remote-mediawiki: show known namespace choices on failure

If we fail to find a requested namespace, we should tell the user
which ones we know about, since those were already fetched. This
allows users to fetch all namespaces by specifying a dummy namespace,
failing, then copying the list of namespaces in the config.

Eventually, we should have a flag that allows fetching all namespaces
automatically.

Reviewed-by: Antoine Beaupré <anarcat@debian.org>
Signed-off-by: Antoine Beaupré <anarcat@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index a1d7837891e35640c6cd7f31161fc498f109c9a5..5e8845893c7cea8fdeb390681f47073a9ef0632f 100755 (executable)
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -1334,7 +1334,8 @@ sub get_mw_namespace_id {
        my $id;
 
        if (!defined $ns) {
-               print {*STDERR} "No such namespace ${name} on MediaWiki.\n";
+               my @namespaces = map { s/ /_/g; $_; } sort keys %namespace_id;
+               print {*STDERR} "No such namespace ${name} on MediaWiki, known namespaces: @namespaces\n";
                $ns = {is_namespace => 0};
                $namespace_id{$name} = $ns;
        }