ikiwiki/IkiWiki/Render.pm

820 lines
19 KiB
Perl

#!/usr/bin/perl
package IkiWiki;
use warnings;
use strict;
use IkiWiki;
use Encode;
my (%backlinks, %rendered);
our %brokenlinks;
my $links_calculated=0;
sub calculate_links () {
return if $links_calculated;
%backlinks=%brokenlinks=();
foreach my $page (keys %links) {
foreach my $link (@{$links{$page}}) {
my $bestlink=bestlink($page, $link);
if (length $bestlink) {
$backlinks{$bestlink}{$page}=1
if $bestlink ne $page;
}
else {
push @{$brokenlinks{$link}}, $page;
}
}
}
$links_calculated=1;
}
sub backlink_pages ($) {
my $page=shift;
calculate_links();
return keys %{$backlinks{$page}};
}
sub backlinks ($) {
my $page=shift;
my @links;
foreach my $p (backlink_pages($page)) {
my $href=urlto($p, $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 => $href, page => pagetitle($p_trimmed) };
}
return @links;
}
sub genpage ($$) {
my $page=shift;
my $content=shift;
run_hooks(postscan => sub {
shift->(page => $page, content => $content);
});
my $templatefile;
run_hooks(templatefile => sub {
return if defined $templatefile;
my $file=shift->(page => $page);
if (defined $file && defined template_file($file)) {
$templatefile=$file;
}
});
my $template=template(defined $templatefile ? $templatefile : 'page.tmpl', blind_cache => 1);
my $actions=0;
if (length $config{cgiurl}) {
if (IkiWiki->can("cgi_editpage")) {
$template->param(editurl => cgiurl(do => "edit", page => $page));
$actions++;
}
if (exists $hooks{auth}) {
$template->param(prefsurl => cgiurl(do => "prefs"));
$actions++;
}
}
if (defined $config{historyurl} && length $config{historyurl}) {
my $u=$config{historyurl};
$u=~s/\[\[file\]\]/$pagesources{$page}/g;
$template->param(historyurl => $u);
$actions++;
}
if ($config{discussion}) {
if ($page !~ /.*\/\Q$config{discussionpage}\E$/i &&
(length $config{cgiurl} ||
exists $links{$page."/".$config{discussionpage}})) {
$template->param(discussionlink => htmllink($page, $page, $config{discussionpage}, noimageinline => 1, forcesubpage => 1));
$actions++;
}
}
if ($actions) {
$template->param(have_actions => 1);
}
my @backlinks=sort { $a->{page} cmp $b->{page} } backlinks($page);
my ($backlinks, $more_backlinks);
if (@backlinks <= $config{numbacklinks} || ! $config{numbacklinks}) {
$backlinks=\@backlinks;
$more_backlinks=[];
}
else {
$backlinks=[@backlinks[0..$config{numbacklinks}-1]];
$more_backlinks=[@backlinks[$config{numbacklinks}..$#backlinks]];
}
$template->param(
title => $page eq 'index'
? $config{wikiname}
: pagetitle(basename($page)),
wikiname => $config{wikiname},
content => $content,
backlinks => $backlinks,
more_backlinks => $more_backlinks,
mtime => displaytime($pagemtime{$page}),
ctime => displaytime($pagectime{$page}),
baseurl => baseurl($page),
);
run_hooks(pagetemplate => sub {
shift->(page => $page, destpage => $page, template => $template);
});
$content=$template->output;
run_hooks(format => sub {
$content=shift->(
page => $page,
content => $content,
);
});
return $content;
}
sub scan ($) {
my $file=shift;
debug(sprintf(gettext("scanning %s"), $file));
my $type=pagetype($file);
if (defined $type) {
my $srcfile=srcfile($file);
my $content=readfile($srcfile);
my $page=pagename($file);
will_render($page, htmlpage($page), 1);
