Keep fallback language files

[tlbonum]

Hi, not sure what causes this, but some of our clients attempts to load the default/fallback(?) locale files, (the ones not suffixed by _.json, i.e. Legend.json instead of Legend_en.json). We are seeing the following error in our logs:

["[esri.widgets.Widget]","widget-intl:locale-error","esri.widgets.Legend",{"details":{"errors":"[Array]"},"message":"Errors occurred while loading \"esri/widgets/Legend/t9n/Legend\"","name":"intl:message-bundle-error"}]

This happens because the plugin ignores copying these files, if the "locales" option is used. Maybe this is intentional, and there's actually a way to force clients to use a specific locale?

The following patch keeps the files:

diff --git a/node_modules/@arcgis/webpack-plugin/lib/requiredPlugins.js b/node_modules/@arcgis/webpack-plugin/lib/requiredPlugins.js
index 428465d..eada295 100644
--- a/node_modules/@arcgis/webpack-plugin/lib/requiredPlugins.js
+++ b/node_modules/@arcgis/webpack-plugin/lib/requiredPlugins.js
@@ -48,7 +48,7 @@ module.exports = function requiredPlugins(locales = []) {
   }
 
   const localesIgnoreList = locales.map((locale) => `*_${locale}`).join("|");
-  const localesIgnoreGlob = `**/!(${localesIgnoreList}).json`;
+  const localesIgnoreGlob = `**/!(${localesIgnoreList}|!(*_*)).json`;
   const ignoreSass = "**/*.scss";
   return [
     // Copy non-packed resources needed by the app to the build directory

This issue body was partially generated by patch-package.

[odoe]

I'll take a look at the copy script. It's probably missing the widget ones.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[andygup]

Closing issue in preparation for repo archiving.