X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/d1642e4cd9d77b2be6c20690912559b89b1dce2b..741c33576e358d555e623a49d42edd33924a19ab:/IkiWiki/Plugin/po.pm

diff --git a/IkiWiki/Plugin/po.pm b/IkiWiki/Plugin/po.pm
index 61331edeb..2939bcd9a 100644
--- a/IkiWiki/Plugin/po.pm
+++ b/IkiWiki/Plugin/po.pm
@@ -1,7 +1,7 @@
 #!/usr/bin/perl
 # .po as a wiki page type
 # Licensed under GPL v2 or greater
-# Copyright (C) 2008 intrigeri <intrigeri@boum.org>
+# Copyright (C) 2008-2009 intrigeri <intrigeri@boum.org>
 # inspired by the GPL'd po4a-translate,
 # which is Copyright 2002, 2003, 2004 by Martin Quinson (mquinson#debian.org)
 package IkiWiki::Plugin::po;
@@ -10,6 +10,7 @@ use warnings;
 use strict;
 use IkiWiki 3.00;
 use Encode;
+use Locale::Po4a::Common qw(nowrapi18n !/.*/);
 use Locale::Po4a::Chooser;
 use Locale::Po4a::Po;
 use File::Basename;
@@ -31,19 +32,19 @@ sub import {
 	hook(type => "getsetup", id => "po", call => \&getsetup);
 	hook(type => "checkconfig", id => "po", call => \&checkconfig);
 	hook(type => "needsbuild", id => "po", call => \&needsbuild);
-	hook(type => "scan", id => "po", call => \&scan, last =>1);
+	hook(type => "scan", id => "po", call => \&scan, last => 1);
 	hook(type => "filter", id => "po", call => \&filter);
 	hook(type => "htmlize", id => "po", call => \&htmlize);
 	hook(type => "pagetemplate", id => "po", call => \&pagetemplate, last => 1);
-	hook(type => "postscan", id => "po", call => \&postscan);
 	hook(type => "rename", id => "po", call => \&renamepages, first => 1);
 	hook(type => "delete", id => "po", call => \&mydelete);
 	hook(type => "change", id => "po", call => \&change);
-	hook(type => "cansave", id => "po", call => \&cansave);
+	hook(type => "checkcontent", id => "po", call => \&checkcontent);
 	hook(type => "canremove", id => "po", call => \&canremove);
 	hook(type => "canrename", id => "po", call => \&canrename);
 	hook(type => "editcontent", id => "po", call => \&editcontent);
-	hook(type => "formbuilder_setup", id => "po", call => \&formbuilder_setup);
+	hook(type => "formbuilder_setup", id => "po", call => \&formbuilder_setup, last => 1);
+	hook(type => "formbuilder", id => "po", call => \&formbuilder);
 
 	$origsubs{'bestlink'}=\&IkiWiki::bestlink;
 	inject(name => "IkiWiki::bestlink", call => \&mybestlink);
@@ -53,8 +54,8 @@ sub import {
 	inject(name => "IkiWiki::targetpage", call => \&mytargetpage);
 	$origsubs{'urlto'}=\&IkiWiki::urlto;
 	inject(name => "IkiWiki::urlto", call => \&myurlto);
-	$origsubs{'nicepagetitle'}=\&IkiWiki::nicepagetitle;
-	inject(name => "IkiWiki::nicepagetitle", call => \&mynicepagetitle);
+	$origsubs{'cgiurl'}=\&IkiWiki::cgiurl;
+	inject(name => "IkiWiki::cgiurl", call => \&mycgiurl);
 }
 
 
@@ -66,7 +67,7 @@ sub import {
 # 2. Injected functions
 # 3. Blackboxes for private data
 # 4. Helper functions
-# 5. PageSpec's
+# 5. PageSpecs
 