if ($config{discussion}) {
# Discussion links are a special case since they're
# not in the text of the page, but on its template.
$links{$page}=[ $page."/".lc($config{discussionpage}) ];
}
else {
$links{$page}=[];
}
delete $typedlinks{$page};
run_hooks(scan => sub {
shift->(
page => $page,
content => $content,
);
});
# Preprocess in scan-only mode.
preprocess($page, $page, $content, 1);
}
else {
will_render($file, $file, 1);
}
}
sub fast_file_copy (@) {
my $srcfile=shift;
my $destfile=shift;
my $srcfd=shift;
my $destfd=shift;
my $cleanup=shift;
my $blksize = 16384;
my ($len, $buf, $written);
while ($len = sysread $srcfd, $buf, $blksize) {
if (! defined $len) {
next if $! =~ /^Interrupted/;
error("failed to read $srcfile: $!", $cleanup);
}
my $offset = 0;
while ($len) {
defined($written = syswrite $destfd, $buf, $len, $offset)
or error("failed to write $destfile: $!", $cleanup);
$len -= $written;
$offset += $written;
}
}
}
sub render ($$) {
my $file=shift;
return if $rendered{$file};
debug(shift);
$rendered{$file}=1;
my $type=pagetype($file);
my $srcfile=srcfile($file);
if (defined $type) {
my $page=pagename($file);
delete $depends{$page};
delete $depends_simple{$page};
will_render($page, htmlpage($page), 1);
return if $type=~/^_/;
my $content=htmlize($page, $page, $type,
linkify($page, $page,
preprocess($page, $page,
filter($page, $page,
readfile($srcfile)))));
my $output=htmlpage($page);
writefile($output, $config{destdir}, genpage($page, $content));
}
else {
delete $depends{$file};
delete $depends_simple{$file};
will_render($file, $file, 1);
if ($config{hardlink}) {
# only hardlink if owned by same user
my @stat=stat($srcfile);
if ($stat[4] == $>) {
prep_writefile($file, $config{destdir});
unlink($config{destdir}."/".$file);
if (link($srcfile, $config{destdir}."/".$file)) {
return;
}
}
# if hardlink fails, fall back to copying
}
my $srcfd=readfile($srcfile, 1, 1);
writefile($file, $config{destdir}, undef, 1, sub {
fast_file_copy($srcfile, $file, $srcfd, @_);
});
}
}
sub prune ($) {
my $file=shift;
unlink($file);
my $dir=dirname($file);
while (rmdir($dir)) {
$dir=dirname($dir);
}
}
sub srcdir_check () {
# security check, avoid following symlinks in the srcdir path by default
my $test=$config{srcdir};
while (length $test) {
if (-l $test && ! $config{allow_symlinks_before_srcdir}) {
error(sprintf(gettext("symlink found in srcdir path (%s) -- set allow_symlinks_before_srcdir to allow this"), $test));
}
unless ($test=~s/\/+$//) {
$test=dirname($test);
}
}
}
sub find_src_files () {
my @files;
my %pages;
eval q{use File::Find};
error($@) if $@;
my ($page, $dir, $underlay);
my $helper=sub {
my $file=decode_utf8($_);
return if -l $file || -d _;
$file=~s/^\Q$dir\E\/?//;
return if ! length $file;
$page = pagename($file);
if (! exists $pagesources{$page} &&
file_pruned($file)) {
$File::Find::prune=1;
return;
}
my ($f) = $file =~ /$config{wiki_file_regexp}/; # untaint
if (! defined $f) {
warn(sprintf(gettext("skipping bad filename %s"), $file)."\n");
}
if ($underlay) {
# avoid underlaydir override attacks; see security.mdwn
if (! -l "$config{srcdir}/$f" && ! -e _) {
if (! $pages{$page}) {
push @files, $f;
$pages{$page}=1;
}
}
}
else {
push @files, $f;
if ($pages{$page}) {
debug(sprintf(gettext("%s has multiple possible source pages"), $page));
}
$pages{$page}=1;
}
};
find({
no_chdir => 1,
wanted => $helper,
}, $dir=$config{srcdir});
$underlay=1;
foreach (@{$config{underlaydirs}}, $config{underlaydir}) {
find({
no_chdir => 1,
wanted => $helper,
}, $dir=$_);
};
return \@files, \%pages;
}
sub find_new_files ($) {
my $files=shift;
my @new;
my @internal_new;
my $times_noted;
foreach my $file (@$files) {
my $page=pagename($file);
