Show ignore conditions in a request body (dependabot#7654)

* Added ignore condition to message builder class to show the ignore conditions of the dependencies in the PR body.

common/lib/dependabot/pull_request_creator/message_builder.rb

@@ -23,15 +23,15 @@ class MessageBuilder
                   :pr_message_header, :pr_message_footer,
                   :commit_message_options, :vulnerabilities_fixed,
                   :github_redirection_service, :dependency_group, :pr_message_max_length,
-                  :pr_message_encoding
+                  :pr_message_encoding, :ignore_conditions
 
       TRUNCATED_MSG = "...\n\n_Description has been truncated_"
 
       def initialize(source:, dependencies:, files:, credentials:,
                      pr_message_header: nil, pr_message_footer: nil,
                      commit_message_options: {}, vulnerabilities_fixed: {},
                      github_redirection_service: DEFAULT_GITHUB_REDIRECTION_SERVICE,
-                     dependency_group: nil, pr_message_max_length: nil, pr_message_encoding: nil)
+                     dependency_group: nil, pr_message_max_length: nil, pr_message_encoding: nil, ignore_conditions: [])
         @dependencies               = dependencies
         @files                      = files
         @source                     = source
@@ -44,6 +44,7 @@ def initialize(source:, dependencies:, files:, credentials:,
         @dependency_group           = dependency_group
         @pr_message_max_length      = pr_message_max_length
         @pr_message_encoding        = pr_message_encoding
+        @ignore_conditions          = ignore_conditions
       end
 
       attr_writer :pr_message_max_length
@@ -57,13 +58,31 @@ def pr_name
       end
 
       def pr_message
-        msg = "#{suffixed_pr_message_header}#{commit_message_intro}#{metadata_cascades}#{prefixed_pr_message_footer}"
+        # TODO: Remove unignore_commands? feature flag once we are confident
+        # that it is working as expected
+        msg = if unignore_commands?
+                "#{suffixed_pr_message_header}" \
+                  "#{commit_message_intro}" \
+                  "#{metadata_cascades}" \
+                  "#{ignore_conditions_table}" \
+                  "#{prefixed_pr_message_footer}"
+              else
+                "#{suffixed_pr_message_header}" \
+                  "#{commit_message_intro}" \
+                  "#{metadata_cascades}" \
+                  "#{prefixed_pr_message_footer}"
+              end
+
         truncate_pr_message(msg)
       rescue StandardError => e
         Dependabot.logger.error("Error while generating PR message: #{e.message}")
         suffixed_pr_message_header + prefixed_pr_message_footer
       end
 
+      def unignore_commands?
+        Experiments.enabled?(:unignore_commands)
+      end
+
       # Truncate PR message as determined by the pr_message_max_length and pr_message_encoding instance variables
       # The encoding is used when calculating length, all messages are returned as ruby UTF_8 encoded string
       def truncate_pr_message(msg)
@@ -504,6 +523,46 @@ def metadata_cascades_for_dep(dependency)
         ).to_s
       end
 
+      def ignore_conditions_table
+        # Return an empty string if ignore_conditions is empty
+        return "" if @ignore_conditions.empty?
+
+        # Filter out the conditions where from_config_file is false and dependency is in @dependencies
+        valid_ignore_conditions = @ignore_conditions.select do |ic|
+          !ic[:from_config_file] && dependencies.any? { |dep| dep.name == ic[:dependency_name] }
+        end
+
+        # Return an empty string if no valid ignore conditions after filtering
+        return "" if valid_ignore_conditions.empty?
+
+        # Sort them by updated_at (or created_at if updated_at is nil), taking the latest 20
+        sorted_ignore_conditions = valid_ignore_conditions.sort_by { |ic| ic[:updated_at] || ic[:created_at] }.last(20)
+
+        # Map each condition to a row string
+        table_rows = sorted_ignore_conditions.map do |ic|
+          "| #{ic[:dependency_name]} | [#{ic[:version_requirement]}] |"
+        end
+
+        summary = "Most Recent Ignore Conditions Applied to This Pull Request"
+        build_table(summary, table_rows)
+      end
+
+      def build_table(summary, rows)
+        table_header = "| Dependency Name | Ignore Conditions |"
+        table_divider = "| --- | --- |"
+        table_body = rows.join("\n")
+        body = "\n#{[table_header, table_divider, table_body].join("\n")}\n"
+
+        if %w(azure bitbucket codecommit).include?(source.provider)
+          "\n##{summary}\n\n#{body}"
+        else
+          # Build the collapsible section
+          msg = "<details>\n<summary>#{summary}</summary>\n\n" \
+                "#{[table_header, table_divider, table_body].join("\n")}\n</details>"
+          "\n#{msg}\n"
+        end
+      end
+
       def changelog_url(dependency)
         metadata_finder(dependency).changelog_url
       end