Major code reoganisation, splitting up the single big file. The two goals
[ikiwiki.git] / ikiwiki
diff --git a/ikiwiki b/ikiwiki
index d9dddbe4e6ea99a287c517b8b4070ca312ba23c0..cdc5c8ca4e372d29cdb717bc726ac87c2a4d0aa5 100755 (executable)
--- a/ikiwiki
+++ b/ikiwiki
@@ -2,6 +2,9 @@
 
 $ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
 
 
 $ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
 
+use lib '.'; # For use without installation, removed by Makefile.
+
+package IkiWiki;
 use warnings;
 use strict;
 use Memoize;
 use warnings;
 use strict;
 use Memoize;
@@ -9,7 +12,7 @@ use File::Spec;
 use HTML::Template;
 use Getopt::Long;
 
 use HTML::Template;
 use Getopt::Long;
 
-my (%links, %oldlinks, %oldpagemtime, %renderedfiles, %pagesources);
+use vars qw{%config %links %oldlinks %oldpagemtime %renderedfiles %pagesources};
 
 # Holds global config settings, also used by some modules.
 our %config=( #{{{
 
 # Holds global config settings, also used by some modules.
 our %config=( #{{{
@@ -41,7 +44,7 @@ GetOptions( #{{{
        "wikiname=s" => \$config{wikiname},
        "verbose|v!" => \$config{verbose},
        "rebuild!" => \$config{rebuild},
        "wikiname=s" => \$config{wikiname},
        "verbose|v!" => \$config{verbose},
        "rebuild!" => \$config{rebuild},
-       "wrapper=s" => sub { $config{wrapper}=$_[1] ? $_[1] : "ikiwiki-wrap" },
+       "wrapper:s" => sub { $config{wrapper}=$_[1] ? $_[1] : "ikiwiki-wrap" },
        "wrappermode=i" => \$config{wrappermode},
        "svn!" => \$config{svn},
        "anonok!" => \$config{anonok},
        "wrappermode=i" => \$config{wrappermode},
        "svn!" => \$config{svn},
        "anonok!" => \$config{anonok},
@@ -69,8 +72,18 @@ sub checkoptions { #{{{
        if ($config{cgi} && ! length $config{url}) {
                error("Must specify url to wiki with --url when using --cgi");
        }
        if ($config{cgi} && ! length $config{url}) {
                error("Must specify url to wiki with --url when using --cgi");
        }
+       
        $config{wikistatedir}="$config{srcdir}/.ikiwiki"
                unless exists $config{wikistatedir};
        $config{wikistatedir}="$config{srcdir}/.ikiwiki"
                unless exists $config{wikistatedir};
+       
+       if ($config{svn}) {
+               require IkiWiki::RCS::SVN;
+               $config{rcs}=1;
+       }
+       else {
+               require IkiWiki::RCS::Stub;
+               $config{rcs}=0;
+       }
 } #}}}
 
 sub usage { #{{{
 } #}}}
 
 sub usage { #{{{
@@ -95,12 +108,6 @@ sub debug ($) { #{{{
        }
 } #}}}
 
        }
 } #}}}
 
-sub mtime ($) { #{{{
-       my $page=shift;
-       
-       return (stat($page))[9];
-} #}}}
-
 sub possibly_foolish_untaint { #{{{
        my $tainted=shift;
        my ($untainted)=$tainted=~/(.*)/;
 sub possibly_foolish_untaint { #{{{
        my $tainted=shift;
        my ($untainted)=$tainted=~/(.*)/;
@@ -185,19 +192,6 @@ sub writefile ($$) { #{{{
        close OUT;
 } #}}}
 
        close OUT;
 } #}}}
 
-sub findlinks ($$) { #{{{
-       my $content=shift;
-       my $page=shift;
-
-       my @links;
-       while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
-               push @links, lc($1);
-       }
-       # Discussion links are a special case since they're not in the text
-       # of the page, but on its template.
-       return @links, "$page/discussion";
-} #}}}
-
 sub bestlink ($$) { #{{{
        # Given a page and the text of a link on the page, determine which
        # existing page that link best points to. Prefers pages under a
 sub bestlink ($$) { #{{{
        # Given a page and the text of a link on the page, determine which
        # existing page that link best points to. Prefers pages under a
@@ -264,166 +258,10 @@ sub htmllink { #{{{
        return "<a href=\"$bestlink\">$link</a>";
 } #}}}
 