if (exists $pagesources{$page} && $pagesources{$page} ne $file) {
# the page has changed its type
$forcerebuild{$page}=1;
}
$pagesources{$page}=$file;
if (! $pagemtime{$page}) {
if (isinternal($page)) {
push @internal_new, $file;
}
elsif ($config{rcs}) {
push @new, $file;
if ($config{gettime} && -e "$config{srcdir}/$file") {
if (! $times_noted) {
debug(sprintf(gettext("querying %s for file creation and modification times.."), $config{rcs}));
$times_noted=1;
}
eval {
my $ctime=rcs_getctime("$config{srcdir}/$file");
if ($ctime > 0) {
$pagectime{$page}=$ctime;
}
};
if ($@) {
print STDERR $@;
}
my $mtime;
eval {
$mtime=rcs_getmtime("$config{srcdir}/$file");
};
if ($@) {
print STDERR $@;
}
elsif ($mtime > 0) {
utime($mtime, $mtime, "$config{srcdir}/$file");
}
}
}
$pagecase{lc $page}=$page;
if (! exists $pagectime{$page}) {
$pagectime{$page}=(srcfile_stat($file))[10];
}
}
}
return \@new, \@internal_new;
}
sub find_del_files ($) {
my $pages=shift;
my @del;
my @internal_del;
foreach my $page (keys %pagemtime) {
if (! $pages->{$page}) {
if (isinternal($page)) {
push @internal_del, $pagesources{$page};
}
else {
push @del, $pagesources{$page};
}
$links{$page}=[];
delete $typedlinks{$page};
$renderedfiles{$page}=[];
$pagemtime{$page}=0;
}
}
return \@del, \@internal_del;
}
sub remove_del (@) {
foreach my $file (@_) {
my $page=pagename($file);
if (! isinternal($page)) {
debug(sprintf(gettext("removing obsolete %s"), $page));
}
foreach my $old (@{$oldrenderedfiles{$page}}) {
prune($config{destdir}."/".$old);
}
foreach my $source (keys %destsources) {
if ($destsources{$source} eq $page) {
delete $destsources{$source};
}
}
delete $pagecase{lc $page};
delete $pagesources{$page};
}
}
sub find_changed ($) {
my $files=shift;
my @changed;
my @internal_changed;
foreach my $file (@$files) {
my $page=pagename($file);
my ($srcfile, @stat)=srcfile_stat($file);
if (! exists $pagemtime{$page} ||
$stat[9] > $pagemtime{$page} ||
$forcerebuild{$page}) {
$pagemtime{$page}=$stat[9];
if (isinternal($page)) {
# Preprocess internal page in scan-only mode.
preprocess($page, $page, readfile($srcfile), 1);
push @internal_changed, $file;
}
else {
push @changed, $file;
}
}
}
return \@changed, \@internal_changed;
}
sub calculate_old_links ($$) {
my ($changed, $del)=@_;
my %oldlink_targets;
foreach my $file (@$changed, @$del) {
my $page=pagename($file);
if (exists $oldlinks{$page}) {
foreach my $l (@{$oldlinks{$page}}) {
$oldlink_targets{$page}{$l}=bestlink($page, $l);
}
}
}
return \%oldlink_targets;
}
sub derender_internal ($) {
my $file=shift;
my $page=pagename($file);
delete $depends{$page};
delete $depends_simple{$page};
foreach my $old (@{$renderedfiles{$page}}) {
delete $destsources{$old};
}
$renderedfiles{$page}=[];
}
sub render_linkers ($) {
my $f=shift;
my $p=pagename($f);
foreach my $page (keys %{$backlinks{$p}}) {
my $file=$pagesources{$page};
render($file, sprintf(gettext("building %s, which links to %s"), $file, $p));
}
}
sub remove_unrendered () {
foreach my $src (keys %rendered) {
my $page=pagename($src);
foreach my $file (@{$oldrenderedfiles{$page}}) {
if (! grep { $_ eq $file } @{$renderedfiles{$page}}) {
debug(sprintf(gettext("removing %s, no longer built by %s"), $file, $page));
prune($config{destdir}."/".$file);
}
}
}
}
sub link_types_changed ($$) {
# each is of the form { type => { link => 1 } }
my $new = shift;
my $old = shift;
return 0 if !defined $new && !defined $old;
return 1 if (!defined $new && %$old) || (!defined $old && %$new);
while (my ($type, $links) = each %$new) {
foreach my $link (keys %$links) {
return 1 unless exists $old->{$type}{$link};
}
}
while (my ($type, $links) = each %$old) {
foreach my $link (keys %$links) {
return 1 unless exists $new->{$type}{$link};
