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#!/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 () {
if (defined $config{wikistatedir}) {
$transientdir = $config{wikistatedir}."/transient";
# add_underlay treats relative underlays as relative to the installed
# location, not the cwd. That's not what we want here.
IkiWiki::add_literal_underlay($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;
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