        return "<a href=\"$bestlink\">$link</a>";
 } #}}}
 
-sub linkify ($$) { #{{{
-       my $content=shift;
-       my $page=shift;
-
-       $content =~ s{(\\?)$config{wiki_link_regexp}}{
-               $1 ? "[[$2]]" : htmllink($page, $2)
-       }eg;
-       
-       return $content;
-} #}}}
-
-sub htmlize ($$) { #{{{
-       my $type=shift;
-       my $content=shift;
-       
-       if (! $INC{"/usr/bin/markdown"}) {
-               no warnings 'once';
-               $blosxom::version="is a proper perl module too much to ask?";
-               use warnings 'all';
-               do "/usr/bin/markdown";
-       }
-       
-       if ($type eq '.mdwn') {
-               return Markdown::Markdown($content);
-       }
-       else {
-               error("htmlization of $type not supported");
-       }
-} #}}}
-
-sub backlinks ($) { #{{{
-       my $page=shift;
-
-       my @links;
-       foreach my $p (keys %links) {
-               next if bestlink($page, $p) eq $page;
-               if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
-                       my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
-                       
-                       # Trim common dir prefixes from both pages.
-                       my $p_trimmed=$p;
-                       my $page_trimmed=$page;
-                       my $dir;
-                       1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
-                               defined $dir &&
-                               $p_trimmed=~s/^\Q$dir\E// &&
-                               $page_trimmed=~s/^\Q$dir\E//;
-                                      
-                       push @links, { url => $href, page => $p_trimmed };
-               }
-       }
-
-       return sort { $a->{page} cmp $b->{page} } @links;
-} #}}}
-       
-sub parentlinks ($) { #{{{
-       my $page=shift;
-       
-       my @ret;
-       my $pagelink="";
-       my $path="";
-       my $skip=1;
-       foreach my $dir (reverse split("/", $page)) {
-               if (! $skip) {
-                       $path.="../";
-                       unshift @ret, { url => "$path$dir.html", page => $dir };
-               }
-               else {
-                       $skip=0;
-               }
-       }
-       unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
-       return @ret;
-} #}}}
-
 sub indexlink () { #{{{
        return "<a href=\"$config{url}\">$config{wikiname}</a>";
 } #}}}
 
 sub indexlink () { #{{{
        return "<a href=\"$config{url}\">$config{wikiname}</a>";
 } #}}}
 
-sub finalize ($$$) { #{{{
-       my $content=shift;
-       my $page=shift;
-       my $mtime=shift;
-
-       my $title=basename($page);
-       $title=~s/_/ /g;
-       
-       my $template=HTML::Template->new(blind_cache => 1,
-               filename => "$config{templatedir}/page.tmpl");
-       
-       if (length $config{cgiurl}) {
-               $template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
-               $template->param(prefsurl => "$config{cgiurl}?do=prefs");
-               if ($config{svn}) {
-                       $template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
-               }
-       }
-
-       if (length $config{historyurl}) {
-               my $u=$config{historyurl};
-               $u=~s/\[\[file\]\]/$pagesources{$page}/g;
-               $template->param(historyurl => $u);
-       }
-       
-       $template->param(
-               title => $title,
-               wikiname => $config{wikiname},
-               parentlinks => [parentlinks($page)],
-               content => $content,
-               backlinks => [backlinks($page)],
-               discussionlink => htmllink($page, "Discussion", 1, 1),
-               mtime => scalar(gmtime($mtime)),
-       );
-       
-       return $template->output;
-} #}}}
-
-sub check_overwrite ($$) { #{{{
-       # Important security check. Make sure to call this before saving
-       # any files to the source directory.
-       my $dest=shift;
-       my $src=shift;
-       
-       if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
-               error("$dest already exists and was rendered from ".
-                       join(" ",(grep { $renderedfiles{$_} eq $dest } keys
-                               %renderedfiles)).
-                       ", before, so not rendering from $src");
-       }
-} #}}}
-
-sub render ($) { #{{{
-       my $file=shift;
-       
-       my $type=pagetype($file);
-       my $content=readfile("$config{srcdir}/$file");
-       if ($type ne 'unknown') {
-               my $page=pagename($file);
-               
-               $links{$page}=[findlinks($content, $page)];
-               
-               $content=linkify($content, $page);
-               $content=htmlize($type, $content);
-               $content=finalize($content, $page,
-                       mtime("$config{srcdir}/$file"));
-               
-               check_overwrite("$config{destdir}/".htmlpage($page), $page);
-               writefile("$config{destdir}/".htmlpage($page), $content);
-               $oldpagemtime{$page}=time;
-               $renderedfiles{$page}=htmlpage($page);
-       }
-       else {
-               $links{$file}=[];
-               check_overwrite("$config{destdir}/$file", $file);
-               writefile("$config{destdir}/$file", $content);
-               $oldpagemtime{$file}=time;
-               $renderedfiles{$file}=$file;
-       }
-} #}}}
-
 sub lockwiki () { #{{{
        # Take an exclusive lock on the wiki to prevent multiple concurrent
        # run issues. The lock will be dropped on program exit.
 sub lockwiki () { #{{{
        # Take an exclusive lock on the wiki to prevent multiple concurrent
        # run issues. The lock will be dropped on program exit.
@@ -478,388 +316,6 @@ sub saveindex () { #{{{
        close OUT;
 } #}}}
 
