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Diffstat (limited to 'lib/PublicInbox/LeiP2q.pm')
| -rw-r--r-- | lib/PublicInbox/LeiP2q.pm | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/lib/PublicInbox/LeiP2q.pm b/lib/PublicInbox/LeiP2q.pm new file mode 100644 index 00000000..68faa016 --- /dev/null +++ b/lib/PublicInbox/LeiP2q.pm @@ -0,0 +1,198 @@ +# Copyright (C) all contributors <meta@public-inbox.org> +# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt> + +# front-end for the "lei patch-to-query" sub-command +package PublicInbox::LeiP2q; +use strict; +use v5.10.1; +use parent qw(PublicInbox::IPC PublicInbox::LeiInput); +use PublicInbox::Eml; +use PublicInbox::Smsg; +use PublicInbox::MsgIter qw(msg_part_text); +use PublicInbox::Git qw(git_unquote); +use PublicInbox::OnDestroy; +use URI::Escape qw(uri_escape_utf8); +my $FN = qr!((?:"?[^/\n]+/[^\r\n]+)|/dev/null)!; + +sub xphrase ($) { + my ($s) = @_; + return () unless $s =~ /\S/; + # cf. xapian-core/queryparser/queryparser.lemony + # [\./:\\\@] - is_phrase_generator (implicit phrase search) + # FIXME not really sure about these..., we basically want to + # extract the longest phrase possible that Xapian can handle + map { + s/\A\s*//; + s/\s+\z//; + m![^\./:\\\@\-\w]! ? qq("$_") : $_ ; + } ($s =~ m!(\w[\|=><,\./:\\\@\-\w\s]+)!g); +} + +sub add_qterm ($$@) { + my ($self, $p, @v) = @_; + for (@v) { + $self->{qseen}->{"$p\0$_"} //= + push(@{$self->{qterms}->{$p}}, $_); + } +} + +sub extract_terms { # eml->each_part callback + my ($p, $self) = @_; + my $part = $p->[0]; # ignore $depth and @idx; + my $ct = $part->content_type || 'text/plain'; + my ($s, undef) = msg_part_text($part, $ct); + defined $s or return; + my $in_diff; + # TODO: b: nq: q: + for (split(/\n/, $s)) { + if ($in_diff && s/^ //) { # diff context + add_qterm($self, 'dfctx', xphrase($_)); + } elsif (/^-- $/) { # email signature begins + $in_diff = undef; + } elsif (m!^diff --git $FN $FN!) { + # wait until "---" and "+++" to capture filenames + $in_diff = 1; + } elsif (/^index ([a-f0-9]+)\.\.([a-f0-9]+)\b/) { + my ($oa, $ob) = ($1, $2); + add_qterm($self, 'dfpre', $oa); + add_qterm($self, 'dfpost', $ob); + # who uses dfblob? + } elsif (m!^(?:---|\+{3}) ($FN)!) { + next if $1 eq '/dev/null'; + my $fn = (split(m!/!, git_unquote($1.''), 2))[1]; + add_qterm($self, 'dfn', xphrase($fn)); + } elsif ($in_diff && s/^\+//) { # diff added + add_qterm($self, 'dfb', xphrase($_)); + } elsif ($in_diff && s/^-//) { # diff removed + add_qterm($self, 'dfa', xphrase($_)); + } elsif (/^@@ (?:\S+) (?:\S+) @@\s*$/) { + # traditional diff w/o -p + } elsif (/^@@ (?:\S+) (?:\S+) @@\s*(\S+.*)/) { + add_qterm($self, 'dfhh', xphrase($1)); + } elsif (/^(?:dis)similarity index/ || + /^(?:old|new) mode/ || + /^(?:deleted|new) file mode/ || + /^(?:copy|rename) (?:from|to) / || + /^(?:dis)?similarity index / || + /^\\ No newline at end of file/ || + /^Binary files .