}
}
return 0;
}
sub calculate_changed_links ($$$) {
my ($changed, $del, $oldlink_targets)=@_;
my (%backlinkchanged, %linkchangers);
foreach my $file (@$changed, @$del) {
my $page=pagename($file);
if (exists $links{$page}) {
foreach my $l (@{$links{$page}}) {
my $target=bestlink($page, $l);
if (! exists $oldlink_targets->{$page}{$l} ||
$target ne $oldlink_targets->{$page}{$l}) {
$backlinkchanged{$target}=1;
$linkchangers{lc($page)}=1;
}
delete $oldlink_targets->{$page}{$l};
}
}
if (exists $oldlink_targets->{$page} &&
%{$oldlink_targets->{$page}}) {
foreach my $target (values %{$oldlink_targets->{$page}}) {
$backlinkchanged{$target}=1;
}
$linkchangers{lc($page)}=1;
}
# we currently assume that changing the type of a link doesn't
# change backlinks
if (!exists $linkchangers{lc($page)}) {
if (link_types_changed($typedlinks{$page}, $oldtypedlinks{$page})) {
$linkchangers{lc($page)}=1;
}
}
}
return \%backlinkchanged, \%linkchangers;
}
sub render_dependent ($$$$$$$) {
my ($files, $new, $internal_new, $del, $internal_del,
$internal_changed, $linkchangers)=@_;
my @changed=(keys %rendered, @$del);
my @exists_changed=(@$new, @$del);
my %lc_changed = map { lc(pagename($_)) => 1 } @changed;
my %lc_exists_changed = map { lc(pagename($_)) => 1 } @exists_changed;
foreach my $f (@$files) {
next if $rendered{$f};
my $p=pagename($f);
my $reason = undef;
if (exists $depends_simple{$p}) {
foreach my $d (keys %{$depends_simple{$p}}) {
if (($depends_simple{$p}{$d} & $IkiWiki::DEPEND_CONTENT &&
$lc_changed{$d})
||
($depends_simple{$p}{$d} & $IkiWiki::DEPEND_PRESENCE &&
$lc_exists_changed{$d})
||
($depends_simple{$p}{$d} & $IkiWiki::DEPEND_LINKS &&
$linkchangers->{$d})
) {
$reason = $d;
last;
}
}
}
if (exists $depends{$p} && ! defined $reason) {
foreach my $dep (keys %{$depends{$p}}) {
my $sub=pagespec_translate($dep);
next unless defined $sub;
# only consider internal files
# if the page explicitly depends
# on such files
my $internal_dep=$dep =~ /internal\(/;
my $in=sub {
my $list=shift;
my $type=shift;
foreach my $file (@$list) {
next if $file eq $f;
my $page=pagename($file);
if ($sub->($page, location => $p)) {
if ($type == $IkiWiki::DEPEND_LINKS) {
next unless $linkchangers->{lc($page)};
}
$reason=$page;
return 1;
}
}
return undef;
};
if ($depends{$p}{$dep} & $IkiWiki::DEPEND_CONTENT) {
last if $in->(\@changed, $IkiWiki::DEPEND_CONTENT);
last if $internal_dep && (
$in->($internal_new, $IkiWiki::DEPEND_CONTENT) ||
$in->($internal_del, $IkiWiki::DEPEND_CONTENT) ||
$in->($internal_changed, $IkiWiki::DEPEND_CONTENT)
);
}
if ($depends{$p}{$dep} & $IkiWiki::DEPEND_PRESENCE) {
last if $in->(\@exists_changed, $IkiWiki::DEPEND_PRESENCE);
last if $internal_dep && (
$in->($internal_new, $IkiWiki::DEPEND_PRESENCE) ||
$in->($internal_del, $IkiWiki::DEPEND_PRESENCE)
);
}
if ($depends{$p}{$dep} & $IkiWiki::DEPEND_LINKS) {
last if $in->(\@changed, $IkiWiki::DEPEND_LINKS);
last if $internal_dep && (
$in->($internal_new, $IkiWiki::DEPEND_LINKS) ||
$in->($internal_del, $IkiWiki::DEPEND_LINKS) ||
$in->($internal_changed, $IkiWiki::DEPEND_LINKS)
);
}
}
}
if (defined $reason) {
render($f, sprintf(gettext("building %s, which depends on %s"), $f, $reason));
return 1;
}
}
return 0;
}
sub render_backlinks ($) {
my $backlinkchanged=shift;
foreach my $link (keys %$backlinkchanged) {
my $linkfile=$pagesources{$link};
if (defined $linkfile) {
render($linkfile, sprintf(gettext("building %s, to update its backlinks"), $linkfile));
}
}
}
sub gen_autofile ($$$) {
my $autofile=shift;
my $pages=shift;
my $del=shift;
if (file_pruned($autofile)) {
return;
}
my ($file)="$config{srcdir}/$autofile" =~ /$config{wiki_file_regexp}/; # untaint
if (! defined $file) {
return;
