page: artist-alias: don't overshadow a normal artist page

Author: towerofnix

src/page/artist-alias.js

@@ -4,7 +4,7 @@ export function targets({wikiData}) {
   return wikiData.artistData.filter(artist => artist.isAlias);
 }
 
-export function pathsForTarget(aliasArtist) {
+export function pathsForTarget(aliasArtist, {wikiData: {artistData}}) {
   const {aliasedArtist} = aliasArtist;
 
   // Don't generate a redirect page if this aliased name resolves to the same
@@ -13,6 +13,14 @@ export function pathsForTarget(aliasArtist) {
     return [];
   }
 
+  // And don't generate a redirect page if this aliased name resolves to the
+  // same directory as any *other, non-alias* artist. In that case we really
+  // just need the page (at this directory) to lead to the actual artist with
+  // this directory - not be a redirect. See issue #543.
+  if (artistData.some(artist => artist.directory === aliasArtist.directory)) {
+    return [];
+  }
+
   return [
     {
       type: 'redirect',