Fix xdg_base upgrade logic (#3227)

packages/xdg_base.rb

@@ -3,19 +3,31 @@ require 'package'
 class Xdg_base < Package
   description 'XDG Base Directory Specification Configuration'
   homepage 'https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html'
-  version '0.7-3'
+  version '0.7-4'
   source_url 'file:///dev/null'
   source_sha256 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'
 
   def self.preinstall
     # Save any previous configuration, if it exists.
     if Dir.exists? "#{HOME}/.config"
-      FileUtils.cp_r("#{HOME}/.config", "#{CREW_PREFIX}/")
-      FileUtils.rm_rf("#{HOME}/.config")
+      if File.readlink("#{HOME}/.config") != "#{CREW_PREFIX}/.config"
+        puts('File.readlink("#{HOME}/.config") != "#{CREW_PREFIX}/.config"') # Debug message
+        if !FileUtils.cp_r("#{HOME}/.config", "#{CREW_PREFIX}/")
+          puts('FileUtils.cp_r("#{HOME}/.config", "#{CREW_PREFIX}/")') # Debug
+          FileUtils.rm_rf("#{HOME}/.config")
+        end
+      end
     end
     if Dir.exists? "#{HOME}/.local"
+      puts('Dir.exists? "#{HOME}/.local"') # Debug
       FileUtils.mkdir_p("#{CREW_PREFIX}/.config") unless Dir.exists? "#{CREW_PREFIX}/.config"
-      FileUtils.rm_rf("#{HOME}/.local") if FileUtils.cp_r("#{HOME}/.local/.", "#{CREW_PREFIX}/.config/")
+      if File.readlink("#{HOME}/.local") != "#{CREW_PREFIX}/.config"
+        puts('File.readlink("#{HOME}/.local") != "#{CREW_PREFIX}/.config"') # Debug
+        if !FileUtils.cp_r("#{HOME}/.local/.", "#{CREW_PREFIX}/.config/")
+          puts('FileUtils.cp_r("#{HOME}/.local/.", "#{CREW_PREFIX}/.config/")') # Debug
+          FileUtils.rm_rf("#{HOME}/.local") 
+        end
+      end
     end
   end
 
@@ -30,7 +42,7 @@ class Xdg_base < Package
 
   def self.postinstall
     puts
-    puts 'The following bash environment variables should be set as shown below:'.lightblue
+    puts 'The following environment variables should be set as shown below:'.lightblue
     puts
     puts "echo '# XDG Base Directory Specification Environment Variables' >> ~/.bashrc".lightblue
     puts "echo '# See https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html' >> ~/.bashrc".lightblue