        close OUT;
 } #}}}
 
-sub rcs_update () { #{{{
-       if (-d "$config{srcdir}/.svn") {
-               if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
-                       warn("svn update failed\n");
-               }
-       }
-} #}}}
-
-sub rcs_prepedit ($) { #{{{
-       # Prepares to edit a file under revision control. Returns a token
-       # that must be passed into rcs_commit when the file is ready
-       # for committing.
-       # The file is relative to the srcdir.
-       my $file=shift;
-       
-       if (-d "$config{srcdir}/.svn") {
-               # For subversion, return the revision of the file when
-               # editing begins.
-               my $rev=svn_info("Revision", "$config{srcdir}/$file");
-               return defined $rev ? $rev : "";
-       }
-} #}}}
-
-sub rcs_commit ($$$) { #{{{
-       # Tries to commit the page; returns undef on _success_ and
-       # a version of the page with the rcs's conflict markers on failure.
-       # The file is relative to the srcdir.
-       my $file=shift;
-       my $message=shift;
-       my $rcstoken=shift;
-
-       if (-d "$config{srcdir}/.svn") {
-               # Check to see if the page has been changed by someone
-               # else since rcs_prepedit was called.
-               my ($oldrev)=$rcstoken=~/^([0-9]+)$/; # untaint
-               my $rev=svn_info("Revision", "$config{srcdir}/$file");
-               if (defined $rev && defined $oldrev && $rev != $oldrev) {
-                       # Merge their changes into the file that we've
-                       # changed.
-                       chdir($config{srcdir}); # svn merge wants to be here
-                       if (system("svn", "merge", "--quiet", "-r$oldrev:$rev",
-                                  "$config{srcdir}/$file") != 0) {
-                               warn("svn merge -r$oldrev:$rev failed\n");
-                       }
-               }
-
-               if (system("svn", "commit", "--quiet", "-m",
-                          possibly_foolish_untaint($message),
-                          "$config{srcdir}") != 0) {
-                       my $conflict=readfile("$config{srcdir}/$file");
-                       if (system("svn", "revert", "--quiet", "$config{srcdir}/$file") != 0) {
-                               warn("svn revert failed\n");
-                       }
-                       return $conflict;
-               }
-       }
-       return undef # success
-} #}}}
-
-sub rcs_add ($) { #{{{
-       # filename is relative to the root of the srcdir
-       my $file=shift;
-
-       if (-d "$config{srcdir}/.svn") {
-               my $parent=dirname($file);
-               while (! -d "$config{srcdir}/$parent/.svn") {
-                       $file=$parent;
-                       $parent=dirname($file);
-               }
-               
-               if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
-                       warn("svn add failed\n");
-               }
-       }
-} #}}}
-
-sub svn_info ($$) { #{{{
-       my $field=shift;
-       my $file=shift;
-
-       my $info=`LANG=C svn info $file`;
-       my ($ret)=$info=~/^$field: (.*)$/m;
-       return $ret;
-} #}}}
-
-sub rcs_recentchanges ($) { #{{{
-       my $num=shift;
-       my @ret;
-       
-       eval q{use CGI 'escapeHTML'};
-       eval q{use Date::Parse};
-       eval q{use Time::Duration};
-       
-       if (-d "$config{srcdir}/.svn") {
-               my $svn_url=svn_info("URL", $config{srcdir});
-
-               # FIXME: currently assumes that the wiki is somewhere
-               # under trunk in svn, doesn't support other layouts.
-               my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
-               
-               my $div=qr/^--------------------+$/;
-               my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
-               my $state='start';
-               my ($rev, $user, $when, @pages, @message);
-               foreach (`LANG=C svn log --limit $num -v '$svn_url'`) {
-                       chomp;
-                       if ($state eq 'start' && /$div/) {
-                               $state='header';
-                       }
-                       elsif ($state eq 'header' && /$infoline/) {
-                               $rev=$1;
-                               $user=$2;
-                               $when=concise(ago(time - str2time($3)));
-                       }
-                       elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/([^ ]+)(?:$|\s)/) {
-                               my $file=$1;
-                               my $diffurl=$config{diffurl};
-                               $diffurl=~s/\[\[file\]\]/$file/g;
-                               $diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
-                               $diffurl=~s/\[\[r2\]\]/$rev/g;
-                               push @pages, {
-                                       link => htmllink("", pagename($file), 1),
-                                       diffurl => $diffurl,
-                               } if length $file;
-                       }
-                       elsif ($state eq 'header' && /^$/) {
