1 files changed, 48 insertions, 0 deletions
diff --git a/scripts/lib/glfm/verify_all_generated_files_are_up_to_date.rb b/scripts/lib/glfm/verify_all_generated_files_are_up_to_date.rb
new file mode 100644
index 00000000000..0b824fc589d
--- /dev/null
+++ b/scripts/lib/glfm/verify_all_generated_files_are_up_to_date.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+require_relative 'constants'
+require_relative 'shared'
+
+# IMPORTANT NOTE: See https://docs.gitlab.com/ee/development/gitlab_flavored_markdown/specification_guide/#verify-all-generated-files-are-up-to-daterb-script
+# for details on the implementation and usage of this script. This developers guide
+# contains diagrams and documentation of this script,
+# including explanations and examples of all files it reads and writes.
+module Glfm
+  class VerifyAllGeneratedFilesAreUpToDate
+    include Constants
+    include Shared
+
+    def process
+      verify_cmd = "git status --porcelain #{GLFM_SPEC_OUTPUT_PATH} #{EXAMPLE_SNAPSHOTS_PATH}"
+      verify_cmd_output = run_external_cmd(verify_cmd)
+      unless verify_cmd_output.empty?
+        msg = "ERROR: Cannot run `#{__FILE__}` because `#{verify_cmd}` shows the following uncommitted changes:\n" \
+          "#{verify_cmd_output}"
+        raise(msg)
+      end
+
+      output('Verifying all generated files are up to date after running GLFM scripts...')
+
+      output("Running `yarn install --frozen-lockfile` to ensure `yarn check-dependencies` doesn't fail...")
+      run_external_cmd('yarn install --frozen-lockfile')
+
+      # noinspection RubyMismatchedArgumentType
+      update_specification_script = File.expand_path('../../glfm/update-specification.rb', __dir__)
+      # noinspection RubyMismatchedArgumentType
+      update_example_snapshots_script = File.expand_path('../../glfm/update-example-snapshots.rb', __dir__)
+
+      output("Running `#{update_specification_script}`...")
+      run_external_cmd(update_specification_script)
+
+      output("Running `#{update_example_snapshots_script}`...")
+      run_external_cmd(update_example_snapshots_script)
+
+      output("Running `#{verify_cmd}` to check that no modifications to generated files have occurred...")
+      verify_cmd_output = run_external_cmd(verify_cmd)
+
+      return if verify_cmd_output.empty?
+
+      raise "The following files were modified by running GLFM scripts. Please review, verify, and commit " \
+        "the changes:\n#{verify_cmd_output}"
+    end
+  end
+end