 
 # ,----
@@ -115,23 +116,18 @@ sub getsetup () {
 			safe => 1,
 			rebuild => 1,
 		},
-		po_translation_status_in_links => {
-			type => "boolean",
-			example => 1,
-			description => "display translation status in links to translations",
-			safe => 1,
-			rebuild => 1,
-		},
 }
 
 sub checkconfig () {
 	foreach my $field (qw{po_master_language po_slave_languages}) {
 		if (! exists $config{$field} || ! defined $config{$field}) {
-			error(sprintf(gettext("Must specify %s"), $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"));
+		error(gettext("At least one slave language must be defined ".
+			      "in po_slave_languages when using the po plugin"));
 	}
 	map {
 		islanguagecode($_)
@@ -145,21 +141,15 @@ sub checkconfig () {
 	    ! defined $config{po_link_to}) {
 		$config{po_link_to}='default';
 	}
-	elsif (! grep {
-			$config{po_link_to} eq $_
-		} ('default', 'current', 'negotiated')) {
-		warn(sprintf(gettext('po_link_to=%s is not a valid setting, falling back to po_link_to=default'),
-				$config{po_link_to}));
+	elsif ($config{po_link_to} !~ /^(default|current|negotiated)$/) {
+		warn(sprintf(gettext('%s is not a valid value for po_link_to, falling back to po_link_to=default'),
+			     $config{po_link_to}));
 		$config{po_link_to}='default';
 	}
 	elsif ($config{po_link_to} eq "negotiated" && ! $config{usedirs}) {
 		warn(gettext('po_link_to=negotiated requires usedirs to be enabled, falling back to po_link_to=default'));
 		$config{po_link_to}='default';
 	}
-	if (! exists $config{po_translation_status_in_links} ||
-	    ! defined $config{po_translation_status_in_links}) {
-		$config{po_translation_status_in_links}=1;
-	}
 	push @{$config{wiki_file_prune_regexps}}, qr/\.pot$/;
 }
 
@@ -188,8 +178,6 @@ sub scan (@) {
 	my $page=$params{page};
 	my $content=$params{content};
 
-	return unless UNIVERSAL::can("IkiWiki::Plugin::link", "import");
-
 	if (istranslation($page)) {
 		foreach my $destpage (@{$links{$page}}) {
 			if (istranslatable($destpage)) {
@@ -244,8 +232,8 @@ sub htmlize (@) {
 
 	# force content to be htmlize'd as if it was the same type as the master page
 	return IkiWiki::htmlize($page, $page,
-				pagetype(srcfile($pagesources{masterpage($page)})),
-				$content);
+		pagetype(srcfile($pagesources{masterpage($page)})),
+		$content);
 }
 
 sub pagetemplate (@) {
@@ -272,22 +260,20 @@ sub pagetemplate (@) {
 		$template->param(otherlanguages => [otherlanguagesloop($page)]);
 		map add_depends($page, $_), (values %{otherlanguages($page)});
 	}
-	# Rely on IkiWiki::Render's genpage() to decide wether
-	# a discussion link should appear on $page; this is not
-	# totally accurate, though: some broken links may be generated
-	# when cgiurl is disabled.
-	# This compromise avoids some code duplication, and will probably
-	# prevent future breakage when ikiwiki internals change.
-	# Known limitations are preferred to future random bugs.
-	if ($template->param('discussionlink') && istranslation($page)) {
-		$template->param('discussionlink' => htmllink(
-							$page,
-							$destpage,
-							$masterpage . '/' . gettext("Discussion"),
-							noimageinline => 1,
-							forcesubpage => 0,
-							linktext => gettext("Discussion"),
-							));
+	if ($config{discussion} && istranslation($page)) {
+		my $discussionlink=gettext("discussion");
+		if ($page !~ /.*\/\Q$discussionlink\E$/i &&
+		   (length $config{cgiurl} ||
+		    exists $links{$masterpage."/".$discussionlink})) {
+			$template->param('discussionlink' => htmllink(
+				$page,
+				$destpage,
+				$masterpage . '/' . gettext("Discussion"),
+				noimageinline => 1,
+				forcesubpage => 0,
+				linktext => gettext("Discussion"),
+		));
+		}
 	}
 	# Remove broken parentlink to ./index.html on home page's translations.
 	# It works because this hook has the "last" parameter set, to ensure it
@@ -299,59 +285,88 @@ sub pagetemplate (@) {
 	}
 } # }}}
 
