Fail builds if no files were installed (#13644)

bin/crew

@@ -961,8 +961,12 @@ def prepare_package(destdir)
       [e[1..], File.symlink?(e) ? 0 : File.size(e)]
     end
 
+    # If the package is completely empty, something has probably gone wrong.
+    total_size = filelist.values.sum
+    abort 'total_size is 0. It seems that no files were installed.'.lightred if total_size.zero?
+
     File.write 'filelist', <<~EOF
-      # Total size: #{filelist.values.sum}
+      # Total size: #{total_size}
       #{filelist.keys.sort.join("\n")}
     EOF
 

lib/const.rb

@@ -4,7 +4,7 @@ require 'etc'
 require 'open3'
 
 OLD_CREW_VERSION = defined?(CREW_VERSION) ? CREW_VERSION : '1.0'
-CREW_VERSION = '1.68.3' unless defined?(CREW_VERSION) && CREW_VERSION == OLD_CREW_VERSION
+CREW_VERSION = '1.68.4' unless defined?(CREW_VERSION) && CREW_VERSION == OLD_CREW_VERSION
 
 # Kernel architecture.
 KERN_ARCH = Etc.uname[:machine]