#!/usr/bin/perl
-# hyperestraier search engine plugin
+# xapian-omega search engine plugin
package IkiWiki::Plugin::search;
use warnings;
use strict;
-use IkiWiki;
-
-sub import { #{{{
- hook(type => "getopt", id => "hyperestraier",
- call => \&getopt);
- hook(type => "checkconfig", id => "hyperestraier",
- call => \&checkconfig);
- hook(type => "pagetemplate", id => "hyperestraier",
- call => \&pagetemplate);
- hook(type => "delete", id => "hyperestraier",
- call => \&delete);
- hook(type => "change", id => "hyperestraier",
- call => \&change);
- hook(type => "cgi", id => "hyperestraier",
- call => \&cgi);
-} # }}}
-
-sub getopt () { #{{{
- eval q{use Getopt::Long};
- error($@) if $@;
- Getopt::Long::Configure('pass_through');
- GetOptions("estseek=s" => \$config{estseek});
-} #}}}
-
-sub checkconfig () { #{{{
+use IkiWiki 3.00;
+
+sub import {
+ hook(type => "getsetup", id => "search", call => \&getsetup);
+ hook(type => "checkconfig", id => "search", call => \&checkconfig);
+ hook(type => "pagetemplate", id => "search", call => \&pagetemplate);
+ hook(type => "postscan", id => "search", call => \&index);
+ hook(type => "delete", id => "search", call => \&delete);
+ hook(type => "cgi", id => "search", call => \&cgi);
+}
+
+sub getsetup () {
+ return
+ plugin => {
+ safe => 1,
+ rebuild => 1,
+ section => "web",
+ },
+ omega_cgi => {
+ type => "string",
+ example => "/usr/lib/cgi-bin/omega/omega",
+ description => "path to the omega cgi program",
+ safe => 0, # external program
+ rebuild => 0,
+ },
+}
+
+sub checkconfig () {
foreach my $required (qw(url cgiurl)) {
if (! length $config{$required}) {
- error(sprintf(gettext("Must specify %s when using the search plugin"), $required));
+ error(sprintf(gettext("Must specify %s when using the %s plugin"), $required, 'search'));
}
}
-} #}}}
+
+ if (! defined $config{omega_cgi}) {
+ $config{omega_cgi}="/usr/lib/cgi-bin/omega/omega";
+ }
+}
my $form;
-sub pagetemplate (@) { #{{{
+sub pagetemplate (@) {
my %params=@_;
my $page=$params{page};
my $template=$params{template};
$template->param(searchform => $form);
}
-} #}}}
-
-sub delete (@) { #{{{
- debug(gettext("cleaning hyperestraier search index"));
- estcmd("purge -cl");
- estcfg();
-} #}}}
-
-sub change (@) { #{{{
- debug(gettext("updating hyperestraier search index"));
- estcmd("gather -cm -bc -cl -sd",
- map {
- Encode::encode_utf8($config{destdir}."/".$_)
- foreach @{$renderedfiles{pagename($_)}};
- } @_
- );
- estcfg();
-} #}}}
+}
-sub cgi ($) { #{{{
- my $cgi=shift;
+my $scrubber;
+my $stemmer;
+sub index (@) {
+ my %params=@_;
- if (defined $cgi->param('phrase') || defined $cgi->param("navi")) {
- # only works for GET requests
- chdir("$config{wikistatedir}/hyperestraier") || error("chdir: $!");
- exec("./".IkiWiki::basename($config{cgiurl})) || error("estseek.cgi failed");
+ setupfiles();
+
+ # A unique pageterm is used to identify the document for a page.
+ my $pageterm=pageterm($params{page});
+ return $params{content} unless defined $pageterm;
+
+ my $db=xapiandb();
+ my $doc=Search::Xapian::Document->new();
+ my $caption=pagetitle($params{page});
+ my $title;
+ if (exists $pagestate{$params{page}}{meta} &&
+ exists $pagestate{$params{page}}{meta}{title}) {
+ $title=$pagestate{$params{page}}{meta}{title};
+ }
+ else {
+ $title=$caption;
}
-} #}}}
-my $configured=0;
-sub estcfg () { #{{{
- return if $configured;
- $configured=1;
+ # Remove html from text to be indexed.
