IkiWiki/Plugin/transient.pm

   1 #!/usr/bin/perl
   2 package IkiWiki::Plugin::transient;
   3
   4 use warnings;
   5 use strict;
   6 use IkiWiki 3.00;
   7
   8 sub import {
   9         hook(type => "getsetup", id => "transient",  call => \&getsetup);
  10         hook(type => "checkconfig", id => "transient", call => \&checkconfig);
  11         hook(type => "change", id => "transient", call => \&change);
  12 }
  13
  14 sub getsetup () {
  15         return
  16                 plugin => {
  17                         # this plugin is safe but only makes sense as a
  18                         # dependency; similarly, it needs a rebuild but
  19                         # only if something else does
  20                         safe => 0,
  21                         rebuild => 0,
  22                 },
  23 }
  24
  25 our $transientdir;
  26
  27 sub checkconfig () {
  28         if (defined $config{wikistatedir}) {
  29                 $transientdir = $config{wikistatedir}."/transient";
  30                 # add_underlay treats relative underlays as relative to the installed
  31                 # location, not the cwd. That's not what we want here.
  32                 IkiWiki::add_literal_underlay($transientdir);
  33         }
  34 }
  35
  36 sub change (@) {
  37         foreach my $file (@_) {
  38                 # If the corresponding file exists in the transient underlay
  39                 # and isn't actually being used, we can get rid of it.
  40                 # Assume that the file that just changed has the same extension
  41                 # as the obsolete transient version: this'll be true for web
  42                 # edits, and avoids invoking File::Find.
  43                 my $casualty = "$transientdir/$file";
  44                 if (srcfile($file) ne $casualty && -e $casualty) {
  45                         debug(sprintf(gettext("removing transient version of %s"), $file));
  46                         IkiWiki::prune($casualty);
  47                 }
  48         }
  49 }
  50
  51 1;