-sub postscan (@) {
-	my %params = @_;
-	my $page = $params{page};
-
-	# backlinks involve back-dependencies, so that nicepagetitle effects,
-	# such as translation status displayed in links, are updated
-	use IkiWiki::Render;
-	map add_depends($page, $_), keys %{$IkiWiki::backlinks{$page}};
-}
-
 # Add the renamed page translations to the list of to-be-renamed pages.
-sub renamepages($$$) {
-	my ($torename, $cgi, $session) = (shift, shift, shift);
+sub renamepages (@) {
+	my %params = @_;
 
-	# copy the initial array, so that we can iterate on it AND
-	# modify it at the same time, without iterating on the items we
-	# pushed on it ourselves
-	my @torename=@{$torename};
+	my %torename = %{$params{torename}};
+	my $session = $params{session};
 
 	# Save the page(s) the user asked to rename, so that our
 	# canrename hook can tell the difference between:
 	#  - a translation being renamed as a consequence of its master page
 	#    being renamed
 	#  - a user trying to directly rename a translation
-	# This is why this hook has to be run first, before @torename is modified
-	# by other plugins.
-	$session->param(po_orig_torename => [ @torename ]);
+	# This is why this hook has to be run first, before the list of pages
+	# to rename is modified by other plugins.
+	my @orig_torename;
+	@orig_torename=@{$session->param("po_orig_torename")}
+		if defined $session->param("po_orig_torename");
+	push @orig_torename, $torename{src};
+	$session->param(po_orig_torename => \@orig_torename);
 	IkiWiki::cgi_savesession($session);
 
-	foreach my $rename (@torename) {
-		next unless istranslatable($rename->{src});
-		my %otherpages=%{otherlanguages($rename->{src})};
-		while (my ($lang, $otherpage) = each %otherpages) {
-			push @{$torename}, {
-				src => $otherpage,
-				srcfile => $pagesources{$otherpage},
-				dest => otherlanguage($rename->{dest}, $lang),
-				destfile => $rename->{dest}.".".$lang.".po",
-				required => 0,
-			};
-		}
+	return () unless istranslatable($torename{src});
+
+	my @ret;
+	my %otherpages=%{otherlanguages($torename{src})};
+	while (my ($lang, $otherpage) = each %otherpages) {
+		push @ret, {
+			src => $otherpage,
+			srcfile => $pagesources{$otherpage},
+			dest => otherlanguage($torename{dest}, $lang),
+			destfile => $torename{dest}.".".$lang.".po",
+			required => 0,
+		};
 	}
+	return @ret;
 }
 
-sub mydelete(@) {
+sub mydelete (@) {
 	my @deleted=@_;
 
 	map { deletetranslations($_) } grep istranslatablefile($_), @deleted;
 }
 
-sub change(@) {
+sub change (@) {
 	my @rendered=@_;
 