-                               $state='body';
-                       }
-                       elsif ($state eq 'body' && /$div/) {
-                               my $committype="web";
-                               if (defined $message[0] &&
-                                   $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
-                                       $user="$1";
-                                       $message[0]->{line}=$2;
-                               }
-                               else {
-                                       $committype="svn";
-                               }
-                               
-                               push @ret, { rev => $rev,
-                                       user => htmllink("", $user, 1),
-                                       committype => $committype,
-                                       when => $when, message => [@message],
-                                       pages => [@pages],
-                               } if @pages;
-                               return @ret if @ret >= $num;
-                               
-                               $state='header';
-                               $rev=$user=$when=undef;
-                               @pages=@message=();
-                       }
-                       elsif ($state eq 'body') {
-                               push @message, {line => escapeHTML($_)},
-                       }
-               }
-       }
-
-       return @ret;
-} #}}}
-
-sub prune ($) { #{{{
-       my $file=shift;
-
-       unlink($file);
-       my $dir=dirname($file);
-       while (rmdir($dir)) {
-               $dir=dirname($dir);
-       }
-} #}}}
-
-sub refresh () { #{{{
-       # find existing pages
-       my %exists;
-       my @files;
-       eval q{use File::Find};
-       find({
-               no_chdir => 1,
-               wanted => sub {
-                       if (/$config{wiki_file_prune_regexp}/) {
-                               no warnings 'once';
-                               $File::Find::prune=1;
-                               use warnings "all";
-                       }
-                       elsif (! -d $_ && ! -l $_) {
-                               my ($f)=/$config{wiki_file_regexp}/; # untaint
-                               if (! defined $f) {
-                                       warn("skipping bad filename $_\n");
-                               }
-                               else {
-                                       $f=~s/^\Q$config{srcdir}\E\/?//;
-                                       push @files, $f;
-                                       $exists{pagename($f)}=1;
-                               }
-                       }
-               },
-       }, $config{srcdir});
-
-       my %rendered;
-
-       # check for added or removed pages
-       my @add;
-       foreach my $file (@files) {
-               my $page=pagename($file);
-               if (! $oldpagemtime{$page}) {
-                       debug("new page $page");
-                       push @add, $file;
-                       $links{$page}=[];
-                       $pagesources{$page}=$file;
-               }
-       }
-       my @del;
-       foreach my $page (keys %oldpagemtime) {
-               if (! $exists{$page}) {
-                       debug("removing old page $page");
-                       push @del, $pagesources{$page};
-                       prune($config{destdir}."/".$renderedfiles{$page});
-                       delete $renderedfiles{$page};
-                       $oldpagemtime{$page}=0;
-                       delete $pagesources{$page};
-               }
-       }
-       
-       # render any updated files
-       foreach my $file (@files) {
-               my $page=pagename($file);
-               
-               if (! exists $oldpagemtime{$page} ||
-                   mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
-                       debug("rendering changed file $file");
-                       render($file);
-                       $rendered{$file}=1;
-               }
-       }
-       
-       # if any files were added or removed, check to see if each page
-       # needs an update due to linking to them
-       # TODO: inefficient; pages may get rendered above and again here;
-       # problem is the bestlink may have changed and we won't know until
-       # now
-       if (@add || @del) {
-FILE:          foreach my $file (@files) {
-                       my $page=pagename($file);
-                       foreach my $f (@add, @del) {
-                               my $p=pagename($f);
-                               foreach my $link (@{$links{$page}}) {
-                                       if (bestlink($page, $link) eq $p) {
-                                               debug("rendering $file, which links to $p");
-                                               render($file);
-                                               $rendered{$file}=1;
-                                               next FILE;
-                                       }
-                               }