* differ/) { + } elsif ($_ eq '') { + # possible to be in diff context, some mail may be + # stripped by MUA or even GNU diff(1). "git apply" + # treats a bare "\n" as diff context, too + } else { + $in_diff = undef; + } + } +} + +my %pfx2smsg = ( + t => [ qw(to) ], + c => [ qw(cc) ], + f => [ qw(from) ], + tc => [ qw(to cc) ], + tcf => [ qw(to cc from) ], + a => [ qw(to cc from) ], + s => [ qw(subject) ], + bs => [ qw(subject) ], # body handled elsewhere + d => [ qw(ds) ], # nonsense? + dt => [ qw(ds) ], # ditto... + rt => [ qw(ts) ], # ditto... +); + +sub input_eml_cb { # used by PublicInbox::LeiInput::input_fh + my ($self, $eml) = @_; + my $diff_want = $self->{diff_want} // do { + my $want = $self->{lei}->{opt}->{want} // [ qw(dfpost7) ]; + my @want = split(/[, ]+/, "@$want"); + for (@want) { + /\A(?:(d|dt|rt):)?([0-9]+)(\.(?:day|weeks)s?)?\z/ + or next; + my ($pfx, $n, $unit) = ($1, $2, $3); + $n *= 86400 * ($unit =~ /week/i ? 7 : 1); + $_ = [ $pfx, $n ]; + } + $self->{want_order} = \@want; + $self->{diff_want} = +{ map { $_ => 1 } @want }; + }; + my $smsg = bless {}, 'PublicInbox::Smsg'; + $smsg->populate($eml); + while (my ($pfx, $fields) = each %pfx2smsg) { + next unless $diff_want->{$pfx}; + for my $f (@$fields) { + my $v = $smsg->{$f} // next; + add_qterm($self, $pfx, xphrase($v)); + } + } + $eml->each_part(\&extract_terms, $self, 1); +} + +sub emit_query { + my ($self) = @_; + my $lei = $self->{lei}; + if ($lei->{opt}->{debug}) { + my $json = ref(PublicInbox::Config->json)->new; + $json->utf8->canonical->pretty; + print { $lei->{2} } $json->encode($self->{qterms}); + } + my (@q, %seen); + for my $pfx (@{$self->{want_order}}) { + if (ref($pfx) eq 'ARRAY') { + my ($p, $t_range) = @$pfx; # TODO + + } elsif ($pfx =~ m!\A(?:OR|XOR|AND|NOT)\z! || + $pfx =~ m!\A(?:ADJ|NEAR)(?:/[0-9]+)?\z!) { + push @q, $pfx; + } else { + my $plusminus = ($pfx =~ s/\A([\+\-])//) ? $1 : ''; + my $end = ($pfx =~ s/([0-9\*]+)\z//) ? $1 : ''; + my $x = delete($self->{qterms}->{$pfx}) or next; + my $star = $end =~ tr/*//d ? '*' : ''; + my $min_len = ($end || 0) + 0; + + # no wildcards for bool_pfx_external + $star = '' if $pfx =~ /\A(dfpre|dfpost|mid)\z/; + $pfx = "$plusminus$pfx:"; + if ($min_len) { + push @q, map { + my @t = ($pfx.$_.$star); + while (length > $min_len) { + chop $_; + push @t, 'OR', $pfx.$_.$star; + } + @t; + } @$x; + } else { + push @q, map { + my $k = $pfx.$_.$star; + $seen{$k}++ ? () : $k + } @$x; + } + } + } + if ($lei->{opt}->{uri}) { + @q = (join('+', map { uri_escape_utf8($_) } @q)); + } else { + @q = (join(' ', @q)); + } + $lei->out(@q, "\n"); +} + +sub lei_p2q { # the "lei patch-to-query" entry point + my ($lei, @inputs) = @_; + $lei->{opt}->{'in-format'} //= 'eml' if $lei->{opt}->{stdin}; + my $self = bless { missing_ok => 1 }, __PACKAGE__; + $self->prepare_inputs($lei, \@inputs) or return; + $lei->wq1_start($self); +} + +sub ipc_atfork_child { + my ($self) = @_; + PublicInbox::LeiInput::input_only_atfork_child($self); + on_destroy \&emit_query, $self; +} + +no warnings 'once'; +*net_merge_all_done = \&PublicInbox::LeiInput::input_only_net_merge_all_done; + +1; |