[rubygems/rubygems] Handle RubyGems installing to custom dir with non-existent parent dirs

ruby/rubygems@4701123601

Author: larouxn

lib/rubygems/installer.rb

@@ -953,11 +953,7 @@ def write_cache_file
   end
 
   def ensure_writable_dir(dir) # :nodoc:
-    begin
-      Dir.mkdir dir, *[options[:dir_mode] && 0o755].compact
-    rescue SystemCallError
-      raise unless File.directory? dir
-    end
+    FileUtils.mkdir_p dir, mode: options[:dir_mode] && 0o755
 
     raise Gem::FilePermissionError.new(dir) unless File.writable? dir
   end

test/rubygems/installer_test_case.rb

@@ -221,6 +221,23 @@ def util_installer(spec, gem_home, force=true)
                        force: force)
   end
 
+  def test_ensure_writable_dir_creates_missing_parent_directories
+    installer = setup_base_installer(false)
+
+    non_existent_parent = File.join(@tempdir, "non_existent_parent")
+    target_dir = File.join(non_existent_parent, "target_dir")
+
+    refute_directory_exists non_existent_parent, "Parent directory should not exist yet"
+    refute_directory_exists target_dir, "Target directory should not exist yet"
+
+    assert_nothing_raised do
+      installer.send(:ensure_writable_dir, target_dir)
+    end
+
+    assert_directory_exists non_existent_parent, "Parent directory should exist now"
+    assert_directory_exists target_dir, "Target directory should exist now"
+  end
+
   @@symlink_supported = nil
 
   # This is needed for Windows environment without symlink support enabled (the default

test/rubygems/test_gem_commands_install_command.rb

@@ -1583,4 +1583,31 @@ def test_suggest_update_if_enabled
       assert_includes @ui.output, "A new release of RubyGems is available: 1.2.3 → 2.0.0!"
     end
   end
+
+  def test_execute_bindir_with_nonexistent_parent_dirs
+    spec_fetcher do |fetcher|
+      fetcher.gem "a", 2 do |s|
+        s.executables = %w[a_bin]
+        s.files = %w[bin/a_bin]
+      end
+    end
+
+    @cmd.options[:args] = %w[a]
+
+    nested_bin_dir = File.join(@tempdir, "not", "exists")
+    refute_directory_exists nested_bin_dir, "Nested bin directory should not exist yet"
+
+    @cmd.options[:bin_dir] = nested_bin_dir
+
+    use_ui @ui do
+      assert_raise Gem::MockGemUi::SystemExitException, @ui.error do
+        @cmd.execute
+      end
+    end
+
+    assert_directory_exists nested_bin_dir, "Nested bin directory should exist now"
+    assert_path_exist File.join(nested_bin_dir, "a_bin")
+
+    assert_equal %w[a-2], @cmd.installed_specs.map(&:full_name)
+  end
 end