+	# All meta titles are first extracted at scan time, i.e. before we turn
+	# PO files back into translated markdown; escaping of double-quotes in
+	# PO files breaks the meta plugin's parsing enough to save ugly titles
+	# to %pagestate at this time.
+	#
+	# Then, at render time, every page passes in turn through the Great
+	# Rendering Chain (filter->preprocess->linkify->htmlize), and the meta
+	# plugin's preprocess hook is this time in a position to correctly
+	# extract the titles from slave pages.
+	#
+	# This is, unfortunately, too late: if the page A, linking to the page
+	# B, is rendered before B, it will display the wrongly-extracted meta
+	# title as the link text to B.
+	#
+	# On the one hand, such a corner case only happens on rebuild: on
+	# refresh, every rendered page is fixed to contain correct meta titles.
+	# On the other hand, it can take some time to get every page fixed.
+	# We therefore re-render every rendered page after a rebuild to fix them
+	# at once. As this more or less doubles the time needed to rebuild the
+	# wiki, we do so only when really needed.
+
+	if (@rendered
+	    && exists $config{rebuild} && defined $config{rebuild} && $config{rebuild}
+	    && UNIVERSAL::can("IkiWiki::Plugin::meta", "getsetup")
+	    && exists $config{meta_overrides_page_title}
+	    && defined $config{meta_overrides_page_title}
+	    && $config{meta_overrides_page_title}) {
+		debug(sprintf(gettext("re-rendering all pages to fix meta titles")));
+		resetalreadyfiltered();
+		require IkiWiki::Render;
+		foreach my $file (@rendered) {
+			debug(sprintf(gettext("rendering %s"), $file));
+			IkiWiki::render($file);
+		}
+	}
+
 	my $updated_po_files=0;
 
 	# Refresh/create POT and PO files as needed.
@@ -385,11 +400,11 @@ sub change(@) {
 	}
 }
 
-sub cansave ($$$$) {
-	my ($page, $content, $cgi, $session) = (shift, shift, shift, shift);
+sub checkcontent (@) {
+	my %params=@_;
 
-	if (istranslation($page)) {
-		my $res = isvalidpo($content);
+	if (istranslation($params{page})) {
+		my $res = isvalidpo($params{content});
 		if ($res) {
 			return undef;
 		}
@@ -400,19 +415,19 @@ sub cansave ($$$$) {
 	return undef;
 }
 
-sub canremove ($$$) {
-	my ($page, $cgi, $session) = (shift, shift, shift);
+sub canremove (@) {
+	my %params = @_;
 
-	if (istranslation($page)) {
+	if (istranslation($params{page})) {
 		return gettext("Can not remove a translation. Removing the master page, ".
 			       "though, removes its translations as well.");
 	}
 	return undef;
 }
 
-sub canrename ($$@) {
-	my ($cgi, $session) = (shift, shift);
+sub canrename (@) {
 	my %params = @_;
+	my $session = $params{session};
 
 	if (istranslation($params{src})) {
 		my $masterpage = masterpage($params{src});
@@ -423,7 +438,7 @@ sub canrename ($$@) {
 		# by looking for the master page in the list of to-be-renamed pages we
 		# saved early in the renaming process.
 		my $orig_torename = $session->param("po_orig_torename");
-		unless (scalar grep { $_->{src} eq $masterpage } @{$orig_torename}) {
+		unless (grep { $_ eq $masterpage } @{$orig_torename}) {
 			return gettext("Can not rename a translation. Renaming the master page, ".
 				       "though, renames its translations as well.");
 		}
@@ -445,13 +460,57 @@ sub formbuilder_setup (@) {
 	my $form=$params{form};
 	my $q=$params{cgi};
 
-	return unless (defined $form->field("do") && $form->field("do") eq "create");
+	return unless defined $form->field("do");
 
-	my $template=template("pocreatepage.tmpl");
-	$template->param(LANG => $config{po_master_language}{name});
-	$form->tmpl_param(message => $template->output);
+	if ($form->field("do") eq "create") {
+		# Warn the user: new pages must be written in master language.
+		my $template=template("pocreatepage.tmpl");
+		$template->param(LANG => $config{po_master_language}{name});
+		$form->tmpl_param(message => $template->output);
+	}
+	elsif ($form->field("do") eq "edit") {
+		# Remove the rename/remove buttons on slave pages.
+		# This has to be done after the rename/remove plugins have added
+		# their buttons, which is why this hook must be run last.
+		# The canrename/canremove hooks already ensure this is forbidden
+		# at the backend level, so this is only UI sugar.
+		if (istranslation($form->field("page"))) {
+			map {
+				for (my $i = 0; $i < @{$params{buttons}}; $i++) {
+					if (@{$params{buttons}}[$i] eq $_) {
+						delete  @{$params{buttons}}[$i];
+						last;
+					}
+				}
+			} qw(Rename Remove);
+		}
+	}
 }
 
