Refactor Generators::AppBase to avoid blind rescues

Author: byroot

railties/lib/rails/generators/app_base.rb

@@ -529,38 +529,30 @@ def using_bun?
         using_js_runtime? && %w[bun].include?(options[:javascript])
       end
 
+      def capture_command(command, pattern)
+        `#{command}`[pattern]
+      rescue SystemCallError
+        nil
+      end
+
       def node_version
         if using_node?
           ENV.fetch("NODE_VERSION") do
-            `node --version`[/\d+\.\d+\.\d+/]
-          rescue
-            NODE_LTS_VERSION
+            capture_command("node --version", /\d+\.\d+\.\d+/) || NODE_LTS_VERSION
           end
         end
       end
 
       def dockerfile_yarn_version
-        version = begin
-          `yarn --version`[/\d+\.\d+\.\d+/]
-        rescue
-          nil
-        end
-
-        version || "latest"
+        capture_command("yarn --version", /\d+\.\d+\.\d+/) || "latest"
       end
 
       def yarn_through_corepack?
         using_node? and "#{dockerfile_yarn_version}" >= "2"
       end
 
       def dockerfile_bun_version
-        version = begin
-          `bun --version`[/\d+\.\d+\.\d+/]
-        rescue
-          nil
-        end
-
-        version || BUN_VERSION
+        capture_command("bun --version", /\d+\.\d+\.\d+/) || BUN_VERSION
       end
 
       def dockerfile_binfile_fixups