fix(codesign): prevent "bundle format unrecognized" error from codesign

Apple's codesign CLI toolthrows a "bundle format unrecognized" error if
there are any folders within the application that contain two dots in
their name.

Hence we need to get rid of the one instance of that we end up with from
GCC, and update the native-comp patch accordingly.

As of writing, this means renaming:
Emacs.app/Contents/MacOS/lib/gcc/11/gcc/x86_64-apple-darwin20/11.1.0

To:
Emacs.app/Contents/MacOS/lib/gcc/11/gcc/x86_64-apple-darwin20/11

build-emacs-for-macos

@@ -713,7 +713,9 @@ class GccLibEmbedder < AbstractEmbedder
 
     FileUtils.mkdir_p(File.dirname(target_dir))
     FileUtils.cp_r(source_dir, target_dir)
-    FileUtils.rm(Dir[File.join(target_dir, '**/.DS_Store')], force: true)
+    FileUtils.rm(Dir[File.join(target_dir, '**', '.DS_Store')], force: true)
+    FileUtils.chmod_R('u+w', target_dir)
+    FileUtils.mv(source_darwin_dir, target_darwin_dir)
   end
 
   private
@@ -726,9 +728,21 @@ class GccLibEmbedder < AbstractEmbedder
     File.join(invocation_dir, gcc_info.relative_lib_dir)
   end
 
+  def source_darwin_dir
+    File.join(invocation_dir, gcc_info.relative_darwin_lib_dir)
+  end
+
+  def target_darwin_dir
+    File.join(invocation_dir, gcc_info.sanitized_relative_darwin_lib_dir)
+  end
+
   def source_dir
     gcc_info.lib_dir
   end
+
+  def relative_dir(path, root)
+    Pathname.new(path).relative_path_from(Pathname.new(root)).to_s
+  end
 end
 
 class GccInfo
@@ -768,6 +782,17 @@ class GccInfo
     @relative_darwin_lib_dir ||= relative_dir(darwin_lib_dir, root_dir)
   end
 
+  # Sanitize folder name with full "MAJOR.MINOR.PATCH" version number to just
+  # the MAJOR version. Apple's codesign CLI tool throws a "bundle format
+  # unrecognized" error if there are any folders with two dots in their name
+  # within the Emacs.app application bundle.
+  def sanitized_relative_darwin_lib_dir
+    @sanitized_relative_darwin_lib_dir ||= File.join(
+      File.dirname(relative_darwin_lib_dir),
+      File.basename(relative_darwin_lib_dir).split('.').first
+    )
+  end
+
   def libgccjit_root_dir
     @libgccjit_root_dir ||= `brew --prefix libgccjit`.chomp
   end
@@ -812,10 +837,7 @@ class GccInfo
   private
 
   def relative_dir(path, root)
-    root += '/' unless root[-1] == '/'
-    return if path[0..root.size - 1] != root
-
-    path[root.size..-1]
+    Pathname.new(path).relative_path_from(Pathname.new(root)).to_s
   end
 end
 

patches/native-comp-env-setup.diff.erb

@@ -1,10 +1,10 @@
 diff --git a/lisp/emacs-lisp/comp.el b/lisp/emacs-lisp/comp.el
-index 4036080976..2ff8dbd74c 100644
+index 8c638312b0..87af889ef4 100644
 --- a/lisp/emacs-lisp/comp.el
 +++ b/lisp/emacs-lisp/comp.el
-@@ -4079,6 +4079,52 @@ of (commands) to run simultaneously."
+@@ -4215,6 +4215,52 @@ native-compile-async
    (let ((load (not (not load))))
-     (native--compile-async paths recursively load selector)))
+     (native--compile-async files recursively load selector)))
  
 +;;;###autoload
 +(defun native-compile-setup-environment-variables (&rest _args)
@@ -19,7 +19,7 @@ index 4036080976..2ff8dbd74c 100644
 +                     "<%= relative_lib_dir %>"
 +                     invocation-directory))
 +           (darwin-dir (expand-file-name
-+                        "<%= relative_darwin_lib_dir %>"
++                        "<%= sanitized_relative_darwin_lib_dir %>"
 +                        invocation-directory))
 +           (lib-paths (list)))
 +
@@ -54,4 +54,4 @@ index 4036080976..2ff8dbd74c 100644
 +
  (provide 'comp)
  
- ;;; comp.el ends here
+ ;; LocalWords: limplified limplified limplification limplify Limple LIMPLE libgccjit elc eln