+sub formbuilder (@) {
+	my %params=@_;
+	my $form=$params{form};
+	my $q=$params{cgi};
+
+	return unless defined $form->field("do");
+
+	# Do not allow to create pages of type po: they are automatically created.
+	# The main reason to do so is to bypass the "favor the type of linking page
+	# on page creation" logic, which is unsuitable when a broken link is clicked
+	# on a slave (PO) page.
+	# This cannot be done in the formbuilder_setup hook as the list of types is
+	# computed later.
+	if ($form->field("do") eq "create") {
+	        foreach my $field ($form->field) {
+			next unless "$field" eq "type";
+			if ($field->type eq 'select') {
+				# remove po from the list of types
+				my @types = grep { $_ ne 'po' } $field->options;
+				$field->options(\@types) if @types;
+			}
+		}
+	}
+}
 
 # ,----
 # | Injected functions
@@ -535,13 +594,14 @@ sub myurlto ($$;$) {
 	}
 }
 
-sub mynicepagetitle ($;$) {
-	my ($page, $unescaped) = (shift, shift);
+sub mycgiurl (@) {
+	my %params=@_;
 
-	my $res = $origsubs{'nicepagetitle'}->($page, $unescaped);
-	return $res unless istranslation($page);
-	return $res unless $config{po_translation_status_in_links};
-	return $res.' ('.percenttranslated($page).'&nbsp;%)';
+	# slave pages have no subpages
+	if (istranslation($params{'from'})) {
+		$params{'from'} = masterpage($params{'from'});
+	}
+	return $origsubs{'cgiurl'}->(%params);
 }
 
 # ,----
@@ -555,8 +615,8 @@ sub mynicepagetitle ($;$) {
 		my $page=shift;
 		my $destpage=shift;
 
-		return ( exists $filtered{$page}{$destpage}
-			 && $filtered{$page}{$destpage} eq 1 );
+		return exists $filtered{$page}{$destpage}
+			 && $filtered{$page}{$destpage} eq 1;
 	}
 
 	sub setalreadyfiltered($$) {
@@ -596,8 +656,10 @@ sub istranslatablefile ($) {
 	my $file=shift;
 
 	return 0 unless defined $file;
-	return 0 if (defined pagetype($file) && pagetype($file) eq 'po');
+	my $type=pagetype($file);
+	return 0 if ! defined $type || $type eq 'po';
 	return 0 if $file =~ /\.pot$/;
+	return 0 unless -e "$config{srcdir}/$file"; # underlay dirs may be read-only
 	return 1 if pagespec_match(pagename($file), $config{po_translatable_pages});
 	return;
 }
@@ -613,18 +675,19 @@ sub istranslatable ($) {
 sub _istranslation ($) {
 	my $page=shift;
 
+	$page='' unless defined $page && length $page;
 	my $hasleadingslash = ($page=~s#^/##);
 	my $file=$pagesources{$page};
-	return 0 unless (defined $file
+	return 0 unless defined $file
 			 && defined pagetype($file)
-			 && pagetype($file) eq 'po');
+			 && pagetype($file) eq 'po';
 	return 0 if $file =~ /\.pot$/;
 
 	my ($masterpage, $lang) = ($page =~ /(.*)[.]([a-z]{2})$/);
-	return 0 unless (defined $masterpage && defined $lang
+	return 0 unless defined $masterpage && defined $lang
 			 && length $masterpage && length $lang
 			 && defined $pagesources{$masterpage}
-			 && defined $config{po_slave_languages}{$lang});
+			 && defined $config{po_slave_languages}{$lang};
 
 	return (maybe_add_leading_slash($masterpage, $hasleadingslash), $lang)
 		if istranslatable($masterpage);
@@ -638,7 +701,7 @@ sub istranslation ($) {
 		$translations{$masterpage}{$lang}=$page unless exists $translations{$masterpage}{$lang};
 		return (maybe_add_leading_slash($masterpage, $hasleadingslash), $lang);
 	}
-	return;
+	return "";
 }
 
 sub masterpage ($) {
@@ -662,7 +725,7 @@ sub lang ($) {
 sub islanguagecode ($) {
 	my $code=shift;
 
