build blacklight css from blacklight gem

app/assets/stylesheets/geoblacklight.scss

@@ -1,3 +1,3 @@
 @import 'bootstrap/scss/bootstrap';
-@import 'blacklight-frontend/app/assets/stylesheets/blacklight/blacklight';
+@import 'blacklight/blacklight';
 @import '@geoblacklight/frontend/app/assets/stylesheets/geoblacklight/geoblacklight';

bin/build-css

@@ -0,0 +1,26 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# Compile CSS files using dart-sass, but loading stylesheets from upstream engines for
+# ease of development.
+#
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
+
+bundle_binstub = File.expand_path("bundle", __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300) =~ /This file was generated by Bundler/
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require "rubygems"
+require "bundler/setup"
+
+require 'blacklight'
+
+`npx sass ./app/assets/stylesheets/geoblacklight.scss:./app/assets/builds/geoblacklight.css --no-source-map --load-path=node_modules --load-path=#{"#{Blacklight::Engine.root}/app/assets/stylesheets"} --load-path=node_modules #{ARGV.join(' ')}`

package.json

@@ -15,6 +15,6 @@
     "sass": "^1.77.8"
   },
   "scripts": {
-    "build:css": "sass ./app/assets/stylesheets/geoblacklight.scss:./app/assets/builds/geoblacklight.css --load-path=node_modules"
+    "build:css": "bin/build-css"
   }
 }