}
# Remember autofiles that were tried, and never try them again later.
if (exists $wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}) {
return;
}
$wikistate{$autofiles{$autofile}{plugin}}{autofile}{$autofile}=1;
if (srcfile($autofile, 1) || file_pruned($autofile)) {
return;
}
if (-l $file || -d _ || -e _) {
return;
}
my $page = pagename($file);
if ($pages->{$page}) {
return;
}
if (grep { $_ eq $autofile } @$del) {
return;
}
$autofiles{$autofile}{generator}->();
$pages->{$page}=1;
return 1;
}
sub refresh () {
srcdir_check();
run_hooks(refresh => sub { shift->() });
my ($files, $pages)=find_src_files();
my ($new, $internal_new)=find_new_files($files);
my ($del, $internal_del)=find_del_files($pages);
my ($changed, $internal_changed)=find_changed($files);
run_hooks(needsbuild => sub { shift->($changed) });
my $oldlink_targets=calculate_old_links($changed, $del);
foreach my $file (@$changed) {
scan($file);
}
foreach my $autofile (keys %autofiles) {
if (gen_autofile($autofile, $pages, $del)) {
push @{$files}, $autofile;
push @{$new}, $autofile if find_new_files([$autofile]);
push @{$changed}, $autofile if find_changed([$autofile]);
scan($autofile);
}
}
calculate_links();
remove_del(@$del, @$internal_del);
foreach my $file (@$changed) {
render($file, sprintf(gettext("building %s"), $file));
}
foreach my $file (@$internal_new, @$internal_del, @$internal_changed) {
derender_internal($file);
}
my ($backlinkchanged, $linkchangers)=calculate_changed_links($changed,
$del, $oldlink_targets);
foreach my $file (@$new, @$del) {
render_linkers($file);
}
if (@$changed || @$internal_changed ||
@$del || @$internal_del || @$internal_new) {
1 while render_dependent($files, $new, $internal_new,
$del, $internal_del, $internal_changed,
$linkchangers);
}
render_backlinks($backlinkchanged);
remove_unrendered();
if (@$del) {
run_hooks(delete => sub { shift->(@$del) });
}
if (%rendered) {
run_hooks(change => sub { shift->(keys %rendered) });
}
}
sub clean_rendered {
lockwiki();
loadindex();
remove_unrendered();
foreach my $page (keys %oldrenderedfiles) {
foreach my $file (@{$oldrenderedfiles{$page}}) {
prune($config{destdir}."/".$file);
}
}
}
sub commandline_render () {
lockwiki();
loadindex();
unlockwiki();
my $srcfile=possibly_foolish_untaint($config{render});
my $file=$srcfile;
$file=~s/\Q$config{srcdir}\E\/?//;
my $type=pagetype($file);
die sprintf(gettext("ikiwiki: cannot build %s"), $srcfile)."\n" unless defined $type;
my $content=readfile($srcfile);
my $page=pagename($file);
$pagesources{$page}=$file;
$content=filter($page, $page, $content);
$content=preprocess($page, $page, $content);
$content=linkify($page, $page, $content);
$content=htmlize($page, $page, $type, $content);
$pagemtime{$page}=(stat($srcfile))[9];
$pagectime{$page}=$pagemtime{$page} if ! exists $pagectime{$page};
print genpage($page, $content);
exit 0;
}
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