-	return ($code =~ /^[a-z]{2}$/);
+	return $code =~ /^[a-z]{2}$/;
 }
 
 sub otherlanguage ($$) {
@@ -677,7 +740,7 @@ sub otherlanguages ($) {
 	my $page=shift;
 
 	my %ret;
-	return \%ret unless (istranslation($page) || istranslatable($page));
+	return \%ret unless istranslation($page) || istranslatable($page);
 	my $curlang=lang($page);
 	foreach my $lang
 		($config{po_master_language}{code}, keys %{$config{po_slave_languages}}) {
@@ -720,9 +783,10 @@ sub refreshpot ($) {
 	$doc->{TT}{file_in_charset} = 'utf-8';
 	$doc->{TT}{file_out_charset} = 'utf-8';
 	$doc->read($masterfile);
-	# let's cheat a bit to force porefs option to be passed to Locale::Po4a::Po;
-	# this is undocument use of internal Locale::Po4a::TransTractor's data,
-	# compulsory since this module prevents us from using the porefs option.
+	# let's cheat a bit to force porefs option to be passed to
+	# Locale::Po4a::Po; this is undocument use of internal
+	# Locale::Po4a::TransTractor's data, compulsory since this module
+	# prevents us from using the porefs option.
 	$doc->{TT}{po_out}=Locale::Po4a::Po->new({ 'porefs' => 'none' });
 	$doc->{TT}{po_out}->set_charset('utf-8');
 	# do the actual work
@@ -736,17 +800,23 @@ sub refreshpofiles ($@) {
 	my @pofiles=@_;
 
 	my $potfile=potfile($masterfile);
-	error("[po/refreshpofiles] POT file ($potfile) does not exist") unless (-e $potfile);
+	if (! -e $potfile) {
+		error("po(refreshpofiles) ".sprintf(gettext("POT file (%s) does not exist"), $potfile));
+	}
 
 	foreach my $pofile (@pofiles) {
 		IkiWiki::prep_writefile(basename($pofile),dirname($pofile));
 		if (-e $pofile) {
-			system("msgmerge", "-U", "--backup=none", $pofile, $potfile) == 0
-				or error("[po/refreshpofiles:$pofile] failed to update");
+			system("msgmerge", "-q", "-U", "--backup=none", $pofile, $potfile) == 0
+				or error("po(refreshpofiles) ".
+					 sprintf(gettext("failed to update %s"),
+						 $pofile));
 		}
 		else {
 			File::Copy::syscopy($potfile,$pofile)
-				or error("[po/refreshpofiles:$pofile] failed to copy the POT file");
+				or error("po(refreshpofiles) ".
+					 sprintf(gettext("failed to copy the POT file to %s"),
+						 $pofile));
 		}
 	}
 }
@@ -793,7 +863,8 @@ sub percenttranslated ($) {
 		'file_in_name'	=> [ $masterfile ],
 		'file_in_charset'  => 'utf-8',
 		'file_out_charset' => 'utf-8',
-	) or error("[po/percenttranslated:$page]: failed to translate");
+	) or error("po(percenttranslated) ".
+		   sprintf(gettext("failed to translate %s"), $page));
 	my ($percent,$hit,$queries) = $doc->stats();
 	$percent =~ s/\.[0-9]+$//;
 	return $percent;
@@ -833,10 +904,10 @@ sub otherlanguagesloop ($) {
 		}
 	}
 	return sort {
-			return -1 if $a->{code} eq $config{po_master_language}{code};
-			return 1 if $b->{code} eq $config{po_master_language}{code};
-			return $a->{language} cmp $b->{language};
-		} @ret;
+		return -1 if $a->{code} eq $config{po_master_language}{code};
+		return 1 if $b->{code} eq $config{po_master_language}{code};
+		return $a->{language} cmp $b->{language};
+	} @ret;
 }
 
 sub homepageurl (;$) {
@@ -867,7 +938,7 @@ sub deletetranslations ($) {
 		}
 	} @todelete;
 