-                       }
-               }
-       }
-
-       # handle backlinks; if a page has added/removed links, update the
-       # pages it links to
-       # TODO: inefficient; pages may get rendered above and again here;
-       # problem is the backlinks could be wrong in the first pass render
-       # above
-       if (%rendered) {
-               my %linkchanged;
-               foreach my $file (keys %rendered, @del) {
-                       my $page=pagename($file);
-                       if (exists $links{$page}) {
-                               foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
-                                       if (length $link &&
-                                           ! exists $oldlinks{$page} ||
-                                           ! grep { $_ eq $link } @{$oldlinks{$page}}) {
-                                               $linkchanged{$link}=1;
-                                       }
-                               }
-                       }
-                       if (exists $oldlinks{$page}) {
-                               foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
-                                       if (length $link &&
-                                           ! exists $links{$page} ||
-                                           ! grep { $_ eq $link } @{$links{$page}}) {
-                                               $linkchanged{$link}=1;
-                                       }
-                               }
-                       }
-               }
-               foreach my $link (keys %linkchanged) {
-                       my $linkfile=$pagesources{$link};
-                       if (defined $linkfile) {
-                               debug("rendering $linkfile, to update its backlinks");
-                               render($linkfile);
-                       }
-               }
-       }
-} #}}}
-
-sub gen_wrapper () { #{{{
-       eval q{use Cwd 'abs_path'};
-       $config{srcdir}=abs_path($config{srcdir});
-       $config{destdir}=abs_path($config{destdir});
-       my $this=abs_path($0);
-       if (! -x $this) {
-               error("$this doesn't seem to be executable");
-       }
-
-       if ($config{setup}) {
-               error("cannot create a wrapper that uses a setup file");
-       }
-       
-       my @params=($config{srcdir}, $config{destdir},
-               "--wikiname=$config{wikiname}",
-               "--templatedir=$config{templatedir}");
-       push @params, "--verbose" if $config{verbose};
-       push @params, "--rebuild" if $config{rebuild};
-       push @params, "--nosvn" if !$config{svn};
-       push @params, "--cgi" if $config{cgi};
-       push @params, "--url=$config{url}" if length $config{url};
-       push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
-       push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
-       push @params, "--diffurl=$config{diffurl}" if length $config{diffurl};
-       push @params, "--anonok" if $config{anonok};
-       push @params, "--adminuser=$_" foreach @{$config{adminuser}};
-       my $params=join(" ", @params);
-       my $call='';
-       foreach my $p ($this, $this, @params) {
-               $call.=qq{"$p", };
-       }
-       $call.="NULL";
-       
-       my @envsave;
-       push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
-                      CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
-                      HTTP_COOKIE} if $config{cgi};
-       my $envsave="";
-       foreach my $var (@envsave) {
-               $envsave.=<<"EOF"
-       if ((s=getenv("$var")))
-               asprintf(&newenviron[i++], "%s=%s", "$var", s);
-EOF
-       }
-       
-       open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
-       print OUT <<"EOF";
-/* A wrapper for ikiwiki, can be safely made suid. */
-#define _GNU_SOURCE
-#include <stdio.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-
-extern char **environ;
-
-int main (int argc, char **argv) {
-       /* Sanitize environment. */
-       char *s;
-       char *newenviron[$#envsave+3];
-       int i=0;
-$envsave
-       newenviron[i++]="HOME=$ENV{HOME}";
-       newenviron[i]=NULL;
-       environ=newenviron;
-
-       if (argc == 2 && strcmp(argv[1], "--params") == 0) {
-               printf("$params\\n");
-               exit(0);
-       }
-       
-       execl($call);
-       perror("failed to run $this");
-       exit(1);
-}
-EOF
-       close OUT;
-       if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
-               error("failed to compile ikiwiki-wrap.c");
-       }
-       unlink("ikiwiki-wrap.c");
-       if (defined $config{wrappermode} &&
-           ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
-               error("chmod $config{wrapper}: $!");
-       }
-       print "successfully generated $config{wrapper}\n";
-} #}}}
-               
 sub misctemplate ($$) { #{{{
        my $title=shift;
        my $pagebody=shift;
 sub misctemplate ($$) { #{{{
        my $title=shift;
        my $pagebody=shift;
@@ -876,21 +332,6 @@ sub misctemplate ($$) { #{{{
        return $template->output;
 }#}}}
 
