git_timestamp(delete $smsg->{-ts});
336 ("$name <$email>", $at, $ct, $subject);
339 # kill potentially confusing/misleading headers
340 our @UNWANTED_HEADERS = (qw(Bytes Lines Content-Length),
341 qw(Status X-Status));
342 sub drop_unwanted_headers ($) {
344 for (@UNWANTED_HEADERS, @PublicInbox::MDA::BAD_HEADERS) {
345 $eml->header_set($_);
349 # used by V2Writable, too
350 sub append_mid ($$) {
351 my ($hdr, $mid0) = @_;
352 # @cur is likely empty if we need to call this sub, but it could
353 # have random unparseable crap which we'll preserve, too.
354 my @cur = $hdr->header_raw('Message-ID');
355 $hdr->header_set('Message-ID', @cur, "<$mid0>");
360 my $mids = mids($eml);
362 if (!scalar(@$mids)) { # spam often has no Message-ID
363 my $mid0 = digest2mid(content_digest($eml), $eml);
364 append_mid($eml, $mid0);
369 sub clean_tree_v2 ($$$) {
370 my ($self, $w, $keep) = @_;
371 my $tree = $self->{-tree} or return; #v2 only
372 delete $tree->{$keep};
373 foreach (keys %$tree) {
374 print $w "D $_\n" or wfail;
376 %$tree = ($keep => 1);
379 # returns undef on duplicate
380 # returns the :MARK of the most recent commit
382 my ($self, $mime, $check_cb, $smsg) = @_;
384 my ($author, $at, $ct, $subject) = extract_cmt_info($mime, $smsg);
385 my $path_type = $self->{path_type};
387 if ($path_type eq '2/38') {
388 $path = mid2path(v1_mid0($mime));
389 } else { # v2 layout, one file:
393 my ($r, $w) = $self->gfi_start;
394 my $tip = $self->{tip};
395 if ($path_type eq '2/38') {
396 _check_path($r, $w, $tip, $path) and return;
399 drop_unwanted_headers($mime);
403 $mime = $check_cb->($mime, $self->{ibx}) or return;
406 my $blob = $self->{mark}++;
407 my $raw_email = $mime->{-public_inbox_raw} // $mime->as_string;
408 my $n = length($raw_email);
409 $self->{bytes_added} += $n;
410 print $w "blob\nmark :$blob\ndata ", $n, "\n" or wfail;
411 print $w $raw_email, "\n" or wfail;
413 # v2: we need this for Xapian
415 $smsg->{blob} = $self->get_mark(":$blob");
416 $smsg->set_bytes($raw_email, $n);
417 if (my $oidx = delete $smsg->{-oidx}) { # used by LeiStore
418 return if $oidx->blob_exists($smsg->{blob});
421 my $ref = $self->{ref};
422 my $commit = $self->{mark}++;
423 my $parent = $tip =~ /\A:/ ? $tip : undef;
426 print $w "reset $ref\n" or wfail;
429 print $w "commit $ref\nmark :$commit\n",
430 "author $author $at\n",
431 "committer $self->{ident} $ct\n" or wfail;
432 print $w "data ", (length($subject) + 1), "\n",
433 $subject, "\n\n" or wfail;
435 print $w 'from ', ($parent ? $parent : $tip), "\n" or wfail;
437 clean_tree_v2($self, $w, $path);
438 print $w "M 100644 :$blob $path\n\n" or wfail;
440 $self->{tip} = ":$commit";
