Merge branch 'ready/autoindex-autofile' into HEAD

diff --git a/IkiWiki/Plugin/transient.pm b/IkiWiki/Plugin/transient.pm
new file mode 100644 (file)
index 0000000..c482b85
--- /dev/null
+++ b/IkiWiki/Plugin/transient.pm
@@ -0,0 +1,49 @@
+#!/usr/bin/perl
+package IkiWiki::Plugin::transient;
+
+use warnings;
+use strict;
+use IkiWiki 3.00;
+
+sub import {
+       hook(type => "getsetup", id => "transient",  call => \&getsetup);
+       hook(type => "checkconfig", id => "transient", call => \&checkconfig);
+       hook(type => "change", id => "transient", call => \&change);
+}
+
+sub getsetup () {
+       return
+               plugin => {
+                       # this plugin is safe but only makes sense as a
+                       # dependency; similarly, it needs a rebuild but
+                       # only if something else does
+                       safe => 0,
+                       rebuild => 0,
+               },
+}
+
+our $transientdir;
+
+sub checkconfig () {
+       eval q{use Cwd 'abs_path'};
+       error($@) if $@;
+       $transientdir = abs_path($config{wikistatedir})."/transient";
+       add_underlay($transientdir);
+}
+
+sub change (@) {
+       foreach my $file (@_) {
+               # If the corresponding file exists in the transient underlay
+               # and isn't actually being used, we can get rid of it.
+               # Assume that the file that just changed has the same extension
+               # as the obsolete transient version: this'll be true for web
+               # edits, and avoids invoking File::Find.
+               my $casualty = "$transientdir/$file";
+               if (srcfile($file) ne $casualty && -e $casualty) {
+                       debug(sprintf(gettext("removing transient version of %s"), $file));
+                       IkiWiki::prune($casualty);
+               }
+       }
+}
+
+1;