+ if (! defined $scrubber) {
+ eval q{use HTML::Scrubber};
+ if (! $@) {
+ $scrubber=HTML::Scrubber->new(allow => []);
+ }
+ }
+ my $toindex = defined $scrubber ? $scrubber->scrub($params{content}) : $params{content};
- my $estdir="$config{wikistatedir}/hyperestraier";
- my $cgi=IkiWiki::basename($config{cgiurl});
- $cgi=~s/\..*$//;
-
- my $newfile="$estdir/$cgi.tmpl.new";
- my $cleanup = sub { unlink($newfile) };
- open(TEMPLATE, ">:utf8", $newfile) || error("open $newfile: $!", $cleanup);
- print TEMPLATE IkiWiki::misctemplate("search",
- "<!--ESTFORM-->\n\n<!--ESTRESULT-->\n\n<!--ESTINFO-->\n\n",
- baseurl => IkiWiki::dirname($config{cgiurl})."/") ||
- error("write $newfile: $!", $cleanup);
- close TEMPLATE || error("save $newfile: $!", $cleanup);
- rename($newfile, "$estdir/$cgi.tmpl") ||
- error("rename $newfile: $!", $cleanup);
+ # Take 512 characters for a sample, then extend it out
+ # if it stopped in the middle of a word.
+ my $size=512;
+ my ($sample)=substr($toindex, 0, $size);
+ if (length($sample) == $size) {
+ my $max=length($toindex);
+ my $next;
+ while ($size < $max &&
+ ($next=substr($toindex, $size++, 1)) !~ /\s/) {
+ $sample.=$next;
+ }
+ }
+ $sample=~s/\n/ /g;
- $newfile="$estdir/$cgi.conf";
- open(TEMPLATE, ">$newfile") || error("open $newfile: $!", $cleanup);
- my $template=template("estseek.conf");
- eval q{use Cwd 'abs_path'};
- $template->param(
- index => $estdir,
- tmplfile => "$estdir/$cgi.tmpl",
- destdir => abs_path($config{destdir}),
- url => $config{url},
+ # data used by omega
+ # Decode html entities in it, since omega re-encodes them.
+ eval q{use HTML::Entities};
+ error $@ if $@;
+ $doc->set_data(
+ "url=".urlto($params{page}, "")."\n".
+ "sample=".decode_entities($sample)."\n".
+ "caption=".decode_entities($caption)."\n".
+ "modtime=$IkiWiki::pagemtime{$params{page}}\n".
+ "size=".length($params{content})."\n"
);
- print TEMPLATE $template->output || error("write $newfile: $!", $cleanup);
- close TEMPLATE || error("save $newfile: $!", $cleanup);
- rename($newfile, "$estdir/$cgi.conf") ||
- error("rename $newfile: $!", $cleanup);
-
- $cgi="$estdir/".IkiWiki::basename($config{cgiurl});
- unlink($cgi);
- my $estseek = defined $config{estseek} ? $config{estseek} : '/usr/lib/estraier/estseek.cgi';
- symlink($estseek, $cgi) || error("symlink $estseek $cgi: $!");
-} # }}}
-
-sub estcmd ($;@) { #{{{
- my @params=split(' ', shift);
- push @params, "-cl", "$config{wikistatedir}/hyperestraier";
- if (@_) {
- push @params, "-";
+
+ # Index document and add terms for other metadata.
