Add case when artifacts have not existed on dependencies

app/models/ci/build.rb

@@ -143,9 +143,7 @@ module Ci
       end
       before_transition any => [:running] do |build|
-        if build.specified_dependencies? && build.dependencies.empty?
-          raise MissingDependenciesError
-        end
+        build.validates_dependencies!
       end
     end
@@ -486,8 +484,20 @@ module Ci
       options[:dependencies]&.empty?
     end
-    def specified_dependencies?
-      options.has_key?(:dependencies) && options[:dependencies].any?
+    def validates_dependencies!
+      dependencies.tap do |deps|
+        # When `dependencies` keyword is given and depended jobs are skipped by `only` keyword
+        if options[:dependencies]&.any? && deps.empty?
+          raise MissingDependenciesError
+        end
+
+        # When artifacts of depended jobs have not existsed
+        deps.each do |dep|
+          if dep.options[:artifacts]&.any? && !dep.artifacts?
+            raise MissingDependenciesError
+          end
+        end
+      end
     end
     def hide_secrets(trace)

doc/ci/yaml/README.md

@@ -1107,7 +1107,7 @@ To use this feature, define `dependencies` in context of the job and pass
 a list of all previous jobs from which the artifacts should be downloaded.
 You can only define jobs from stages that are executed before the current one.
 An error will be shown if you define jobs from the current stage or next ones,
-or there are no depended jobs in previous stages.
+or there are no depended jobs with artifacts in previous stages.
 Defining an empty array will skip downloading any artifacts for that job.
 The status of the previous job is not considered when using `dependencies`, so
 if it failed or it is a manual job that was not run, no error occurs.

spec/models/ci/build_spec.rb

@@ -1887,9 +1887,28 @@ describe Ci::Build do
       let(:options) { { dependencies: ['test'] } }
       context 'when a depended job exists' do
-        let!(:pre_build) { create(:ci_build, pipeline: pipeline, name: 'test', stage_idx: 0) }
+        let!(:pre_stage_job) { create(:ci_build, pipeline: pipeline, name: 'test', stage_idx: 0) }
         it { expect { build.run! }.not_to raise_error }
+
+        context 'when "artifacts" keyword is specified on depended job' do
+          let!(:pre_stage_job) do
+            create(:ci_build, :artifacts, pipeline: pipeline, name: 'test', stage_idx: 0,
+                              options: { artifacts: { paths: ['binaries/'] } } )
+          end
+
+          context 'when artifacts of depended job has existsed' do
+            it { expect { build.run! }.not_to raise_error }
+          end
+
+          context 'when artifacts of depended job has not existsed' do
+            before do
+              pre_stage_job.erase_artifacts!
+            end
+
+            it { expect { build.run! }.to raise_error(Ci::Build::MissingDependenciesError) }
+          end
+        end
       end
       context 'when depended jobs do not exist' do

spec/services/ci/register_job_service_spec.rb

@@ -291,6 +291,31 @@ module Ci
           it "picks the build" do
             expect(picked_job).to eq(pending_job)
           end
+
+          context 'when "artifacts" keyword is specified on depended job' do
+            let!(:pre_stage_job) do
+              create(:ci_build, :success, :artifacts, pipeline: pipeline, name: job_name, stage_idx: 0,
+                                options: { artifacts: { paths: ['binaries/'] } } )
+            end
+
+            context 'when artifacts of depended job has existsed' do
+              it "picks the build" do
+                expect(picked_job).to eq(pending_job)
+              end
+            end
+
+            context 'when artifacts of depended job has not existsed' do
+              before do
+                pre_stage_job.erase_artifacts!
+              end
+
+              it 'does not pick the build and drops the build' do
+                expect(picked_job).to be_nil
+                expect(pending_job.reload).to be_failed
+                expect(pending_job).to be_missing_dependency_failure
+              end
+            end
+          end
         end
         context 'when depended jobs do not exist' do