        return $template->output;
 }#}}}
 
-sub cgi_recentchanges ($) { #{{{
-       my $q=shift;
-       
-       my $template=HTML::Template->new(
-               filename => "$config{templatedir}/recentchanges.tmpl"
-       );
-       $template->param(
-               title => "RecentChanges",
-               indexlink => indexlink(),
-               wikiname => $config{wikiname},
-               changelog => [rcs_recentchanges(100)],
-       );
-       print $q->header, $template->output;
-} #}}}
-
 sub userinfo_get ($$) { #{{{
        my $user=shift;
        my $field=shift;
 sub userinfo_get ($$) { #{{{
        my $user=shift;
        my $field=shift;
@@ -940,166 +381,6 @@ sub userinfo_setall ($$) { #{{{
        return $ret;
 } #}}}
 
        return $ret;
 } #}}}
 
-sub cgi_signin ($$) { #{{{
-       my $q=shift;
-       my $session=shift;
-
-       eval q{use CGI::FormBuilder};
-       my $form = CGI::FormBuilder->new(
-               title => "signin",
-               fields => [qw(do page from name password confirm_password email)],
-               header => 1,
-               method => 'POST',
-               validate => {
-                       confirm_password => {
-                               perl => q{eq $form->field("password")},
-                       },
-                       email => 'EMAIL',
-               },
-               required => 'NONE',
-               javascript => 0,
-               params => $q,
-               action => $q->request_uri,
-               header => 0,
-               template => (-e "$config{templatedir}/signin.tmpl" ?
-                             "$config{templatedir}/signin.tmpl" : "")
-       );
-       
-       $form->field(name => "name", required => 0);
-       $form->field(name => "do", type => "hidden");
-       $form->field(name => "page", type => "hidden");
-       $form->field(name => "from", type => "hidden");
-       $form->field(name => "password", type => "password", required => 0);
-       $form->field(name => "confirm_password", type => "password", required => 0);
-       $form->field(name => "email", required => 0);
-       if ($q->param("do") ne "signin") {
-               $form->text("You need to log in first.");
-       }
-       
-       if ($form->submitted) {
-               # Set required fields based on how form was submitted.
-               my %required=(
-                       "Login" => [qw(name password)],
-                       "Register" => [qw(name password confirm_password email)],
-                       "Mail Password" => [qw(name)],
-               );
-               foreach my $opt (@{$required{$form->submitted}}) {
-                       $form->field(name => $opt, required => 1);
-               }
-       
-               # Validate password differently depending on how
-               # form was submitted.
-               if ($form->submitted eq 'Login') {
-                       $form->field(
-                               name => "password",
-                               validate => sub {
-                                       length $form->field("name") &&
-                                       shift eq userinfo_get($form->field("name"), 'password');
-                               },
-                       );
-                       $form->field(name => "name", validate => '/^\w+$/');
-               }
-               else {
-                       $form->field(name => "password", validate => 'VALUE');
-               }
-               # And make sure the entered name exists when logging
-               # in or sending email, and does not when registering.
-               if ($form->submitted eq 'Register') {
-                       $form->field(
-                               name => "name",
-                               validate => sub {
-                                       my $name=shift;
-                                       length $name &&
-                                       ! userinfo_get($name, "regdate");
-                               },
-                       );
-               }
-               else {
-                       $form->field(
-                               name => "name",
-                               validate => sub {
-                                       my $name=shift;
-                                       length $name &&
-                                       userinfo_get($name, "regdate");
-                               },
-                       );
-               }
-       }
-       else {
-               # First time settings.
-               $form->field(name => "name", comment => "use FirstnameLastName");
-               $form->field(name => "confirm_password", comment => "(only needed");
-               $form->field(name => "email",            comment => "for registration)");
-               if ($session->param("name")) {
-                       $form->field(name => "name", value => $session->param("name"));
-               }
-       }
-
-       if ($form->submitted && $form->validate) {
-               if ($form->submitted eq 'Login') {
-                       $session->param("name", $form->field("name"));
-                       if (defined $form->field("do") && 
-                           $form->field("do") ne 'signin') {
-                               print $q->redirect(
-                                       "$config{cgiurl}?do=".$form->field("do").
-                                       "&page=".$form->field("page").
-                                       "&from=".$form->field("from"));;
-                       }
-                       else {
-                               print $q->redirect($config{url});
-                       }
-               }
-               elsif ($form->submitted eq 'Register') {
-                       my $user_name=$form->field('name');
-                       if (userinfo_setall($user_name, {
-                                          'email' => $form->field('email'),
-                                          'password' => $form->field('password'),
-                                          'regdate' => time
-                                        })) {
-                               $form->field(name => "confirm_password", type => "hidden");
-                               $form->field(name => "email", type => "hidden");
-                               $form->text("Registration successful. Now you can Login.");
-                               print $session->header();
-                               print misctemplate($form->title, $form->render(submit => ["Login"]));
-                       }
-                       else {
-                               error("Error saving registration.");
-                       }
-               }
-               elsif ($form->submitted eq 'Mail Password') {
-                       my $user_name=$form->field("name");
-                       my $template=HTML::Template->new(
-                               filename => "$config{templatedir}/passwordmail.tmpl"
-                       );
-                       $template->param(
-                               user_name => $user_name,
-                               user_password => userinfo_get($user_name, "password"),
-                               wikiurl => $config{url},
-                               wikiname => $config{wikiname},
-                               REMOTE_ADDR => $ENV{REMOTE_ADDR},
-                       );
-                       
-                       eval q{use Mail::Sendmail};
-                       my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
-                       sendmail(
-                               To => userinfo_get($user_name, "email"),
-                               From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
-                               Subject => "$config{wikiname} information",
-                               Message => $template->output,
-                       ) or error("Failed to send mail");
-                       
-                       $form->text("Your password has been emailed to you.");
-                       $form->field(name => "name", required => 0);
-                       print $session->header();
-                       print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
-               }
-       }
-       else {
-               print $session->header();
-               print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
-       }
-} #}}}
-
 sub is_admin ($) { #{{{
        my $user_name=shift;
 
 sub is_admin ($) { #{{{
        my $user_name=shift;
 