443 my @INIT_FILES = ('HEAD' => undef, # filled in at runtime
444 'description' => <<EOD,
445 Unnamed repository; edit this file 'description' to name the repository.
449 repositoryFormatVersion = 0
457 my ($dir, $head) = @_; # or self
458 $dir = $dir->{git}->{git_dir} if ref($dir);
460 File::Path::mkpath([ map { "$dir/$_" } qw(objects/info refs/heads) ]);
461 $INIT_FILES[1] //= 'ref: '.default_branch."\n";
462 my @fn_contents = @INIT_FILES;
463 $fn_contents[1] = "ref: refs/heads/$head\n" if defined $head;
464 while (my ($fn, $contents) = splice(@fn_contents, 0, 2)) {
465 my $f = $dir.'/'.$fn;
467 open my $fh, '>', $f or die "open $f: $!";
468 print $fh $contents or die "print $f: $!";
469 close $fh or die "close $f: $!";
473 # true if locked and active
474 sub active { !!$_[0]->{out} }
478 my $w = delete $self->{out} or return;
480 my $r = delete $self->{in} or die 'BUG: missing {in} when done';
481 print $w "done\n" or wfail;
482 close $r or die "fast-import failed: $?"; # ProcessPipe::CLOSE
485 my $nchg = delete $self->{nchg};
486 if ($nchg && !$wait_err) {
487 eval { _update_git_info($self, 1) };
488 warn "E: $self->{git}->{git_dir} update info: $@\n" if $@;
490 $self->lock_release(!!$nchg);
491 $self->{git}->cleanup;
492 die $wait_err if $wait_err;
497 foreach my $f (qw(in out)) {
498 next unless defined($self->{$f});
499 close $self->{$f} or die "failed to close import[$f]: $!\n";
503 sub digest2mid ($$) {
504 my ($dig, $hdr) = @_;
505 my $b64 = $dig->clone->b64digest;
506 # Make our own URLs nicer:
507 # See "Base 64 Encoding with URL and Filename Safe Alphabet" in RFC4648
510 # Add a date prefix to prevent a leading '-' in case that trips
511 # up some tools (e.g. if a Message-ID were a expected as a
513 my $dt = msg_datestamp($hdr);
514 $dt = POSIX::strftime('%Y%m%d%H%M%S', gmtime($dt));
518 sub rewrite_commit ($$$$) {
519 my ($self, $oids, $buf, $mime) = @_;
520 my ($author, $at, $ct, $subject);
522 ($author, $at, $ct, $subject) = extract_cmt_info($mime);
525 $subject = 'purged '.join(' ', @$oids);
529 foreach my $i (0..$#$buf) {
531 if ($l =~ /^author .* ([0-9]+ [\+-]?[0-9]+)$/) {
533 $buf->[$i] = "author $author $at\n";
534 } elsif ($l =~ /^committer .* ([0-9]+ [\+-]?[0-9]+)$/) {
536 $buf->[$i] = "committer $self->{ident} $ct\n";
537 } elsif ($l =~ /^data ([0-9]+)/) {
538 $buf->[$i++] = "data " . length($subject) . "\n";
539 $buf->[$i] = $subject;
545 # returns the new commit OID if a replacement was done
546 # returns undef if nothing was done
548 my ($self, $mime, $replace_map) = @_; # oid => raw string
549 my $tmp = "refs/heads/replace-".((keys %$replace_map)[0]);
550 my $old = $self->{'ref'};
551 my $git = $self->{git};
552 my @export = (qw(fast-export --no-data --use-done-feature), $old);
553 my $rd = $git->popen(@export);
554 my ($r, $w) = $self->gfi_start;
559 my $tree = $self->{-tree};
561 if (/^reset (?:.+)/) {
562 push @buf, "reset $tmp\n";
563 } elsif (/^commit (?:.+)/) {
565 print $w @buf or wfail;
568 push @buf, "commit $tmp\n";
569 } elsif (/^data ([0-9]+)/) {
570 # only commit message, so $len is small:
571 my $len = $1; # + 1 for trailing "\n"
573 my $n = read($rd, my $buf, $len) or die "read: $!";
574 $len == $n or die "short read ($n < $len)";
576 } elsif (/^M 100644 ([a-f0-9]+) (\w+)/) {
577 my ($oid, $path) = ($1, $2);
579 my $sref = $replace_map->{$oid};
582 my $n = length($$sref);
583 push @buf, "M 100644 inline $path\ndata $n\n";
584 push @buf, $$sref; # hope CoW works...
