Require all templates to use default stages

Our templates are free to override the 'stages:'.
However, they should follow the convention to always include
'build', 'test', 'deploy' which are defaults when not defined.

changelogs/unreleased/require-all-templates-to-include-default-stages.yml

+---
+title: Require all templates to use default stages
+merge_request: 26954
+author:
+type: fixed

lib/gitlab/ci/config.rb

@@ -73,17 +73,13 @@ module Gitlab
       def build_config(config, project:, sha:, user:)
         initial_config = Gitlab::Config::Loader::Yaml.new(config).load!
 
-        if project
         process_external_files(initial_config, project: project, sha: sha, user: user)
-        else
-          initial_config
-        end
       end
 
       def process_external_files(config, project:, sha:, user:)
         Config::External::Processor.new(config,
           project: project,
-          sha: sha || project.repository.root_ref_sha,
+          sha: sha || project&.repository&.root_ref_sha,
           user: user,
           expandset: Set.new).perform
       end

lib/gitlab/ci/config/external/file/local.rb

@@ -21,7 +21,9 @@ module Gitlab
             private
 
             def validate_content!
-              if content.nil?
+              if context.project&.repository.nil?
+                errors.push("Local file `#{location}` does not have project!")
+              elsif content.nil?
                 errors.push("Local file `#{location}` does not exist!")
               elsif content.blank?
                 errors.push("Local file `#{location}` is empty!")

lib/gitlab/ci/templates/Android-Fastlane.gitlab-ci.yml

@@ -6,6 +6,7 @@ stages:
   - environment
   - build
   - test
+  - deploy
   - internal
   - alpha
   - beta

lib/gitlab/ci/templates/Android.gitlab-ci.yml

@@ -24,10 +24,6 @@ before_script:
   - yes | android-sdk-linux/tools/bin/sdkmanager --licenses
   - set -o pipefail
 
-stages:
-  - build
-  - test
-
 lintDebug:
   stage: build
   script:

lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml

@@ -60,6 +60,7 @@ variables:
 stages:
   - build
   - test
+  - deploy # dummy stage to follow the template guidelines
   - review
   - dast
   - staging

lib/gitlab/ci/templates/Chef.gitlab-ci.yml

@@ -14,9 +14,11 @@ variables:
   KITCHEN_LOCAL_YAML: ".kitchen.dokken.yml"
 
 stages:
+  - build
   - lint
-  - unit
+  - test
   - functional
+  - deploy
 
 foodcritic:
   stage: lint
@@ -29,7 +31,7 @@ cookstyle:
   - chef exec cookstyle .
 
 chefspec:
-  stage: unit
+  stage: test
   script:
   - chef exec rspec spec
 

lib/gitlab/ci/templates/Go.gitlab-ci.yml

@@ -18,6 +18,7 @@ before_script:
 stages:
     - test
     - build
+    - deploy
 
 format:
     stage: test

lib/gitlab/ci/templates/Mono.gitlab-ci.yml

@@ -15,6 +15,7 @@
 image: mono:latest
 
 stages:
+  - build
   - test
   - deploy
 

lib/gitlab/ci/templates/OpenShift.gitlab-ci.yml

 image: ayufan/openshift-cli
 
 stages:
+  - build # dummy stage to follow the template guidelines
   - test
+  - deploy # dummy stage to follow the template guidelines
   - review
   - staging
   - production

lib/gitlab/ci/templates/Packer.gitlab-ci.yml

@@ -9,6 +9,8 @@ before_script:
 
 stages:
   - validate
+  - build
+  - test
   - deploy
 
 validate:

lib/gitlab/ci/templates/Serverless.gitlab-ci.yml

@@ -4,6 +4,7 @@ image: alpine:latest
 
 stages:
   - build
+  - test
   - deploy
 
 .serverless:build:image:

lib/gitlab/ci/templates/Swift.gitlab-ci.yml

@@ -2,7 +2,9 @@
 # This file assumes an own GitLab CI runner, setup on a macOS system.
 stages:
   - build
+  - test
   - archive
+  - deploy
 
 build_project:
   stage: build

lib/gitlab/ci/templates/Terraform.gitlab-ci.yml

@@ -24,6 +24,7 @@ before_script:
 stages:
   - validate
   - build
+  - test
   - deploy
 
