Initial detection of Auto-DevOps buildable projects

01431ae3 · James Fargher · 34f5eb1b · 01431ae3 · 01431ae3 · 01431ae3
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -809,11 +809,16 @@ def ci_yaml_from_repo
    def implied_ci_yaml_file
      return unless project
-      if project.auto_devops_enabled?
+      if project.auto_devops_enabled? && auto_devops_buildable?
        Gitlab::Template::GitlabCiYmlTemplate.find('Auto-DevOps').content
      end
    end
+    def auto_devops_buildable?
+      project.has_auto_devops_explicitly_enabled? ||
+        Gitlab::AutoDevops::BuildableDetector.new(project, sha).buildable?
+    end
    def pipeline_data
      Gitlab::DataBuilder::Pipeline.build(self)
    end

--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -665,10 +665,14 @@ def auto_devops_enabled?
    if auto_devops&.enabled.nil?
      has_auto_devops_implicitly_enabled?
    else
-      auto_devops.enabled?
+      has_auto_devops_explicitly_enabled?
    end
  end
+  def has_auto_devops_explicitly_enabled?
+    auto_devops&.enabled?
+  end
  def has_auto_devops_implicitly_enabled?
    auto_devops_config = first_auto_devops_config

--- a/lib/gitlab/auto_devops/buildable_detector.rb
+++ b/lib/gitlab/auto_devops/buildable_detector.rb
+# frozen_string_literal: true
+module Gitlab
+  module AutoDevops
+    class BuildableDetector
+      VARIABLES = [
+        'BUILDPACK_URL'
+      ].freeze
+      FILE_PATTERNS = [
+        'Dockerfile',
+        # https://github.com/heroku/heroku-buildpack-clojure
+        'project.clj',
+        # https://github.com/heroku/heroku-buildpack-go
+        'go.mod',
+        'Gopkg.mod',
+        'Godeps/Godeps.json',
+        'vendor/vendor.json',
+        'glide.yaml',
+        'src/**.go',
+        # https://github.com/heroku/heroku-buildpack-gradle
+        'gradlew',
+        'build.gradle',
+        'settings.gradle',
+        # https://github.com/heroku/heroku-buildpack-java
+        'pom.xml',
+        'pom.atom',
+        'pom.clj',
+        'pom.groovy',
+        'pom.rb',
+        'pom.scala',
+        'pom.yaml',
+        'pom.yml',
+        # https://github.com/heroku/heroku-buildpack-multi
+        '.buildpacks',
+        # https://github.com/heroku/heroku-buildpack-nodejs
+        'package.json',
+        # https://github.com/heroku/heroku-buildpack-php
+        'composer.json',
+        'index.php',
+        # https://github.com/heroku/heroku-buildpack-play
+        # TODO: detect script excludes some scala files
+        '*/conf/application.conf',
+        '*modules*',
+        # https://github.com/heroku/heroku-buildpack-python
+        # TODO: detect script checks that all of these exist, not any
+        'requirements.txt',
+        'setup.py',
+        'Pipfile',
+        # https://github.com/heroku/heroku-buildpack-ruby
+        'Gemfile',
+        # https://github.com/heroku/heroku-buildpack-scala
+        '*.sbt',
+        'project/*.scala',
+        '.sbt/*.scala',
+        'project/build.properties',
+        # https://github.com/dokku/buildpack-nginx
+        '.static'
+      ].freeze
+      def initialize(project, ref)
+        @project = project
+        @ref = ref
+      end
+      def buildable?
+        detected_variables? || detected_files?
+      end
+      private
+      attr_accessor :project, :ref
+      def detected_variables?
+        project.ci_variables_for(ref: ref).where(key: VARIABLES).exists?
+      end
+      def detected_files?
+        return unless tree = project.repository.tree(ref)
+        tree.blobs.find do |blob|
+          FILE_PATTERNS.any? do |pattern|
+            File.fnmatch?(pattern, blob.path, File::FNM_CASEFOLD)
+          end
+        end
+      rescue Gitlab::Git::Repository::NoRepository
+        # nop
+      end
+    end
+  end
+end
--- a/lib/gitlab/ci/pipeline/chain/validate/config.rb
+++ b/lib/gitlab/ci/pipeline/chain/validate/config.rb
@@ -11,7 +11,11 @@ class Config < Chain::Base
            def perform!
              unless @pipeline.config_processor
                unless @pipeline.ci_yaml_file
-                  return error("Missing #{@pipeline.ci_yaml_file_path} file")
+                  if @pipeline.project.auto_devops_enabled?
+                    return error("Auto-DevOps enabled but no buildable files found")
+                  else
+                    return error("Missing #{@pipeline.ci_yaml_file_path} file")
+                  end
                end
                if @command.save_incompleted && @pipeline.has_yaml_errors?

--- a/spec/lib/gitlab/auto_devops/buildable_detector_spec.rb
+++ b/spec/lib/gitlab/auto_devops/buildable_detector_spec.rb
+# frozen_string_literal: true
+require 'spec_helper'
+describe Gitlab::AutoDevops::BuildableDetector do
+  describe '#buildable?' do
+    let(:project) { create(:project) }
+    let(:ref) { :head }
+    subject(:detector) { described_class.new(project, ref) }
+    context 'no matching variables or files' do
+      it 'is not buildable' do
+        expect(detector).to_not be_buildable
+      end
+    end
+    context 'matching variable' do
+      before do
+        create(:ci_variable, project: project, key: 'BUILDPACK_URL')
+      end
+      it 'is buildable' do
+        expect(detector).to be_buildable
+      end
+    end
+    context 'matching file' do
+      let(:project) { create(:project, :custom_repo, files: { 'Dockerfile' => '' }) }
+      it 'is buildable' do
+        expect(detector).to be_buildable
+      end
+    end
+  end
+end