589 } elsif (/^D (\w+)/) {
591 push @buf, $_ if $tree->{$path};
592 } elsif ($_ eq "\n") {
595 my $out = join('', @buf);
597 warn "purge rewriting\n", $out, "\n";
599 rewrite_commit($self, \@oids, \@buf, $mime);
602 print $w @buf, "\n" or wfail;
604 } elsif ($_ eq "done\n") {
606 } elsif (/^mark :([0-9]+)$/) {
613 close $rd or die "close fast-export failed: $?";
615 print $w @buf or wfail;
617 die 'done\n not seen from fast-export' unless $done;
618 chomp(my $cmt = $self->get_mark(":$mark")) if $nreplace;
619 $self->{nchg} = 0; # prevent _update_git_info until update-ref:
621 my @git = ('git', "--git-dir=$git->{git_dir}");
623 run_die([@git, qw(update-ref), $old, $tmp]) if $nreplace;
625 run_die([@git, qw(update-ref -d), $tmp]);
627 return if $nreplace == 0;
629 run_die([@git, qw(-c gc.reflogExpire=now gc --prune=all --quiet)]);
631 # check that old OIDs are gone
633 foreach my $oid (keys %$replace_map) {
634 my @info = $git->check($oid);
636 warn "$oid not replaced\n";
640 _update_git_info($self, 0);
641 die "Failed to replace $err object(s)\n" if $err;
651 PublicInbox::Import - message importer for public-inbox v1 inboxes
659 use PublicInbox::Eml;
660 # PublicInbox::Eml exists as of public-inbox 1.5.0,
661 # Email::MIME was used in older versions
663 use PublicInbox::Git;
664 use PublicInbox::Import;
666 chomp(my $git_dir = `git rev-parse --git-dir`);
667 $git_dir or die "GIT_DIR= must be specified\n";
668 my $git = PublicInbox::Git->new($git_dir);
669 my @committer = ('inbox', 'inbox@example.org');
670 my $im = PublicInbox::Import->new($git, @committer);
673 my $message = "From: <u\@example.org>\n".
674 "Subject: test message \n" .
675 "Date: Thu, 01 Jan 1970 00:00:00 +0000\n" .
676 "Message-ID: <m\@example.org>\n".
678 my $parsed = PublicInbox::Eml->new($message);
679 my $ret = $im->add($parsed);
681 warn "duplicate: ", $parsed->header_raw('Message-ID'), "\n";
683 print "imported at mark $ret\n";
687 # to remove a message
688 my $junk = PublicInbox::Eml->new($message);
689 my ($mark, $orig) = $im->remove($junk);
690 if ($mark eq 'MISSING') {
692 } elsif ($mark eq 'MISMATCH') {
693 print "Message exists but does not match\n\n",
694 $orig->as_string, "\n",;
696 print "removed at mark $mark\n\n",
697 $orig->as_string, "\n";
703 An importer and remover for public-inboxes which takes C<PublicInbox::Eml>
704 or L<Email::MIME> messages as input and stores them in a git repository as
705 documented in L<https://public-inbox.org/public-inbox-v1-format.txt>,
706 except it does not allow duplicate Message-IDs.
708 It requires L<git(1)> and L<git-fast-import(1)> to be installed.
716 my $im = PublicInbox::Import->new($git, @committer);
718 Initialize a new PublicInbox::Import object.
722 my $parsed = PublicInbox::Eml->new($message);
725 Adds a message to to the git repository. This will acquire
726 C<$GIT_DIR/ssoma.lock> and start L<git-fast-import(1)> if necessary.
728 Messages added will not be visible to other processes until L</done>
729 is called, but L</remove> may be called on them.
733 my $junk = PublicInbox::Eml->new($message);
734 my ($code, $orig) = $im->remove($junk);
736 Removes a message from the repository. On success, it returns
737 a ':'-prefixed numeric code representing the git-fast-import
738 mark and the original messages as a PublicInbox::Eml
739 (or Email::MIME) object.
740 If the message could not be found, the code is "MISSING"
741 and the original message is undef. If there is a mismatch where
742 the "Message-ID" is matched but the subject and body do not match,
743 the returned code is "MISMATCH" and the conflicting message
748 Finalizes the L<git-fast-import(1)> and unlocks the repository.
749 Calling this is required to finalize changes to a repository.
757 All feedback welcome via plain-text mail to L<mailto:meta@public-inbox.org>
759 The mail archives are hosted at L<https://public-inbox.org/meta/>
763 Copyright (C) 2016-2020 all contributors L<mailto:meta@public-inbox.org>
765 License: AGPL-3.0+ L<http://www.gnu.org/licenses/agpl-3.0.txt>