po: Support running with a non-english master lang; add translated underlays

It seem to make sense to remove the check for there being slave languages
as part of this, since one might want a wiki that is only in non-English.

diff --git a/IkiWiki/Plugin/po.pm b/IkiWiki/Plugin/po.pm
index 2939bcd9aac1cae6a34847e303bb701ef84fde7e..5d2d42d3bdf00b3b2b54c68e99318b6ec83499ca 100644 (file)
--- a/IkiWiki/Plugin/po.pm
+++ b/IkiWiki/Plugin/po.pm
@@ -119,20 +119,18 @@ sub getsetup () {
 }
 
 sub checkconfig () {
-       foreach my $field (qw{po_master_language po_slave_languages}) {
+       foreach my $field (qw{po_master_language}) {
                if (! exists $config{$field} || ! defined $config{$field}) {
                        error(sprintf(gettext("Must specify %s when using the %s plugin"),
                                      $field, 'po'));
                }
        }
-       if (! (keys %{$config{po_slave_languages}})) {
-               error(gettext("At least one slave language must be defined ".
-                             "in po_slave_languages when using the po plugin"));
-       }
+
        map {
                islanguagecode($_)
                        or error(sprintf(gettext("%s is not a valid language code"), $_));
        } ($config{po_master_language}{code}, keys %{$config{po_slave_languages}});
+
        if (! exists $config{po_translatable_pages} ||
            ! defined $config{po_translatable_pages}) {
                $config{po_translatable_pages}="";
@@ -150,7 +148,16 @@ sub checkconfig () {
                warn(gettext('po_link_to=negotiated requires usedirs to be enabled, falling back to po_link_to=default'));
                $config{po_link_to}='default';
        }
+
        push @{$config{wiki_file_prune_regexps}}, qr/\.pot$/;
+
+       if ($config{po_master_language}{code} ne 'en') {
+               # use translated underlay directories in preference
+               # to the untranslated ones
+               foreach my $underlay ('basewiki', reverse @{$config{underlaydirs}}) {
+                       add_underlay("locale/".$config{po_master_language}{code}."/".$underlay);
+               }
+       }
 }
 
 sub needsbuild () {