@@ -1135,359 +416,27 @@ sub globlist_match ($$) { #{{{
        return 0;
 } #}}}
 
        return 0;
 } #}}}
 
-sub page_locked ($$;$) { #{{{
-       my $page=shift;
-       my $session=shift;
-       my $nonfatal=shift;
-       
-       my $user=$session->param("name");
-       return if length $user && is_admin($user);
-
-       foreach my $admin (@{$config{adminuser}}) {
-               my $locked_pages=userinfo_get($admin, "locked_pages");
-               if (globlist_match($page, userinfo_get($admin, "locked_pages"))) {
-                       return 1 if $nonfatal;
-                       error(htmllink("", $page, 1)." is locked by ".
-                             htmllink("", $admin, 1)." and cannot be edited.");
-               }
-       }
-
-       return 0;
-} #}}}
-
-sub cgi_prefs ($$) { #{{{
-       my $q=shift;
-       my $session=shift;
-
-       eval q{use CGI::FormBuilder};
-       my $form = CGI::FormBuilder->new(
-               title => "preferences",
-               fields => [qw(do name password confirm_password email locked_pages)],
-               header => 0,
-               method => 'POST',
-               validate => {
-                       confirm_password => {
-                               perl => q{eq $form->field("password")},
-                       },
-                       email => 'EMAIL',
-               },
-               required => 'NONE',
-               javascript => 0,
-               params => $q,
-               action => $q->request_uri,
-               template => (-e "$config{templatedir}/prefs.tmpl" ?
-                             "$config{templatedir}/prefs.tmpl" : "")
-       );
-       my @buttons=("Save Preferences", "Logout", "Cancel");
-       
-       my $user_name=$session->param("name");
-       $form->field(name => "do", type => "hidden");
-       $form->field(name => "name", disabled => 1,
-               value => $user_name, force => 1);
-       $form->field(name => "password", type => "password");
-       $form->field(name => "confirm_password", type => "password");
-       $form->field(name => "locked_pages", size => 50,
-               comment => "(".htmllink("", "GlobList", 1).")");
-       
-       if (! is_admin($user_name)) {
-               $form->field(name => "locked_pages", type => "hidden");
-       }
-       
-       if (! $form->submitted) {
-               $form->field(name => "email", force => 1,
-                       value => userinfo_get($user_name, "email"));
-               $form->field(name => "locked_pages", force => 1,
-                       value => userinfo_get($user_name, "locked_pages"));
-       }
-       
-       if ($form->submitted eq 'Logout') {
-               $session->delete();
-               print $q->redirect($config{url});
-               return;
-       }
-       elsif ($form->submitted eq 'Cancel') {
-               print $q->redirect($config{url});
-               return;
-       }
-       elsif ($form->submitted eq "Save Preferences" && $form->validate) {
-               foreach my $field (qw(password email locked_pages)) {
-                       if (length $form->field($field)) {
-                               userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
-                       }
-               }
-               $form->text("Preferences saved.");
-       }
-       
-       print $session->header();
-       print misctemplate($form->title, $form->render(submit => \@buttons));
-} #}}}
-
-sub cgi_editpage ($$) { #{{{
-       my $q=shift;
-       my $session=shift;
-
-       eval q{use CGI::FormBuilder};
-       my $form = CGI::FormBuilder->new(
-               fields => [qw(do rcsinfo from page content comments)],
-               header => 1,
-               method => 'POST',
-               validate => {
-                       content => '/.+/',
-               },
-               required => [qw{content}],
-               javascript => 0,
-               params => $q,
-               action => $q->request_uri,
-               table => 0,
-               template => "$config{templatedir}/editpage.tmpl"
-       );
-       my @buttons=("Save Page", "Preview", "Cancel");
-       
-       my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
-       if (! defined $page || ! length $page || $page ne $q->param('page') ||
-           $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
-               error("bad page name");
-       }
-       $page=lc($page);
-       
-       my $file=$page.$config{default_pageext};
-       my $newfile=1;
-       if (exists $pagesources{lc($page)}) {
-               $file=$pagesources{lc($page)};
-               $newfile=0;
-       }
-
-       $form->field(name => "do", type => 'hidden');
-       $form->field(name => "from", type => 'hidden');
-       $form->field(name => "rcsinfo", type => 'hidden');
-       $form->field(name => "page", value => "$page", force => 1);
-       $form->field(name => "comments", type => "text", size => 80);
-       $form->field(name => "content", type => "textarea", rows => 20,
-               cols => 80);
-       $form->tmpl_param("can_commit", $config{svn});
-       $form->tmpl_param("indexlink", indexlink());
-       $form->tmpl_param("helponformattinglink",
-               htmllink("", "HelpOnFormatting", 1));
-       if (! $form->submitted) {
-               $form->field(name => "rcsinfo", value => rcs_prepedit($file),
-                       force => 1);
-       }
-       
-       if ($form->submitted eq "Cancel") {
-               print $q->redirect("$config{url}/".htmlpage($page));
-               return;
-       }
-       elsif ($form->submitted eq "Preview") {
-               $form->tmpl_param("page_preview",
-                       htmlize($config{default_pageext},
-                               linkify($form->field('content'), $page)));
-       }
-       else {
-               $form->tmpl_param("page_preview", "");
-       }
-       $form->tmpl_param("page_conflict", "");
-       
-       if (! $form->submitted || $form->submitted eq "Preview" || 
-           ! $form->validate) {
-               if ($form->field("do") eq "create") {
-                       if (exists $pagesources{lc($page)}) {
-                               # hmm, someone else made the page in the
-                               # meantime?
-                               print $q->redirect("$config{url}/".htmlpage($page));
-                               return;
-                       }
-                       
-                       my @page_locs;
-                       my $best_loc;
-                       my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
-                       if (! defined $from || ! length $from ||
-                           $from ne $form->param('from') ||
-                           $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
-                               @page_locs=$best_loc=$page;
-                       }
-                       else {
-                               my $dir=$from."/";
-                               $dir=~s![^/]+/$!!;
-                               
-                               if ($page eq 'discussion') {
-                                       $best_loc="$from/$page";
