Merge branch 'master' of ssh://git.ikiwiki.info

[git.ikiwiki.info.git] / IkiWiki / Plugin / search.pm

diff --git a/IkiWiki/Plugin/search.pm b/IkiWiki/Plugin/search.pm
index 70d05d5a0fbe287946df41b120b16e4f87d02d31..24b16fe2a78c4607f89788cd78ea1d7e5a1ac137 100644 (file)
--- a/IkiWiki/Plugin/search.pm
+++ b/IkiWiki/Plugin/search.pm
@@ -1,43 +1,65 @@
 #!/usr/bin/perl
 #!/usr/bin/perl

-# hyperestraier search engine plugin
+# xapian-omega search engine plugin

 package IkiWiki::Plugin::search;
 
 use warnings;
 use strict;
 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 => "indexhtml", id => "search", call => \&indexhtml);
+       hook(type => "delete", id => "search", call => \&delete);
+       hook(type => "cgi", id => "search", call => \&cgi);
+       hook(type => "disable", id => "search", call => \&disable);
+       hook(type => "needsbuild", id => "search", call => \&needsbuild);
+               
+       eval q{ use Search::Xapian }; # load early to work around #622591
+}
+
+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,
+               },
+               google_search => {
+                       type => "booblean",
+                       example => 1,
+                       description => "use google site search rather than internal xapian index?",
+                       safe => 1,
+                       rebuild => 0,
+               },
+}
+
+sub checkconfig () {

        foreach my $required (qw(url cgiurl)) {
                if (! length $config{$required}) {
        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";
+       }
+
+       # This is a mass dependency, so if the search form template
+       # changes, every page is rebuilt.
+       add_depends("", "templates/searchform.tmpl");
+}

 
 my $form;
 
 my $form;

-sub pagetemplate (@) { #{{{
+sub pagetemplate (@) {

        my %params=@_;
        my $page=$params{page};
        my $template=$params{template};
        my %params=@_;
        my $page=$params{page};
        my $template=$params{template};


@@ -46,102 +68,222 @@ sub pagetemplate (@) { #{{{
        if ($template->query(name => "searchform")) {
                if (! defined $form) {
                        my $searchform = template("searchform.tmpl", blind_cache => 1);
        if ($template->query(name => "searchform")) {
                if (! defined $form) {
                        my $searchform = template("searchform.tmpl", blind_cache => 1);

-                       $searchform->param(searchaction => $config{cgiurl});
+                       $searchform->param(searchaction => IkiWiki::cgiurl());
+                       $searchform->param(html5 => $config{html5});

                        $form=$searchform->output;
                }
 
                $template->param(searchform => $form);
        }
                        $form=$searchform->output;
                }
 
                $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 indexhtml (@) {
+       my %params=@_;
+
+       return if $config{google_search};

 
 

-       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 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},
+       my $url=urlto($params{destpage}, "");
+       if (defined $pagestate{$params{page}}{meta}{permalink}) {
+               $url=$pagestate{$params{page}}{meta}{permalink}
+       }
+
+       # data used by omega
+       # Decode html entities in it, since omega re-encodes them.
+       eval q{use HTML::Entities};
+       error $@ if $@;
+       $doc->set_data(
+               "url=".$url."\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 (@) {
+       return if $config{google_search};
+
+       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 $cgi->param('P')) {
+               if ($config{google_search}) {
+                       print $cgi->redirect("https://www.google.com/search?sitesearch=$config{url}&q=".$cgi->param('P'));
+                       exit 0;
+               }
+               else {
+                       # only works for GET requests
+                       chdir("$config{wikistatedir}/xapian") || error("chdir: $!");
+                       $ENV{OMEGA_CONFIG_FILE}="./omega.conf";
+                       $ENV{CGIURL}=IkiWiki::cgiurl();
+                       IkiWiki::loadindex();
+                       $ENV{HELPLINK}=htmllink("", "", "ikiwiki/searching",
+                               noimageinline => 1, linktext => "Help");
+                       exec($config{omega_cgi}) || error("$config{omega_cgi} failed: $!");

                }
                }

-               close(CHILD) || print STDERR "estcmd @params exited nonzero: $?\n";
+       }
+}
+
+sub pageterm ($) {
+       my $page=shift;
+
+       # 240 is the number used by omindex to decide when to hash an
+       # overlong term. This does not use a compatible hash method though.
+       eval q{use Encode};
+       if (length encode_utf8($page) > 240) {
+               eval q{use Digest::SHA};
+               if ($@) {
+                       debug("search: ".sprintf(gettext("need Digest::SHA to index %s"), $page)) if $@;
+                       return undef;
+               }
+
+               # Note no colon, therefore it's guaranteed to not overlap
+               # with a page with the same name as the hash..
+               return "U".lc(Digest::SHA::sha1_hex($page));

        }
        else {
        }
        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");
+               omega_template();       
+               $setup=1;
+       }
+}
+}
+
+sub needsbuild {
+       my $list=shift;
+       if (grep {
+               $_ eq "templates/page.tmpl" ||
+               $_ eq "templates/searchquery.tmpl"
+       } @$list) {
+               omega_template();
+       }
+}
+
+sub omega_template {
+       # Avoid omega interpreting anything in the cgitemplate
+       # as an omegascript command.
+       eval q{use IkiWiki::CGI};
+       my $template=IkiWiki::cgitemplate(undef, gettext("search"), "\0",
+               searchform => "", # avoid showing the small search form
+       );
+       eval q{use HTML::Entities};
+       error $@ if $@;
+       $template=encode_entities($template, '\$');
+
+       my $querytemplate=readfile(IkiWiki::template_file("searchquery.tmpl"));
+       $template=~s/\0/$querytemplate/;
+       writefile("query", $config{wikistatedir}."/xapian/templates",
+               $template);
+}
+
+sub disable () {
+       if (-d $config{wikistatedir}."/xapian") {
+               system("rm", "-rf", $config{wikistatedir}."/xapian");

        }
        }

-} #}}}
+}

 
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