 validate:

lib/gitlab/ci/templates/iOS-Fastlane.gitlab-ci.yml

@@ -12,6 +12,8 @@
 
 stages:
   - build
+  - test
+  - deploy
 
 variables:
   LC_ALL: "en_US.UTF-8"

lib/gitlab/template/base_template.rb

@@ -16,6 +16,12 @@ module Gitlab
       end
       alias_method :key, :name
 
+      def full_name
+        Pathname.new(@path)
+          .relative_path_from(self.class.base_dir)
+          .to_s
+      end
+
       def content
         @finder.read(@path)
       end

spec/lib/gitlab/ci/templates/templates_spec.rb

@@ -3,46 +3,32 @@
 require 'spec_helper'
 
 describe "CI YML Templates" do
-  ABSTRACT_TEMPLATES = %w[Serverless].freeze
-  # These templates depend on the presence of the `project`
-  # param to enable processing of `include:` within CI config.
-  PROJECT_DEPENDENT_TEMPLATES = %w[Auto-DevOps DAST].freeze
-
-  def self.concrete_templates
-    Gitlab::Template::GitlabCiYmlTemplate.all.reject do |template|
-      ABSTRACT_TEMPLATES.include?(template.name)
-    end
-  end
-
-  def self.abstract_templates
-    Gitlab::Template::GitlabCiYmlTemplate.all.select do |template|
-      ABSTRACT_TEMPLATES.include?(template.name)
-    end
-  end
+  using RSpec::Parameterized::TableSyntax
 
-  describe 'concrete templates with CI/CD jobs' do
-    concrete_templates.each do |template|
-      it "#{template.name} template should be valid" do
-        # Trigger processing of included files
-        project = create(:project, :test_repo) if PROJECT_DEPENDENT_TEMPLATES.include?(template.name)
+  subject { Gitlab::Ci::YamlProcessor.new(content) }
 
-        expect { Gitlab::Ci::YamlProcessor.new(template.content, project: project) }
-          .not_to raise_error
-      end
-    end
+  where(:template_name) do
+    Gitlab::Template::GitlabCiYmlTemplate.all.map(&:full_name)
   end
 
-  describe 'abstract templates without concrete jobs defined' do
-    abstract_templates.each do |template|
-      it "#{template.name} template should be valid after being implemented" do
-        content = template.content + <<~EOS
+  with_them do
+    let(:content) do
+      <<~EOS
+        include:
+          - template: #{template_name}
+
         concrete_build_implemented_by_a_user:
-            stage: build
+          stage: test
           script: do something
       EOS
+    end
 
-        expect { Gitlab::Ci::YamlProcessor.new(content) }.not_to raise_error
+    it 'is valid' do
+      expect { subject }.not_to raise_error
     end
+
+    it 'require default stages to be included' do
+      expect(subject.stages).to include(*Gitlab::Ci::Config::Entry::Stages.default)
     end
   end
 end

spec/lib/gitlab/ci/yaml_processor_spec.rb

@@ -618,8 +618,8 @@ module Gitlab
           context "when an array is provided" do
             let(:include_content) { ["/local.gitlab-ci.yml"] }
 
-            it "does not return any error" do
-              expect { subject }.not_to raise_error
+            it "returns a validation error" do
+              expect { subject }.to raise_error(Gitlab::Ci::YamlProcessor::ValidationError, /does not have project/)
             end
           end
 
@@ -635,11 +635,18 @@ module Gitlab
             let(:include_content) do
               [
                 'https://gitlab.com/awesome-project/raw/master/.before-script-template.yml',
-                '/templates/.after-script-template.yml',
                 { template: 'Auto-DevOps.gitlab-ci.yml' }
               ]
             end
 
+            before do
+              WebMock.stub_request(:get, 'https://gitlab.com/awesome-project/raw/master/.before-script-template.yml')
+                .to_return(
+                  status: 200,
+                  headers: { 'Content-Type' => 'application/json' },
+                  body: 'prepare: { script: ls -al }')
+            end
+
             it "does not return any error" do
               expect { subject }.not_to raise_error
             end