-                               }
-                               else {
-                                       $best_loc=$dir.$page;
-                               }
-                               
-                               push @page_locs, $dir.$page;
-                               push @page_locs, "$from/$page";
-                               while (length $dir) {
-                                       $dir=~s![^/]+/$!!;
-                                       push @page_locs, $dir.$page;
-                               }
-
-                               @page_locs = grep {
-                                       ! exists $pagesources{lc($_)} &&
-                                       ! page_locked($_, $session, 1)
-                               } @page_locs;
-                       }
-
-                       $form->tmpl_param("page_select", 1);
-                       $form->field(name => "page", type => 'select',
-                               options => \@page_locs, value => $best_loc);
-                       $form->title("creating $page");
-               }
-               elsif ($form->field("do") eq "edit") {
-                       page_locked($page, $session);
-                       if (! defined $form->field('content') || 
-                           ! length $form->field('content')) {
-                               my $content="";
-                               if (exists $pagesources{lc($page)}) {
-                                       $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
-                                       $content=~s/\n/\r\n/g;
-                               }
-                               $form->field(name => "content", value => $content,
-                                       force => 1);
-                       }
-                       $form->tmpl_param("page_select", 0);
-                       $form->field(name => "page", type => 'hidden');
-                       $form->title("editing $page");
-               }
-               
-               print $form->render(submit => \@buttons);
-       }
-       else {
-               # save page
-               page_locked($page, $session);
-               
-               my $content=$form->field('content');
-               $content=~s/\r\n/\n/g;
-               $content=~s/\r/\n/g;
-               writefile("$config{srcdir}/$file", $content);
-               
-               my $message="web commit ";
-               if (length $session->param("name")) {
-                       $message.="by ".$session->param("name");
-               }
-               else {
-                       $message.="from $ENV{REMOTE_ADDR}";
-               }
-               if (defined $form->field('comments') &&
-                   length $form->field('comments')) {
-                       $message.=": ".$form->field('comments');
-               }
-               
-               if ($config{svn}) {
-                       if ($newfile) {
-                               rcs_add($file);
-                       }
-                       # prevent deadlock with post-commit hook
-                       unlockwiki();
-                       # presumably the commit will trigger an update
-                       # of the wiki
-                       my $conflict=rcs_commit($file, $message,
-                               $form->field("rcsinfo"));
-               
-                       if (defined $conflict) {
-                               $form->field(name => "rcsinfo", value => rcs_prepedit($file),
-                                       force => 1);
-                               $form->tmpl_param("page_conflict", 1);
-                               $form->field("content", value => $conflict, force => 1);
-                               $form->field("do", "edit)");
-                               $form->tmpl_param("page_select", 0);
-                               $form->field(name => "page", type => 'hidden');
-                               $form->title("editing $page");
-                               print $form->render(submit => \@buttons);
-                               return;
-                       }
-               }
-               else {
-                       loadindex();
-                       refresh();
-                       saveindex();
-               }
-               
-               # The trailing question mark tries to avoid broken
-               # caches and get the most recent version of the page.
-               print $q->redirect("$config{url}/".htmlpage($page)."?updated");
-       }
-} #}}}
-
-sub cgi () { #{{{
-       eval q{use CGI};
-       eval q{use CGI::Session};
-       
-       my $q=CGI->new;
-       
-       my $do=$q->param('do');
-       if (! defined $do || ! length $do) {
-               error("\"do\" parameter missing");
-       }
-       
-       # This does not need a session.
-       if ($do eq 'recentchanges') {
-               cgi_recentchanges($q);
-               return;
-       }
-       
-       CGI::Session->name("ikiwiki_session");
-
-       my $oldmask=umask(077);
-       my $session = CGI::Session->new("driver:db_file", $q,
-               { FileName => "$config{wikistatedir}/sessions.db" });
-       umask($oldmask);
-       
-       # Everything below this point needs the user to be signed in.
-       if ((! $config{anonok} && ! defined $session->param("name") ||
-            ! defined $session->param("name") ||
-            ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
-               cgi_signin($q, $session);
-       
-               # Force session flush with safe umask.
-               my $oldmask=umask(077);
-               $session->flush;
-               umask($oldmask);
-               
-               return;
-       }
-       
-       if ($do eq 'create' || $do eq 'edit') {
-               cgi_editpage($q, $session);
-       }
-       elsif ($do eq 'prefs') {
-               cgi_prefs($q, $session);
-       }
-       else {
-               error("unknown do parameter");
-       }
-} #}}}
-
-sub setup () { # {{{
-       my $setup=possibly_foolish_untaint($config{setup});
-       delete $config{setup};
-       open (IN, $setup) || error("read $setup: $!\n");
-       local $/=undef;
-       my $code=<IN>;
-       ($code)=$code=~/(.*)/s;
-       close IN;
-
-       eval $code;
-       error($@) if $@;
-       exit;
-} #}}}
-
 # main {{{
 # main {{{
-setup() if $config{setup};
+memoize('pagename');
+memoize('bestlink');
+if ($config{setup}) {
+       require IkiWiki::Setup;
+       setup();
+}
 lockwiki();
 if ($config{wrapper}) {
 lockwiki();
 if ($config{wrapper}) {
+       require IkiWiki::Wrapper;
        gen_wrapper();
        exit;
 }
        gen_wrapper();
        exit;
 }
-memoize('pagename');
-memoize('bestlink');
 loadindex() unless $config{rebuild};
 if ($config{cgi}) {
 loadindex() unless $config{rebuild};
 if ($config{cgi}) {
+       require IkiWiki::CGI;
        cgi();
 }
 else {
        cgi();
 }
 else {
-       rcs_update() if $config{svn};
+       require IkiWiki::Render;
+       rcs_update();
        refresh();
        saveindex();
 }
        refresh();
        saveindex();
 }