+ my $tg = Search::Xapian::TermGenerator->new();
+ if (! $stemmer) {
+ my $langcode=$ENV{LANG} || "en";
+ $langcode=~s/_.*//;
+
+ # This whitelist is here to work around a xapian bug (#486138)
+ my @whitelist=qw{da de en es fi fr hu it no pt ru ro sv tr};
+
+ if (grep { $_ eq $langcode } @whitelist) {
+ $stemmer=Search::Xapian::Stem->new($langcode);
+ }
+ else {
+ $stemmer=Search::Xapian::Stem->new("english");
+ }
}
-
- my $pid=open(CHILD, "|-");
- if ($pid) {
- # parent
- foreach (@_) {
- print CHILD "$_\n";
+ $tg->set_stemmer($stemmer);
+ $tg->set_document($doc);
+ $tg->index_text($params{page}, 2);
+ $tg->index_text($caption, 2);
+ $tg->index_text($title, 2) if $title ne $caption;
+ $tg->index_text($toindex);
+ $tg->index_text(lc($title), 1, "S"); # for title:foo
+ foreach my $link (@{$links{$params{page}}}) {
+ $tg->index_text(lc($link), 1, "XLINK"); # for link:bar
+ }
+
+ $doc->add_term($pageterm);
+ $db->replace_document_by_term($pageterm, $doc);
+}
+
+sub delete (@) {
+ my $db=xapiandb();
+ foreach my $page (@_) {
+ my $pageterm=pageterm(pagename($page));
+ $db->delete_document_by_term($pageterm) if defined $pageterm;
+ }
+}
+
+sub cgi ($) {
+ my $cgi=shift;
+
+ if (defined $cgi->param('P')) {
+ # only works for GET requests
+ chdir("$config{wikistatedir}/xapian") || error("chdir: $!");
+ $ENV{OMEGA_CONFIG_FILE}="./omega.conf";
+ $ENV{CGIURL}=$config{cgiurl},
+ IkiWiki::loadindex();
+ $ENV{HELPLINK}=htmllink("", "", "ikiwiki/searching",
+ noimageinline => 1, linktext => "Help");
+ exec($config{omega_cgi}) || error("$config{omega_cgi} failed: $!");
+ }
+}
+
+sub pageterm ($) {
+ my $page=shift;
+
+ # 240 is the number used by omindex to decide when to hash an
+ # overlong term. This does not use a compatible hash method though.
+ if (length $page > 240) {
+ eval q{use Digest::SHA1};
+ if ($@) {
+ debug("search: ".sprintf(gettext("need Digest::SHA1 to index %s"), $page)) if $@;
+ return undef;
}
- close(CHILD) || error("estcmd @params exited nonzero: $?");
+
+ # Note no colon, therefore it's guaranteed to not overlap
+ # with a page with the same name as the hash..
+ return "U".lc(Digest::SHA1::sha1_hex($page));
}
else {
- # child
- open(STDOUT, "/dev/null"); # shut it up (closing won't work)
- exec("estcmd", @params) || error("can't run estcmd");
+ return "U:".$page;
+ }
+}
+
+my $db;
+sub xapiandb () {
+ if (! defined $db) {
+ eval q{
+ use Search::Xapian;
+ use Search::Xapian::WritableDatabase;
+ };
+ error($@) if $@;
+ $db=Search::Xapian::WritableDatabase->new($config{wikistatedir}."/xapian/default",
+ Search::Xapian::DB_CREATE_OR_OPEN());
+ }
+ return $db;
+}
+
+{
+my $setup=0;
+sub setupfiles () {
+ if (! $setup and (! -e $config{wikistatedir}."/xapian" || $config{rebuild})) {
+ writefile("omega.conf", $config{wikistatedir}."/xapian",
+ "database_dir .\n".
+ "template_dir ./templates\n");
+
+ # Avoid omega interpreting anything in the misctemplate
+ # as an omegascript command.
+ my $misctemplate=IkiWiki::misctemplate(gettext("search"), "\0");
+ eval q{use HTML::Entities};
+ error $@ if $@;
+ $misctemplate=encode_entities($misctemplate, '\$');
+
+ my $querytemplate=readfile(IkiWiki::template_file("searchquery.tmpl"));
+ $misctemplate=~s/\0/$querytemplate/;
+
+ writefile("query", $config{wikistatedir}."/xapian/templates",
+ $misctemplate);
+ $setup=1;
}
-} #}}}
+}
+}
1