-	if (scalar @todelete) {
+	if (@todelete) {
 		commit_and_refresh(
 			gettext("removed obsolete PO files"),
 			"IkiWiki::Plugin::po::deletetranslations");
@@ -922,17 +993,17 @@ sub po_to_markup ($$;$) {
 				     DIR => File::Spec->tmpdir,
 				     UNLINK => 1)->filename;
 
-	sub failure ($) {
-		my $msg = '[po/po_to_markup:'.$page.'] ' . shift;
+	my $fail = sub ($) {
+		my $msg = "po(po_to_markup) - $page : " . shift;
 		if ($nonfatal) {
 			warn $msg;
 			return undef;
 		}
 		error($msg, sub { unlink $infile, $outfile});
-	}
+	};
 
 	writefile(basename($infile), File::Spec->tmpdir, $content)
-		or return failure("failed to write $infile");
+		or return $fail->(sprintf(gettext("failed to write %s"), $infile));
 
 	my $masterfile = srcfile($pagesources{masterpage($page)});
 	my %options = (
@@ -944,10 +1015,12 @@ sub po_to_markup ($$;$) {
 		'file_in_name'	=> [ $masterfile ],
 		'file_in_charset'  => 'utf-8',
 		'file_out_charset' => 'utf-8',
-	) or return failure("failed to translate");
-	$doc->write($outfile) or return failure("could not write $outfile");
+	) or return $fail->(gettext("failed to translate"));
+	$doc->write($outfile)
+		or return $fail->(sprintf(gettext("failed to write %s"), $outfile));
 
-	$content = readfile($outfile) or return failure("could not read $outfile");
+	$content = readfile($outfile)
+		or return $fail->(sprintf(gettext("failed to read %s"), $outfile));
 
 	# Unlinking should happen automatically, thanks to File::Temp,
 	# but it does not work here, probably because of the way writefile()
@@ -977,14 +1050,14 @@ sub isvalidpo ($) {
 				    DIR => File::Spec->tmpdir,
 				    UNLINK => 1)->filename;
 
-	sub failure ($) {
+	my $fail = sub ($) {
 		my $msg = '[po/isvalidpo] ' . shift;
 		unlink $infile;
 		return IkiWiki::FailReason->new("$msg");
-	}
+	};
 
 	writefile(basename($infile), File::Spec->tmpdir, $content)
-		or return failure("failed to write $infile");
+		or return $fail->(sprintf(gettext("failed to write %s"), $infile));
 
 	my $res = (system("msgfmt", "--check", $infile, "-o", "/dev/null") == 0);
 
@@ -996,17 +1069,15 @@ sub isvalidpo ($) {
 	if ($res) {
 	    return IkiWiki::SuccessReason->new("valid gettext data");
 	}
-	return IkiWiki::FailReason->new("invalid gettext data");
+	return IkiWiki::FailReason->new("invalid gettext data, go back ".
+					"to previous page to go on with edit");
 }
 
 # ,----
-# | PageSpec's
+# | PageSpecs
 # `----
 
 package IkiWiki::PageSpec;
-use warnings;
-use strict;
-use IkiWiki 2.00;
 
 sub match_istranslation ($;@) {
 	my $page=shift;
@@ -1036,7 +1107,7 @@ sub match_lang ($$;@) {
 
 	my $regexp=IkiWiki::glob2re($wanted);
 	my $lang=IkiWiki::Plugin::po::lang($page);
-	if ($lang!~/^$regexp$/i) {
+	if ($lang !~ /^$regexp$/i) {
 		return IkiWiki::FailReason->new("file language is $lang, not $wanted");
 	}
 	else {