+
+ # handle linkbacks; 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 linkbacks 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 $link (@{$links{$page}}) {
+ $link=bestlink($page, $link);
+ if (length $link &&
+ ! exists $oldlinks{$page} ||
+ ! grep { $_ eq $link } @{$oldlinks{$page}}) {
+ $linkchanged{$link}=1;
+ }
+ }
+ }
+ if (exists $oldlinks{$page}) {
+ foreach my $link (@{$oldlinks{$page}}) {
+ $link=bestlink($page, $link);
+ 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 $linkfile, to update its linkbacks");
+ render($linkfile);
+ }
+ }
+ }
+}
+
+# Generates a C wrapper program for running ikiwiki in a specific way.
+# The wrapper may be safely made suid.
+sub gen_wrapper ($$) {
+ my ($offline, $rebuild)=@_;
+
+ eval {use Cwd 'abs_path'};
+ $srcdir=abs_path($srcdir);
+ $destdir=abs_path($destdir);
+ my $this=abs_path($0);
+ if (! -x $this) {
+ error("$this doesn't seem to be executable");
+ }
+
+ my $call=qq{"$this", "$this", "$srcdir", "$destdir", "--wikiname=$wikiname"};
+ $call.=', "--verbose"' if $verbose;
+ $call.=', "--rebuild"' if $rebuild;
+ $call.=', "--offline"' if $offline;
+
+ open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
+ print OUT <<"EOF";
+/* A suid wraper for ikiwiki */
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+int main (void) {
+ clearenv();
+ execl($call, NULL);
+ perror("failed to run $this");
+ exit(1);
+}
+EOF
+ close OUT;
+ if (system("gcc", "ikiwiki-wrap.c", "-o", "ikiwiki-wrap") != 0) {
+ error("failed to compile ikiwiki-wrap.c");
+ }
+ unlink("ikiwiki-wrap.c");
+ print "successfully generated ikiwiki-wrap\n";
+ exit 0;
+}
+
+sub update () {
+ if (-d "$srcdir/.svn") {
+ if (system("svn", "update", "--quiet", $srcdir) != 0) {
+ warn("svn update failed\n");
+ }
+ }
+}
+
+my $rebuild=0;
+my $offline=0;
+my $gen_wrapper=0;
+if (grep /^-/, @ARGV) {
+ eval {use Getopt::Long};
+ GetOptions(
+ "wikiname=s" => \$wikiname,
+ "verbose|v" => \$verbose,
+ "rebuild" => \$rebuild,
+ "gen-wrapper" => \$gen_wrapper,
+ "offline" => \$offline,
+ ) || usage();