Always run `package-and-qa` in scheduled pipelines

.gitlab/ci/qa.gitlab-ci.yml

@@ -58,10 +58,13 @@ update-qa-cache:
     - tooling/bin/find_change_diffs ${CHANGES_DIFFS_DIR}
   script:
     - |
-      if tooling/bin/qa/check_if_only_quarantined_specs ${CHANGES_DIFFS_DIR}; then
-        exit 0
-      else
+      tooling/bin/qa/package_and_qa_check ${CHANGES_DIFFS_DIR} && exit_code=$?
+      if [ $exit_code -eq 0 ]; then
         ./scripts/trigger-build omnibus
+      elif [ $exit_code -eq 1 ]; then
+        exit 1
+      else
+        echo "Downstream jobs will not be triggered because package_and_qa_check exited with code: $exit_code"
       fi
   # These jobs often time out, so temporarily use private runners and a long timeout: https://gitlab.com/gitlab-org/gitlab/-/issues/238563
   tags:

tooling/bin/find_change_diffs

@@ -5,11 +5,22 @@ require 'gitlab'
 require 'pathname'
 
 # This script saves the diffs of changes in an MR to the directory specified as the first argument
+#
+# It exits with a success code if diffs are found and saved, or if there are no changes, including if the script runs in
+# a pipeline that is not for a merge request.
 
 gitlab_token = ENV.fetch('PROJECT_TOKEN_FOR_CI_SCRIPTS_API_USAGE')
 gitlab_endpoint = ENV.fetch('CI_API_V4_URL')
-mr_project_path = ENV.fetch('CI_MERGE_REQUEST_PROJECT_PATH')
-mr_iid = ENV.fetch('CI_MERGE_REQUEST_IID')
+mr_project_path = ENV['CI_MERGE_REQUEST_PROJECT_PATH']
+mr_iid = ENV['CI_MERGE_REQUEST_IID']
+
+puts "CI_MERGE_REQUEST_PROJECT_PATH is missing." if mr_project_path.to_s.empty?
+puts "CI_MERGE_REQUEST_IID is missing." if mr_iid.to_s.empty?
+
+unless mr_project_path && mr_iid
+  puts "Exiting as this does not appear to be a merge request pipeline."
+  exit
+end
 
 abort("ERROR: Please specify a directory to write MR diffs into.") if ARGV.empty?
 output_diffs_dir = Pathname.new(ARGV.shift).expand_path

tooling/bin/qa/check_if_only_quarantined_specs

-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-require 'pathname'
-
-# This script assumes the first argument is a directory of files containing diffs of changes from an MR. It exits with a
-# success code if all diffs add a line that quarantines a test. If any diffs are not specs, or they are specs that don't
-# quarantine a test, it exits with code 1 to indicate failure (i.e., there was _not_ only quarantined specs).
-
-abort("ERROR: Please specify the directory containing MR diffs.") if ARGV.empty?
-diffs_dir = Pathname.new(ARGV.shift).expand_path
-
-diffs_dir.glob('**/*').each do |path|
-  next if path.directory?
-
-  exit 1 unless path.to_s.end_with?('_spec.rb.diff')
-  exit 1 unless path.read.match?(/^\+.*, quarantine:/)
-end

tooling/bin/qa/package_and_qa_check

+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require 'pathname'
+
+# This script checks if the package-and-qa job should trigger downstream pipelines to run the QA suite.
+#
+# It assumes the first argument is a directory of files containing diffs of changes from an MR
+# (e.g., created by tooling/bin/find_change_diffs). It exits with a success code if there are no diffs, or if the diffs
+# are suitable to run QA tests.
+#
+# The script will abort (exit code 1) if the argument is missing.
+#
+# The following condition will result in a failure code (2), indicating that package-and-qa should not run:
+#
+#   - If the changes only include tests being put in quarantine
+
+abort("ERROR: Please specify the directory containing MR diffs.") if ARGV.empty?
+diffs_dir = Pathname.new(ARGV.shift).expand_path
+
+# Run package-and-qa if there are no diffs. E.g., in scheduled pipelines
+exit 0 if diffs_dir.glob('**/*').empty?
+
+files_count = 0
+specs_count = 0
+quarantine_specs_count = 0
+
+diffs_dir.glob('**/*').each do |path|
+  next if path.directory?
+
+  files_count += 1
+  next unless path.to_s.end_with?('_spec.rb.diff')
+
+  specs_count += 1
+  quarantine_specs_count += 1 if path.read.match?(/^\+.*, quarantine:/)
+end
+
+# Run package-and-qa if there are no specs. E.g., when the MR changes QA framework files.
+exit 0 if specs_count == 0
+
+# Skip package-and-qa if there are only specs being put in quarantine.
+exit 2 if quarantine_specs_count == specs_count && quarantine_specs_count == files_count
+
+# Run package-and-qa under any other circumstances. E.g., if there are specs being put in quarantine but there are also
+# other changes that might need to be tested.