Add Ruby 3.0 support (#16046)

* Fix issues with POSIX::Spawn, Terrapin and Ruby 3.0

Also improve the Terrapin monkey-patch for the stderr/stdout issue.

* Fix keyword argument handling throughout the codebase

* Monkey-patch Paperclip to fix keyword arguments handling in validators

* Change validation_extensions to please CodeClimate

* Bump microformats from 4.2.1 to 4.3.1

* Allow Ruby 3.0

* Add Ruby 3.0 test target to CircleCI

* Add test for admin dashboard warnings

* Fix admin dashboard warnings on Ruby 3.0

1 files changed, 58 insertions, 0 deletions

diff --git a/lib/paperclip/validation_extensions.rb b/lib/paperclip/validation_extensions.rb
new file mode 100644
index 000000000..0df0434f6
--- /dev/null
+++ b/lib/paperclip/validation_extensions.rb
@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+# Monkey-patch various Paperclip validators for Ruby 3.0 compatibility
+
+module Paperclip
+  module Validators
+    module AttachmentSizeValidatorExtensions
+      def validate_each(record, attr_name, _value)
+        base_attr_name = attr_name
+        attr_name = "#{attr_name}_file_size".to_sym
+        value = record.send(:read_attribute_for_validation, attr_name)
+
+        if value.present?
+          options.slice(*Paperclip::Validators::AttachmentSizeValidator::AVAILABLE_CHECKS).each do |option, option_value|
+            option_value = option_value.call(record) if option_value.is_a?(Proc)
+            option_value = extract_option_value(option, option_value)
+
+            next if value.send(Paperclip::Validators::AttachmentSizeValidator::CHECKS[option], option_value)
+
+            error_message_key = options[:in] ? :in_between : option
+            [attr_name, base_attr_name].each do |error_attr_name|
+              record.errors.add(error_attr_name, error_message_key, **filtered_options(value).merge(
+                min: min_value_in_human_size(record),
+                max: max_value_in_human_size(record),
+                count: human_size(option_value)
+              ))
+            end
+          end
+        end
+      end
+    end
+
+    module AttachmentContentTypeValidatorExtensions
+      def mark_invalid(record, attribute, types)
+        record.errors.add attribute, :invalid, **options.merge({ types: types.join(', ') })
+      end
+    end
+
+    module AttachmentPresenceValidatorExtensions
+      def validate_each(record, attribute, _value)
+        if record.send("#{attribute}_file_name").blank?
+          record.errors.add(attribute, :blank, **options)
+        end
+      end
+    end
+
+    module AttachmentFileNameValidatorExtensions
+      def mark_invalid(record, attribute, patterns)
+        record.errors.add attribute, :invalid, options.merge({ names: patterns.join(', ') })
+      end
+    end
+  end
+end
+
+Paperclip::Validators::AttachmentSizeValidator.prepend(Paperclip::Validators::AttachmentSizeValidatorExtensions)
+Paperclip::Validators::AttachmentContentTypeValidator.prepend(Paperclip::Validators::AttachmentContentTypeValidatorExtensions)
+Paperclip::Validators::AttachmentPresenceValidator.prepend(Paperclip::Validators::AttachmentPresenceValidatorExtensions)
+Paperclip::Validators::AttachmentFileNameValidator.prepend(Paperclip::Validators::AttachmentFileNameValidatorExtensions)